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UCP/RKEY: Sender flush if memory sys_dev is not remote lane sys_dev #10931

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Merged
merged 1 commit into from
Oct 7, 2025
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UCP/RKEY: Sender flush if memory sys_dev is not remote lane sys_dev #10931

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11 changes: 6 additions & 5 deletions src/ucp/proto/proto_multi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -144,13 +144,14 @@ ucp_proto_multi_select_bw_lanes(const ucp_proto_init_params_t *params,
static ucp_sys_dev_map_t ucp_proto_multi_init_flush_sys_dev_mask(
const ucp_proto_multi_init_params_t *params, ucp_lane_index_t lane)
{
const ucp_rkey_config_key_t *key = params->super.super.rkey_config_key;
const uct_iface_attr_t *iface_attr =
ucp_proto_common_get_iface_attr(&params->super.super, lane);
const ucp_rkey_config_key_t *key = params->super.super.rkey_config_key;
ucs_sys_device_t dst_sys_dev =
params->super.super.ep_config_key->lanes[lane].dst_sys_dev;

/* Flush needed when remote lane sys_dev is not the final memory sys_dev */
if ((key == NULL) || !ucp_rkey_need_remote_flush(key) ||
!(iface_attr->cap.flags & UCT_IFACE_FLAG_GET_BCOPY) ||
!ucp_proto_common_is_net_dev(&params->super.super, lane)) {
(dst_sys_dev == UCS_SYS_DEVICE_ID_UNKNOWN) ||
(dst_sys_dev == key->sys_dev)) {
return 0;
}

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