Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761946AbXEJWeb (ORCPT ); Thu, 10 May 2007 18:34:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755956AbXEJWeZ (ORCPT ); Thu, 10 May 2007 18:34:25 -0400 Received: from mail.suse.de ([195.135.220.2]:45969 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754954AbXEJWeY (ORCPT ); Thu, 10 May 2007 18:34:24 -0400 To: Maxim Uvarov Cc: LKML Subject: Re: [PATCH] Performance Stats: Kernel patch References: <20070510171947.19532.70784.stgit@localhost.localdomain> From: Andi Kleen Date: 11 May 2007 01:31:44 +0200 In-Reply-To: <20070510171947.19532.70784.stgit@localhost.localdomain> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 769 Lines: 15 Maxim Uvarov writes: > > This data is useful for detecting hyperactivity > patterns between processes. You need a lot better rationale to slow down these important fast paths. Particularly the syscall path is very hot. Is this something that is really generally useful? The context switch counters might be occasionally useful, but strace can you just give the syscall count anyways. Still not sure it really should go into the standard kernel. Perhaps just keep it as a systemtap script? -Andi - 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/