linux-kernel - Re: [RFC PATCH] fuse: support splice() reading from fuse device

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: <E1OF4Ak-00088m-Jm@pomaz-ex.szeredi.hu>
Date:	Thu, 20 May 2010 13:44:18 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	miklos@...redi.hu, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org
Subject: Re: [RFC PATCH] fuse: support splice() reading from fuse device

On Thu, 20 May 2010, Jens Axboe wrote:
> On Thu, May 20 2010, Miklos Szeredi wrote:
> > This continues zero copy I/O support on the fuse interface.  The first
> > part of the patchset (splice write support on fuse device) was posted
> > here:
> > 
> >   http://lkml.org/lkml/2010/4/28/215
> > 
> > With Jens' pipe growing patch and additional fuse patches it was
> > possible to achieve a 20GBytes/s write throghput on my laptop in a
> > "null" filesystem (no page cache, data goes to /dev/null).
> 
> Do you have some numbers on how that compares to the same test with the
> default 16 page pipe size?

With the default 64k pipe size it's about 4 times slower than with a
pipe size of 1MB.

Miklos
--
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/