hpet timer patch for powertop

[Ahmed Kamal]

Hi,
I just tried powertop (amazing tool), however I was shocked that around 70%
of my laptop's wake ups are from
"  67.5% (756.5)       <interrupt> : extra timer interrupt"
Google told me, I am not running tickless (although, my kernel is
2.6.22.4-45_1.cubbi_suspend2.fc6) and the chipset on my toshiba A105
satellite laptop seem to be ICH6 Family. Do I need that patch that forces
enabling hpet timers?! If so, is there any (un)official fedora kernel that
includes the patch, as I don't like to manually track kernel upgrades. I
hope that patch will be integrated in mainstream fedora kernels soon.
Regards

[Josh Boyer]

On Sat, 22 Sep 2007 15:04:07 +0200
"Ahmed Kamal" <email.ahmedkamal(a)googlemail.com&gt; wrote:

>  Hi,
>  I just tried powertop (amazing tool), however I was shocked that around 70%
>  of my laptop's wake ups are from
>  "  67.5% (756.5)       <interrupt> : extra timer interrupt"
>  Google told me, I am not running tickless (although, my kernel is
>  2.6.22.4-45_1.cubbi_suspend2.fc6) and the chipset on my toshiba A105
>  satellite laptop seem to be ICH6 Family. Do I need that patch that forces
>  enabling hpet timers?! If so, is there any (un)official fedora kernel that
>  includes the patch, as I don't like to manually track kernel upgrades. I
>  hope that patch will be integrated in mainstream fedora kernels soon.
>  Regards 
I have no idea where the kernel you have came from, but if you're
running x86_64 and you want tickless you'll need to upgrade to Fedora
8.  I don't recall if F7 has tickless for i686 or not, but F8 does for
sure.

josh

[Ahmed Kamal]

actually I'm still on FC6, and I'm using i686 CPU. The kernel is from
tuxonice (suspend2) which is basically the same fedora kernel with suspend2
patches. Anyway, I thought all .22 kernels had tickless, dont they.
If all of this + hpet patches will be in fedora8, I will be a happy fedorian
;)

On 9/22/07, Josh Boyer <jwboyer(a)jdub.homelinux.org&gt; wrote:
>  On Sat, 22 Sep 2007 15:04:07 +0200
>  "Ahmed Kamal" <email.ahmedkamal(a)googlemail.com&gt; wrote:
>
>  > Hi,
>  > I just tried powertop (amazing tool), however I was shocked that around
>  70%
>  > of my laptop's wake ups are from
>  > "  67.5% (756.5)       <interrupt> : extra timer interrupt"
>  > Google told me, I am not running tickless (although, my kernel is
>  > 2.6.22.4-45_1.cubbi_suspend2.fc6) and the chipset on my toshiba A105
>  > satellite laptop seem to be ICH6 Family. Do I need that patch that
>  forces
>  > enabling hpet timers?! If so, is there any (un)official fedora kernel
>  that
>  > includes the patch, as I don't like to manually track kernel upgrades. I
>  > hope that patch will be integrated in mainstream fedora kernels soon.
>  > Regards
>
>  I have no idea where the kernel you have came from, but if you're
>  running x86_64 and you want tickless you'll need to upgrade to Fedora
>  8.  I don't recall if F7 has tickless for i686 or not, but F8 does for
>  sure.
>
>  josh
>
>  --
>  fedora-devel-list mailing list
>  fedora-devel-list(a)redhat.com
>  https://www.redhat.com/mailman/listinfo/fedora-devel-list
>

[Christopher Brown]

On 22/09/2007, Ahmed Kamal <email.ahmedkamal(a)googlemail.com&gt; wrote:
>  actually I'm still on FC6, and I'm using i686 CPU. The kernel is from
>  tuxonice (suspend2) which is basically the same fedora kernel with suspend2
>  patches. Anyway, I thought all .22 kernels had tickless, dont they.
>  If all of this + hpet patches will be in fedora8, I will be a happy
>  fedorian ;) 

Yes, all kernels >= 2.6.22 for x86 are tickless. x86_64 are not for f7 but
will be for f8.

http://fedoraproject.org/wiki/Releases/FeatureTicklessKernel

Cheers
Chris

-- 
http://www.chruz.com

[Ahmed Kamal]

Cool, but it seems that my tickless kernel is ticking! Also since "grep -i
hpet /proc/timer_list" returns nothing, it seems my BIOS is disabling hpet,
so the hpet force-enable patch is needed. I guess the question now is, will
F8 kernel contain that patch? Since the powertop guys say that *lots* of
BIOSs disable hpet, I think it's beneficial to merge that.

On 9/22/07, Christopher Brown <snecklifter(a)gmail.com&gt; wrote:
>  On 22/09/2007, Ahmed Kamal <email.ahmedkamal(a)googlemail.com&gt; wrote:
>  >
>  > actually I'm still on FC6, and I'm using i686 CPU. The kernel is from
>  > tuxonice (suspend2) which is basically the same fedora kernel with suspend2
>  > patches. Anyway, I thought all .22 kernels had tickless, dont they.
>  > If all of this + hpet patches will be in fedora8, I will be a happy
>  > fedorian ;)
>
>
>  Yes, all kernels >= 2.6.22 for x86 are tickless. x86_64 are not for f7 but
>  will be for f8.
>
>  http://fedoraproject.org/wiki/Releases/FeatureTicklessKernel
>
>  Cheers
>  Chris
>
>  --
>  http://www.chruz.com
>  --
>  fedora-devel-list mailing list
>  fedora-devel-list(a)redhat.com
>  https://www.redhat.com/mailman/listinfo/fedora-devel-list
>