From: Dave Hansen <dave@sr71.net>
To: Dave Hansen <dave.hansen@intel.com>,
linux-ext4@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
Theodore Ts'o <tytso@mit.edu>, Jan kara <jack@suse.cz>,
gnehzuil.liu@gmail.com
Subject: Re: ext4 extent status tree LRU locking
Date: Wed, 12 Jun 2013 10:52:13 -0700 [thread overview]
Message-ID: <51B8B54D.2040200@sr71.net> (raw)
In-Reply-To: <20130612160320.GA29156@gmail.com>
FWIW, I'm also seeing this contention to a much smaller extent on much
more "normal" hardware. I've got a 6-core (as opposed to 80) desktop
machine where I'm doing the same test on a real disk (instead of a
loopback-mounted ramfs file).
I'm seeing _about_ 10% CPU time being used on just spinning on the same
ext4 LRU lock.
next prev parent reply other threads:[~2013-06-12 17:52 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-11 23:22 ext4 extent status tree LRU locking Dave Hansen
2013-06-12 7:17 ` Zheng Liu
2013-06-12 15:09 ` Dave Hansen
2013-06-12 16:03 ` Zheng Liu
2013-06-12 17:52 ` Dave Hansen [this message]
2013-06-12 20:48 ` Theodore Ts'o
2013-06-13 13:27 ` Zheng Liu
2013-06-13 13:35 ` Theodore Ts'o
2013-06-14 3:27 ` Zheng Liu
2013-06-14 14:09 ` Zheng Liu
2013-06-14 14:02 ` Theodore Ts'o
2013-06-14 17:00 ` Zheng Liu
2013-06-14 18:00 ` Theodore Ts'o
2013-06-17 10:10 ` Zheng Liu
2013-06-17 21:12 ` Dave Hansen
2013-06-18 2:25 ` Zheng Liu
2013-06-18 2:51 ` Theodore Ts'o
2013-06-18 3:49 ` Zheng Liu
2013-06-18 2:47 ` Theodore Ts'o
2013-06-14 15:57 ` Dave Hansen
2013-06-14 17:11 ` Zheng Liu
2013-06-14 16:55 ` Dave Hansen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=51B8B54D.2040200@sr71.net \
--to=dave@sr71.net \
--cc=dave.hansen@intel.com \
--cc=gnehzuil.liu@gmail.com \
--cc=jack@suse.cz \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.