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From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Lutomirski <luto@mit.edu>,
	linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>,
	x86 <x86@kernel.org>
Subject: Re: [RFT] Please test rdtsc on various x86-64 hardware (app included)
Date: Mon, 18 Apr 2011 22:37:26 +0200	[thread overview]
Message-ID: <20110418203726.GA30868@elte.hu> (raw)
In-Reply-To: <BANLkTi=hpNy3iA+49N90dbU4f0_L2RVJNQ@mail.gmail.com>


* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> Some opteron love would be good, but I don't have access to any right here.

Here's one:

 CPU vendor   : AuthenticAMD
 CPU model    : Quad-Core AMD Opteron(tm) Processor 8356
 CPU stepping : 3
 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 252 with 7198256 samples
 Load3 test passed: margin 536 with 1833844 samples
 Load test passed : margin 219 with 3097882 samples
 Store test passed: margin 250 with 3553454 samples

Thanks,

	Ingo

  reply	other threads:[~2011-04-18 20:37 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-18 19:32 Andrew Lutomirski
2011-04-18 20:16 ` Linus Torvalds
2011-04-18 20:37   ` Ingo Molnar [this message]
2011-04-19  0:38     ` Markus Trippelsdorf
2011-04-18 20:23 ` Colin Walters
2011-04-18 20:27   ` Andrew Lutomirski
2011-04-18 20:35     ` Colin Walters
2011-04-18 20:39       ` Andrew Lutomirski
2011-04-18 22:10 ` Andi Kleen
2011-04-19  2:15   ` Andrew Lutomirski
2011-04-19  0:49 ` Mihai Donțu
2011-04-19  8:10 ` Frank Kingswood
2011-04-22 14:33 ` Jan Ceuleers
2011-04-19  5:06 George Spelvin
2011-04-19  6:09 ` George Spelvin

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