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From: Jason Baron <jbaron@akamai.com>
To: lsf-pc@lists.linux-foundation.org
Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	famz@redhat.com, normalperson@yhbt.net
Subject: [LSF/MM TOPIC]  epoll topics
Date: Thu, 15 Jan 2015 23:08:37 -0500	[thread overview]
Message-ID: <54B88EC5.9020904@akamai.com> (raw)

Hi,

I think it would be interesting to discuss recent topics that have come
up around epoll.

I recently proposed a new locking scheme that removes the global locking
using 'connected components', see: https://lkml.org/lkml/2015/1/15/667.
There is a new syscall to batch epoll_ctl() operations and improve the
timer precision that Fam Zheng is proposing: https://lkml.org/lkml/2015/1/8/70.
In addition, Eric Wong has proposed a scheme using 'wait free queues' to
improve lock contention between wakeups and event gathering:
https://lkml.org/lkml/2013/3/14/14.

In addition, we've observed some short comings from our production systems.
Because wait queues are woken up in order, we can get unfair loading
across threads, and we can also receive unecessary wakeups. It would be
great to discuss these topics further.

Thanks,

-Jason

             reply	other threads:[~2015-01-16  4:08 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-16  4:08 Jason Baron [this message]
2015-01-19  3:50 ` [LSF/MM TOPIC] epoll topics Eric Wong
2015-01-20 18:55   ` Jason Baron
2015-01-20 19:58     ` Eric Wong
2015-01-20 20:37       ` Jason Baron

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