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 X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFB09C46464 for ; Mon, 13 Aug 2018 17:46:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 756692171F for ; Mon, 13 Aug 2018 17:46:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 756692171F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730505AbeHMU35 (ORCPT ); Mon, 13 Aug 2018 16:29:57 -0400 Received: from foss.arm.com ([217.140.101.70]:34566 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730439AbeHMU35 (ORCPT ); Mon, 13 Aug 2018 16:29:57 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 995407A9; Mon, 13 Aug 2018 10:46:44 -0700 (PDT) Received: from dupont (dupont.austin.arm.com [10.118.16.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BFBCE3F73C; Mon, 13 Aug 2018 10:46:43 -0700 (PDT) Date: Mon, 13 Aug 2018 12:46:42 -0500 From: Kim Phillips To: Mathieu Poirier Cc: peterz@infradead.org, acme@kernel.org, mingo@redhat.com, tglx@linutronix.de, alexander.shishkin@linux.intel.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, will.deacon@arm.com, mark.rutland@arm.com, jolsa@redhat.com, namhyung@kernel.org, adrian.hunter@intel.com, ast@kernel.org, gregkh@linuxfoundation.org, hpa@zytor.com, suzuki.poulosi@arm.com, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v3 0/7] perf: Add ioctl for PMU driver configuration Message-Id: <20180813124642.3d49c082a95fc294d926016e@arm.com> In-Reply-To: <1531950487-24554-1-git-send-email-mathieu.poirier@linaro.org> References: <1531950487-24554-1-git-send-email-mathieu.poirier@linaro.org> Organization: Arm X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 18 Jul 2018 15:48:00 -0600 Mathieu Poirier wrote: > This set adds the capability to communiate event specific configuration > to the PMU kernel driver using an ioctl(). The functionatlity is made > generic enough for anyone to use but is targeted at the identification > of CoreSight sinks when operating in CPU-wide trace scenarios. > > --- > Changes for V3: > . Return an error for CPU-wide scenarios while the feature is being > implemented (Kim) Hi, I'm giving this series a short test-drive on Juno. It yields success for the --per-thread case..: $ sudo taskset -c 0 ./perf record -e cs_etm/@20010000.etf/ --per-thread uname -a Linux juno 4.18.0-rc8-00011-gb82af52c4b35-dirty #147 SMP PREEMPT Thu Aug 9 11:20:37 CDT 2018 aarch64 GNU/Linux [ perf record: Woken up 0 times to write data ] Warning: AUX data lost 1 times out of 2! [ perf record: Captured and wrote 0.067 MB perf.data ] $ ..but not for CPU-wide?: $ sudo taskset -c 0 ./perf record -e cs_etm/@20010000.etf/ uname -a failed to mmap with 12 (Cannot allocate memory) $ sudo taskset -c 0 ./perf record -e cs_etm/@20010000.etf/ -C 0 uname -a failed to mmap with 12 (Cannot allocate memory) $ Thanks, Kim