diff mbox series

[v3,1/1] test/trace: collect perf data after worker threads exit

Message ID 20210310021527.19305-2-feifei.wang2@arm.com (mailing list archive)
State Accepted, archived
Delegated to: David Marchand
Headers
Series [v3,1/1] test/trace: collect perf data after worker threads exit |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK
ci/iol-intel-Functional success Functional Testing PASS
ci/github-robot success github build: passed
ci/iol-abi-testing success Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS
ci/iol-mellanox-Functional success Functional Testing PASS
ci/iol-testing success Testing PASS
ci/travis-robot warning travis build: errored
ci/intel-Testing success Testing PASS

Commit Message

Feifei Wang March 10, 2021, 2:15 a.m. UTC 
  The measure_perf function should be executed 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>
Acked-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
---
 app/test/test_trace_perf.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Comments

David Marchand April 14, 2021, 2:14 p.m. UTC | #1 
On Wed, Mar 10, 2021 at 3:15 AM Feifei Wang <feifei.wang2@arm.com> wrote:
>
> The measure_perf function should be executed 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: 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>
> Acked-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
> Acked-by: Jerin Jacob <jerinj@marvell.com>

Applied, thanks.
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