Re: [PATCH] X86/CPU: Avoid 100ms sleep for cpu offline during S3

[Gene Heskett]

On Wednesday 06 August 2014, Lan, Tianyu wrote:
>Have you tried my attached kernel config file? When someone reported
>the issue to me, I also was very hard to reproduce the issue by my own
>config file. Maybe once 100 tries. But I can reproduced the issue every
>time with the attached configure file on several my machines and even
>on server.

There was no attachment.
>
>-----Original Message-----
>From: Borislav Petkov [mailto:bp@xxxxxxxxx]
>Sent: Wednesday, August 06, 2014 7:08 PM
>To: Lan, Tianyu
>Cc: tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; hpa@xxxxxxxxx; x86@xxxxxxxxxx;
>toshi.kani@xxxxxx; imammedo@xxxxxxxxxx; jan.kiszka@xxxxxxxxxxx;
>mingo@xxxxxxxxxx; huawei.libin@xxxxxxxxxx; prarit@xxxxxxxxxx;
>linux-kernel@xxxxxxxxxxxxxxx; Brandt, Todd E Subject: Re: [PATCH]
>X86/CPU: Avoid 100ms sleep for cpu offline during S3
>
>On Tue, Aug 05, 2014 at 05:29:18PM +0800, Lan Tianyu wrote:
>> I think you can pull Tod's tool from git hub and do test from your
>> laptop. I attached a configure file come from ubuntu which is easier
>> to produce the issue. You can use it to reproduce the issue.
>
>Right, so I ran it on an old dualcore AMD laptop I have lying around
>here and it didn't show any difference with or without your patch.
>
>For all 4 runs I did with the tool running it without any arguments (so
>it did the default thing), I got suspend time for CPU1 of 4-6 msec and
>resume of ~20msec.
>
>I don't know whether it is the dual core or AMD but your patch doesn't
>change anything on that laptop which is ok, I'd guess.
>
>> Ok. BTW, I have tested it on the Ivbridge and Haswell machines.
>
>Yeah, add those numbers to the commit message too.
>
>Thanks.
>
>--
>Regards/Gruss,
>    Boris.
>
>Sent from a fat crate under my desk. Formatting is fine.
>--


Cheers, Gene Heskett
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