diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5027018786..1aa2a7c668 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -188,6 +188,7 @@ set(CC_SOURCES
     src/misc/nvmlwrap_stub.cc
     src/misc/rocm_smi_wrap.cc
     src/misc/profiler.cc
+    src/misc/npkit.cc
     src/misc/shmutils.cc
     src/misc/signals.cc              # RCCL
     src/misc/socket.cc
@@ -220,6 +221,10 @@ if(PROFILE)
   add_definitions(-DENABLE_PROFILING)
 endif()
 
+if(NPKIT_FLAGS)
+  add_definitions(${NPKIT_FLAGS})
+endif()
+
 set(COLLTRACE 1 CACHE BOOL "Collective Trace Option")
 if(COLLTRACE)
   add_definitions(-DENABLE_COLLTRACE)
diff --git a/README.md b/README.md
index 6c3aa69d63..e0026476a9 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,18 @@ will run only AllReduce correctness tests with float32 datatype. See "Running a
 There are also other performance and error-checking tests for RCCL.  These are maintained separately at https://github.com/ROCmSoftwarePlatform/rccl-tests.
 See the rccl-tests README for more information on how to build and run those tests.
 
+## NPKit
+
+RCCL integrates [NPKit](https://github.com/microsoft/npkit), a profiler framework that enables collecting fine-grained trace events in RCCL components, especially in giant collective GPU kernels.
+
+Please check [NPKit sample workflow for RCCL](https://github.com/microsoft/NPKit/tree/main/rccl_samples) as a fully automated usage example. It also provides good templates for the following manual instructions.
+
+To manually build RCCL with NPKit enabled, pass `-DNPKIT_FLAGS="-DENABLE_NPKIT -DENABLE_NPKIT_...(other NPKit compile-time switches)"` with cmake command. All NPKit compile-time switches are declared in the RCCL code base as macros with prefix `ENABLE_NPKIT_`, and they control which information will be collected. Also note that currently NPKit only supports collecting non-overlapped events on GPU, and `-DNPKIT_FLAGS` should follow this rule.
+
+To manually run RCCL with NPKit enabled, environment variable `NPKIT_DUMP_DIR` needs to be set as the NPKit event dump directory. Also note that currently NPKit only supports 1 GPU per process.
+
+To manually analyze NPKit dump results, please leverage [npkit_trace_generator.py](https://github.com/microsoft/NPKit/blob/main/rccl_samples/npkit_trace_generator.py).
+
 ## Library and API Documentation
 
 Please refer to the [Library documentation](https://rccl.readthedocs.io/) for current documentation.
diff --git a/src/collectives/device/all_reduce.h b/src/collectives/device/all_reduce.h
index 0529653248..b041b6bf1b 100644
--- a/src/collectives/device/all_reduce.h
+++ b/src/collectives/device/all_reduce.h
@@ -10,6 +10,10 @@
 #include "primitives.h"
 //#include "clique/AllReduceCliqueKernel.h" // [RCCL] AllReduce Clique-based kernel support
 
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit.h"
+#endif
+
 namespace {
   template<typename T, typename RedOp, typename Proto>
   __device__ __attribute__((noinline)) void runRing(ncclWorkElem *args) {
@@ -29,6 +33,32 @@ namespace {
 #endif
     const ssize_t size = args->count;
 
+#if defined(ENABLE_NPKIT)
+    int npKitCtxIdx = bid;
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_CPU)
+    if (tid == 0) {
+      uint64_t* cpuTimestamp = ncclShmem->comm.cpuTimestamp;
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_CPU, 0, 0, *cpuTimestamp,
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_GPU)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_GPU, 0, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
     int minChunkSize;
     if (Proto::Id == NCCL_PROTO_LL)
       minChunkSize = nthreads*(Proto::calcBytePerGrain()/sizeof(T));
@@ -42,6 +72,12 @@ namespace {
       (tid, nthreads, &ring->prev, &ring->next, args->sendbuff, args->recvbuff, args->redOpArg, args->connIndex << 16);
     ACCUMULATE_PRIM_COUNTER(prim);
 
+#if defined(ENABLE_NPKIT)
+    if (tid == 0) {
+      prims.npKitCtxIdx = npKitCtxIdx;
+    }
+#endif
+
     for (ssize_t gridOffset = 0; gridOffset < size; gridOffset += loopSize) {
       ssize_t realChunkSize;
       if (Proto::Id == NCCL_PROTO_SIMPLE) {
@@ -70,11 +106,36 @@ namespace {
       chunk = modRanks(ringIx + nranks-1);
       offset = calcOffset(chunk);
       nelem = min(realChunkSize, size-offset);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_SEND_ENTRY)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_SEND_ENTRY, nelem*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       INIT_COUNTER;
       prims.send(offset, nelem);
       ACCUMULATE_COUNTER(send);
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_SEND_EXIT)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_SEND_EXIT, nelem*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
       // k-2 steps: reduce and copy to next GPU
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_RECV_REDUCE_SEND_ENTRY)
+      if (tid == 0 && nranks > 2) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_RECV_REDUCE_SEND_ENTRY, nelem*(nranks-2)*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       for (int j=2; j<nranks; ++j) {
         chunk = modRanks(ringIx + nranks-j);
         offset = calcOffset(chunk);
@@ -84,15 +145,46 @@ namespace {
         ACCUMULATE_COUNTER(recvReduceSend);
       }
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_RECV_REDUCE_SEND_EXIT)
+      if (tid == 0 && nranks > 2) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_RECV_REDUCE_SEND_EXIT, nelem*(nranks-2)*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
       // step k-1: reduce this buffer and data, which will produce the final
       // result that we store in this data and push to the next GPU
       chunk = ringIx + 0;
       offset = calcOffset(chunk);
       nelem = min(realChunkSize, size-offset);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_REDUCE_COPY_SEND_ENTRY)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_REDUCE_COPY_SEND_ENTRY, nelem*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       INIT_COUNTER;
       prims.directRecvReduceCopySend(offset, offset, offset, nelem, /*postOp=*/true);
       ACCUMULATE_COUNTER(directRecvReduceCopySend);
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_REDUCE_COPY_SEND_EXIT)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_REDUCE_COPY_SEND_EXIT, nelem*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_COPY_SEND_ENTRY)
+      if (tid == 0 && nranks > 2) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_COPY_SEND_ENTRY, nelem*(nranks-2)*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       // k-2 steps: copy to next GPU
       for (int j=1; j<nranks-1; ++j) {
         chunk = modRanks(ringIx + nranks-j);
@@ -103,13 +195,37 @@ namespace {
         ACCUMULATE_COUNTER(directRecvCopySend);
       }
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_COPY_SEND_EXIT)
+      if (tid == 0 && nranks > 2) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_COPY_SEND_EXIT, nelem*(nranks-2)*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
       // Make final copy from buffer to dest.
       chunk = modRanks(ringIx + 1);
       offset = calcOffset(chunk);
       nelem = min(realChunkSize, size-offset);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_ENTRY)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_ENTRY, nelem*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       INIT_COUNTER;
       prims.directRecv(offset, nelem);
       ACCUMULATE_COUNTER(directRecv);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_EXIT)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_EXIT, nelem*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
 #ifdef ENABLE_PROFILING
     if (tid == 0) {
@@ -117,6 +233,14 @@ namespace {
       elem->elem[blockIdx.x].total_cycle += (__builtin_amdgcn_s_memrealtime() - clk);
     }
 #endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_RING_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_RING_EXIT, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
   }
 
   template<typename T, typename RedOp, typename Proto>
@@ -135,12 +259,53 @@ namespace {
     const ssize_t loopSize = int(nChannels*chunkSize);
     const ssize_t size = args->count;
 
+#if defined(ENABLE_NPKIT)
+    int npKitCtxIdx = bid;
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_CPU)
+    if (tid == 0) {
+      uint64_t* cpuTimestamp = ncclShmem->comm.cpuTimestamp;
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_CPU, 0, 0, *cpuTimestamp,
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_GPU)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_GPU, 0, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
     if (loopSize > size)
       chunkSize = divUp((int)size, int(nChannels*minChunkSize))*int(minChunkSize);
 
     { // Reduce : max number of recv is 3, max number of send is 1 (binary tree + local)
       Primitives<T, RedOp, FanAsymmetric<NCCL_MAX_DEV_ARITY, 1>, /*Direct=*/0, Proto, 0> prims
         (tid, nthreads, tree->down, &tree->up, args->sendbuff, args->recvbuff, args->redOpArg);
+
+#if defined(ENABLE_NPKIT)
+      if (tid == 0) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_REDUCE_ENTRY)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_REDUCE_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       if (tree->up == -1) {
         for (ssize_t gridOffset = 0; gridOffset < size; gridOffset += loopSize) {
           ssize_t offset = gridOffset + bid*int(chunkSize);
@@ -162,11 +327,34 @@ namespace {
           prims.recvReduceSend(offset, nelem);
         }
       }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_REDUCE_EXIT)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_REDUCE_EXIT, size*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
 
     { // Broadcast : max number of recv is 1, max number of send is 3 (binary tree + local)
       Primitives<T, RedOp, FanAsymmetric<1, NCCL_MAX_DEV_ARITY>, /*Direct=*/0, Proto, 0> prims
         (tid, nthreads, &tree->up, tree->down, args->sendbuff, args->recvbuff, args->redOpArg);
+
+#if defined(ENABLE_NPKIT)
+      if (tid == 0) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_BROADCAST_ENTRY)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_BROADCAST_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       if (tree->up == -1) {
         for (ssize_t gridOffset = 0; gridOffset < size; gridOffset += loopSize) {
           ssize_t offset = gridOffset + bid*int(chunkSize);
@@ -188,7 +376,23 @@ namespace {
           prims.directRecvCopySend(offset, offset, nelem);
         }
       }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_BROADCAST_EXIT)
+      if (tid == 0) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_BROADCAST_EXIT, size*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_EXIT, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
   }
 
   template<typename T, typename RedOp, typename Proto>
@@ -217,6 +421,40 @@ namespace {
       nthreadsSplit = (nthreads*7/(10*WARP_SIZE))*WARP_SIZE;
     }
 
+#if defined(ENABLE_NPKIT)
+    bool isNpKitThread = false;
+    int npKitCtxIdx = 0;
+    if (threadIdx.x == 0) {
+      isNpKitThread = true;
+      npKitCtxIdx = bid * 2;
+    } else if (tree->up != -1 && threadIdx.x == nthreadsSplit) {
+      isNpKitThread = true;
+      npKitCtxIdx = bid * 2 + 1;
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_CPU)
+    if (isNpKitThread) {
+      uint64_t* cpuTimestamp = ncclShmem->comm.cpuTimestamp;
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_CPU, 0, 0, *cpuTimestamp,
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_GPU)
+    if (isNpKitThread) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_GPU, 0, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_ENTRY)
+    if (isNpKitThread) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
     if (loopSize > size)
       chunkSize = divUp((int)size, nChannels*int(minChunkSize))*int(minChunkSize);
 
@@ -224,11 +462,34 @@ namespace {
       // Reduce and broadcast. Max number of recv is 3, max number of send is 3
       Primitives<T, RedOp, FanSymmetric<NCCL_MAX_DEV_ARITY>, /*Direct=*/0, Proto, 0>
         prims(tid, nthreads, tree->down, tree->down, args->sendbuff, args->recvbuff, args->redOpArg);
+
+#if defined(ENABLE_NPKIT)
+      if (isNpKitThread) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_BROADCAST_ENTRY)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_BROADCAST_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       for (ssize_t gridOffset = 0; gridOffset < size; gridOffset += loopSize) {
         ssize_t offset = gridOffset + bid*int(chunkSize);
         int nelem = min(chunkSize, size-offset);
         prims.directRecvReduceCopySend(offset, offset, offset, nelem, /*doPost=*/true);
       }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_BROADCAST_EXIT)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_BROADCAST_EXIT, size*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
     else if (tid < nthreadsSplit) {
       /* Reduce up. Max number of recv is 3, max number of send is 1 (binary tree + local).
@@ -241,6 +502,21 @@ namespace {
        */
       Primitives<T, RedOp, FanAsymmetric<NCCL_MAX_DEV_ARITY, 1>, /*Direct=*/0, Proto, 0>
         prims(tid, nthreadsSplit, tree->down, &tree->up, args->sendbuff, args->recvbuff, args->redOpArg, 0*Proto::MaxGroupWidth);
+
+#if defined(ENABLE_NPKIT)
+      if (isNpKitThread) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_ENTRY)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       if (tree->down[0] == -1) {
         for (ssize_t gridOffset = 0; gridOffset < size; gridOffset += loopSize) {
           ssize_t offset = gridOffset + bid*int(chunkSize);
@@ -255,11 +531,34 @@ namespace {
           prims.recvReduceSend(offset, nelem);
         }
       }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_EXIT)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_EXIT, size*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
     else {
       // Broadcast down. Max number of recv is 1, max number of send is 3 (binary tree + local)
       Primitives<T, RedOp, FanAsymmetric<1, NCCL_MAX_DEV_ARITY>, /*Direct=*/0, Proto, 0>
         prims(tid-nthreadsSplit, nthreads-nthreadsSplit, &tree->up, tree->down, args->sendbuff, args->recvbuff, args->redOpArg, 1*Proto::MaxGroupWidth);
+
+#if defined(ENABLE_NPKIT)
+      if (isNpKitThread) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_BROADCAST_ENTRY)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_BROADCAST_ENTRY, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       if (tree->down[0] == -1) {
         for (ssize_t gridOffset = 0; gridOffset < size; gridOffset += loopSize) {
           ssize_t offset = gridOffset + bid*int(chunkSize);
@@ -274,7 +573,23 @@ namespace {
           prims.directRecvCopySend(offset, offset, nelem);
         }
       }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_BROADCAST_EXIT)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_BROADCAST_EXIT, size*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_EXIT)
+    if (isNpKitThread) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_EXIT, size*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
   }
 }
 
diff --git a/src/collectives/device/prims_ll.h b/src/collectives/device/prims_ll.h
index ef916628bb..bdc711058f 100644
--- a/src/collectives/device/prims_ll.h
+++ b/src/collectives/device/prims_ll.h
@@ -5,6 +5,10 @@
  * See LICENSE.txt for license information
  ************************************************************************/
 
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit.h"
+#endif
+
 template<typename T, typename RedOp, typename Fan, int Direct, int P2p>
 class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
   public PrimitivesWithoutDirect<Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>> {
@@ -34,6 +38,22 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
   union ncclLLFifoLine* recvBuff[MaxRecv];
   union ncclLLFifoLine* sendBuff[MaxSend];
 
+#if defined(ENABLE_NPKIT)
+public:
+  int npKitCtxIdx = 0;
+  uint64_t npKitDataProcessEntryTime = 0;
+  uint64_t npKitDataProcessExitTime = 0;
+  uint64_t npKitDataProcessTotalTime = 0;
+private:
+#endif
+
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+  uint64_t npKitWaitRecvDataProcessSize = 0;
+  uint64_t npKitWaitRecvEntryTime = 0;
+  uint64_t npKitWaitRecvExitTime = 0;
+  uint64_t npKitWaitRecvTotalTime = 0;
+#endif
+
   inline __device__ int recvOffset(int i) { return (recvStep[i]%NCCL_STEPS)*stepLines; }
   inline __device__ int sendOffset(int i) { return (sendStep[i]%NCCL_STEPS)*stepLines; }
   inline __device__ union ncclLLFifoLine* recvPtr(int i) { return recvBuff[i]+recvOffset(i); }
@@ -70,6 +90,12 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
   }
 
   inline __device__ void waitSend(int nbytes) {
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_WAIT_SEND_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_LL_WAIT_SEND_ENTRY, nbytes, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
     if (sendConnHeadPtr) {
       int spins = 0;
       while (sendConnHeadCache + NCCL_STEPS < sendConnHead + 1) {
@@ -83,6 +109,12 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
       sendConnHead += 1;
     }
     barrier();
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_WAIT_SEND_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_LL_WAIT_SEND_EXIT, nbytes, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
 
   inline __device__ void incRecv(int i) {
@@ -107,21 +139,43 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
     uint32_t flag = recvFlag(i);
     uint32_t data1, flag1, data2, flag2;
     int spins = 0;
+
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+    int npkitWaitRecvSpins = 0;
+    if (tid == 0) {
+      npKitWaitRecvEntryTime = __builtin_amdgcn_s_memrealtime();
+    }
+#endif
+
 #if defined(__HIP_PLATFORM_HCC__) || defined(__HCC__) || defined(__HIPCC__)
     union ncclLLFifoLine i4;
     do {
       i4.v[0] = __builtin_nontemporal_load(src->v);
       i4.v[1] = __builtin_nontemporal_load(src->v+1);
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+      npkitWaitRecvSpins++;
+#endif
       if (checkAbort(spins, 0)) break;
     } while ((i4.flag1 != flag) || (i4.flag2 != flag));
     uint64_t val64 = (uint64_t)(i4.data1) + (((uint64_t)i4.data2) << 32);
 #else
     do {
       asm("ld.volatile.global.v4.u32 {%0,%1,%2,%3}, [%4];" : "=r"(data1), "=r"(flag1), "=r"(data2), "=r"(flag2) : "l"(&src->i4));
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+      npkitWaitRecvSpins++;
+#endif
       if (checkAbort(spins, 0)) break;
     } while ((flag1 != flag) || (flag2 != flag));
     uint64_t val64 = data1 + (((uint64_t)data2) << 32);
 #endif
+
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+    if (tid == 0) {
+      npKitWaitRecvExitTime = __builtin_amdgcn_s_memrealtime();
+      npKitWaitRecvTotalTime += (npKitWaitRecvExitTime - npKitWaitRecvEntryTime) * (npkitWaitRecvSpins - 1) / npkitWaitRecvSpins;
+    }
+#endif
+
     return val64;
   }
 
@@ -144,16 +198,35 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
     union ncclLLFifoLine* src = recvPtr(i) + offset;
     uint32_t flag = recvFlag(i);
     int spins = 0;
+
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+    int npkitWaitRecvSpins = 0;
+    if (tid == 0) {
+      npKitWaitRecvEntryTime = __builtin_amdgcn_s_memrealtime();
+    }
+#endif
+
     do {
 #if defined(__HIP_PLATFORM_HCC__) || defined(__HCC__) || defined(__HIPCC__)
       line[i].v[0] = __builtin_nontemporal_load(src->v);
       line[i].v[1] = __builtin_nontemporal_load(src->v+1);
 #else
       asm("ld.volatile.global.v4.u32 {%0,%1,%2,%3}, [%4];" : "=r"(line[i].data1), "=r"(line[i].flag1), "=r"(line[i].data2), "=r"(line[i].flag2) : "l"(&src->i4));
+#endif
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+      npkitWaitRecvSpins++;
 #endif
       if (checkAbort(spins, 0)) break;
     } while(line[i].flag1 != flag || line[i].flag2 != flag);
     uint64_t val64 = line[i].data1 + (((uint64_t)line[i].data2) << 32);
+
+#if defined(ENABLE_NPKIT) && (defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT) || defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME))
+    if (tid == 0) {
+      npKitWaitRecvExitTime = __builtin_amdgcn_s_memrealtime();
+      npKitWaitRecvTotalTime += (npKitWaitRecvExitTime - npKitWaitRecvEntryTime) * (npkitWaitRecvSpins - 1) / npkitWaitRecvSpins;
+    }
+#endif
+
     return val64;
   }
 
@@ -296,6 +369,22 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
     nelem = nelem < 0 ? 0 : nelem;
     if (SEND) waitSend(divUp(nelem, EltPerLine)*sizeof(ncclLLFifoLine));
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT)
+    if (tid == 0) {
+      npKitWaitRecvTotalTime = 0;
+      npKitWaitRecvDataProcessSize = nelem*sizeof(T);
+      NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY,
+          npKitWaitRecvDataProcessSize, 0, __builtin_amdgcn_s_memrealtime(), ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+    if (tid == 0) {
+      npKitWaitRecvTotalTime = 0;
+      npKitDataProcessEntryTime = __builtin_amdgcn_s_memrealtime();
+    }
+#endif
+
     nelem -= tid*EltPerLine;
     srcElts += tid*EltPerLine;
     dstElts += tid*EltPerLine;
@@ -344,6 +433,21 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
       offset += nthreads;
     }
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+    if (tid == 0) {
+      npKitDataProcessExitTime = __builtin_amdgcn_s_memrealtime();
+      npKitDataProcessTotalTime += npKitDataProcessExitTime - npKitDataProcessEntryTime - npKitWaitRecvTotalTime;
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY) && defined(ENABLE_NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT,
+          npKitWaitRecvDataProcessSize, npKitWaitRecvTotalTime, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
     if (RECV) {
       for (int i=0; i < MaxRecv; i++) incRecv(i);
       postRecv();
@@ -430,28 +534,124 @@ class Primitives<T, RedOp, Fan, Direct, ProtoLL, P2p>:
   }
 
   __device__ void send(intptr_t inpIx, int eltN) {
-    return LLGenericOp<0, 1, Input, -1>(inpIx, -1, eltN, false);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<0, 1, Input, -1>(inpIx, -1, eltN, false);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void sendFromOutput(intptr_t outIx, int eltN) {
-    return LLGenericOp<0, 1, Output, -1>(outIx, -1, eltN, false);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_FROM_OUTPUT_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_FROM_OUTPUT_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<0, 1, Output, -1>(outIx, -1, eltN, false);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_FROM_OUTPUT_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_FROM_OUTPUT_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void recv(intptr_t outIx, int eltN, bool postOp=false) {
-    return LLGenericOp<1, 0, -1, Output>(-1, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<1, 0, -1, Output>(-1, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void recvReduceSend(intptr_t inpIx, int eltN) {
-    return LLGenericOp<1, 1, Input, -1>(inpIx, -1, eltN, false);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_REDUCE_SEND_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_REDUCE_SEND_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<1, 1, Input, -1>(inpIx, -1, eltN, false);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_REDUCE_SEND_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_REDUCE_SEND_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void recvReduceCopy(intptr_t inpIx, intptr_t outIx, int eltN, bool postOp=false) {
-    return LLGenericOp<1, 0, Input, Output>(inpIx, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_REDUCE_COPY_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_REDUCE_COPY_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<1, 0, Input, Output>(inpIx, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_REDUCE_COPY_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_REDUCE_COPY_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void copySend(intptr_t inpIx, intptr_t outIx, int eltN, bool postOp=false) {
-    return LLGenericOp<0, 1, Input, Output>(inpIx, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_COPY_SEND_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_COPY_SEND_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<0, 1, Input, Output>(inpIx, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_COPY_SEND_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_COPY_SEND_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void recvCopySend(intptr_t outIx, int eltN, bool postOp=false) {
-    return LLGenericOp<1, 1, -1, Output>(-1, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_COPY_SEND_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_COPY_SEND_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<1, 1, -1, Output>(-1, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_COPY_SEND_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_COPY_SEND_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void recvReduceCopySend(intptr_t inpIx, intptr_t outIx, int eltN, bool postOp=false) {
-    return LLGenericOp<1, 1, Input, Output>(inpIx, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_REDUCE_COPY_SEND_ENTRY)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_REDUCE_COPY_SEND_ENTRY, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+    LLGenericOp<1, 1, Input, Output>(inpIx, outIx, eltN, postOp);
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_RECV_REDUCE_COPY_SEND_EXIT)
+    if (tid == 0) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_RECV_REDUCE_COPY_SEND_EXIT, eltN*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
   }
   __device__ void recvSend(int eltN) {
     return LLGenericOp<1, 1, -1, -1>(-1, -1, eltN, false);
diff --git a/src/collectives/device/prims_simple.h b/src/collectives/device/prims_simple.h
index 45c8544fdb..cc6f275041 100644
--- a/src/collectives/device/prims_simple.h
+++ b/src/collectives/device/prims_simple.h
@@ -5,6 +5,10 @@
  * See LICENSE.txt for license information
  ************************************************************************/
 
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit.h"
+#endif
+
 template<typename T, typename RedOp, typename Fan, int Direct,
          int SlicePerChunk, int StepPerSlice, int Unroll, int P2p>
 class Primitives<
@@ -49,6 +53,15 @@ class Primitives<
   const uint64_t opCount;
   uint32_t* next_hdp_reg;
 
+#if defined(ENABLE_NPKIT)
+public:
+  int npKitCtxIdx = 0;
+  uint64_t npKitDataProcessEntryTime = 0;
+  uint64_t npKitDataProcessExitTime = 0;
+  uint64_t npKitDataProcessTotalTime = 0;
+private:
+#endif
+
   // Don't use barrier 0 as it's used by the final sync
   inline __device__ void barrier() {
 #if defined(__HIP_PLATFORM_HCC__) || defined(__HCC__) || defined(__HIPCC__)
@@ -206,21 +219,93 @@ class Primitives<
         if (DirectRecv && ncclShmem->groups[group].srcs[0] == ncclShmem->groups[group].dsts[0]) {
           // We can only have one direct receive. Since srcs[0] == dstPtr+offset, skip one copy
           if (Send) {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY)
+            if (tid == 0) {
+              NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY, sliceSize*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+                  ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+            }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+            if (tid == 0) {
+              npKitDataProcessEntryTime = __builtin_amdgcn_s_memrealtime();
+            }
+#endif
+
             // (1-Send) is only there to avoid compilation errors in case MaxSend=0 (and Send=0).
             ReduceOrCopyMulti<Unroll, RedOp, T, 1, 1, 1, (1-Send)+MaxSend, 0>
               (tid, nworkers, nullptr, false,
                1, (T const**)ncclShmem->groups[group].srcs,
                fan.nsend(), (T**)ncclShmem->groups[group].dsts+1,
                sliceSize);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+            if (tid == 0) {
+              npKitDataProcessExitTime = __builtin_amdgcn_s_memrealtime();
+              npKitDataProcessTotalTime += npKitDataProcessExitTime - npKitDataProcessEntryTime;
+            }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT)
+            if (tid == 0) {
+              NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT, sliceSize*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+                  ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+            }
+#endif
+
           }
         } else if (DirectSend && !DirectRecv && SrcBuf != Input && ncclShmem->groups[group].dsts[Dst] == nullptr) {
           // For broadcast in CollNet to do empty send
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY)
+          if (tid == 0) {
+            NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY, sliceSize*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+                ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+          }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+          if (tid == 0) {
+            npKitDataProcessEntryTime = __builtin_amdgcn_s_memrealtime();
+          }
+#endif
+
           ReduceOrCopyMulti<Unroll, RedOp, T, 1, 1, 1, 1, 0>
             (tid, nworkers, ncclShmem->redOpArgs, postOp,
              Recv, (T const**)ncclShmem->groups[group].srcs,
              Dst, (T**)ncclShmem->groups[group].dsts,
              sliceSize);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+          if (tid == 0) {
+            npKitDataProcessExitTime = __builtin_amdgcn_s_memrealtime();
+            npKitDataProcessTotalTime += npKitDataProcessExitTime - npKitDataProcessEntryTime;
+          }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT)
+          if (tid == 0) {
+            NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT, sliceSize*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+                ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+          }
+#endif
+
         } else {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY)
+          if (tid == 0) {
+            NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY, sliceSize*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+                ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+          }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+          if (tid == 0) {
+            npKitDataProcessEntryTime = __builtin_amdgcn_s_memrealtime();
+          }
+#endif
+
           constexpr int PreOpN = SrcBuf != Input ? 0 :
                                  DirectRecv*MaxRecv == NCCL_MAX_DIRECT_ARITY ? (1+NCCL_MAX_DIRECT_ARITY) : 1;
           ReduceOrCopyMulti<Unroll, RedOp, T, Recv+Src, Recv*MaxRecv+Src, Send+Dst, Send*MaxSend+Dst, PreOpN>
@@ -228,6 +313,21 @@ class Primitives<
              Recv*fan.nrecv()+Src, (T const**)ncclShmem->groups[group].srcs,
              Send*fan.nsend()+Dst, (T**)ncclShmem->groups[group].dsts,
              sliceSize);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME)
+          if (tid == 0) {
+            npKitDataProcessExitTime = __builtin_amdgcn_s_memrealtime();
+            npKitDataProcessTotalTime += npKitDataProcessExitTime - npKitDataProcessEntryTime;
+          }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT)
+          if (tid == 0) {
+            NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT, sliceSize*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+                ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+          }
+#endif
+
         }
         barrier(); // This barrier has a counterpart in following loop
 #if defined(__gfx1030__)
diff --git a/src/collectives/device/sendrecv.h b/src/collectives/device/sendrecv.h
index 28eef3ea59..fa906d2d65 100644
--- a/src/collectives/device/sendrecv.h
+++ b/src/collectives/device/sendrecv.h
@@ -8,14 +8,68 @@
 #include "devcomm.h"
 #include "collectives.h"
 #include "primitives.h"
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit.h"
+#endif
 
 template<typename T, typename RedOp>
 struct RunWork<ncclFuncSendRecv, T, RedOp, NCCL_ALGO_RING, NCCL_PROTO_SIMPLE> {
   __device__ __forceinline__ void runSend(const int tid, const int nthreads, const int group, struct ncclWorkElemP2p* args) {
+
+#if defined(ENABLE_NPKIT)
+    bool isNpKitThread = (tid == 0);
+    int npKitCtxIdx = blockIdx.x * NCCL_MAX_WORK_ELEMENTS_P2P;
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_CPU)
+    if (isNpKitThread) {
+      uint64_t* cpuTimestamp = ncclShmem->comm.cpuTimestamp;
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_CPU, 0, 0, *cpuTimestamp,
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_GPU)
+    if (isNpKitThread) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_GPU, 0, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
     if (args->peer == ncclShmem->comm.rank) {
       struct ncclWorkElemP2p* recvArgs = args-1;
       if (args->buff != recvArgs->buff) {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_RECV_LOCAL_COPY_ENTRY)
+        if (isNpKitThread) {
+          NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_RECV_LOCAL_COPY_ENTRY, args->count*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+              ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY)
+        if (isNpKitThread) {
+          NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY, args->count*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+              ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        }
+#endif
+
         ReduceOrCopyMulti<COLL_UNROLL, RedOp, T, 1, 1, 1, 1, 0>(tid, nthreads, nullptr, false, 1, (const T**)&args->buff, 1, (T**)&recvArgs->buff, args->count);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT)
+        if (isNpKitThread) {
+          NpKit::CollectGpuEvent(NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT, args->count*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+              ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_RECV_LOCAL_COPY_EXIT)
+        if (isNpKitThread) {
+          NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_RECV_LOCAL_COPY_EXIT, args->count*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+              ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        }
+#endif
+
       }
     } else {
       using Proto = ProtoSimple<1, 1>;
@@ -24,16 +78,59 @@ struct RunWork<ncclFuncSendRecv, T, RedOp, NCCL_ALGO_RING, NCCL_PROTO_SIMPLE> {
       int const peer = args->peer;
       Primitives<T, RedOp, FanAsymmetric<0, 1>, 0, Proto, 1> prims
         (tid, nthreads, nullptr, &peer, args->buff, nullptr, /*redOpArg(ignored)=*/0, group);
+
+#if defined(ENABLE_NPKIT)
+      if (isNpKitThread) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_RECV_SEND_ENTRY)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_RECV_SEND_ENTRY, count*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       ssize_t offset = 0;
       do {
         int nelem = min(chunkSize, count-offset);
         prims.directSend(offset, offset, nelem);
         offset += nelem;
       } while(offset < count);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_RECV_SEND_EXIT)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_RECV_SEND_EXIT, count*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
   }
 
   __device__ __forceinline__ void runRecv(const int tid, const int nthreads, const int group, struct ncclWorkElemP2p* args) {
+#if defined(ENABLE_NPKIT)
+    bool isNpKitThread = (tid == 0);
+    int npKitCtxIdx = blockIdx.x * NCCL_MAX_WORK_ELEMENTS_P2P + 1;
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_CPU)
+    if (isNpKitThread) {
+      uint64_t* cpuTimestamp = ncclShmem->comm.cpuTimestamp;
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_CPU, 0, 0, *cpuTimestamp,
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_TIME_SYNC_GPU)
+    if (isNpKitThread) {
+      NpKit::CollectGpuEvent(NPKIT_EVENT_TIME_SYNC_GPU, 0, 0, __builtin_amdgcn_s_memrealtime(),
+          ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+    }
+#endif
+
     if (args->peer != ncclShmem->comm.rank) {
       using Proto = ProtoSimple<1, 1>;
       ssize_t const count = args->count;
@@ -41,12 +138,35 @@ struct RunWork<ncclFuncSendRecv, T, RedOp, NCCL_ALGO_RING, NCCL_PROTO_SIMPLE> {
       int const peer = args->peer;
       Primitives<T, RedOp, FanAsymmetric<1, 0>, 0, Proto, 1> prims
         (tid, nthreads, &peer, nullptr, nullptr, args->buff, /*redOpArg(ignored)=*/0, group);
+
+#if defined(ENABLE_NPKIT)
+      if (isNpKitThread) {
+        prims.npKitCtxIdx = npKitCtxIdx;
+      }
+#endif
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_RECV_RECV_ENTRY)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_RECV_RECV_ENTRY, count*sizeof(T), 0, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+        prims.npKitDataProcessTotalTime = 0;
+      }
+#endif
+
       ssize_t offset = 0;
       do {
         int nelem = min(chunkSize, count-offset);
         prims.directRecv(offset, nelem);
         offset += nelem;
       } while(offset < count);
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_SEND_RECV_RECV_EXIT)
+      if (isNpKitThread) {
+        NpKit::CollectGpuEvent(NPKIT_EVENT_SEND_RECV_RECV_EXIT, count*sizeof(T), prims.npKitDataProcessTotalTime, __builtin_amdgcn_s_memrealtime(),
+            ncclShmem->comm.npKitEventCollectContexts + npKitCtxIdx);
+      }
+#endif
+
     }
   }
 
diff --git a/src/include/devcomm.h b/src/include/devcomm.h
index 0c7fb3dfbe..855923cfb1 100644
--- a/src/include/devcomm.h
+++ b/src/include/devcomm.h
@@ -11,6 +11,9 @@
 #include "nccl.h"
 #include "rccl_bfloat16.h"
 #include "align.h"
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit_struct.h"
+#endif
 #include <stdint.h>
 // [RCCL] Support for clique-based kernels
 //#include "clique/CliqueCommon.h"
@@ -419,6 +422,11 @@ struct ncclDevComm {
   // Channels, device side
   struct ncclChannel* channels;
 
+#if defined(ENABLE_NPKIT)
+  NpKitEventCollectContext* npKitEventCollectContexts;
+  uint64_t* cpuTimestamp;
+#endif
+
 #ifdef ENABLE_PROFILING
   // Profiling counters
   struct ncclProf devProf;
diff --git a/src/include/npkit/npkit.h b/src/include/npkit/npkit.h
new file mode 100644
index 0000000000..e12cf88ec1
--- /dev/null
+++ b/src/include/npkit/npkit.h
@@ -0,0 +1,65 @@
+#ifndef NPKIT_H_
+#define NPKIT_H_
+
+#include <string>
+#include <thread>
+
+#include <hip/hip_runtime.h>
+
+#include "npkit/npkit_event.h"
+#include "npkit/npkit_struct.h"
+
+class NpKit {
+ public:
+  static const uint64_t kNumGpuEventBuffers = 512;
+
+  static const uint64_t kNumCpuEventBuffers = 32;
+
+  static ncclResult_t Init(int rank);
+
+  static ncclResult_t Dump(const std::string& dump_dir);
+
+  static ncclResult_t Shutdown();
+
+  static NpKitEventCollectContext* GetGpuEventCollectContexts();
+
+  static inline __device__ void CollectGpuEvent(uint8_t type, uint32_t size, uint32_t rsvd, uint64_t timestamp,
+                                                NpKitEventCollectContext* ctx) {
+    uint64_t event_buffer_head = ctx->event_buffer_head;
+    if (event_buffer_head < kMaxNumGpuEventsPerBuffer) {
+      NpKitEvent& event = ctx->event_buffer[event_buffer_head];
+      event.fields.type = type;
+      event.fields.size = size;
+      event.fields.rsvd = rsvd;
+      event.fields.timestamp = timestamp;
+      ctx->event_buffer_head++;
+    }
+  }
+
+  static void CollectCpuEvent(uint8_t type, uint32_t size, uint32_t rsvd, uint64_t timestamp, int channel_id);
+
+  static uint64_t* GetCpuTimestamp();
+
+ private:
+  static void CpuTimestampUpdateThread();
+
+  // 64K * 512 * 16B = 512MB per GPU
+  static const uint64_t kMaxNumGpuEventsPerBuffer = 1ULL << 16;
+
+  // 64K * 2 (send/recv) * (512/32) = 2M, 2M * 32 * 16B = 1GB per CPU
+  static const uint64_t kMaxNumCpuEventsPerBuffer = 1ULL << 21;
+
+  static NpKitEvent** gpu_event_buffers_;
+  static NpKitEvent** cpu_event_buffers_;
+
+  static NpKitEventCollectContext* gpu_collect_contexts_;
+  static NpKitEventCollectContext* cpu_collect_contexts_;
+  static uint64_t* cpu_timestamp_;
+
+  static uint64_t rank_;
+
+  static std::thread* cpu_timestamp_update_thread_;
+  static volatile bool cpu_timestamp_update_thread_should_stop_;
+};
+
+#endif
diff --git a/src/include/npkit/npkit_event.h b/src/include/npkit/npkit_event.h
new file mode 100644
index 0000000000..b328fc9e55
--- /dev/null
+++ b/src/include/npkit/npkit_event.h
@@ -0,0 +1,98 @@
+#ifndef NPKIT_EVENT_H_
+#define NPKIT_EVENT_H_
+
+#define NPKIT_EVENT_INVALID                                     0x0
+
+#define NPKIT_EVENT_ALL_REDUCE_RING_ENTRY                       0x1
+#define NPKIT_EVENT_ALL_REDUCE_RING_EXIT                        0x2
+#define NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_ENTRY                0x3
+#define NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_EXIT                 0x4
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_ENTRY                 0x5
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_EXIT                  0x6
+
+#define NPKIT_EVENT_COPY_SEND_ENTRY                             0x7
+#define NPKIT_EVENT_COPY_SEND_EXIT                              0x8
+#define NPKIT_EVENT_DIRECT_COPY_SEND_ENTRY                      0x9
+#define NPKIT_EVENT_DIRECT_COPY_SEND_EXIT                       0xA
+#define NPKIT_EVENT_DIRECT_RECV_ENTRY                           0xB
+#define NPKIT_EVENT_DIRECT_RECV_EXIT                            0xC
+#define NPKIT_EVENT_DIRECT_RECV_COPY_SEND_ENTRY                 0xD
+#define NPKIT_EVENT_DIRECT_RECV_COPY_SEND_EXIT                  0xE
+#define NPKIT_EVENT_DIRECT_RECV_REDUCE_COPY_SEND_ENTRY          0xF
+#define NPKIT_EVENT_DIRECT_RECV_REDUCE_COPY_SEND_EXIT           0x10
+#define NPKIT_EVENT_DIRECT_SEND_ENTRY                           0x11
+#define NPKIT_EVENT_DIRECT_SEND_EXIT                            0x12
+#define NPKIT_EVENT_DIRECT_SEND_FROM_OUTPUT_ENTRY               0x13
+#define NPKIT_EVENT_DIRECT_SEND_FROM_OUTPUT_EXIT                0x14
+#define NPKIT_EVENT_RECV_ENTRY                                  0x15
+#define NPKIT_EVENT_RECV_EXIT                                   0x16
+#define NPKIT_EVENT_RECV_COPY_SEND_ENTRY                        0x17
+#define NPKIT_EVENT_RECV_COPY_SEND_EXIT                         0x18
+#define NPKIT_EVENT_RECV_REDUCE_COPY_ENTRY                      0x19
+#define NPKIT_EVENT_RECV_REDUCE_COPY_EXIT                       0x1A
+#define NPKIT_EVENT_RECV_REDUCE_COPY_SEND_ENTRY                 0x1B
+#define NPKIT_EVENT_RECV_REDUCE_COPY_SEND_EXIT                  0x1C
+#define NPKIT_EVENT_RECV_REDUCE_SEND_ENTRY                      0x1D
+#define NPKIT_EVENT_RECV_REDUCE_SEND_EXIT                       0x1E
+#define NPKIT_EVENT_SEND_ENTRY                                  0x1F
+#define NPKIT_EVENT_SEND_EXIT                                   0x20
+#define NPKIT_EVENT_SEND_FROM_OUTPUT_ENTRY                      0x21
+#define NPKIT_EVENT_SEND_FROM_OUTPUT_EXIT                       0x22
+
+#define NPKIT_EVENT_PRIM_SIMPLE_WAIT_PEER_ENTRY                 0x23
+#define NPKIT_EVENT_PRIM_SIMPLE_WAIT_PEER_EXIT                  0x24
+#define NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_ENTRY      0x25
+#define NPKIT_EVENT_PRIM_SIMPLE_REDUCE_OR_COPY_MULTI_EXIT       0x26
+
+#define NPKIT_EVENT_PRIM_LL_WAIT_SEND_ENTRY                     0x27
+#define NPKIT_EVENT_PRIM_LL_WAIT_SEND_EXIT                      0x28
+#define NPKIT_EVENT_PRIM_LL_DATA_PROCESS_ENTRY                  0x29
+#define NPKIT_EVENT_PRIM_LL_DATA_PROCESS_EXIT                   0x2A
+
+#define NPKIT_EVENT_PRIM_LL128_WAIT_SEND_ENTRY                  0x2B
+#define NPKIT_EVENT_PRIM_LL128_WAIT_SEND_EXIT                   0x2C
+#define NPKIT_EVENT_PRIM_LL128_DATA_PROCESS_ENTRY               0x2D
+#define NPKIT_EVENT_PRIM_LL128_DATA_PROCESS_EXIT                0x2E
+
+#define NPKIT_EVENT_NET_SEND_ENTRY                              0x2F
+#define NPKIT_EVENT_NET_SEND_EXIT                               0x30
+
+#define NPKIT_EVENT_NET_RECV_ENTRY                              0x31
+#define NPKIT_EVENT_NET_RECV_EXIT                               0x32
+
+#define NPKIT_EVENT_TIME_SYNC_GPU                               0x33
+#define NPKIT_EVENT_TIME_SYNC_CPU                               0x34
+
+#define NPKIT_EVENT_ALL_REDUCE_RING_SEND_ENTRY                  0x35
+#define NPKIT_EVENT_ALL_REDUCE_RING_SEND_EXIT                   0x36
+#define NPKIT_EVENT_ALL_REDUCE_RING_RECV_REDUCE_SEND_ENTRY      0x37
+#define NPKIT_EVENT_ALL_REDUCE_RING_RECV_REDUCE_SEND_EXIT       0x38
+#define NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_REDUCE_COPY_SEND_ENTRY  0x39
+#define NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_REDUCE_COPY_SEND_EXIT   0x3A
+#define NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_COPY_SEND_ENTRY 0x3B
+#define NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_COPY_SEND_EXIT  0x3C
+#define NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_ENTRY           0x3D
+#define NPKIT_EVENT_ALL_REDUCE_RING_DIRECT_RECV_EXIT            0x3E
+
+#define NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_REDUCE_ENTRY         0x3F
+#define NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_REDUCE_EXIT          0x40
+#define NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_BROADCAST_ENTRY      0x41
+#define NPKIT_EVENT_ALL_REDUCE_TREE_UPDOWN_BROADCAST_EXIT       0x42
+
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_BROADCAST_ENTRY    0x43
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_BROADCAST_EXIT     0x44
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_ENTRY          0x45
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_REDUCE_EXIT           0x46
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_BROADCAST_ENTRY       0x47
+#define NPKIT_EVENT_ALL_REDUCE_TREE_SPLIT_BROADCAST_EXIT        0x48
+
+#define NPKIT_EVENT_SEND_RECV_LOCAL_COPY_ENTRY                  0x49
+#define NPKIT_EVENT_SEND_RECV_LOCAL_COPY_EXIT                   0x4A
+#define NPKIT_EVENT_SEND_RECV_SEND_ENTRY                        0x4B
+#define NPKIT_EVENT_SEND_RECV_SEND_EXIT                         0x4C
+#define NPKIT_EVENT_SEND_RECV_RECV_ENTRY                        0x4D
+#define NPKIT_EVENT_SEND_RECV_RECV_EXIT                         0x4E
+
+#define NPKIT_PRIM_COLLECT_DATA_PROCESS_TIME                    0x4F
+
+#endif
diff --git a/src/include/npkit/npkit_struct.h b/src/include/npkit/npkit_struct.h
new file mode 100644
index 0000000000..89dadcb4e4
--- /dev/null
+++ b/src/include/npkit/npkit_struct.h
@@ -0,0 +1,25 @@
+#ifndef NPKIT_STRUCT_H_
+#define NPKIT_STRUCT_H_
+
+#include <cstdint>
+
+#pragma pack(push, 1)
+
+union NpKitEvent {
+  uint64_t bits[2];
+  struct {
+    uint64_t type : 8;
+    uint64_t size : 32;
+    uint64_t rsvd : 24;
+    uint64_t timestamp;
+  } fields;
+};
+
+struct NpKitEventCollectContext {
+  NpKitEvent* event_buffer;
+  uint64_t event_buffer_head;
+};
+
+#pragma pack(pop)
+
+#endif
diff --git a/src/include/proxy.h b/src/include/proxy.h
index 1cf88d7b1c..f3c59ec9ba 100644
--- a/src/include/proxy.h
+++ b/src/include/proxy.h
@@ -58,6 +58,10 @@ struct ncclProxySubArgs {
   uint64_t end;
   void* requests[NCCL_STEPS];
   void* profilingEvents[NCCL_STEPS];
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_SEND_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_SEND_EXIT)
+  int npKitSizesFifo[NCCL_STEPS];
+#endif
 };
 
 struct ncclProxyArgs {
diff --git a/src/init.cc b/src/init.cc
index 9e2fd2dcf8..bd20ec1519 100644
--- a/src/init.cc
+++ b/src/init.cc
@@ -17,6 +17,9 @@
 #include "enqueue.h"
 #include "graph.h"
 #include "argcheck.h"
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit.h"
+#endif
 #include <fcntl.h>
 #include <unistd.h>
 #include <hip/hip_runtime.h>
@@ -501,6 +504,13 @@ static ncclResult_t devCommSetup(ncclComm_t comm) {
     NCCLCHECK(ncclCudaMemcpy(comm->channels[r].ring.devUserRanks, comm->channels[r].ring.userRanks, comm->nRanks));
   }
 
+#if defined(ENABLE_NPKIT)
+  // Init NPKit
+  NCCLCHECK(NpKit::Init(comm->rank));
+  comm->hostDevComm.npKitEventCollectContexts = NpKit::GetGpuEventCollectContexts();
+  comm->hostDevComm.cpuTimestamp = NpKit::GetCpuTimestamp();
+#endif
+
   // Duplicate the dev comm on the device
   NCCLCHECK(ncclCudaMemcpy(comm->devComm, &comm->hostDevComm, 1));
   return ncclSuccess;
@@ -1399,6 +1409,17 @@ static ncclResult_t commDestroy(ncclComm_t comm) {
   if (savedDevice != commDevice)
     CUDACHECK(hipSetDevice(savedDevice));
 
+#if defined(ENABLE_NPKIT)
+  // Dump NPKit events and shutdown
+  const char* npkitDumpDir = getenv("NPKIT_DUMP_DIR");
+  if (npkitDumpDir == nullptr) {
+    WARN("NPKIT_DUMP_DIR is empty");
+  } else {
+    NCCLCHECK(NpKit::Dump(npkitDumpDir));
+  }
+  NCCLCHECK(NpKit::Shutdown());
+#endif
+
   return ncclSuccess;
 }
 
diff --git a/src/misc/npkit.cc b/src/misc/npkit.cc
new file mode 100644
index 0000000000..89122fd495
--- /dev/null
+++ b/src/misc/npkit.cc
@@ -0,0 +1,169 @@
+#include <chrono>
+#include <fstream>
+#include <unistd.h>
+
+#include "alloc.h"
+#include "npkit/npkit.h"
+
+uint64_t NpKit::rank_ = 0;
+
+NpKitEvent** NpKit::gpu_event_buffers_ = nullptr;
+NpKitEvent** NpKit::cpu_event_buffers_ = nullptr;
+
+NpKitEventCollectContext* NpKit::gpu_collect_contexts_ = nullptr;
+NpKitEventCollectContext* NpKit::cpu_collect_contexts_ = nullptr;
+uint64_t* NpKit::cpu_timestamp_ = nullptr;
+
+std::thread* NpKit::cpu_timestamp_update_thread_ = nullptr;
+volatile bool NpKit::cpu_timestamp_update_thread_should_stop_ = false;
+
+void NpKit::CpuTimestampUpdateThread() {
+  uint64_t init_system_clock = std::chrono::system_clock::now().time_since_epoch().count();
+  uint64_t init_steady_clock = std::chrono::steady_clock::now().time_since_epoch().count();
+  uint64_t curr_steady_clock = 0;
+  volatile uint64_t* volatile_cpu_timestamp_ = cpu_timestamp_;
+  while (!cpu_timestamp_update_thread_should_stop_) {
+    curr_steady_clock = std::chrono::steady_clock::now().time_since_epoch().count();
+    *volatile_cpu_timestamp_ = init_system_clock + (curr_steady_clock - init_steady_clock);
+  }
+}
+
+ncclResult_t NpKit::Init(int rank) {
+  uint64_t i = 0;
+  NpKitEventCollectContext ctx;
+  ctx.event_buffer_head = 0;
+  rank_ = rank;
+
+  // Init event data structures
+  NCCLCHECK(ncclCalloc(&gpu_event_buffers_, kNumGpuEventBuffers));
+  NCCLCHECK(ncclCudaCalloc(&gpu_collect_contexts_, kNumGpuEventBuffers));
+  for (i = 0; i < kNumGpuEventBuffers; i++) {
+    NCCLCHECK(ncclCudaCalloc(gpu_event_buffers_ + i, kMaxNumGpuEventsPerBuffer));
+    ctx.event_buffer = gpu_event_buffers_[i];
+    NCCLCHECK(ncclCudaMemcpy(gpu_collect_contexts_ + i, &ctx, 1));
+  }
+
+  NCCLCHECK(ncclCalloc(&cpu_event_buffers_, kNumCpuEventBuffers));
+  NCCLCHECK(ncclCalloc(&cpu_collect_contexts_, kNumCpuEventBuffers));
+  for (i = 0; i < kNumCpuEventBuffers; i++) {
+    NCCLCHECK(ncclCalloc(cpu_event_buffers_ + i, kMaxNumCpuEventsPerBuffer));
+    ctx.event_buffer = cpu_event_buffers_[i];
+    cpu_collect_contexts_[i] = ctx;
+  }
+
+  // Init timestamp
+  NCCLCHECK(ncclCudaHostCalloc(&cpu_timestamp_, 1));
+  cpu_timestamp_update_thread_should_stop_ = false;
+  cpu_timestamp_update_thread_ = new std::thread(CpuTimestampUpdateThread);
+
+  return ncclSuccess;
+}
+
+ncclResult_t NpKit::Dump(const std::string& dump_dir) {
+  uint64_t i = 0;
+  std::string dump_file_path;
+
+  // Dump CPU events
+  for (i = 0; i < kNumCpuEventBuffers; i++) {
+    dump_file_path = dump_dir;
+    dump_file_path += "/cpu_events_rank_";
+    dump_file_path += std::to_string(rank_);
+    dump_file_path += "_channel_";
+    dump_file_path += std::to_string(i);
+    auto cpu_trace_file = std::fstream(dump_file_path, std::ios::out | std::ios::binary);
+    cpu_trace_file.write(reinterpret_cast<char*>(cpu_event_buffers_[i]),
+        cpu_collect_contexts_[i].event_buffer_head * sizeof(NpKitEvent));
+    cpu_trace_file.close();
+  }
+
+  // Dump CPU clock info
+  dump_file_path = dump_dir;
+  dump_file_path += "/cpu_clock_period_num_rank_";
+  dump_file_path += std::to_string(rank_);
+  std::string clock_period_num_str = std::to_string(std::chrono::steady_clock::duration::period::num);
+  auto clock_period_num_file = std::fstream(dump_file_path, std::ios::out);
+  clock_period_num_file.write(clock_period_num_str.c_str(), clock_period_num_str.length());
+  clock_period_num_file.close();
+
+  dump_file_path = dump_dir;
+  dump_file_path += "/cpu_clock_period_den_rank_";
+  dump_file_path += std::to_string(rank_);
+  std::string clock_period_den_str = std::to_string(std::chrono::steady_clock::duration::period::den);
+  auto clock_period_den_file = std::fstream(dump_file_path, std::ios::out);
+  clock_period_den_file.write(clock_period_den_str.c_str(), clock_period_den_str.length());
+  clock_period_den_file.close();
+
+  // Dump GPU events, reuse CPU struct
+  for (i = 0; i < kNumGpuEventBuffers; i++) {
+    dump_file_path = dump_dir;
+    dump_file_path += "/gpu_events_rank_";
+    dump_file_path += std::to_string(rank_);
+    dump_file_path += "_buf_";
+    dump_file_path += std::to_string(i);
+    NCCLCHECK(ncclCudaMemcpy(cpu_event_buffers_[0], gpu_event_buffers_[i], kMaxNumGpuEventsPerBuffer));
+    NCCLCHECK(ncclCudaMemcpy(cpu_collect_contexts_, gpu_collect_contexts_ + i, 1));
+    auto gpu_trace_file = std::fstream(dump_file_path, std::ios::out | std::ios::binary);
+    gpu_trace_file.write(reinterpret_cast<char*>(cpu_event_buffers_[0]),
+        cpu_collect_contexts_[0].event_buffer_head * sizeof(NpKitEvent));
+    gpu_trace_file.close();
+  }
+
+  // Dump GPU clockRate
+  dump_file_path = dump_dir;
+  dump_file_path += "/gpu_clock_rate_rank_";
+  dump_file_path += std::to_string(rank_);
+  constexpr int vega_gpu_rtc_freq_in_khz = 25000;
+  std::string clock_rate_str = std::to_string(vega_gpu_rtc_freq_in_khz);
+  auto gpu_clock_rate_file = std::fstream(dump_file_path, std::ios::out);
+  gpu_clock_rate_file.write(clock_rate_str.c_str(), clock_rate_str.length());
+  gpu_clock_rate_file.close();
+
+  return ncclSuccess;
+}
+
+ncclResult_t NpKit::Shutdown() {
+  uint64_t i = 0;
+
+  // Stop CPU timestamp updating thread
+  cpu_timestamp_update_thread_should_stop_ = true;
+  cpu_timestamp_update_thread_->join();
+
+  // Free CPU event data structures
+  for (i = 0; i < kNumCpuEventBuffers; i++) {
+    free(cpu_event_buffers_[i]);
+  }
+  free(cpu_event_buffers_);
+  free(cpu_collect_contexts_);
+
+  // Free GPU event data structures
+  for (i = 0; i < kNumGpuEventBuffers; i++) {
+    CUDACHECK(hipFree(gpu_event_buffers_[i]));
+  }
+  free(gpu_event_buffers_);
+  CUDACHECK(hipFree(gpu_collect_contexts_));
+
+  // Free timestamp
+  NCCLCHECK(ncclCudaHostFree(cpu_timestamp_));
+
+  return ncclSuccess;
+}
+
+NpKitEventCollectContext* NpKit::GetGpuEventCollectContexts() {
+  return gpu_collect_contexts_;
+}
+
+void NpKit::CollectCpuEvent(uint8_t type, uint32_t size, uint32_t rsvd, uint64_t timestamp, int channel_id) {
+  uint64_t event_buffer_head = cpu_collect_contexts_[channel_id].event_buffer_head;
+  if (event_buffer_head < kMaxNumCpuEventsPerBuffer) {
+    NpKitEvent& event = cpu_collect_contexts_[channel_id].event_buffer[event_buffer_head];
+    event.fields.type = type;
+    event.fields.size = size;
+    event.fields.rsvd = rsvd;
+    event.fields.timestamp = timestamp;
+    cpu_collect_contexts_[channel_id].event_buffer_head++;
+  }
+}
+
+uint64_t* NpKit::GetCpuTimestamp() {
+  return cpu_timestamp_;
+}
diff --git a/src/transport/net.cc b/src/transport/net.cc
index b7b8b753b4..2867e35452 100644
--- a/src/transport/net.cc
+++ b/src/transport/net.cc
@@ -14,6 +14,9 @@
 #include "gdrwrap.h"
 #include "shm.h"
 #include "profiler.h"
+#if defined(ENABLE_NPKIT)
+#include "npkit/npkit.h"
+#endif
 
 static_assert(sizeof(ncclNetHandle_t) <= CONNECT_SIZE, "NET Connect info is too large");
 
@@ -777,7 +780,16 @@ static ncclResult_t recvProxyFree(struct ncclProxyConnection* connection, struct
 
 static_assert(NCCL_STEPS <= NCCL_NET_MAX_REQUESTS, "Not enough net requests to cover for steps");
 
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+static int g_npkit_net_poll_cnt = 0;
+#endif
+
 static ncclResult_t sendProxyProgress(struct ncclComm* comm, struct ncclProxyArgs* args) {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+  g_npkit_net_poll_cnt++;
+#endif
+
   if (args->state == ncclProxyOpReady) {
     for (int s=0; s<args->nsubs; s++) {
       struct ncclProxySubArgs* sub = args->subs+s;
@@ -831,6 +843,11 @@ static ncclResult_t sendProxyProgress(struct ncclComm* comm, struct ncclProxyArg
         if (sizesFifo[buffSlot] != -1 && ((*recvTail > (sub->base+sub->transmitted)) || p == NCCL_PROTO_LL)) {
           // We have something to receive, let's check if it's completely ready.
           int size = sizesFifo[buffSlot];
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_SEND_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_SEND_EXIT)
+          sub->npKitSizesFifo[buffSlot] = size;
+#endif
+
           char* buff = resources->shared ? localBuff+resources->recvMem->offsFifo[buffSlot] : localBuff+buffSlot*stepSize;
           int ready = 1;
           if (p == NCCL_PROTO_LL128) {
@@ -865,6 +882,22 @@ static ncclResult_t sendProxyProgress(struct ncclComm* comm, struct ncclProxyArg
             // Data is ready, try to send.
             NCCLCHECK(ncclNetIsend(resources->netSendComm, buff, size, resources->rank, mhandle, sub->requests+buffSlot));
             if (sub->requests[buffSlot] != NULL) {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_SEND_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_SEND_EXIT)
+              NpKit::CollectCpuEvent(
+                  NPKIT_EVENT_NET_SEND_ENTRY,
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+                  g_npkit_net_poll_cnt,
+#else
+                  size,
+#endif
+                  uint64_t(sub->requests+buffSlot)/sizeof(void*),
+                  *(volatile uint64_t*)NpKit::GetCpuTimestamp(), sub->channelId);
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+              g_npkit_net_poll_cnt = 0;
+#endif
+#endif
+
               TRACE(NCCL_NET, "sendProxy [%ld/%d] Isend posted, req %p", sub->transmitted, buffSlot, sub->requests[buffSlot]);
               sizesFifo[buffSlot] = -1;
               // Make sure size is reset to zero before we update the head.
@@ -883,6 +916,22 @@ static ncclResult_t sendProxyProgress(struct ncclComm* comm, struct ncclProxyArg
         int buffSlot = (sub->base+sub->done)%NCCL_STEPS;
         NCCLCHECK(ncclNetTest(sub->requests[buffSlot], &done, NULL));
         if (done) {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_SEND_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_SEND_EXIT)
+          NpKit::CollectCpuEvent(
+              NPKIT_EVENT_NET_SEND_EXIT,
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+              g_npkit_net_poll_cnt,
+#else
+              sub->npKitSizesFifo[buffSlot],
+#endif
+              uint64_t(sub->requests+buffSlot)/sizeof(void*),
+              *(volatile uint64_t*)NpKit::GetCpuTimestamp(), sub->channelId);
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+          g_npkit_net_poll_cnt = 0;
+#endif
+#endif
+
           TRACE(NCCL_NET, "sendProxy [%ld/%d] request %p done", sub->done, buffSlot, sub->requests[buffSlot]);
           sub->done += args->sliceSteps;
           for (uint64_t step=sub->done-args->sliceSteps; step<sub->done; step++) ncclProfilingRecord(args, s, step, ncclProxyProfileEnd);
@@ -908,6 +957,11 @@ static ncclResult_t sendProxyProgress(struct ncclComm* comm, struct ncclProxyArg
 }
 
 static ncclResult_t recvProxyProgress(struct ncclComm* comm, struct ncclProxyArgs* args) {
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+  g_npkit_net_poll_cnt++;
+#endif
+
   if (args->state == ncclProxyOpReady) {
     // Initialize subs and group them by same recvComm.
     void* recvComm;
@@ -989,6 +1043,22 @@ static ncclResult_t recvProxyProgress(struct ncclComm* comm, struct ncclProxyArg
         if (*requestPtr) {
           for (int i=0; i<subGroup->groupSize; i++) {
             struct ncclProxySubArgs* sub = subGroup+i;
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_RECV_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_RECV_EXIT)
+            NpKit::CollectCpuEvent(
+                NPKIT_EVENT_NET_RECV_ENTRY,
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+                g_npkit_net_poll_cnt,
+#else
+                sizes[i],
+#endif
+                uint64_t(sub->requests+(step%NCCL_STEPS))/sizeof(void*),
+                *(volatile uint64_t*)NpKit::GetCpuTimestamp(), sub->channelId);
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+            g_npkit_net_poll_cnt = 0;
+#endif
+#endif
+
             sub->posted += args->sliceSteps;
             for (uint64_t step=sub->posted-args->sliceSteps; step<sub->posted; step++) ncclProfilingRecord(args, s+i, step, ncclProxyProfileRecvWait);
           }
@@ -1014,6 +1084,22 @@ static ncclResult_t recvProxyProgress(struct ncclComm* comm, struct ncclProxyArg
           for (int i=0; i<NCCL_PROXY_MAX_SUBS; i++) totalSize += sizes[i];
           for (int i=0; i<subGroup->groupSize; i++) {
             struct ncclProxySubArgs* sub = subGroup + i;
+
+#if defined(ENABLE_NPKIT) && defined(ENABLE_NPKIT_EVENT_NET_RECV_ENTRY) && defined(ENABLE_NPKIT_EVENT_NET_RECV_EXIT)
+            NpKit::CollectCpuEvent(
+                NPKIT_EVENT_NET_RECV_EXIT,
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+                g_npkit_net_poll_cnt,
+#else
+                sizes[i],
+#endif
+                uint64_t(sub->requests+(step%NCCL_STEPS))/sizeof(void*),
+                *(volatile uint64_t*)NpKit::GetCpuTimestamp(), sub->channelId);
+#if defined(ENABLE_NPKIT_NET_COLLECT_POLL_CNT)
+            g_npkit_net_poll_cnt = 0;
+#endif
+#endif
+
             sub->received += args->sliceSteps;
             for (uint64_t step=sub->received-args->sliceSteps; step<sub->received; step++) ncclProfilingRecord(args, s+i, step, ncclProxyProfileRecvFlushWait);
             if (step < sub->nsteps) {