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authorJoyce Kong <joyce.kong@arm.com>2019-03-25 17:14:58 +0800
committerThomas Monjalon <thomas@monjalon.net>2019-03-28 11:47:19 +0100
commitfe252fb695efa9deb95f2e6b7baf6f805996a5b0 (patch)
tree4c9e35002dc29b5136d70281131ec5539e0cb555 /app
parente8af2f1f11c8f35430086806988d43ff78414ba5 (diff)
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test/rwlock: benchmark on all available cores
Add performance test on all available cores to benchmark the scaling up performance of rw_lock. Fixes: af75078fece3 ("first public release") Cc: stable@dpdk.org Suggested-by: Gavin Hu <gavin.hu@arm.com> Signed-off-by: Joyce Kong <joyce.kong@arm.com> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Diffstat (limited to 'app')
-rw-r--r--app/test/test_rwlock.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/app/test/test_rwlock.c b/app/test/test_rwlock.c
index 224f0de..1d3774e 100644
--- a/app/test/test_rwlock.c
+++ b/app/test/test_rwlock.c
@@ -36,6 +36,7 @@
static rte_rwlock_t sl;
static rte_rwlock_t sl_tab[RTE_MAX_LCORE];
+static rte_atomic32_t synchro;
enum {
LC_TYPE_RDLOCK,
@@ -83,6 +84,77 @@ test_rwlock_per_core(__attribute__((unused)) void *arg)
return 0;
}
+static rte_rwlock_t lk = RTE_RWLOCK_INITIALIZER;
+static volatile uint64_t rwlock_data;
+static uint64_t lock_count[RTE_MAX_LCORE] = {0};
+
+#define TIME_MS 100
+#define TEST_RWLOCK_DEBUG 0
+
+static int
+load_loop_fn(__attribute__((unused)) void *arg)
+{
+ uint64_t time_diff = 0, begin;
+ uint64_t hz = rte_get_timer_hz();
+ uint64_t lcount = 0;
+ const unsigned int lcore = rte_lcore_id();
+
+ /* wait synchro for slaves */
+ if (lcore != rte_get_master_lcore())
+ while (rte_atomic32_read(&synchro) == 0)
+ ;
+
+ begin = rte_rdtsc_precise();
+ while (time_diff < hz * TIME_MS / 1000) {
+ rte_rwlock_write_lock(&lk);
+ ++rwlock_data;
+ rte_rwlock_write_unlock(&lk);
+
+ rte_rwlock_read_lock(&lk);
+ if (TEST_RWLOCK_DEBUG && !(lcount % 100))
+ printf("Core [%u] rwlock_data = %"PRIu64"\n",
+ lcore, rwlock_data);
+ rte_rwlock_read_unlock(&lk);
+
+ lcount++;
+ /* delay to make lock duty cycle slightly realistic */
+ rte_pause();
+ time_diff = rte_rdtsc_precise() - begin;
+ }
+
+ lock_count[lcore] = lcount;
+ return 0;
+}
+
+static int
+test_rwlock_perf(void)
+{
+ unsigned int i;
+ uint64_t total = 0;
+
+ printf("\nRwlock Perf Test on %u cores...\n", rte_lcore_count());
+
+ /* clear synchro and start slaves */
+ rte_atomic32_set(&synchro, 0);
+ if (rte_eal_mp_remote_launch(load_loop_fn, NULL, SKIP_MASTER) < 0)
+ return -1;
+
+ /* start synchro and launch test on master */
+ rte_atomic32_set(&synchro, 1);
+ load_loop_fn(NULL);
+
+ rte_eal_mp_wait_lcore();
+
+ RTE_LCORE_FOREACH(i) {
+ printf("Core [%u] count = %"PRIu64"\n", i, lock_count[i]);
+ total += lock_count[i];
+ }
+
+ printf("Total count = %"PRIu64"\n", total);
+
+ return 0;
+}
+
/*
* - There is a global rwlock and a table of rwlocks (one per lcore).
*
@@ -132,6 +204,9 @@ rwlock_test1(void)
rte_eal_mp_wait_lcore();
+ if (test_rwlock_perf() < 0)
+ return -1;
+
return 0;
}