Messages in this thread | | | Date | Tue, 25 May 2010 22:50:31 -0400 | From | Brian Bloniarz <> | Subject | Re: [PATCH] x86: Export tsc related information in sysfs |
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john stultz wrote: > On Tue, 2010-05-25 at 20:16 -0400, Brian Bloniarz wrote: >> On 05/24/2010 09:33 PM, Brian Bloniarz wrote: >>> So what's wrong with just adding a >>> /sys/devices/system/clocksource/clocksource0/tsc_khz? >> As an RFC: >> >> Add clocksource.sys_register & sys_unregister so the >> current clocksource can add supplemental information to >> /sys/devices/system/clocksource/clocksource0/ >> >> Export tsc_khz when current_clocksource==tsc so that >> daemons like NTP can account for the variability of >> calibration results. > > I think this is a bad idea, as it creates an ABI that is arch AND > machine specific, which will cause portability problems in applications > that expect the interface to be there.
It's an arch-independent ABI that returns ENOENT on unsupported platforms ;)
Could you please explain what you envision as an arch-independent solution to this problem? I guess the tsc_long_calibration=1 alternative is one.
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