DPDK test suite provides much broader architecture coverage than
what can be tested locally so enable the test to help identify
potential issues.
Signed-off-by: Tomasz Duszynski <tduszyn...@marvell.com>
---
app/test/test_pmu.c | 44 +++++++++++++++++++++++++++++++++++++++++---
1 file changed, 41 insertions(+), 3 deletions(-)
diff --git a/app/test/test_pmu.c b/app/test/test_pmu.c
index 10513bf9c9..dd23046f59 100644
--- a/app/test/test_pmu.c
+++ b/app/test/test_pmu.c
@@ -2,10 +2,47 @@
* Copyright(C) 2025 Marvell International Ltd.
*/
+#include <stdbool.h>
+#include <stdio.h>
+#include <unistd.h>
+
#include <rte_pmu.h>
#include "test.h"
+#define PERF_EVENT_PARANOID_PATH "/proc/sys/kernel/perf_event_paranoid"
+
+static bool perf_allowed_quirk(void)
+{
+ int level, ret;
+ FILE *fp;
+
+ fp = fopen(PERF_EVENT_PARANOID_PATH, "r");
+ if (!fp)
+ return false;
+
+ ret = fscanf(fp, "%d", &level);
+ fclose(fp);
+ if (ret != 1)
+ return false;
+
+ /* On vanilla Linux the default perf_event_paranoid level is 2, which
allows non-privileged
+ * processes to access performance counters.
+ *
+ * Debian / Ubuntu and their derivatives apply patches that introduce
+ * additional paranoia levels:
+ *
+ * - Debian adds level 3, which restricts access to perf_event_open()
for
+ * monitoring other processes, but still allows unprivileged
self-monitoring.
+ * See:
https://lore.kernel.org/all/1469630746-32279-1-git-send-email-je...@google.com/
+ * - Ubuntu adds level 4 (which is also the default), completely
disabling perf_event_open()
+ * for unprivileged users—effectively disabling self-monitoring.
+ *
+ * That said, check below should be sufficient to enable this test on
most kernels.
+ */
+ return level < 4;
+}
+
static int
test_pmu_read(void)
{
@@ -24,6 +61,9 @@ test_pmu_read(void)
return TEST_SKIPPED;
}
+ if (!perf_allowed_quirk())
+ return TEST_SKIPPED;
+
if (rte_pmu_init() < 0)
return TEST_FAILED;
@@ -52,6 +92,4 @@ test_pmu(void)
return unit_test_suite_runner(&pmu_tests);
}
-/* disabled because of reported failures, waiting for a fix
- * REGISTER_FAST_TEST(pmu_autotest, true, true, test_pmu);
- */
+REGISTER_FAST_TEST(pmu_autotest, true, true, test_pmu);
--
2.34.1
