Torus-2QoS makes persistent use of osm_port_t:priv to speed calculation of path SL values.
However, osm_switch_recommend_path() uses a non-NULL osm_port_t:priv as a flag that osm_port_t:priv holds a tracking array used when LMC > 0. It turns out that 1) dump_ucast_routes() does not need osm_switch_recommend_path() to consider alternate routes, and 2) before the addition of torus-2QoS, osm_port_t:priv use never persisted past the unicast routing function, so it was always NULL on entry to dump_ucast_routes(). Fix this up by making the routing_for_lmc flag explicitly set by the caller of osm_switch_recommend_path(), rather than inferring it from osm_port_t:priv. This retains existing behavior for existing routing engines, and allows torus-2QoS to make persistent use of osm_port_t:priv. The alternative would be to add another member to osm_port_t, say osm_port_t:priv2. Signed-off-by: Jim Schutt <jasc...@sandia.gov> --- opensm/include/opensm/osm_switch.h | 12 ++++++++++++ opensm/opensm/osm_dump.c | 2 +- opensm/opensm/osm_switch.c | 7 ++++--- opensm/opensm/osm_ucast_mgr.c | 1 + 4 files changed, 18 insertions(+), 4 deletions(-) diff --git a/opensm/include/opensm/osm_switch.h b/opensm/include/opensm/osm_switch.h index 205896d..0b4fc78 100644 --- a/opensm/include/opensm/osm_switch.h +++ b/opensm/include/opensm/osm_switch.h @@ -876,6 +876,7 @@ uint8_t osm_switch_recommend_path(IN const osm_switch_t * p_sw, IN osm_port_t * p_port, IN uint16_t lid_ho, IN unsigned start_from, IN boolean_t ignore_existing, + IN boolean_t routing_for_lmc, IN boolean_t dor); /* * PARAMETERS @@ -898,6 +899,17 @@ uint8_t osm_switch_recommend_path(IN const osm_switch_t * p_sw, * If false, the switch will choose an existing route if one * exists, otherwise will choose the optimal route. * +* routing_for_lmc +* [in] We support an enhanced LMC aware routing mode: +* In the case of LMC > 0, we can track the remote side +* system and node for all of the lids of the target +* and try and avoid routing again through the same +* system / node. +* +* Assume if routing_for_lmc is TRUE that this procedure +* was provided with the tracking array and counter via +* p_port->priv, and we can conduct this algorithm. +* * dor * [in] If TRUE, Dimension Order Routing will be done. * diff --git a/opensm/opensm/osm_dump.c b/opensm/opensm/osm_dump.c index f3f4623..030de74 100644 --- a/opensm/opensm/osm_dump.c +++ b/opensm/opensm/osm_dump.c @@ -221,7 +221,7 @@ static void dump_ucast_routes(cl_map_item_t * item, FILE * file, void *cxt) /* No LMC Optimization */ best_port = osm_switch_recommend_path(p_sw, p_port, lid_ho, 1, TRUE, - dor); + FALSE, dor); fprintf(file, "No %u hop path possible via port %u!", best_hops, best_port); } diff --git a/opensm/opensm/osm_switch.c b/opensm/opensm/osm_switch.c index 1cd8bfc..14b0021 100644 --- a/opensm/opensm/osm_switch.c +++ b/opensm/opensm/osm_switch.c @@ -214,6 +214,7 @@ uint8_t osm_switch_recommend_path(IN const osm_switch_t * p_sw, IN osm_port_t * p_port, IN uint16_t lid_ho, IN unsigned start_from, IN boolean_t ignore_existing, + IN boolean_t routing_for_lmc, IN boolean_t dor) { /* @@ -223,10 +224,10 @@ uint8_t osm_switch_recommend_path(IN const osm_switch_t * p_sw, and try and avoid routing again through the same system / node. - If this procedure is provided with the tracking array - and counter we can conduct this algorithm. + Assume if routing_for_lmc is true that this procedure was + provided the tracking array and counter via p_port->priv, + and we can conduct this algorithm. */ - boolean_t routing_for_lmc = (p_port->priv != NULL); uint16_t base_lid; uint8_t hops; uint8_t least_hops; diff --git a/opensm/opensm/osm_ucast_mgr.c b/opensm/opensm/osm_ucast_mgr.c index 9a3ea25..fbc9244 100644 --- a/opensm/opensm/osm_ucast_mgr.c +++ b/opensm/opensm/osm_ucast_mgr.c @@ -251,6 +251,7 @@ static void ucast_mgr_process_port(IN osm_ucast_mgr_t * p_mgr, */ port = osm_switch_recommend_path(p_sw, p_port, lid_ho, start_from, p_mgr->p_subn->ignore_existing_lfts, + p_mgr->p_subn->opt.lmc, p_mgr->is_dor); if (port == OSM_NO_PATH) { -- 1.5.6.GIT -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html