Date: Fri, 5 Oct 2007 14:37:11 +0200
From: Jens Axboe <jens.axboe@oracle.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: David Chinner <dgc@sgi.com>, David Miller <davem@davemloft.net>,
       cebbert@redhat.com, willy@linux.intel.com, clameter@sgi.com,
       nickpiggin@yahoo.com.au, hch@lst.de, mel@skynet.ie,
       linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
       suresh.b.siddha@intel.com
Subject: Re: SLUB performance regression vs SLAB
Message-ID: <20071005123711.GR5711@kernel.dk>
References: <470554D9.2050505@redhat.com> <20071004.141113.08322956.davem@davemloft.net> <47055F84.109@redhat.com> <20071004.150718.95506800.davem@davemloft.net> <20071004222356.GH23367404@sgi.com> <20071005064853.GI5711@kernel.dk> <20071005115634.GV12049@parisc-linux.org>
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On Fri, Oct 05 2007, Matthew Wilcox wrote:
> On Fri, Oct 05, 2007 at 08:48:53AM +0200, Jens Axboe wrote:
> > I'd like to second Davids emails here, this is a serious problem. Having
> > a reproducible test case lowers the barrier for getting the problem
> > fixed by orders of magnitude. It's the difference between the problem
> > getting fixed in a day or two and it potentially lingering for months,
> > because email ping-pong takes forever and "the test team has moved on to
> > other tests, we'll let you know the results of test foo in 3 weeks time
> > when we have a new slot on the box" just removing any developer
> > motivation to work on the issue.
> 
> I vaguely remembered something called orasim, so I went looking for it.
> I found http://oss.oracle.com/~wcoekaer/orasim/ which is dated from
> 2004, and I found http://oss.oracle.com/projects/orasimjobfiles/ which
> seems to be a stillborn project.  Is there anything else I should know
> about orasim?  ;-)

I don't know much about orasim, except that internally we're trying to
use fio for that instead. As far as I know, it was a project that was
never feature complete (or completed all together, for that matter).

-- 
Jens Axboe

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