Sporadic failures of rt/tst-cputimer1 on ppc64le (POWER8 hardware)?

[Carlos O'Donell]

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.