* [PATCH] test: fix race in per lcore test
@ 2025-03-17 14:30 David Marchand
0 siblings, 0 replies; only message in thread
From: David Marchand @ 2025-03-17 14:30 UTC (permalink / raw)
To: dev; +Cc: stable, Tyler Retzlaff
In some CI, this unit test can fail, as the main thread may get
rescheduled while lcores execute the callback waiting 100ms.
Bugzilla ID: 1668
Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
---
app/test/test_per_lcore.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/app/test/test_per_lcore.c b/app/test/test_per_lcore.c
index 63c5c80c24..9c72f0fa21 100644
--- a/app/test/test_per_lcore.c
+++ b/app/test/test_per_lcore.c
@@ -59,17 +59,29 @@ display_vars(__rte_unused void *arg)
}
static int
-test_per_lcore_delay(__rte_unused void *arg)
+test_per_lcore_delay(void *arg)
{
+ RTE_ATOMIC(bool) *wait;
+
rte_delay_ms(100);
printf("wait 100ms on lcore %u\n", rte_lcore_id());
+ if (arg == NULL)
+ return 0;
+
+ wait = arg;
+ while (rte_atomic_load_explicit(wait, rte_memory_order_relaxed)) {
+ rte_delay_ms(100);
+ printf("wait 100ms on lcore %u\n", rte_lcore_id());
+ }
+
return 0;
}
static int
test_per_lcore(void)
{
+ RTE_ATOMIC(bool) wait = true;
unsigned lcore_id;
int ret;
@@ -86,7 +98,7 @@ test_per_lcore(void)
}
/* test if it could do remote launch twice at the same time or not */
- ret = rte_eal_mp_remote_launch(test_per_lcore_delay, NULL, SKIP_MAIN);
+ ret = rte_eal_mp_remote_launch(test_per_lcore_delay, &wait, SKIP_MAIN);
if (ret < 0) {
printf("It fails to do remote launch but it should able to do\n");
return -1;
@@ -97,6 +109,7 @@ test_per_lcore(void)
printf("It does remote launch successfully but it should not at this time\n");
return -1;
}
+ rte_atomic_store_explicit(&wait, false, rte_memory_order_relaxed);
RTE_LCORE_FOREACH_WORKER(lcore_id) {
if (rte_eal_wait_lcore(lcore_id) < 0)
return -1;
--
2.48.1
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