Skip to content

UCT/CUDA_IFACE: Add sm_107 and bandwidth value #11749

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
brminich merged 1 commit into from
Aug 14, 2026
Merged

UCT/CUDA_IFACE: Add sm_107 and bandwidth value #11749

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 5 additions & 1 deletion config/m4/cuda.m4
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ AC_DEFUN([UCX_CUDA_CHECK_NVCC], [
ARCH124_CODE="-gencode=arch=compute_89,code=sm_89"
ARCH128_CODE="-gencode=arch=compute_100,code=sm_100 -gencode=arch=compute_120,code=sm_120"
ARCH130_CODE="-gencode=arch=compute_110,code=sm_110"
ARCH134_CODE="-gencode=arch=compute_107,code=sm_107"


ARCH9_PTX="-gencode=arch=compute_70,code=compute_70"
Expand All @@ -44,6 +45,7 @@ AC_DEFUN([UCX_CUDA_CHECK_NVCC], [
ARCH124_PTX="-gencode=arch=compute_90,code=compute_90"
ARCH128_PTX="-gencode=arch=compute_120,code=compute_120"
ARCH130_PTX="-gencode=arch=compute_120,code=compute_120"
ARCH134_PTX="-gencode=arch=compute_107,code=compute_107"

AS_IF([test "x$NVCC" != "x"], [
CUDA_VERSION=$($NVCC --version | grep release | sed 's/.*release //' | sed 's/\,.*//')
Expand Down Expand Up @@ -75,7 +77,9 @@ AC_DEFUN([UCX_CUDA_CHECK_NVCC], [
[AS_CASE([$CUDA_MAJOR_VERSION],
[13],
[# offline compilation support for architectures before '<compute/sm/lto>_75' is discontinued
NVCC_ARCH="${ARCH10_CODE} ${ARCH110_CODE} ${ARCH111_CODE} ${ARCH120_CODE} ${ARCH124_CODE} ${ARCH128_CODE} ${ARCH130_CODE} ${ARCH130_PTX}"],
NVCC_ARCH="${ARCH10_CODE} ${ARCH110_CODE} ${ARCH111_CODE} ${ARCH120_CODE} ${ARCH124_CODE} ${ARCH128_CODE} ${ARCH130_CODE} ${ARCH130_PTX}"
AS_CASE([$CUDA_MINOR_VERSION],
[4], [NVCC_ARCH="${NVCC_ARCH} ${ARCH134_CODE} ${ARCH134_PTX}"])],
[12],
[AS_CASE([$CUDA_MINOR_VERSION],
[0|1|2|3],
Expand Down
2 changes: 2 additions & 0 deletions config/ucx.conf
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,8 @@ UCX_MAX_RMA_RAILS=4
UCX_REG_NONBLOCK_MEM_TYPES=host,cuda-managed
UCX_IB_ODP_MEM_TYPES=host,cuda-managed
UCX_IB_PCI_RELAXED_ORDERING=try
UCX_CUDA_COPY_ASYNC_MEM_TYPE=cuda
UCX_CUDA_COPY_BW=1.8TBs,d2d:3.6TBs

[Fujitsu ARM]
CPU vendor=Fujitsu ARM
Expand Down
16 changes: 15 additions & 1 deletion src/uct/cuda/cuda_ipc/cuda_ipc_iface.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -201,7 +201,7 @@ uct_cuda_ipc_iface_is_reachable_v2(const uct_iface_h tl_iface,
static double uct_cuda_ipc_iface_get_bw()
{
CUdevice cu_device;
int major_version;
int major_version, minor_version = 0;
ucs_status_t status;

status = UCT_CUDADRV_FUNC_LOG_ERR(cuDeviceGet(&cu_device, 0));
Expand All @@ -217,6 +217,16 @@ static double uct_cuda_ipc_iface_get_bw()
return 0;
}

if (major_version == UCT_CUDA_BASE_GEN_B100) {
status = UCT_CUDADRV_FUNC_LOG_ERR(
cuDeviceGetAttribute(&minor_version,
CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MINOR,
cu_device));
if (status != UCS_OK) {
return 0;
}
}

/*
* TODO: Detect nvswitch
*/
Expand All @@ -230,6 +240,10 @@ static double uct_cuda_ipc_iface_get_bw()
case UCT_CUDA_BASE_GEN_H100:
return 400000.0 * UCS_MBYTE;
case UCT_CUDA_BASE_GEN_B100:
if (minor_version == 7) {
return 1800000.0 * UCS_MBYTE;
}

return 800000.0 * UCS_MBYTE;
default:
return 6911.0 * UCS_MBYTE;
Expand Down