From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752379Ab3IILSC (ORCPT ); Mon, 9 Sep 2013 07:18:02 -0400 Received: from merlin.infradead.org ([205.233.59.134]:48264 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751219Ab3IILSB (ORCPT ); Mon, 9 Sep 2013 07:18:01 -0400 Date: Mon, 9 Sep 2013 13:17:49 +0200 From: Peter Zijlstra To: Jiri Olsa Cc: linux-kernel@vger.kernel.org, Corey Ashford , Frederic Weisbecker , Ingo Molnar , Namhyung Kim , Paul Mackerras , Arnaldo Carvalho de Melo , Andi Kleen , David Ahern Subject: Re: [PATCHv2 00/25] perf tool: Add support for multiple data file storage Message-ID: <20130909111749.GP31370@twins.programming.kicks-ass.net> References: <1378031796-17892-1-git-send-email-jolsa@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1378031796-17892-1-git-send-email-jolsa@redhat.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 01, 2013 at 12:36:11PM +0200, Jiri Olsa wrote: > hi, > sending the support for multiple file storage. Initial > RFC is here: > http://marc.info/?l=linux-kernel&m=137408381902423&w=2 > > v2 changes: > - reworked perf mmap size setup to be able to get > the mmap size value easily later > - added perf.data read/write test for v2 and v3 > for both endianity > - added record '-M time' support So this 0/n post seems to have forgotten to list the rationale for doing all this.. The only reason I wanted this is so that each thread can write its own data. The current one file thing is an immense bottle-neck for big machines. However your earlier patches didn't do it because of that -- I forgot why they did it and you're now not telling.