From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BC5F4C61DF7 for ; Thu, 23 Nov 2023 14:42:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8xcslMTMTxdU1w9mzIDZTioDzS94dPEe3gPLHFqNGNo=; b=TcB/+gggDCFprZ 0u5Zi6yEuENQNrdCgFAvWijQtI6ptpZqzmlmUYeD6bHA3Bp+3mjOzrbjF6YSH3gb/Z/2QvP8SXqWl GmX0svGXPMHefG7cDvE4nM1JBHNqHWSiHrg638o+IvB86em375dKbRAZy3s869lZMUv5WC/fHYmhB M6gXN0u59hq9o2p+x1+UGQc4htGLEggqTRLVjwXuBnYsRhB3jWVgj5xs+Wn1JDrrS5eYR6FYrWo5W ONJ/H1T7iLfoo8H+OH/iCvM4D9bCEVcoBWh5TcC7z4m1wQ2QPzSlTRUrmazABQ/PJs5vQnWZWahIv 3Rg3zrTNlYR8KxBoVBeA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r6AuR-0053Sg-0e; Thu, 23 Nov 2023 14:42:27 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r6AuP-0053SF-3C for linux-arm-kernel@bombadil.infradead.org; Thu, 23 Nov 2023 14:42:25 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=xDG0as94/61GcAQJ/F6wz5560ss5Eor9atE+3RmDmoE=; b=VQEBRf41JhcgdcAFh24gD7AXQk QXeVkZUg3OeybNhSk1ekc+aFYGmDy1OoZLSYgl8x+3tNRBMw9BHl+M1qQK19xOKZfovAP+xD+p4xo dudp+6cJY0fiTfDHym0uXtCABG6hh/mTSFTocaZZbaxUrJd4SJSmCMC58DxUMhpqa10ZNpjMwS790 80fL6g52GlGmoWAtSBhf+MCbiWEDJV4s0P7+7z8wpF03x2WlWPIHbfI7BqGChAec1cuGYy1UE8NOK V55EFQSBvvCBeJyPLU4GWCpEa20VVOkn/HAq/fXuM2N+RB2e6Mt0qYiNnDMnzkRjSN5/ojMntfoWV 3M4RTINQ==; Received: from [187.19.173.117] (helo=quaco.ghostprotocols.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1r6AuN-00D3zp-3C; Thu, 23 Nov 2023 14:42:24 +0000 Received: by quaco.ghostprotocols.net (Postfix, from userid 1000) id 925D740094; Thu, 23 Nov 2023 11:42:18 -0300 (-03) Date: Thu, 23 Nov 2023 11:42:18 -0300 From: Arnaldo Carvalho de Melo To: Leo Yan Cc: Adrian Hunter , James Clark , Suzuki K Poulose , Mike Leach , John Garry , Will Deacon , Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 1/2] perf auxtrace: Add 'T' itrace option for timestamp trace Message-ID: References: <20231014074513.1668000-1-leo.yan@linaro.org> <20231014074513.1668000-2-leo.yan@linaro.org> <8a2ea58f-f835-4d1a-8bd6-3a63b3b0db94@intel.com> <2940af18-8bcd-4456-a8ed-e77cade1b160@intel.com> <20231107094852.GA656098@leoy-yangtze.lan> <6fc8bc4c-abc3-45d5-a8c8-045f91adfebf@intel.com> <20231107141808.GD656098@leoy-yangtze.lan> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20231107141808.GD656098@leoy-yangtze.lan> X-Url: http://acmel.wordpress.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Em Tue, Nov 07, 2023 at 10:18:08PM +0800, Leo Yan escreveu: > On Tue, Nov 07, 2023 at 12:16:25PM +0200, Adrian Hunter wrote: > > [...] > > > >>>> "If users know" <- how would users know? Could the kernel > > >>>> or tools also figure it out? > > >>> > > >>> Adrian, I'm trying to go all the outstanding patches, do you still have > > >>> any issues with this series? > > >> > > >> No, although the question wasn't actually answered. I presume users > > >> just have to try the 'T' option and see if it helps. > > > > > > Sometimes, users are software developers in SoC companies, they can > > > know well for the hardware design but are confused why current > > > implementation cannot use timestamp trace. This is the main reason > > > I sent this patch set. > > > > > > An example hardware platform is DB410c [1], we know its CoreSight can > > > support timestamp trace, but if without this adding option 'T', we > > > have no chance to use it due to it its CPU arch is prior to Armv8.4. > > > > perf config might be better than an itrace option, but you decide. > > I understand perf config is a better approach due to users don't need > to bother inputting options after set it once. I will look at it and > respin new patch set. > > Thanks for suggestion! Thanks, applied. - Arnaldo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel