linux-kernel - Re: [PATCH v3 2/7] locking/pvqspinlock: Add pending bit support

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Date:	Sun, 26 Jul 2015 16:09:52 -0700
From:	Davidlohr Bueso <dave@...olabs.net>
To:	Waiman Long <Waiman.Long@...com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, Scott J Norton <scott.norton@...com>,
	Douglas Hatch <doug.hatch@...com>
Subject: Re: [PATCH v3 2/7] locking/pvqspinlock: Add pending bit support

On Wed, 2015-07-22 at 16:12 -0400, Waiman Long wrote:
> Using a locking microbenchmark on the same system, the locking
> rates in (kops/s) were:
> 
>   Threads		Rate w/o patch	Rate with patch
>   -------		--------------	---------------
>   2 (same socket)	  6,515,265	  7,077,476
>   2 (diff sockets)	  2,967,145	  4,353,851

At this level stddev would be nice to have, as these sort of things have
a lot of variation.

Out of general interest, are these microbenchmarks available? Would you
care to add something like that to perf-bench? I assume they would
probably be x86 specific.

Thanks,
Davidlohr

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