linux-kernel - Re: 2.6.32 / RH 6.1 scheduler bloated

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <109116.1318181914@turing-police.cc.vt.edu>
Date:	Sun, 09 Oct 2011 13:38:34 -0400
From:	Valdis.Kletnieks@...edu
To:	Robert Kubrick <robertkubrick@...il.com>
Cc:	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.32 / RH 6.1 scheduler bloated

On Sun, 09 Oct 2011 10:26:22 EDT, Robert Kubrick said:
> Will try this, but I have older kernel version running on the same  
> hardware, with the same boot parameters, and showing a more  
> reasonable 2us wakeup latency. Still high, but coming out of idle can  
> be slow as you say.
> But 10us??

My first guess is that earlier kernels were dropping into a lower sleep state
that only took 2us to wake up, but newer kernels go into a deeper sleep state
that takes longer to wake up from...

Content of type "application/pgp-signature" skipped