Re: balance storm

Libo Chen
2014-05-27T07:45:24Z

On 2014/5/26 22:03, Mike Galbraith wrote:
> On Mon, 2014-05-26 at 19:49 +0800, Libo Chen wrote:
>
>> how to turn off SD_SHARE_PKG_RESOURCES in userspace ?
>
> I use a script Ingo gave me years and years ago to
> twiddle /proc/sys/kernel/sched_domain/cpuN/domainN/flags domain wise.
> Doing that won't do you any good without a handler to build/tear down
> sd_llc when you poke at flags though. You can easily add a sched
> feature to play with it.

I make a simple script：

for ((i=0;i<=15;i++))
do
echo 4143 > /proc/sys/kernel/sched_domain/cpu$i/domain1/flags
done

In our kernel SD_SHARE_PKG_RESOURCE is 0x0200, the original flag value is 4655,
domain1's name is MC.

but migrations event doesn't reduce like yours, what problem? I wouldn't like
recompile kernel :(

>
> -Mike
>
>
>