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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sat, 19 May 2007 15:27:54 +0200
From:	"Dmitry Adamushko" <>
To:	"Peter Williams" <>
Cc:	"Ingo Molnar" <>,
	"Linux Kernel" <>
Subject: Re: [patch] CFS scheduler, -v12

On 18/05/07, Peter Williams <> wrote:
> [...]
> One thing that might work is to jitter the load balancing interval a
> bit.  The reason I say this is that one of the characteristics of top
> and gkrellm is that they run at a more or less constant interval (and,
> in this case, X would also be following this pattern as it's doing
> screen updates for top and gkrellm) and this means that it's possible
> for the load balancing interval to synchronize with their intervals
> which in turn causes the observed problem.  A jittered load balancing
> interval should break the synchronization.  This would certainly be
> simpler than trying to change the move_task() logic for selecting which
> tasks to move.

Just an(quick) another idea. Say, the load balancer would consider not
only p->load_weight but also something like Tw(task) =
(time_spent_on_runqueue / total_task's_runtime) * some_scale_constant
as an additional "load" component (OTOH, when a task starts, it takes
some time for this parameter to become meaningful). I guess, it could
address the scenarios your have described (but maybe break some others
as well :) ...
Any hints on why it's stupid?

> Peter
> --
> Peter Williams                         

Best regards,
Dmitry Adamushko
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists