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Intra-node shared memory (SHM) optimizations for CPU primitives #458

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Intra-node shared memory (SHM) optimizations for CPU primitives #458

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1738e8e
add shm allreduce
gaopengff Jul 11, 2025
76d1114
add bf16 and half support
gaopengff Jul 16, 2025
2d152a3
remove bf16 support
gaopengff Jul 18, 2025
8c29eeb
add bf16 support
gaopengff Jul 22, 2025
554d317
use reduce function to do reduce job
gaopengff Jul 24, 2025
0fdde35
refine format
gaopengff Jul 24, 2025
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2 changes: 2 additions & 0 deletions gloo/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ list(APPEND GLOO_SRCS
"${CMAKE_CURRENT_SOURCE_DIR}/allgatherv.cc"
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce.cc"
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce_local.cc"
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce_shm.cc"
"${CMAKE_CURRENT_SOURCE_DIR}/alltoall.cc"
"${CMAKE_CURRENT_SOURCE_DIR}/alltoallv.cc"
"${CMAKE_CURRENT_SOURCE_DIR}/barrier.cc"
Expand All @@ -34,6 +35,7 @@ list(APPEND GLOO_HDRS
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce_local.h"
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce_ring.h"
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce_ring_chunked.h"
"${CMAKE_CURRENT_SOURCE_DIR}/allreduce_shm.h"
"${CMAKE_CURRENT_SOURCE_DIR}/alltoall.h"
"${CMAKE_CURRENT_SOURCE_DIR}/alltoallv.h"
"${CMAKE_CURRENT_SOURCE_DIR}/barrier.h"
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10 changes: 10 additions & 0 deletions gloo/allreduce.cc
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Expand Up @@ -15,6 +15,7 @@
#include "gloo/common/logging.h"
#include "gloo/math.h"
#include "gloo/types.h"
#include "gloo/allreduce_shm.h"

namespace gloo {

Expand Down Expand Up @@ -153,6 +154,15 @@ void ring(
const auto slot = Slot::build(kAllreduceSlotPrefix, opts.tag);
const size_t totalBytes = opts.elements * opts.elementSize;


if (is_intra_node(context->size)) {
shm(opts);
return;
}

//shm(opts);
//return;

// Note: context->size > 1
const auto recvRank = (context->size + context->rank + 1) % context->size;
const auto sendRank = (context->size + context->rank - 1) % context->size;
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