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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-07-12 11:49:59 -0700 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-08-04 14:47:29 -0700 |
| commit | 8a22b9996b001c88f2bfb54c6de6a05fc39e177a (patch) | |
| tree | faf40add399c0652c7d2b2cdf0f01d805a91e207 /arch/x86/xen/enlighten.c | |
| parent | 31de189f7d02da163f77d46a86d9e655a2d83124 (diff) | |
| download | linux-8a22b9996b001c88f2bfb54c6de6a05fc39e177a.tar.gz linux-8a22b9996b001c88f2bfb54c6de6a05fc39e177a.tar.bz2 linux-8a22b9996b001c88f2bfb54c6de6a05fc39e177a.zip | |
xen: drop xen_sched_clock in favour of using plain wallclock time
xen_sched_clock only counts unstolen time. In principle this should
be useful to the Linux scheduler so that it knows how much time a process
actually consumed. But in practice this doesn't work very well as the
scheduler expects the sched_clock time to be synchronized between
cpus. It also uses sched_clock to measure the time a task spends
sleeping, in which case "unstolen time" isn't meaningful.
So just use plain xen_clocksource_read to return wallclock nanoseconds
for sched_clock.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/xen/enlighten.c')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 399bed2de881..fef034a04c24 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -926,7 +926,7 @@ static const struct pv_init_ops xen_init_ops __initdata = { }; static const struct pv_time_ops xen_time_ops __initdata = { - .sched_clock = xen_sched_clock, + .sched_clock = xen_clocksource_read, }; static const struct pv_cpu_ops xen_cpu_ops __initdata = { |