linux-kernel - Re: [PATCH 0/8] locking/core patches

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Message-Id: <20140210150230.b7f46688093ebc5c45fee870@linux-foundation.org>
Date:	Mon, 10 Feb 2014 15:02:30 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org, Jason Low <jason.low2@...com>,
	Waiman Long <waiman.long@...com>, mingo@...nel.org,
	paulmck@...ux.vnet.ibm.com, torvalds@...ux-foundation.org,
	tglx@...utronix.de, riel@...hat.com, davidlohr@...com,
	hpa@...or.com, andi@...stfloor.org, aswin@...com,
	scott.norton@...com, chegu_vinod@...com
Subject: Re: [PATCH 0/8] locking/core patches

On Mon, 10 Feb 2014 20:58:20 +0100 Peter Zijlstra <peterz@...radead.org> wrote:

> Hi all,
> 
> I would propose merging the following patches...
> 
> The first set is mostly from Jason and tweaks the mutex adaptive
> spinning, AIM7 throughput numbers:
> 
> PRE:  100   2000.04  21564.90 2721.29 311.99     3.12       0.01     0.00     99
> POST: 100   2000.04  42603.85 5142.80 311.99     3.12       0.00     0.00     99

What do these columns represent?  I'm guessing the large improvement
was in context switches?

> The second set is the qrwlock, although mostly rewritten by me. I didn't do
> much with it other than boot and build a kernel. But I like them because
> of the much better worst case preformance.
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