[Pm-utils] cores offline after pm-suspend?

[Victor Lowther]

On Sun, 2010-05-30 at 17:04 +0200, Marc Weber wrote:
> Hi,
> 
> Some weeks ago I got a new laptop running core -i5 processsor.
> Everything seems to be working. However after resuming from suspend to
> ram htop only shows one core having 100% utilization and I can't seem to
> fix this putting cores off and online again using the sys cpuX/online
> interface.

Weird.  pm-utils does not do anything special with the cpus across
suspend/resume -- the kernel handles all that.

I have gone ahead and cc'ed the linux-pm mailing list.

> I've tried putting them offline before suspending as well.
> 
> My test case:
> 
> Makefile:
> 
>   a4: a1.x a2.x a3.x a4.x
>   all: a1.x a2.x a3.x a4.x a5.x a6.x a7.x a8.x a9.x a10.x a11.x b1.x b2.x b3.x b4.x 
>   %.x:
>           ./hog
> 
> hog is a just a c prog running a dummy loop which lasts about 4 secs.
> 
> I made a screenshot of htop:
> http://mawercer.de/~marc/htop.jpg
> Make started 4 processes, however only one is running on a core.
> 
> make -j4 doesn't finish faster than make -j1 either.
> 
> Do you have any idea how to start debugging this issue?
> 
> Of course everything is fine after rebooting.
> 
> My kernel:
> 
> Linux nixos 2.6.32.14 #1 SMP Sat May 29 22:06:43 UTC 2010 x86_64 GNU/Linux
> 
> using pm-utils-1.3.0
> 
> Any ideas or hints are appreciated.
> 
> Marc Weber
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> Pm-utils at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/pm-utils

-- 
Victor Lowther
LPIC2 UCP RHCE