Messages in this thread | | | Date | Mon, 10 Oct 2011 11:53:19 -0400 | From | Konrad Rzeszutek Wilk <> | Subject | Re: [PATCH] cpu idle ticks show twice in xen pvm guest |
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On Wed, Oct 05, 2011 at 10:11:58PM -0700, Zhenzhong Duan wrote: > Run below test on xen pvm. > # x=$(cat /proc/stat | grep cpu0 | awk '{print $5}') && sleep 60 \ > && y=$(cat /proc/stat | grep cpu0 | awk '{print $5}') \ > && echo -e "X:$x\nY:$y\nIDLE:" $(echo "scale=3; ($y-$x)/6000*100" | bc) > > @ X:58562301 > @ Y:58574282 > @ IDLE: 199.600 > > Normal idle percent should be around 100%. > xen_timer_interrupt called account_idle_ticks to account hypervisor stolen idle ticks > but these ticks will be accounted again when idle ticks restarted. > > Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> > Signed-off-by: Joe Jin <joe.jin@oracle.com>
Please in the future also CC the maintainers (you can get that using the scripts/get_maintainer.pl).
Jeremy, any thoughts? > > diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c > index 163b467..5dcbc91 100644 > --- a/arch/x86/xen/time.c > +++ b/arch/x86/xen/time.c > @@ -151,7 +151,6 @@ static void do_stolen_accounting(void) > > ticks = iter_div_u64_rem(blocked, NS_PER_TICK, &blocked); > __this_cpu_write(xen_residual_blocked, blocked); > - account_idle_ticks(ticks); > } > > /* Get the TSC speed from Xen */ > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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