linux-kernel - Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements

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: <20070112075816.GA23341@elte.hu>
Date:	Fri, 12 Jan 2007 08:58:16 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Pierre Peiffer <pierre.peiffer@...l.net>
Cc:	LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org>,
	Ulrich Drepper <drepper@...hat.com>,
	Jakub Jelinek <jakub@...hat.com>
Subject: Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements

* Pierre Peiffer <pierre.peiffer@...l.net> wrote:

> [...] Any measure will be difficult to do with only FUTEX_WAIT/WAKE.

that's not a problem - just do such a measurement and show that it does 
/not/ impact performance measurably. That's what we want to know...

> (*) I'll try the volano bench, if I have time.

yeah. As an alternative, it might be a good idea to pthread-ify 
hackbench.c - that should replicate the Volano workload pretty 
accurately. I've attached hackbench.c. (it's process based right now, so 
it wont trigger contended futex ops)

	Ingo

View attachment "hackbench.c" of type "text/plain" (5409 bytes)