linux-kernel - Re: stat benchmark

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]

Message-ID: <ed038eb20804271540q7df7ebe0p8e5c6b15c85813e0@mail.gmail.com>
Date:	Mon, 28 Apr 2008 00:40:28 +0200
From:	"Carl Henrik Lunde" <chlunde@...g.uio.no>
To:	"Soeren Sandmann" <sandmann@...mi.au.dk>
Cc:	linux-kernel@...r.kernel.org, "Zach Brown" <zach.brown@...cle.com>
Subject: Re: stat benchmark

On Thu, Apr 24, 2008 at 10:59 PM, Soeren Sandmann <sandmann@...mi.au.dk> wrote:
[...]
>  Under the theory that disk seeks are killing us, one idea is to add a
>  'multistat' system call that would allow statting of many files at a
>  time, which would give the disk scheduler more to work with.

Instead of a specific system call for "multistat" it would be interesting
to look at syslets.  I'm not sure what the current state of that work is,
the last reference I find is http://lkml.org/lkml/2007/12/6/336 and more
interestingly http://lkml.org/lkml/2008/1/9/327

I guess it would be difficult to get close to the optimal disk schedule by
using syslets; if a directory contains 1000 files that would require 1000
syslets and a good I/O scheduler - that's unlikely to be feasible.

I've added Zach Brown to Cc because he authored the last syslet patchset.

-- 
Carl Henrik
--
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/