From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Darren Hart <dvhart@linux.intel.com>,
Manfred Spraul <manfred@colorfullife.com>,
David Miller <davem@davemloft.net>,
Eric Dumazet <eric.dumazet@gmail.com>,
Mike Galbraith <efault@gmx.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: [RFC][PATCH 0/3] delayed wakeup list
Date: Wed, 14 Sep 2011 15:30:34 +0200 [thread overview]
Message-ID: <20110914133034.687048806@chello.nl> (raw)
This patch-set provides the infrastructure to delay/batch task wakeups.
This is useful for locking primitives that can effect multiple wakeups
per operation and want to avoid lock internal lock contention by
delaying the wakeups until we've released the lock internal locks.
Patch 2 converts futexes
Patch 3 converts sysv sems, and is broken
[ I've been staring at patch 3 way too long, so I thought I'd post it just
to get a few more eyes on it.. ]
Alternatively it can be used to avoid issuing multiple wakeups, and
thus save a few cycles, in packet processing. Queue all target tasks
and wakeup once you've processed all packets. That way you avoid
waking the target task multiple times if there were multiple packets
for the same task.
No actual such usage yet, but ISTR talking to some net folks a long while back
about this, is there still interest, Dave, Eric?
next reply other threads:[~2011-09-14 13:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-14 13:30 Peter Zijlstra [this message]
2011-09-14 13:30 ` [RFC][PATCH 1/3] sched: Provide delayed wakeup list Peter Zijlstra
2011-09-14 13:50 ` Peter Zijlstra
2011-09-14 14:08 ` Eric Dumazet
2011-09-14 14:12 ` Peter Zijlstra
2011-09-14 15:35 ` Darren Hart
2011-09-14 15:39 ` Peter Zijlstra
2011-09-14 15:49 ` Darren Hart
2011-09-16 7:59 ` Paul Turner
2011-09-16 7:59 ` Paul Turner
2011-09-16 8:48 ` Peter Zijlstra
2011-10-02 14:01 ` Manfred Spraul
2011-10-03 10:23 ` Peter Zijlstra
2011-09-14 13:30 ` [RFC][PATCH 2/3] futex: Reduce hash bucket lock contention Peter Zijlstra
2011-09-14 15:46 ` Darren Hart
2011-09-14 15:51 ` Peter Zijlstra
2011-09-14 16:00 ` Darren Hart
2011-09-14 20:49 ` Thomas Gleixner
2011-09-16 12:34 ` Peter Zijlstra
2011-09-17 12:57 ` Manfred Spraul
2011-09-19 7:37 ` Peter Zijlstra
2011-09-19 8:51 ` Peter Zijlstra
2011-09-14 13:30 ` [RFC][PATCH 3/3] ipc/sem: Rework wakeup scheme Peter Zijlstra
2011-09-15 17:29 ` Manfred Spraul
2011-09-15 19:32 ` Peter Zijlstra
2011-09-15 19:35 ` Peter Zijlstra
2011-09-15 19:45 ` Peter Zijlstra
2011-09-17 12:36 ` Manfred Spraul
2011-09-16 12:18 ` Peter Zijlstra
2011-09-17 12:32 ` Manfred Spraul
2011-09-16 12:39 ` Peter Zijlstra
2011-09-14 13:51 ` [RFC][PATCH 0/3] delayed wakeup list Eric Dumazet
2011-09-14 13:56 ` Peter Zijlstra
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=20110914133034.687048806@chello.nl \
--to=a.p.zijlstra@chello.nl \
--cc=davem@davemloft.net \
--cc=dvhart@linux.intel.com \
--cc=efault@gmx.de \
--cc=eric.dumazet@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=manfred@colorfullife.com \
--cc=mingo@elte.hu \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox