From: Daniel Phillips <phillips@google.com>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Mark Fasheh <mark.fasheh@oracle.com>,
Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@suse.de>,
ocfs2-devel@oss.oracle.com, linux-kernel@vger.kernel.org
Subject: [Ocfs2-devel] Ocfs2 performance bugs of doom
Date: Fri, 10 Mar 2006 02:27:01 -0800 [thread overview]
Message-ID: <44115475.7040804@google.com> (raw)
In-Reply-To: <20060310023305.GB28722@fieldses.org>
J. Bruce Fields wrote:
> On Wed, Mar 08, 2006 at 10:26:09PM -0800, Daniel Phillips wrote:
>>A poor distribution as you already noticed[1].
>
> How did you decide that?
I looked at it and jumped to the wrong conclusion :-)
When I actually simulated it I found that the distribution is in fact
not much different from what I get from rand. So much for trying to
pin the blame on the hash function. Next lets try to pin the blame
on vmalloc. (Spoiler: it's not vmalloc's fault either.)
Regards,
Daniel
WARNING: multiple messages have this Message-ID (diff)
From: Daniel Phillips <phillips@google.com>
To: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Mark Fasheh <mark.fasheh@oracle.com>,
Andrew Morton <akpm@osdl.org>, Andi Kleen <ak@suse.de>,
ocfs2-devel@oss.oracle.com, linux-kernel@vger.kernel.org
Subject: Re: [Ocfs2-devel] Ocfs2 performance bugs of doom
Date: Fri, 10 Mar 2006 02:27:01 -0800 [thread overview]
Message-ID: <44115475.7040804@google.com> (raw)
In-Reply-To: <20060310023305.GB28722@fieldses.org>
J. Bruce Fields wrote:
> On Wed, Mar 08, 2006 at 10:26:09PM -0800, Daniel Phillips wrote:
>>A poor distribution as you already noticed[1].
>
> How did you decide that?
I looked at it and jumped to the wrong conclusion :-)
When I actually simulated it I found that the distribution is in fact
not much different from what I get from rand. So much for trying to
pin the blame on the hash function. Next lets try to pin the blame
on vmalloc. (Spoiler: it's not vmalloc's fault either.)
Regards,
Daniel
next prev parent reply other threads:[~2006-03-10 10:27 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-03 22:27 [Ocfs2-devel] Ocfs2 performance bugs of doom Daniel Phillips
2006-03-03 22:27 ` Daniel Phillips
2006-03-04 0:53 ` [Ocfs2-devel] " Mark Fasheh
2006-03-04 0:53 ` Mark Fasheh
2006-03-04 3:42 ` [Ocfs2-devel] " Daniel Phillips
2006-03-04 3:42 ` Daniel Phillips
2006-03-04 7:36 ` Andrew Morton
2006-03-04 7:37 ` [Ocfs2-devel] " Andrew Morton
2006-03-05 19:22 ` Mark Fasheh
2006-03-05 19:22 ` Mark Fasheh
2006-03-06 1:28 ` [Ocfs2-devel] " Daniel Phillips
2006-03-06 1:28 ` Daniel Phillips
2006-03-06 2:58 ` [Ocfs2-devel] " Mark Fasheh
2006-03-06 2:58 ` Mark Fasheh
2006-03-06 4:59 ` Daniel Phillips
2006-03-06 4:59 ` Daniel Phillips
2006-03-06 19:51 ` Mark Fasheh
2006-03-06 19:51 ` Mark Fasheh
2006-03-07 3:34 ` Andi Kleen
2006-03-07 3:34 ` Andi Kleen
2006-03-07 4:58 ` [Ocfs2-devel] " Mark Fasheh
2006-03-07 4:58 ` Mark Fasheh
2006-03-07 6:56 ` [Ocfs2-devel] " Daniel Phillips
2006-03-07 6:56 ` Daniel Phillips
2006-03-09 6:26 ` Daniel Phillips
2006-03-09 6:26 ` Daniel Phillips
2006-03-09 7:26 ` Nick Piggin
2006-03-09 7:26 ` Nick Piggin
2006-03-09 7:43 ` Nick Piggin
2006-03-09 7:43 ` Nick Piggin
2006-03-09 4:19 ` Andi Kleen
2006-03-09 4:19 ` Andi Kleen
2006-03-09 12:30 ` Nick Piggin
2006-03-09 12:30 ` Nick Piggin
2006-03-10 5:14 ` Nick Piggin
2006-03-10 5:14 ` Nick Piggin
2006-03-10 0:21 ` [Ocfs2-devel] Ocfs2 performance Mark Fasheh
2006-03-10 0:21 ` Mark Fasheh
2006-03-10 1:14 ` Bernd Eckenfels
2006-03-10 7:10 ` Joel Becker
2006-03-10 7:10 ` Joel Becker
2006-03-11 1:09 ` Mark Fasheh
2006-03-11 1:09 ` Mark Fasheh
2006-03-11 1:57 ` Bernd Eckenfels
2006-03-11 1:57 ` Bernd Eckenfels
2006-03-10 11:17 ` Daniel Phillips
2006-03-10 11:17 ` Daniel Phillips
2006-03-10 18:23 ` Zach Brown
2006-03-10 18:23 ` Zach Brown
2006-03-10 21:13 ` Daniel Phillips
2006-03-10 21:13 ` Daniel Phillips
2006-03-10 21:13 ` Daniel Phillips
2006-03-10 21:13 ` Daniel Phillips
2006-03-10 2:33 ` [Ocfs2-devel] Ocfs2 performance bugs of doom J. Bruce Fields
2006-03-10 2:33 ` J. Bruce Fields
2006-03-10 10:27 ` Daniel Phillips [this message]
2006-03-10 10:27 ` Daniel Phillips
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