From: Jeff Garzik <jeff@garzik.org>
To: Project Hail <hail-devel@vger.kernel.org>
Subject: chunkd thread work
Date: Sun, 01 Nov 2009 23:21:55 -0500 [thread overview]
Message-ID: <4AEE5E63.4030101@garzik.org> (raw)
I removed libevent support from chunkd, because I felt it was blocking
the multi-threading of chunkd to an unfortunate degree. libevent does
not provide any protection for multiple threads adding and removing
themselves to a single poll-set.
Multi-threading chunkd should enable us to reach our full I/O throughput
potential through parallelization. It will also enable useful
administrative tasks such as background checksum verification.
Jeff
commit 47a916242eb795b27ca86cb68a25135a14741b5f
Author: Jeff Garzik <jeff@garzik.org>
Date: Sun Nov 1 23:11:18 2009 -0500
chunkd: drop libevent support, due to lack of thread-friendliness
libevent does not support a single poll-set being manipulated
simultaneously by multiple threads, so it is replaced with a
poll(2)-based mechanism highly similar to cld's.
An epoll mechanism would be a logical next-step.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
commit 441eb192ef5d68e6d563f045a3c061d9bc403684
Author: Jeff Garzik <jeff@garzik.org>
Date: Sun Nov 1 20:39:09 2009 -0500
chunkd: add cli_wr_set_poll() to isolate libevent usage
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
next reply other threads:[~2009-11-02 4:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-02 4:21 Jeff Garzik [this message]
2009-11-02 4:26 ` chunkd thread work Pete Zaitcev
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=4AEE5E63.4030101@garzik.org \
--to=jeff@garzik.org \
--cc=hail-devel@vger.kernel.org \
/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.