From: Waiman Long <waiman.long@hpe.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>, <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ding Tianhong <dingtianhong@huawei.com>,
Jason Low <jason.low2@hpe.com>,
Davidlohr Bueso <dave@stgolabs.net>,
"Paul E. McKenney" <paulmck@us.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Will Deacon <Will.Deacon@arm.com>,
Tim Chen <tim.c.chen@linux.intel.com>
Subject: Re: [PATCH v2 0/4] locking/mutex: Enable optimistic spinning of lock waiter
Date: Tue, 16 Feb 2016 20:39:18 -0500 [thread overview]
Message-ID: <56C3CF46.2090307@hpe.com> (raw)
In-Reply-To: <20160216085111.GR6357@twins.programming.kicks-ass.net>
On 02/16/2016 03:51 AM, Peter Zijlstra wrote:
> On Fri, Feb 12, 2016 at 12:32:11PM -0500, Waiman Long wrote:
>> My own test on a 4-socket E7-4820 v3 system showed a regression of
>> about 4% in the high_systime workload with Peter's patch which this
>> new patch effectively eliminates.
>>
>> Testing on an 8-socket Westmere-EX server, however, has performance
>> change from -9% to than +140% on the fserver workload of AIM7
>> depending on how the system was set up.
> Subject: [lkp] [locking/mutex] aaca135480: -72.9% fsmark.files_per_sec
>
> My patch also generated the above email.
>
> Please also test that benchmark against this approach.
>
I will ran that benchmark on my patch.
Cheers,
Longman
next prev parent reply other threads:[~2016-02-17 1:54 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-12 17:32 [PATCH v2 0/4] locking/mutex: Enable optimistic spinning of lock waiter Waiman Long
2016-02-12 17:32 ` [PATCH v2 1/4] locking/mutex: Add waiter parameter to mutex_optimistic_spin() Waiman Long
2016-02-12 20:23 ` Peter Zijlstra
2016-02-12 22:14 ` Davidlohr Bueso
2016-02-13 12:10 ` Peter Zijlstra
2016-02-13 18:14 ` Davidlohr Bueso
2016-02-16 2:15 ` Jason Low
2016-02-16 2:22 ` Jason Low
2016-02-16 8:53 ` Peter Zijlstra
2016-02-17 1:40 ` Waiman Long
2016-02-15 22:06 ` Waiman Long
2016-02-12 20:40 ` Peter Zijlstra
2016-02-15 23:55 ` Waiman Long
2016-02-16 3:00 ` Jason Low
2016-02-16 3:30 ` Waiman Long
2016-02-12 22:02 ` Davidlohr Bueso
2016-02-12 22:09 ` Davidlohr Bueso
2016-02-16 0:03 ` Waiman Long
2016-02-12 17:32 ` [PATCH v2 2/4] locking/mutex: Enable optimistic spinning of woken task in wait queue Waiman Long
2016-02-12 17:32 ` [PATCH v2 3/4] locking/mutex: Avoid missed wakeup of mutex waiter Waiman Long
2016-02-12 17:32 ` [PATCH v2 4/4] sched/fair: Abort wakeup when task is no longer in a sleeping state Waiman Long
2016-02-12 20:18 ` Peter Zijlstra
2016-02-12 21:22 ` Waiman Long
2016-02-13 12:09 ` Peter Zijlstra
2016-02-16 8:51 ` [PATCH v2 0/4] locking/mutex: Enable optimistic spinning of lock waiter Peter Zijlstra
2016-02-17 1:39 ` Waiman Long [this message]
2016-03-22 3:19 ` Waiman Long
2016-03-22 9:59 ` Peter Zijlstra
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