diff mbox series

[v1,2/2] app/test: collect perf data after worker threads exit

Message ID 20201222063054.44429-3-feifei.wang2@arm.com (mailing list archive)
State Superseded
Delegated to: David Marchand
Headers show
Series remove smp barriers in app/test | expand

Checks

Context Check Description
ci/iol-testing success Testing PASS
ci/iol-abi-testing success Testing PASS
ci/iol-testing success Testing PASS
ci/iol-abi-testing success Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/Intel-compilation success Compilation OK
ci/checkpatch warning coding style issues

Commit Message

Feifei Wang Dec. 22, 2020, 6:30 a.m. UTC
The measure_perf function should be excuted after worker threads exit
to collect correct perf data. Otherwise, while workers are running, the
main thread may get incomplete data from workers.

In the meanwhile, remove unnecessary barrier in the test.
For signal variables "ldata.done" and "ldata.start", no operations
should keep the order that being executed after them. So the wmb after
them can be moved.

Fixes: 16a277a24c9f ("test/trace: add performance test cases")
Cc: jerinj@marvell.com
Cc: stable@dpdk.org

Suggested-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
 app/test/test_trace_perf.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/app/test/test_trace_perf.c b/app/test/test_trace_perf.c
index e1ad8e6f5..46ae7d807 100644
--- a/app/test/test_trace_perf.c
+++ b/app/test/test_trace_perf.c
@@ -79,7 +79,6 @@  signal_workers_to_finish(struct test_data *data)
 
 	for (workers = 0; workers < data->nb_workers; workers++) {
 		data->ldata[workers].done = 1;
-		rte_smp_wmb();
 	}
 }
 
@@ -102,7 +101,6 @@  worker_fn_##func(void *arg) \
 { \
 	struct lcore_data *ldata = arg; \
 	ldata->started = 1; \
-	rte_smp_wmb(); \
 	__worker_##func(ldata); \
 	return 0; \
 }
@@ -137,11 +135,12 @@  run_test(const char *str, lcore_function_t f, struct test_data *data, size_t sz)
 
 	wait_till_workers_are_ready(data);
 	rte_delay_ms(100); /* Wait for some time to accumulate the stats */
-	measure_perf(str, data);
 	signal_workers_to_finish(data);
 
 	RTE_LCORE_FOREACH_WORKER(id)
 		rte_eal_wait_lcore(id);
+
+	measure_perf(str, data);
 }
 
 static int