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Re: [PATCH 3/3] Remove x86 assembler rwlock code

From: Siddhesh Poyarekar <siddhesh at redhat dot com>
To: Andi Kleen <andi at firstfloor dot org>
Cc: libc-alpha at sourceware dot org, carlos at redhat dot com, Andi Kleen <ak at odo dot jf dot intel dot com>
Date: Wed, 18 Jun 2014 14:41:05 +0530
Subject: Re: [PATCH 3/3] Remove x86 assembler rwlock code
Authentication-results: sourceware.org; auth=none
References: <1402532621-26622-1-git-send-email-andi at firstfloor dot org> <1402532621-26622-4-git-send-email-andi at firstfloor dot org>

On Wed, Jun 11, 2014 at 05:23:41PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@odo.jf.intel.com>
> 
> With the recent tuning the C version of rwlocks is basically the same
> performance as the x86 assembler version for uncontended locks (with a
> a few cycles near the run-to-run variability). For others it should not
> matter anyways.
> 
> So remove the assembler code and use the C version like other
> architectures.

Benchmark results?

Siddhesh

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Follow-Ups:
- Re: [PATCH 3/3] Remove x86 assembler rwlock code
  - From: Andi Kleen

References:
- Updated rwlock elision patchkit
  - From: Andi Kleen
- [PATCH 3/3] Remove x86 assembler rwlock code
  - From: Andi Kleen

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