From: Sripathi Kodi <sripathik@in.ibm.com>
To: paulus@samba.org
Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
john stultz <johnstul@us.ibm.com>
Subject: [ppc] Disparity between sys_clock_getres and vdso implementation
Date: Sun, 27 Jan 2008 19:32:59 +0530 [thread overview]
Message-ID: <200801271932.59823.sripathik@in.ibm.com> (raw)
Hi Paul,
On PPC, I see a disparity between clock_getres implementations in the
vdso and syscall. I am using a IBM Openpower hardware and 2.6.24 kernel
with CONFIG_HIGH_RES_TIMERS=y.
clock_getres call for CLOCK_REALTIME returns 1 millisecond. However,
when I edit arch/powerpc/kernel/vdso*/gettimeofday.S to force it to use
sys_clock_getres, I get 1 nanosecond resolution. The code in vdso seems
to be returning some pre-defined (incorrect) variables.
Could you please let me know the reason for this? Is it something that
should be fixed in vdso?
Thanks,
Sripathi.
next reply other threads:[~2008-01-27 14:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-27 14:02 Sripathi Kodi [this message]
2008-02-04 6:08 ` [ppc] Disparity between sys_clock_getres and vdso implementation Tony Breeds
2008-02-05 5:16 ` [PATCH] [POWERPC] Use a sensible default for clock_getres() in the vdso Tony Breeds
2008-02-05 9:07 ` Chirag Jog
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