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DAOS-16935 cart: add D_MEM_DEVICE and cio_mem_device init option #15937

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Merged
daltonbohning merged 2 commits into from
Feb 18, 2026
Merged

DAOS-16935 cart: add D_MEM_DEVICE and cio_mem_device init option #15937

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ec5dc4f
DAOS-16935 cart: add D_MEM_DEVICE and cio_mem_device init option
soumagne Feb 19, 2025
21eb4e3
DAOS-16935 cart: fix D_INFO print
soumagne Feb 12, 2026
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5 changes: 5 additions & 0 deletions src/cart/README.env
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Original file line number Diff line number Diff line change
Expand Up @@ -226,3 +226,8 @@ This file lists the environment variables used in CaRT.
D_PROGRESS_BUSY
Force busy polling when progressing, preventing from sleeping when waiting for
new messages.

D_MEM_DEVICE
Enable detection and use of memory devices (GPU, etc) to perform RMA transfers to/from.
Be wary of potential performance impacts if this variable is set and memory devices
are not used.
5 changes: 3 additions & 2 deletions src/cart/crt_hg.c
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
/*
* (C) Copyright 2016-2024 Intel Corporation.
* (C) Copyright 2025 Google LLC
* (C) Copyright 2025 Hewlett Packard Enterprise Development LP
* (C) Copyright 2025-2026 Hewlett Packard Enterprise Development LP
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*/
Expand Down Expand Up @@ -846,7 +846,7 @@ crt_hg_class_init(crt_provider_t provider, int ctx_idx, bool primary, int iface_

init_info.na_init_info.auth_key = prov_data->cpg_na_config.noc_auth_key;

if (crt_provider_is_block_mode(provider) && !prov_data->cpg_progress_busy)
if (crt_provider_is_block_mode(provider) && !crt_gdata.cg_progress_busy)
init_info.na_init_info.progress_mode = 0;
else
init_info.na_init_info.progress_mode = NA_NO_BLOCK;
Expand All @@ -872,6 +872,7 @@ crt_hg_class_init(crt_provider_t provider, int ctx_idx, bool primary, int iface_
init_info.traffic_class = (enum na_traffic_class)crt_gdata.cg_swim_tc;
if (thread_mode_single)
init_info.na_init_info.thread_mode = NA_THREAD_MODE_SINGLE;
init_info.na_init_info.request_mem_device = crt_gdata.cg_mem_device;
retry:
hg_class = HG_Init_opt2(info_string, crt_is_service(), HG_VERSION(2, 4), &init_info);
if (hg_class == NULL) {
Expand Down
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