x86/UV: Lower UV rtc clocksource rating

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Lower the rating of the UV rtc clocksource to just below that of
the tsc, to improve performance.

Reading the tsc clocksource has lower latency than reading the
rtc, so favor it in situations where it is synchronized and
stable.  When the tsc is unsynchronized, the rtc needs to be the
chosen clocksource.

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/20120217141641.GA28063@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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Dimitri Sivanich 2012-02-17 08:16:41 -06:00 • committed by Ingo Molnar

parent b01543dfe6

commit b0deca2e02

1 changed files with 1 additions and 5 deletions

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arch/x86/platform/uv/uv_time.c

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