[PATCH v4 04/11] test/stack: scale test based on number of cores

Stephen Hemminger
2026-03-05T17:54:01Z

This test uses loops to synchronize but has problems on systems
with high number of cores. Scale iterations to the number of
cores.

Fixes: 5e2e61b99e91 ("test/stack: check stack API")
Cc: stable@dpdk.org

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
app/test/test_stack.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/app/test/test_stack.c b/app/test/test_stack.c
index abc3114729..5517982774 100644
--- a/app/test/test_stack.c
+++ b/app/test/test_stack.c
@@ -268,10 +268,12 @@ test_free_null(void)
return 0;
}

-#define NUM_ITERS_PER_THREAD 100000
+#define NUM_ITERS_BASE 100000u
+#define NUM_ITERS_MIN 1000u

struct test_args {
struct rte_stack *s;
+ unsigned int num_iters;
};

static struct test_args thread_test_args;
@@ -280,9 +282,9 @@ static int
stack_thread_push_pop(__rte_unused void *args)
{
void *obj_table[MAX_BULK];
- int i;
+ unsigned int i;

- for (i = 0; i < NUM_ITERS_PER_THREAD; i++) {
+ for (i = 0; i < thread_test_args.num_iters; i++) {
unsigned int num;

num = rte_rand() % MAX_BULK;
@@ -308,12 +310,14 @@ test_stack_multithreaded(uint32_t flags)
{
unsigned int lcore_id;
struct rte_stack *s;
+ unsigned int iterations;
int result = 0;

if (rte_lcore_count() < 2) {
printf("Not enough cores for test_stack_multithreaded, expecting at least 2\n");
return TEST_SKIPPED;
}
+ iterations = test_scale_iterations(NUM_ITERS_BASE, NUM_ITERS_MIN);

printf("[%s():%u] Running with %u lcores\n",
__func__, __LINE__, rte_lcore_count());
@@ -325,6 +329,7 @@ test_stack_multithreaded(uint32_t flags)
return -1;
}

+ thread_test_args.num_iters = iterations;
thread_test_args.s = s;

if (rte_eal_mp_remote_launch(stack_thread_push_pop, NULL, CALL_MAIN))
--
2.51.0