Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751481AbaDZKXW (ORCPT ); Sat, 26 Apr 2014 06:23:22 -0400 Received: from [119.145.14.66] ([119.145.14.66]:42669 "EHLO szxga03-in.huawei.com" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1750728AbaDZKXT (ORCPT ); Sat, 26 Apr 2014 06:23:19 -0400 Message-ID: <535B88C9.6000908@huawei.com> Date: Sat, 26 Apr 2014 18:22:01 +0800 From: Ding Tianhong User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 MIME-Version: 1.0 To: Catalin Marinas CC: Will Deacon , Peter Zijlstra , Paul Mackerras , Ingo Molnar , Robert Richter , "Arnaldo Carvalho de Melo" , "linux-kernel@vger.kernel.org" , "oprofile-list@lists.sf.net" , "huxinwei@huawei.com" Subject: Re: [PATCH] arm64: add OProfile support References: <535B707F.7020802@huawei.com> <58ED971B-CC04-4BE1-916C-386D219874A8@arm.com> In-Reply-To: <58ED971B-CC04-4BE1-916C-386D219874A8@arm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.177.22.246] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2014/4/26 17:23, Catalin Marinas wrote: > On 26 Apr 2014, at 09:38, Ding Tianhong wrote: >> Add OProfile support for arm64, using the perf backend, and failing back >> to generic timer based sampling if PMU interrupt is not supported. >> >> I have test this patch on Cortex-A53 and Cortex-A57 motherboard, the OProfile >> could work well by PMU irq or arch timer irq. > > This came up before a few times and we also had an implementation but > decided not to merge it. We should rather get the user space oprofile to > use the perf kernel API. > > That’s an old thread, it may have even made it into mainline oprofile > but I haven’t followed the development: > > http://marc.info/?l=oprofile-list&m=133002515616302&w=2 > > Catalin > Ok, I will check it and then decide the next step, thanks for your feedback. Regards Ding -- 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/