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
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