From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934790AbeCELio (ORCPT ); Mon, 5 Mar 2018 06:38:44 -0500 Received: from mga07.intel.com ([134.134.136.100]:61868 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933036AbeCELil (ORCPT ); Mon, 5 Mar 2018 06:38:41 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,426,1515484800"; d="scan'208";a="32474943" Subject: [PATCH v1 2/3] perf report: extend raw dump (-D) out with switch out event type From: Alexey Budankov To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo Cc: Alexander Shishkin , Jiri Olsa , Namhyung Kim , Andi Kleen , linux-kernel , Dmitri Prokhorov References: <6db586f3-36da-285c-b008-f2722419fbf8@linux.intel.com> Organization: Intel Corp. Message-ID: <5ccb869f-e8fa-afc5-c113-4cf9e9ac74e2@linux.intel.com> Date: Mon, 5 Mar 2018 14:38:37 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <6db586f3-36da-285c-b008-f2722419fbf8@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Print additional 'yield' tag for PERF_RECORD_SWITCH[_CPU_WIDE] OUT records when event header misc field contains PERF_RECORD_MISC_SWITCH_OUT_YIELD bit set designating synchronization context switch out event: perf report -D -i system-wide.perf: ... 0x1b9c50 [0x30]: event: 15 . . ... raw event: size 48 bytes . 0000: 0f 00 00 00 00 20 30 00 01 1e 00 00 01 1e 00 00 ..... 0......... . 0010: 00 00 00 00 00 00 00 00 85 ae d4 e3 3e 0e 00 00 ............>... . 0020: 54 00 00 00 00 00 00 00 05 00 00 00 00 00 00 00 T............... 5 15663273127557 0x1b9c50 [0x30]: PERF_RECORD_SWITCH_CPU_WIDE OUT next pid/tid: 7681/7681 0x2646c0 [0x30]: event: 15 . . ... raw event: size 48 bytes . 0000: 0f 00 00 00 00 60 30 00 00 00 00 00 00 00 00 00 .....`0......... . 0010: 00 1e 00 00 00 1e 00 00 29 1e d5 e3 3e 0e 00 00 ........)...>... . 0020: 56 00 00 00 00 00 00 00 07 00 00 00 00 00 00 00 V............... 7 15663273156137 0x2646c0 [0x30]: PERF_RECORD_SWITCH_CPU_WIDE OUT yield next pid/tid: 0/0 ... Signed-off-by: Alexey Budankov --- tools/include/uapi/linux/perf_event.h | 5 +++++ tools/perf/util/event.c | 4 +++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 6f873503552d..0339c829cda5 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -654,6 +654,11 @@ struct perf_event_mmap_page { * perf_event_attr::precise_ip. */ #define PERF_RECORD_MISC_EXACT_IP (1 << 14) +/* + * Indicates that thread explicitly yielded cpu due to + * a call of some synchronization API e.g. futex system call + */ +#define PERF_RECORD_MISC_SWITCH_OUT_YIELD (1 << 14) /* * Reserve the last bit to indicate some extended misc field */ diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index f0a6cbd033cc..af5a85d56446 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -1421,7 +1421,9 @@ size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) { bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; - const char *in_out = out ? "OUT" : "IN "; + const char *in_out = !out ? "IN " : + !(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_YIELD) ? + "OUT" : "OUT yield"; if (event->header.type == PERF_RECORD_SWITCH) return fprintf(fp, " %s\n", in_out);