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Sporadic failures of rt/tst-cputimer1 on ppc64le (POWER8 hardware)?
- From: Carlos O'Donell <carlos at redhat dot com>
- To: GNU C Library <libc-alpha at sourceware dot org>, Tulio Magno Quites Machado Filho <tuliom at linux dot vnet dot ibm dot com>, Carlos Eduardo Seo <cseo at linux dot vnet dot ibm dot com>
- Date: Fri, 29 Apr 2016 15:00:34 -0400
- Subject: Sporadic failures of rt/tst-cputimer1 on ppc64le (POWER8 hardware)?
- Authentication-results: sourceware.org; auth=none
On ppc64le I see a sporadic failure in rt/tst-cputimer1:
clock_gettime returned timespec = { 0, 405994 }
clock_getres returned timespec = { 0, 1 }
*** timer sig1 invoked too soon: 0.400715218 instead of expected 0.400761014
*** timer sig2 invoked too soon: 0.500710982 instead of expected 0.500761014
The kernel says the clock resolution is 1 nanosecond, that seems exceedingly
prcise.
The kernel invokes the signal ~46 micorseconds too early, which is not
allowed by the tests. You can invoke late, but not early.
Have either of you seen this before?
--
Cheers,
Carlos.