diff --git a/projects/rccl-tests/src/Makefile b/projects/rccl-tests/src/Makefile
index ac317eb26b..5b7ffa965c 100644
--- a/projects/rccl-tests/src/Makefile
+++ b/projects/rccl-tests/src/Makefile
@@ -54,7 +54,7 @@ HIPLDFLAGS   += $(LIBRARIES:%=-l%)
 DST_DIR := $(BUILDDIR)
 SRC_FILES := $(wildcard *.cu)
 OBJ_FILES := $(SRC_FILES:%.cu=${DST_DIR}/%.o)
-BIN_FILES_LIST := all_reduce all_gather broadcast reduce_scatter reduce alltoall gather scatter sendrecv
+BIN_FILES_LIST := all_reduce all_gather broadcast reduce_scatter reduce alltoall gather scatter sendrecv alltoallv
 BIN_FILES := $(BIN_FILES_LIST:%=${DST_DIR}/%_perf)
 
 build: ${BIN_FILES}
diff --git a/projects/rccl-tests/src/alltoallv.cu b/projects/rccl-tests/src/alltoallv.cu
new file mode 100644
index 0000000000..7993059441
--- /dev/null
+++ b/projects/rccl-tests/src/alltoallv.cu
@@ -0,0 +1,190 @@
+/*************************************************************************
+ * Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved.
+ * Modifications Copyright (c) 2019 Advanced Micro Devices, Inc. All rights reserved.
+ *
+ * See LICENSE.txt for license information
+ ************************************************************************/
+
+#include <hip/hip_runtime.h>
+#include "common.h"
+
+#define USE_RCCL_GATHER_SCATTER
+
+void print_header() {
+  PRINT("# %10s  %12s  %6s  %6s            out-of-place                       in-place          \n", "", "", "", "");
+  PRINT("# %10s  %12s  %6s  %6s  %7s  %6s  %6s  %5s  %7s  %6s  %6s  %5s\n", "size", "count", "type", "redop",
+        "time", "algbw", "busbw", "error", "time", "algbw", "busbw", "error");
+  PRINT("# %10s  %12s  %6s  %6s  %7s  %6s  %6s  %5s  %7s  %6s  %6s  %5s\n", "(B)", "(elements)", "", "",
+        "(us)", "(GB/s)", "(GB/s)", "", "(us)", "(GB/s)", "(GB/s)", "");
+}
+
+void print_line_header (size_t size, size_t count, const char *typeName, const char *opName, int root) {
+  PRINT("%12li  %12li  %6s  %6s", size, count, typeName, opName);
+}
+
+void AlltoAllvGetCollByteCount(size_t *sendcount, size_t *recvcount, size_t *paramcount, size_t *sendInplaceOffset, size_t *recvInplaceOffset, size_t count, int nranks) {
+  if (count < nranks*nranks/2) {
+    *sendcount = 0;
+    *recvcount = 0;
+    *sendInplaceOffset = 0;
+    *recvInplaceOffset = 0;
+    *paramcount = 0;
+  } else {
+    *sendcount = (count/nranks)*nranks;
+    *recvcount = (count/nranks)*nranks;
+    *sendInplaceOffset = 0;
+    *recvInplaceOffset = 0;
+    *paramcount = count/nranks;
+  }
+}
+
+testResult_t AlltoAllvInitData(struct threadArgs* args, ncclDataType_t type, ncclRedOp_t op, int root, int rep, int in_place) {
+  size_t sendcount = args->sendBytes / wordSize(type);
+  size_t recvcount = args->expectedBytes / wordSize(type);
+  int nranks = args->nProcs*args->nThreads*args->nGpus;
+
+  for (int i=0; i<args->nGpus; i++) {
+    char* str = getenv("NCCL_TESTS_DEVICE");
+    int gpuid = str ? atoi(str) : args->localRank*args->nThreads*args->nGpus + args->thread*args->nGpus + i;
+    HIPCHECK(hipSetDevice(gpuid));
+    int rank = ((args->proc*args->nThreads + args->thread)*args->nGpus + i);
+    HIPCHECK(hipMemset(args->recvbuffs[i], 0, args->expectedBytes));
+    void* data = in_place ? args->recvbuffs[i] : args->sendbuffs[i];
+    TESTCHECK(InitData(data, sendcount, type, rep, rank));
+#if 0
+    int *dataHost = (int *)malloc(args->sendBytes);
+    hipMemcpy(dataHost, data, args->sendBytes, hipMemcpyDeviceToHost);
+    printf(" Rank [%d] Original: ", rank);
+    for(int j=0; j<sendcount; j++) {
+      printf("%d:%d ", j, dataHost[j]);
+    }
+    printf("\n");
+    free(dataHost);
+#endif
+    size_t rdisp = 0;
+    size_t data_count = sendcount*2/nranks;
+    size_t chunksize = data_count/nranks;
+    for (int j=0; j<nranks; j++) {
+      size_t scount = 0, rcount = ((j+rank)%nranks)*chunksize;
+      if (j+rank == nranks-1)
+          rcount += (sendcount-chunksize*(nranks-1)*nranks/2);
+      size_t sdisp = 0;
+      for (int k=0; k<nranks; k++) {
+        scount = ((k+j)%nranks)*chunksize;
+        if (k+j == nranks-1)
+          scount += (sendcount-chunksize*(nranks-1)*nranks/2);
+        if (k == rank)
+          break;
+        sdisp += scount;
+      }
+      TESTCHECK(InitData(((char*)args->expected[i])+rdisp*wordSize(type), rcount, type, rep+sdisp, j));
+      rdisp += rcount;
+    }
+    HIPCHECK(hipDeviceSynchronize());
+  }
+  // We don't support in-place alltoall
+  args->reportErrors = in_place ? 0 : 1;
+  return testSuccess;
+}
+
+void AlltoAllvGetBw(size_t count, int typesize, double sec, double* algBw, double* busBw, int nranks) {
+  double baseBw = (double)(count * nranks * typesize) / 1.0E9 / sec;
+
+  *algBw = baseBw;
+  double factor = ((double)(nranks-1))/((double)(nranks));
+  *busBw = baseBw * factor;
+}
+
+testResult_t AlltoAllvRunColl(void* sendbuff, void* recvbuff, size_t count, ncclDataType_t type, ncclRedOp_t op, int root, ncclComm_t comm, hipStream_t stream) {
+  int nranks;
+  NCCLCHECK(ncclCommCount(comm, &nranks));
+  int rank;
+  NCCLCHECK(ncclCommUserRank(comm, &rank));
+  #define MAX_ALLTOALLV_RANKS 256
+  static size_t sendcounts[MAX_ALLTOALLV_RANKS], recvcounts[MAX_ALLTOALLV_RANKS], sdispls[MAX_ALLTOALLV_RANKS], rdispls[MAX_ALLTOALLV_RANKS];
+  if (count == 0) return testSuccess;
+  if (nranks > MAX_ALLTOALLV_RANKS) {
+    printf("Number of ranks %d exceeds limit %d\n", nranks, MAX_ALLTOALLV_RANKS);
+    return testNcclError;
+  }
+
+  size_t disp = 0;
+  size_t chunksize = count*2/nranks;
+  for (int i = 0; i < nranks; i++) {
+      size_t scount = ((i+rank)%nranks)*chunksize;
+      if (i+rank == nranks-1)
+          scount += (count*nranks-chunksize*(nranks-1)*nranks/2);
+      sendcounts[i] = recvcounts[i] = scount;
+      sdispls[i] = rdispls[i] = disp;
+      disp += scount;
+  }
+
+#if NCCL_MAJOR < 2 || NCCL_MINOR < 7
+  printf("NCCL 2.7 or later is needed for alltoallv. This test was compiled with %d.%d.\n", NCCL_MAJOR, NCCL_MINOR);
+  return testNcclError;
+#else
+  NCCLCHECK(ncclGroupStart());
+  for (int r=0; r<nranks; r++) {
+    if (sendcounts[r] != 0) {
+      NCCLCHECK(ncclSend(
+          ((char*)sendbuff) + sdispls[r] * wordSize(type),
+          sendcounts[r],
+          type,
+          r,
+          comm,
+          stream));
+    }
+    if (recvcounts[r] != 0) {
+      NCCLCHECK(ncclRecv(
+          ((char*)recvbuff) + rdispls[r] * wordSize(type),
+          recvcounts[r],
+          type,
+          r,
+          comm,
+          stream));
+    }
+  }
+  NCCLCHECK(ncclGroupEnd());
+  return testSuccess;
+#endif
+}
+
+struct testColl alltoAllTest = {
+  "AlltoAllv",
+  AlltoAllvGetCollByteCount,
+  AlltoAllvInitData,
+  AlltoAllvGetBw,
+  AlltoAllvRunColl
+};
+
+void AlltoAllvGetBuffSize(size_t *sendcount, size_t *recvcount, size_t count, int nranks) {
+  size_t paramcount, sendInplaceOffset, recvInplaceOffset;
+  AlltoAllvGetCollByteCount(sendcount, recvcount, &paramcount, &sendInplaceOffset, &recvInplaceOffset, count, nranks);
+}
+
+testResult_t AlltoAllvRunTest(struct threadArgs* args, int root, ncclDataType_t type, const char* typeName, ncclRedOp_t op, const char* opName) {
+  args->collTest = &alltoAllTest;
+  ncclDataType_t *run_types;
+  const char **run_typenames;
+  int type_count;
+
+  if ((int)type != -1) {
+    type_count = 1;
+    run_types = &type;
+    run_typenames = &typeName;
+  } else {
+    type_count = ncclNumTypes;
+    run_types = test_types;
+    run_typenames = test_typenames;
+  }
+
+  for (int i=0; i<type_count; i++) {
+      TESTCHECK(TimeTest(args, run_types[i], run_typenames[i], (ncclRedOp_t)0, "", -1));
+  }
+  return testSuccess;
+}
+
+struct testEngine ncclTestEngine = {
+  AlltoAllvGetBuffSize,
+  AlltoAllvRunTest
+};
diff --git a/projects/rccl-tests/src/common.cu b/projects/rccl-tests/src/common.cu
index e1fb769c95..23d884cb9b 100644
--- a/projects/rccl-tests/src/common.cu
+++ b/projects/rccl-tests/src/common.cu
@@ -128,7 +128,7 @@ void deltaKern(void* A_, void* B_, size_t count, double* max) {
     double delta = absDiff(A[i], B[i]);
     if( delta > locmax ) {
       locmax = delta;
-#ifdef DEBUG_PRINT
+#if 0
       if (delta > .1) printf("Error at %d/%ld : %f != %f\n", i, count, toFloat(A[i]), toFloat(B[i]));
 #endif
     }
@@ -339,23 +339,30 @@ testResult_t CheckData(struct threadArgs* args, ncclDataType_t type, ncclRedOp_t
 
 #ifdef DEBUG_PRINT
     //if (rank == 0) {
-       int *expectedHost = (int *)malloc(args->expectedBytes);
-       int *dataHost = (int *)malloc(args->expectedBytes);
+      int *expectedHost = (int *)malloc(args->expectedBytes);
+      int *dataHost = (int *)malloc(args->expectedBytes);
 
-       hipMemcpy(expectedHost, args->expected[rank], args->expectedBytes, hipMemcpyDeviceToHost);
-       printf("\n Rank [%d] Expected: ", rank);
-       for(int j=0; j<args->expectedBytes/sizeof(int); j++) {
-         printf("%d:%d ", j, expectedHost[j]);
-       }
-       hipMemcpy(dataHost, data, args->expectedBytes, hipMemcpyDeviceToHost);
-       printf("\n Rank [%d] Actual: ", rank);
-       for (int j=0; j<args->expectedBytes/sizeof(int); j++) {
-         printf("%d:%d ", j, dataHost[j]);
-       }
-       printf("\n");
-       free(expectedHost);
-       free(dataHost);
-    }
+      hipMemcpy(expectedHost, args->expected[rank], args->expectedBytes, hipMemcpyDeviceToHost);
+      hipMemcpy(dataHost, data, args->expectedBytes, hipMemcpyDeviceToHost);
+      int j, k, l;
+      for (j=0; j<args->expectedBytes/sizeof(int); j++)
+        if (expectedHost[j] != dataHost[j]) break;
+      k = j;
+      for (; j<args->expectedBytes/sizeof(int); j++)
+        if (expectedHost[j] == dataHost[j]) break;
+      l = j;
+      printf("\n Rank [%d] Expected: ", rank);
+      for (j=k; j<args->expectedBytes/sizeof(int) && j<l; j++) {
+        printf("%d:%d ", j, expectedHost[j]);
+      }
+      printf("\n Rank [%d] Actual  : ", rank);
+      for (j=k; j<args->expectedBytes/sizeof(int) && j<l; j++) {
+        printf("%d:%d ", j, dataHost[j]);
+      }
+      printf("\n");
+      free(expectedHost);
+      free(dataHost);
+    //}
 #endif
   }
   double nranks = args->nProcs*args->nThreads*args->nGpus;