From: Mark Wielaard <mark@klomp.org>
Date: Tue, 14 Jan 2025 00:30:40 +0000 (+0100)
Subject: rt: skip nanosleep interval and abs test for low precision clocks
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;ds=inline;p=thirdparty%2Fglibc.git

rt: skip nanosleep interval and abs test for low precision clocks

If a clock doesn't have enough precision to check the sleep resolution
(quantum.tv_nsec > TEST_NSEC / 10) then record the quantum.tv_nsec,
but skip the interval_test and abs_test for that clock.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Tested-by: Magnus Lindholm <linmag7@gmail.com>
---

diff --git a/rt/tst-clock_nanosleep2.c b/rt/tst-clock_nanosleep2.c
index 0a34a273e8..18df0c2c8e 100644
--- a/rt/tst-clock_nanosleep2.c
+++ b/rt/tst-clock_nanosleep2.c
@@ -87,9 +87,14 @@ test_interval_1 (const char *n_clock, clockid_t t_clock)
   /* Arbitrary to ensure our time period is sufficiently bigger than
      the time step.  */
   TEST_VERIFY (clock_getres (t_clock, &quantum) == 0);
-  printf("Clock quantum: %lld ns, test time: %lld ns\n",
+  printf("%s quantum: %lld ns, test time: %lld ns\n", n_clock,
 	 (long long int) quantum.tv_nsec, (long long int) TEST_NSEC);
-  TEST_VERIFY (quantum.tv_nsec <= TEST_NSEC / 10);
+  if (quantum.tv_nsec > TEST_NSEC / 10)
+    {
+      printf ("SKIPPING test_interval for clock %s, not enough precision\n",
+	      n_clock);
+      return;
+    }
 
   min_slept = TEST_NSEC;
 
@@ -125,9 +130,14 @@ test_abs_1 (const char *n_clock, clockid_t t_clock)
   /* Arbitrary to ensure our time period is sufficiently bigger than
      the time step.  */
   TEST_VERIFY (clock_getres (t_clock, &quantum) == 0);
-  printf("Clock quantum: %lld ns, test time: %lld ns\n",
+  printf("%s quantum: %lld ns, test time: %lld ns\n", n_clock,
 	 (long long int) quantum.tv_nsec, (long long int) TEST_NSEC);
-  TEST_VERIFY (quantum.tv_nsec <= TEST_NSEC / 10);
+  if (quantum.tv_nsec > TEST_NSEC / 10)
+    {
+      printf ("SKIPPING test_abs for clock %s, not enough precision\n",
+	      n_clock);
+      return;
+    }
 
   me_sleep = make_timespec (0,  TEST_NSEC);