Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752580AbaBKEgA (ORCPT ); Mon, 10 Feb 2014 23:36:00 -0500 Received: from szxga03-in.huawei.com ([119.145.14.66]:50221 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751970AbaBKEf5 (ORCPT ); Mon, 10 Feb 2014 23:35:57 -0500 Message-ID: <52F9A82F.3060806@huawei.com> Date: Tue, 11 Feb 2014 12:33:51 +0800 From: Weng Meiling User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.0.1 MIME-Version: 1.0 To: Will Deacon CC: Robert Richter , "oprofile-list@lists.sf.net" , "linux-kernel@vger.kernel.org" , Li Zefan , "wangnan0@huawei.com" , "zhangwei(Jovi)" , Huang Qiang , "sdu.liu@huawei.com" Subject: Re: [PATCH] oprofile: check whether oprofile perf enabled in op_overflow_handler() References: <52B3F66D.6060707@huawei.com> <20140113084555.GU20315@rric.localhost> <52D4984B.9090600@huawei.com> <20140114150553.GC20315@rric.localhost> <52D5EC44.30101@huawei.com> <20140115102445.GE20315@rric.localhost> <52D73148.4090408@huawei.com> <52D7A750.50906@huawei.com> <20140116115245.GB8360@rric.localhost> <20140116193652.GD22105@mudshark.cambridge.arm.com> <52D8A56F.1010507@huawei.com> In-Reply-To: <52D8A56F.1010507@huawei.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.24.66] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Will, > >>> how userland can be notified about throttling. Throttling could be >>> worth for operf too, not only for the oprofile kernel driver. >>> > >>> From a quick look it seems there is also code in x86 that dynamically >>> adjusts the rate which might be worth being implemented for ARM too. >> >> Are you referring to the perf_sample_event_took callback? If so, that >> certainly looks worth persuing. I'll stick it on my list, thanks! >> Is there any progress on this work? Because this is important for me. Sorry for trouble you. Thanks! Weng Meiling -- 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/