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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60F69C46467 for ; Wed, 11 Jan 2023 11:39:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232520AbjAKLjO (ORCPT ); Wed, 11 Jan 2023 06:39:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232319AbjAKLiw (ORCPT ); Wed, 11 Jan 2023 06:38:52 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9DFE81ADB2; Wed, 11 Jan 2023 03:35:09 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 059EEFEC; Wed, 11 Jan 2023 03:35:51 -0800 (PST) Received: from [10.57.45.242] (unknown [10.57.45.242]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D720F3F587; Wed, 11 Jan 2023 03:35:05 -0800 (PST) Message-ID: <4e6a0766-52d1-effa-9986-af6b3ca29f1a@arm.com> Date: Wed, 11 Jan 2023 11:35:04 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2 Subject: Re: [PATCH v3 0/7] perf cs_etm: Basic support for virtual/kernel timestamps Content-Language: en-US To: Tanmay Jagdale , "linux-perf-users@vger.kernel.org" , "leo.yan@linaro.org" , "mike.leach@linaro.org" Cc: Sunil Kovvuri Goutham , George Cherian , Linu Cherian , Bharat Bhushan , Mathieu Poirier , Suzuki K Poulose , John Garry , Will Deacon , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , "coresight@lists.linaro.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" References: <20230103162042.423694-1-james.clark@arm.com> From: James Clark In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/01/2023 16:42, Tanmay Jagdale wrote: > Hi James, > [...] >> base-commit: 09e6f9f98370be9a9f8978139e0eb1be87d1125f > I have tested this patch set on our platform and able to see updated > timestamp values in perf script's output. > > $ perf record -e cs_etm/cycacc,@tmc_etr0/k -C 9 taskset -c 9 sleep 2 > $ perf script --itrace=i1ns --ns -Fcomm,tid,pid,time,cpu,event,ip,sym,addr,symoff,flags,callindent > > At certain points noticed that hardware emits same timestamp packets > but with updated cycle count (CC) values. A small snippet of the log: > > Idx:100; ID:12; I_ADDR_S_IS0 : Address, Short, IS0.; Addr=0xFFFF8000086A761C ~[0x761C] > Idx:103; ID:12; I_TIMESTAMP : Timestamp.; Updated val = 0x2f373e37e02; CC=0x3d > Idx:107; ID:12; I_ATOM_F2 : Atom format 2.; EN > Idx:108; ID:12; I_TIMESTAMP : Timestamp.; Updated val = 0x2f373e37e02; CC=0x3f > Idx:112; ID:12; I_ATOM_F1 : Atom format 1.; N > Idx:113; ID:12; I_TIMESTAMP : Timestamp.; Updated val = 0x2f373e37e02; CC=0x45 > Idx:116; ID:12; I_ATOM_F1 : Atom format 1.; E > Idx:117; ID:12; I_ADDR_S_IS0 : Address, Short, IS0.; Addr=0xFFFF8000086B52D4 ~[0x152D4] Hi Tanmay, Are you able to email or send a download link with the perf archive and perf.data file of this recording please? Thanks James