linux-kernel - Re: [REPORT] cfs-v4 vs sd-0.44

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

Message-ID: <a36005b50704211249pb771b79k227914515b5f9906@mail.gmail.com>
Date:	Sat, 21 Apr 2007 12:49:52 -0700
From:	"Ulrich Drepper" <drepper@...il.com>
To:	"Kyle Moffett" <mrmacman_g4@....com>
Cc:	"William Lee Irwin III" <wli@...omorphy.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Willy Tarreau" <w@....eu>, "Ingo Molnar" <mingo@...e.hu>,
	"Con Kolivas" <kernel@...ivas.org>, linux-kernel@...r.kernel.org,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Nick Piggin" <npiggin@...e.de>, "Mike Galbraith" <efault@....de>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Peter Williams" <pwil3058@...pond.net.au>,
	"Thomas Gleixner" <tglx@...utronix.de>, caglar@...dus.org.tr,
	"Gene Heskett" <gene.heskett@...il.com>
Subject: Re: [REPORT] cfs-v4 vs sd-0.44

On 4/21/07, Kyle Moffett <mrmacman_g4@....com> wrote:
> It might be nice if it was possible to actively contribute your CPU
> time to a child process.  For example:
> int sched_donate(pid_t pid, struct timeval *time, int percentage);

If you do this, and it has been requested many a times, then please
generalize it.  We have the same issue with futexes.  If a FUTEX_WAIT
call is issues the remaining time in the slot should be given to the
thread currently owning the futex.  For non-PI futexes this needs an
extension of the interface but I would be up for that.  It can have
big benefits on the throughput of an application.
-
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/