From: Jason Low <jason.low2@hp.com>
To: Waiman Long <Waiman.Long@hp.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
linux-kernel@vger.kernel.org,
Scott J Norton <scott.norton@hp.com>,
Douglas Hatch <doug.hatch@hp.com>,
jason.low2@hp.com
Subject: Re: [PATCH v2] locking/rwsem: reduce spinlock contention in wakeup after up_read/up_write
Date: Thu, 23 Apr 2015 13:42:38 -0700 [thread overview]
Message-ID: <1429821758.20330.6.camel@j-VirtualBox> (raw)
In-Reply-To: <1429813449-19641-1-git-send-email-Waiman.Long@hp.com>
On Thu, 2015-04-23 at 14:24 -0400, Waiman Long wrote:
> The table below shows the % improvement in throughput (1100-2000 users)
> in the various AIM7's workloads:
>
> Workload % increase in throughput
Missing table here? :)
> ---
> include/linux/osq_lock.h | 5 +++
> kernel/locking/rwsem-xadd.c | 72 ++++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 76 insertions(+), 1 deletions(-)
>
> v1->v2:
> - Add a memory barrier before calling spin_trylock for proper memory
> ordering.
next prev parent reply other threads:[~2015-04-23 20:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-23 18:24 [PATCH v2] locking/rwsem: reduce spinlock contention in wakeup after up_read/up_write Waiman Long
2015-04-23 20:42 ` Jason Low [this message]
2015-04-24 14:55 ` Waiman Long
2015-04-23 21:31 ` Davidlohr Bueso
2015-04-24 14:56 ` Waiman Long
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=1429821758.20330.6.camel@j-VirtualBox \
--to=jason.low2@hp.com \
--cc=Waiman.Long@hp.com \
--cc=doug.hatch@hp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=scott.norton@hp.com \
/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.