clr: Update signal count and pool size for staging buffer (#2889)

* clr: Update signal count and pool size for staging buffer

* Change to naming of variables etc

---------

Co-authored-by: Rahul Manocha <rmanocha@amd.com>

projects/clr/rocclr/device/rocm/rocvirtual.cpp

@@ -1730,8 +1730,8 @@ VirtualGPU::VirtualGPU(Device& device, bool profiling, bool cooperative,
       schedulerThreads_(0),
       schedulerQueue_(nullptr),
       barriers_(*this),
-      managed_buffer_(*this, ManagedBuffer::kPoolNumSignals * device.settings().stagedXferSize_),
-      managed_kernarg_buffer_(*this, device.settings().kernargPoolSize_),
+      managed_buffer_(*this, kStagingPoolNumSignals * device.settings().stagedXferSize_, kStagingPoolNumSignals),
+      managed_kernarg_buffer_(*this, device.settings().kernargPoolSize_, kKernArgPoolNumSignals),
       cuMask_(cuMask),
       priority_(priority),
       copy_command_type_(0),
@@ -1912,7 +1912,7 @@ VirtualGPU::ManagedBuffer::~ManagedBuffer() {
 
 // ================================================================================================
 bool VirtualGPU::ManagedBuffer::Create(Device::MemorySegment mem_segment) {
-  pool_chunk_end_ = pool_size_ / kPoolNumSignals;
+  pool_chunk_end_ = pool_size_ / num_chunk_signals_;
   active_chunk_ = 0;
   // Allocate memory for managed buffer
   if (mem_segment == Device::MemorySegment::kKernArg &&
@@ -1965,14 +1965,14 @@ address VirtualGPU::ManagedBuffer::Acquire(uint32_t size, uint32_t alignment) {
     // Dispatch a barrier packet into the queue
     gpu_.dispatchBarrierPacket(kBarrierPacketHeader, kSkipSignal, pool_signal_[active_chunk_]);
     // Get the next chunk
-    active_chunk_ = ++active_chunk_ % kPoolNumSignals;
+    active_chunk_ = ++active_chunk_ % num_chunk_signals_;
     // Make sure the new active chunk is free
     bool test = WaitForSignal(pool_signal_[active_chunk_], gpu_.ActiveWait());
     assert(test && "Runtime can't fail a wait for chunk!");
     // Make sure the current offset matches the new chunk to avoid possible overlaps
     // between chunks and issues during recycle
     pool_cur_offset_ = (active_chunk_ == 0) ? 0 : pool_chunk_end_;
-    pool_chunk_end_ = pool_cur_offset_ + pool_size_ / kPoolNumSignals;
+    pool_chunk_end_ = pool_cur_offset_ + pool_size_ / num_chunk_signals_;
     result = amd::alignUp(pool_base_ + pool_cur_offset_, alignment);
     pool_cur_offset_ = (result + size) - pool_base_;
   }
@@ -1983,7 +1983,7 @@ address VirtualGPU::ManagedBuffer::Acquire(uint32_t size, uint32_t alignment) {
 // ================================================================================================
 void VirtualGPU::ManagedBuffer::ResetPool() {
   pool_cur_offset_ = 0;
-  pool_chunk_end_ = pool_size_ / kPoolNumSignals;
+  pool_chunk_end_ = pool_size_ / num_chunk_signals_;
   active_chunk_ = 0;
 }
 

projects/clr/rocclr/device/rocm/rocvirtual.hpp

@@ -203,9 +203,9 @@ class VirtualGPU : public device::VirtualDevice {
   class ManagedBuffer : public amd::EmbeddedObject {
    public:
     //! The number of chunks the arg pool will be divided
-    static constexpr uint32_t kPoolNumSignals = 16;
-    ManagedBuffer(VirtualGPU& gpu, uint32_t pool_size)
-        : gpu_(gpu), pool_size_(pool_size), pool_signal_(kPoolNumSignals) {}
+    ManagedBuffer(VirtualGPU& gpu, uint32_t pool_size, uint32_t num_signals)
+        : gpu_(gpu), pool_size_(pool_size), pool_signal_(num_signals),
+          num_chunk_signals_(num_signals) {}
     ~ManagedBuffer();
 
     //! Allocates all necessary resources to manage memory
@@ -228,6 +228,7 @@ class VirtualGPU : public device::VirtualDevice {
     uint32_t active_chunk_ = 0;              //!< The index of the current active chunk
     uint32_t pool_cur_offset_ = 0;           //!< Current active offset for update
     std::vector<hsa_signal_t> pool_signal_;  //!< Pool of HSA signals to manage multiple chunks
+    uint32_t num_chunk_signals_;                   //!< Number of signals used per chunk
   };
   class MemoryDependency : public amd::EmbeddedObject {
    public:
@@ -622,6 +623,9 @@ class VirtualGPU : public device::VirtualDevice {
   ManagedBuffer managed_buffer_;          //!< Memory manager for staging copies
   ManagedBuffer managed_kernarg_buffer_;  //!< Managed memory for kernel args
 
+  static constexpr uint32_t kStagingPoolNumSignals = 4; //!< Hsa Signal count for Staging Buffer
+  static constexpr uint32_t kKernArgPoolNumSignals = 16; //!< Hsa Signal count for KernArg Buffer
+
   friend class Timestamp;
 
   //  PM4 packet for gfx8 performance counter