From: Jens Axboe <axboe@kernel.dk>
To: Greg Sullivan <greg.sullivan@sullivang.net>
Cc: fio@vger.kernel.org
Subject: Re: Direct io on Ubuntu i386?
Date: Mon, 20 Aug 2012 12:57:57 +0200 [thread overview]
Message-ID: <50321835.8060608@kernel.dk> (raw)
In-Reply-To: <CAHaS=Qwn2zxQWkvy=ZPQstwwOuX1P__=Gp1jw9WW3Jy6jpDWxA@mail.gmail.com>
On 08/20/2012 02:57 AM, Greg Sullivan wrote:
> I'm trying to do direct io (to avoid the file system cache) on Ubuntu
> i386. I've tried direct=1, and tried the io engines sync and libaio -
> it always seems to use the cache.
>
> Is there a way to bypass the file system cache on Ubuntu? I've got a
> vanilla install using the automated Ubuntu installer for Windows i386
> 32-bit (dual boot).
direct=1 will certainly bypass the cache on Linux, regardless of
version. What makes you suspect otherwise?
--
Jens Axboe
next prev parent reply other threads:[~2012-08-20 10:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-20 0:57 Direct io on Ubuntu i386? Greg Sullivan
2012-08-20 10:57 ` Jens Axboe [this message]
2012-08-20 11:37 ` Greg Sullivan
2012-08-20 11:42 ` Jens Axboe
2012-08-21 11:32 ` Greg Sullivan
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