linux-kernel - Re: [patch] CFS scheduler, -v12

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 for Android: free password hash cracker in your pocket

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

Date:	Thu, 17 May 2007 09:42:21 +1000
From:	Peter Williams <pwil3058@...pond.net.au>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Con Kolivas <kernel@...ivas.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Willy Tarreau <w@....eu>,
	Gene Heskett <gene.heskett@...il.com>, Mark Lord <lkml@....ca>
Subject: Re: [patch] CFS scheduler, -v12

Ingo Molnar wrote:
> * Peter Williams <pwil3058@...pond.net.au> wrote:
> 
>>> As usual, any sort of feedback, bugreport, fix and suggestion is more 
>>> than welcome,
>> Load balancing appears to be badly broken in this version.  When I 
>> started 4 hard spinners on my 2 CPU machine one ended up on one CPU 
>> and the other 3 on the other CPU and they stayed there.
> 
> hm, i cannot reproduce this on 4 different SMP boxen, trying various 
> combinations of SCHED_SMT/MC

You may need to try more than once.  Testing load balancing can be a 
pain as there's always a possibility you'll get a good result just by 
chance.  I.e. you need a bunch of good results to say it's OK but only 
one bad result to say it's broken.   This makes testing load balancing a 
pain.

> and other .config options that might make a 
> difference to balancing. Could you send me your .config?

Sent separately.

Peter
-- 
Peter Williams                                   pwil3058@...pond.net.au

"Learning, n. The kind of ignorance distinguishing the studious."
  -- Ambrose Bierce
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/