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
next prev parent 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 [RFT] Please test rdtsc on various x86-64 hardware (app included) 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
-- strict thread matches above, loose matches on Subject: below --
2011-04-19 5:06 George Spelvin
2011-04-19 6:09 ` George Spelvin
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