Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752130Ab1DRUhn (ORCPT ); Mon, 18 Apr 2011 16:37:43 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:40025 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751348Ab1DRUhl (ORCPT ); Mon, 18 Apr 2011 16:37:41 -0400 Date: Mon, 18 Apr 2011 22:37:26 +0200 From: Ingo Molnar To: Linus Torvalds Cc: Andrew Lutomirski , linux-kernel@vger.kernel.org, Andi Kleen , x86 Subject: Re: [RFT] Please test rdtsc on various x86-64 hardware (app included) Message-ID: <20110418203726.GA30868@elte.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 868 Lines: 26 * Linus Torvalds 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/