Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation

[PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock · Waiman Long <hidden> · 2014-01-28
[PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-28
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Andi Kleen <hidden> · 2014-01-29
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · George Spelvin <hidden> · 2014-01-29
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-29
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Rik van Riel <hidden> · 2014-01-30
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Tim Chen <hidden> · 2014-01-30
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Peter Zijlstra <peterz@infradead.org> · 2014-01-30
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Tim Chen <hidden> · 2014-01-30
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · George Spelvin <hidden> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Peter Zijlstra <peterz@infradead.org> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Peter Zijlstra <peterz@infradead.org> · 2014-01-30
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Peter Zijlstra <peterz@infradead.org> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Peter Zijlstra <peterz@infradead.org> · 2014-01-31
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Peter Zijlstra <peterz@infradead.org> · 2014-02-03
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Waiman Long <hidden> · 2014-02-06
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Paul E. McKenney <hidden> · 2014-02-07
Re: [PATCH v3 1/2] qspinlock: Introducing a 4-byte queue spinlock implementation · Raghavendra K T <hidden> · 2014-02-03
[PATCH v3 2/2] qspinlock, x86: Enable x86-64 to use queue spinlock · Waiman Long <hidden> · 2014-01-28
Re: [PATCH v3 2/2] qspinlock, x86: Enable x86-64 to use queue spinlock · Rik van Riel <hidden> · 2014-01-30
Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock · Raghavendra K T <hidden> · 2014-01-30
Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock · Waiman Long <hidden> · 2014-01-30
Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock · Raghavendra K T <hidden> · 2014-01-30
Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock · Raghavendra K T <hidden> · 2014-02-03
Re: [PATCH v3 0/2] qspinlock: Introducing a 4-byte queue spinlock · Waiman Long <hidden> · 2014-02-06

From: Peter Zijlstra <peterz@infradead.org>
Date: 2014-02-03 11:41:12
Also in: lkml

On Fri, Jan 31, 2014 at 02:24:33PM -0500, Waiman Long wrote:

Light contention is the only case where the qspinlock may not perform as
good as the ticket spinlock. I know this is the most common case. However, I
would argue that the slowdown, if any, will not be really noticeable. This
is what I will try to find out.

Please also explain why things are slower/faster. Thomas tried to get
you to do so a few months back, but you kept deflecting.

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