From: Jeff Layton <jlayton@redhat.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Andrew Morton <akpm@osdl.org>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/3] i_ino uniqueness: alternate approach -- hash the inodes
Date: Wed, 24 Jan 2007 11:57:29 -0500 [thread overview]
Message-ID: <45B78FF9.40202@redhat.com> (raw)
In-Reply-To: <200701241621.44923.dada1@cosmosbay.com>
Eric Dumazet wrote:
> The problem is you wont see the overhead of insert/delete the inode in a
> global tree, since you keep hot caches.
>
> To have a better estimate of the overhead, I suggest you try to use more
> active pipes like :
>
Eric, thanks for the new program. With that, the situation looks slightly
worse:
hashing patch (pipebench):
sys 1m15.329s
sys 1m16.249s
sys 1m17.169s
unpatched (pipebench):
sys 1m9.836s
sys 1m12.541s
sys 1m14.153s
Which works out to 1.05642174294555027017. So ~5-6%.
-- Jeff
next prev parent reply other threads:[~2007-01-24 16:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-16 18:57 [PATCH 0/3] i_ino uniqueness: alternate approach -- hash the inodes Jeff Layton
2007-01-24 4:46 ` Andrew Morton
2007-01-24 14:22 ` Jeff Layton
2007-01-24 15:21 ` Eric Dumazet
2007-01-24 16:57 ` Jeff Layton [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-01-08 20:46 Jeff Layton
2007-01-10 20:58 ` Eric Sandeen
2006-12-29 19:10 Jeff Layton
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