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Message-ID: <20150816162801.GR31018@brightrain.aerifal.cx>
Date: Sun, 16 Aug 2015 12:28:01 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] replace a mfence instruction by an xchg
instruction
On Sat, Aug 15, 2015 at 08:51:41AM +0200, Jens Gustedt wrote:
> according to the wisdom of the Internet, e.g
>
> https://peeterjoot.wordpress.com/2009/12/04/intel-memory-ordering-fence-instructions-and-atomic-operations/
>
> a mfence instruction is about 3 times slower than an xchg instruction.
I can't find where the article makes this claim. Could you point out
what part you're referring to?
Rich
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