linux-kernel - Re: [RFT] Please test rdtsc on various x86-64 hardware (app included)

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Message-ID: <20110419003839.GA1624@x4.trippels.de>
Date:	Tue, 19 Apr 2011 02:38:39 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Lutomirski <luto@....edu>, linux-kernel@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>, x86 <x86@...nel.org>
Subject: Re: [RFT] Please test rdtsc on various x86-64 hardware (app included)

On 2011.04.18 at 22:37 +0200, Ingo Molnar wrote:
> 
> * Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> 
> > Some opteron love would be good, but I don't have access to any right here.
> 
> Here's one:

And another:

CPU vendor   : AuthenticAMD
CPU model    : AMD Phenom(tm) II X4 955 Processor
CPU stepping : 2
TSC flags    : tsc rdtscp constant_tsc nonstop_tsc
Using mfence_rdtsc because you don't have an Intel CPU
Will test the "mfence;rdtsc" clock.
Now test passed  : margin 208 with 8769512 samples
Load3 test passed: margin 339 with 4880373 samples
Load test passed : margin 193 with 7189144 samples
Store test passed: margin 192 with 7149930 samples

-- 
Markus
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