[ofw] [PATCH] opensm - libvendor reduce stack utilization
Smith, Stan
stan.smith at intel.com
Fri May 21 12:42:40 PDT 2010
Done in svn.commit 2806
Smith, Stan wrote:
> Reduce stack consumption by using a union of structs.
> Borrowed from osm_vendor_umad_sa.c
>
> signed-off-by: stan smith <stan.smith at intel.com>
>
> --- a/ulp/opensm/user/libvendor/osm_vendor_mlx_sa.c Thu May 20
> 11:51:00 2010 +++ b/ulp/opensm/user/libvendor/osm_vendor_mlx_sa.c Thu
> May 20 11:45:32 2010 @@ -593,14 +593,23 @@
> osmv_query_sa(IN osm_bind_handle_t h_bind,
> IN const osmv_query_req_t * const p_query_req)
> {
> - osmv_sa_bind_info_t *p_bind = (osmv_sa_bind_info_t *) h_bind;
> + union {
> + ib_service_record_t svc_rec;
> + ib_node_record_t node_rec;
> + ib_portinfo_record_t port_info;
> + ib_path_rec_t path_rec;
> +#ifdef DUAL_SIDED_RMPP
> + ib_multipath_rec_t multipath_rec;
> +#endif
> + ib_class_port_info_t class_port_info;
> + } u;
> osmv_sa_mad_data_t sa_mad_data;
> + osmv_sa_bind_info_t *p_bind = (osmv_sa_bind_info_t *) h_bind;
> osmv_user_query_t *p_user_query;
> - ib_service_record_t svc_rec;
> - ib_node_record_t node_rec;
> - ib_portinfo_record_t port_info;
> - ib_path_rec_t path_rec;
> - ib_class_port_info_t class_port_info;
> +#ifdef DUAL_SIDED_RMPP
> + osmv_multipath_req_t *p_mpr_req;
> + int i, j;
> +#endif
> osm_log_t *p_log = p_bind->p_log;
> ib_api_status_t status;
>
> @@ -610,6 +619,8 @@
> sa_mad_data.method = IB_MAD_METHOD_GETTABLE;
> sa_mad_data.attr_mod = 0;
>
> + memset((void*)&u, 0, sizeof(u));
> +
> /* Set the MAD attributes and component mask correctly. */
> switch (p_query_req->query_type) {
>
> @@ -634,7 +645,7 @@
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_service_record_t));
> sa_mad_data.comp_mask = 0;
> - sa_mad_data.p_attr = &svc_rec;
> + sa_mad_data.p_attr = &u.svc_rec;
> break;
>
> case OSMV_QUERY_SVC_REC_BY_NAME:
> @@ -645,8 +656,8 @@
> sa_mad_data.comp_mask = IB_SR_COMPMASK_SNAME;
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_service_record_t));
> - sa_mad_data.p_attr = &svc_rec;
> - memcpy(svc_rec.service_name, p_query_req->p_query_input,
> + sa_mad_data.p_attr = &u.svc_rec;
> + memcpy(u.svc_rec.service_name, p_query_req->p_query_input,
> sizeof(ib_svc_name_t));
> break;
>
> @@ -657,8 +668,8 @@
> sa_mad_data.comp_mask = IB_SR_COMPMASK_SID;
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_service_record_t));
> - sa_mad_data.p_attr = &svc_rec;
> - svc_rec.service_id =
> + sa_mad_data.p_attr = &u.svc_rec;
> + u.svc_rec.service_id =
> *(ib_net64_t *) (p_query_req->p_query_input);
> break;
>
> @@ -670,7 +681,7 @@
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_class_port_info_t));
> sa_mad_data.comp_mask = 0;
> - sa_mad_data.p_attr = &class_port_info;
> + sa_mad_data.p_attr = &u.class_port_info;
>
> break;
>
> @@ -682,8 +693,8 @@
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_node_record_t));
> sa_mad_data.comp_mask = IB_NR_COMPMASK_NODEGUID;
> - sa_mad_data.p_attr = &node_rec;
> - node_rec.node_info.node_guid =
> + sa_mad_data.p_attr = &u.node_rec;
> + u.node_rec.node_info.node_guid =
> *(ib_net64_t *) (p_query_req->p_query_input);
>
> break;
> @@ -695,8 +706,8 @@
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_portinfo_record_t));
> sa_mad_data.comp_mask = IB_PIR_COMPMASK_LID;
> - sa_mad_data.p_attr = &port_info;
> - port_info.lid = *(ib_net16_t *) (p_query_req->p_query_input);
> + sa_mad_data.p_attr = &u.port_info;
> + u.port_info.lid = *(ib_net16_t *) (p_query_req->p_query_input);
> break;
>
> case OSMV_QUERY_PORT_REC_BY_LID_AND_NUM:
> @@ -746,39 +757,37 @@
> case OSMV_QUERY_PATH_REC_BY_PORT_GUIDS:
> osm_log(p_log, OSM_LOG_DEBUG,
> "osmv_query_sa DBG:001 %s", "PATH_REC_BY_PORT_GUIDS\n");
> - memset(&path_rec, 0, sizeof(ib_path_rec_t));
> + memset(&u.path_rec, 0, sizeof(ib_path_rec_t));
> sa_mad_data.attr_id = IB_MAD_ATTR_PATH_RECORD;
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_path_rec_t));
> sa_mad_data.comp_mask =
> (IB_PR_COMPMASK_DGID | IB_PR_COMPMASK_SGID |
> IB_PR_COMPMASK_NUMBPATH);
> - path_rec.num_path = 0x7f;
> - sa_mad_data.p_attr = &path_rec;
> - ib_gid_set_default(&path_rec.dgid,
> + u.path_rec.num_path = 0x7f;
> + sa_mad_data.p_attr = &u.path_rec;
> + ib_gid_set_default(&u.path_rec.dgid,
> ((osmv_guid_pair_t *) (p_query_req->
> - p_query_input))->
> - dest_guid);
> - ib_gid_set_default(&path_rec.sgid,
> + p_query_input))->dest_guid);
> + ib_gid_set_default(&u.path_rec.sgid,
> ((osmv_guid_pair_t *) (p_query_req->
> - p_query_input))->
> - src_guid);
> + p_query_input))->src_guid);
> break;
>
> case OSMV_QUERY_PATH_REC_BY_GIDS:
> osm_log(p_log, OSM_LOG_DEBUG,
> "osmv_query_sa DBG:001 %s", "PATH_REC_BY_GIDS\n");
> - memset(&path_rec, 0, sizeof(ib_path_rec_t));
> + memset(&u.path_rec, 0, sizeof(ib_path_rec_t));
> sa_mad_data.attr_id = IB_MAD_ATTR_PATH_RECORD;
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_path_rec_t));
> sa_mad_data.comp_mask =
> - (IB_PR_COMPMASK_DGID | IB_PR_COMPMASK_SGID |
> IB_PR_COMPMASK_NUMBPATH);
> - path_rec.num_path = 0x7f;
> - sa_mad_data.p_attr = &path_rec;
> - memcpy(&path_rec.dgid,
> + (IB_PR_COMPMASK_DGID | IB_PR_COMPMASK_SGID |
> IB_PR_COMPMASK_NUMBPATH); + u.path_rec.num_path = 0x7f;
> + sa_mad_data.p_attr = &u.path_rec;
> + memcpy(&u.path_rec.dgid,
> &((osmv_gid_pair_t *) (p_query_req->p_query_input))->
> dest_gid, sizeof(ib_gid_t));
> - memcpy(&path_rec.sgid,
> + memcpy(&u.path_rec.sgid,
> &((osmv_gid_pair_t *) (p_query_req->p_query_input))->
> src_gid, sizeof(ib_gid_t));
> break;
> @@ -786,18 +795,18 @@
> case OSMV_QUERY_PATH_REC_BY_LIDS:
> osm_log(p_log, OSM_LOG_DEBUG,
> "osmv_query_sa DBG:001 %s", "PATH_REC_BY_LIDS\n");
> - memset(&path_rec, 0, sizeof(ib_path_rec_t));
> + memset(&u.path_rec, 0, sizeof(ib_path_rec_t));
> sa_mad_data.method = IB_MAD_METHOD_GET;
> sa_mad_data.attr_id = IB_MAD_ATTR_PATH_RECORD;
> sa_mad_data.attr_offset =
> ib_get_attr_offset(sizeof(ib_path_rec_t));
> sa_mad_data.comp_mask =
> (IB_PR_COMPMASK_DLID | IB_PR_COMPMASK_SLID);
> - sa_mad_data.p_attr = &path_rec;
> - path_rec.dlid =
> + sa_mad_data.p_attr = &u.path_rec;
> + u.path_rec.dlid =
> ((osmv_lid_pair_t *) (p_query_req->p_query_input))->
> dest_lid;
> - path_rec.slid =
> + u.path_rec.slid =
> ((osmv_lid_pair_t *) (p_query_req->p_query_input))->src_lid;
> break;
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