[dpdk-dev] [PATCH v3 03/16] app/crypto-perf: limit number of sessions

[Pablo de Lara <pablo.de.lara.guarch@intel.com>]

Instead of creating a fixed number of sessions,
calculate the necessary number based on number of devices
and queue pairs used.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
---
 app/test-crypto-perf/main.c | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/app/test-crypto-perf/main.c b/app/test-crypto-perf/main.c
index 4ae14390b..b02d3f597 100644
--- a/app/test-crypto-perf/main.c
+++ b/app/test-crypto-perf/main.c
@@ -21,7 +21,6 @@
 #include "cperf_test_verify.h"
 #include "cperf_test_pmd_cyclecount.h"
 
-#define NUM_SESSIONS 2048
 #define SESS_MEMPOOL_CACHE_SIZE 64
 
 const char *cperf_test_type_strs[] = {
@@ -149,15 +148,41 @@ cperf_initialize_cryptodev(struct cperf_options *opts, uint8_t *enabled_cdevs,
 			.nb_descriptors = opts->nb_descriptors
 		};
 
+		uint32_t dev_max_nb_sess = cdev_info.sym.max_nb_sessions;
+		/* Two sessions objects are required for each session
+		 * (one for the header, one for the private data)
+		 */
+		uint32_t sessions_needed = 2 * enabled_cdev_count *
+						opts->nb_qps;
+#ifdef RTE_LIBRTE_PMD_CRYPTO_SCHEDULER
+		if (!strcmp((const char *)opts->device_type,
+					"crypto_scheduler")) {
+			uint32_t nb_slaves =
+				rte_cryptodev_scheduler_slaves_get(cdev_id,
+								NULL);
+
+			sessions_needed = 2 * enabled_cdev_count *
+				opts->nb_qps * nb_slaves;
+		}
+#endif
+		/*
+		 * A single session is required per queue pair
+		 * in each device
+		 */
+		if (dev_max_nb_sess < opts->nb_qps) {
+			RTE_LOG(ERR, USER1,
+				"Device does not support at least "
+				"%u sessions\n", opts->nb_qps);
+			return -ENOTSUP;
+		}
 		if (session_pool_socket[socket_id] == NULL) {
 			char mp_name[RTE_MEMPOOL_NAMESIZE];
 			struct rte_mempool *sess_mp;
 
 			snprintf(mp_name, RTE_MEMPOOL_NAMESIZE,
 				"sess_mp_%u", socket_id);
-
 			sess_mp = rte_mempool_create(mp_name,
-						NUM_SESSIONS,
+						sessions_needed,
 						max_sess_size,
 						SESS_MEMPOOL_CACHE_SIZE,
 						0, NULL, NULL, NULL,
-- 
2.14.4