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.
-----Original Message----- From: Borislav Petkov [mailto:b...@alien8.de] Sent: Wednesday, August 06, 2014 7:08 PM To: Lan, Tianyu Cc: t...@linutronix.de; mi...@redhat.com; h...@zytor.com; x...@kernel.org; toshi.k...@hp.com; imamm...@redhat.com; jan.kis...@siemens.com; mi...@kernel.org; huawei.li...@huawei.com; pra...@redhat.com; linux-kernel@vger.kernel.org; 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. --
