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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 84383C43381 for ; Sat, 16 Mar 2019 14:16:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 54BB521900 for ; Sat, 16 Mar 2019 14:16:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726937AbfCPOQg (ORCPT ); Sat, 16 Mar 2019 10:16:36 -0400 Received: from mga07.intel.com ([134.134.136.100]:7416 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726330AbfCPOQf (ORCPT ); Sat, 16 Mar 2019 10:16:35 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Mar 2019 07:16:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,486,1544515200"; d="scan'208";a="123224474" Received: from linux.intel.com ([10.54.29.200]) by orsmga007.jf.intel.com with ESMTP; 16 Mar 2019 07:16:35 -0700 Received: from [10.252.10.233] (abudanko-mobl.ccr.corp.intel.com [10.252.10.233]) by linux.intel.com (Postfix) with ESMTP id D2378580310; Sat, 16 Mar 2019 07:16:32 -0700 (PDT) Subject: [PATCH v9 09/12] perf record: implement -z,--compression_level[=] option From: Alexey Budankov To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Namhyung Kim , Alexander Shishkin , Ingo Molnar , Peter Zijlstra , Andi Kleen , linux-kernel References: Organization: Intel Corp. Message-ID: Date: Sat, 16 Mar 2019 17:16:26 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implemented -z,--compression_level[=] option that enables compression of mmaped kernel data buffers content in runtime during perf record mode collection. Default option value is 1 (fastest compression). Compression overhead has been measured for serial and AIO streaming when profiling matrix multiplication workload: ------------------------------------------------------------- | SERIAL | AIO-1 | ----------------------------------------------------------------| |-z | OVH(x) | ratio(x) size(MiB) | OVH(x) | ratio(x) size(MiB) | |---------------------------------------------------------------| | 0 | 1,00 | 1,000 179,424 | 1,00 | 1,000 187,527 | | 1 | 1,04 | 8,427 181,148 | 1,01 | 8,474 188,562 | | 2 | 1,07 | 8,055 186,953 | 1,03 | 7,912 191,773 | | 3 | 1,04 | 8,283 181,908 | 1,03 | 8,220 191,078 | | 5 | 1,09 | 8,101 187,705 | 1,05 | 7,780 190,065 | | 8 | 1,05 | 9,217 179,191 | 1,12 | 6,111 193,024 | ----------------------------------------------------------------- OVH = (Execution time with -z N) / (Execution time with -z 0) ratio - compression ratio size - number of bytes that was compressed size ~= trace size x ratio Signed-off-by: Alexey Budankov --- tools/perf/Documentation/perf-record.txt | 5 +++++ tools/perf/builtin-record.c | 25 ++++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 18fceb49434e..0567bacc2ae6 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -471,6 +471,11 @@ Also at some cases executing less trace write syscalls with bigger data size can shorter than executing more trace write syscalls with smaller data size thus lowering runtime profiling overhead. +-z:: +--compression-level[=n]:: +Produce compressed trace using specified level n (default: 1 - fastest compression, +22 - smallest trace) + --all-kernel:: Configure all used events to run in kernel space. diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 2e083891affa..7258f2964a3b 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -440,6 +440,26 @@ static int record__mmap_flush_parse(const struct option *opt, return 0; } +#ifdef HAVE_ZSTD_SUPPORT +static unsigned int comp_level_default = 1; +static int record__parse_comp_level(const struct option *opt, + const char *str, + int unset) +{ + struct record_opts *opts = (struct record_opts *)opt->value; + + if (unset) { + opts->comp_level = 0; + } else { + if (str) + opts->comp_level = strtol(str, NULL, 0); + if (!opts->comp_level) + opts->comp_level = comp_level_default; + } + + return 0; +} +#endif static unsigned int comp_level_max = 22; static int record__comp_enabled(struct record *rec) @@ -2169,6 +2189,11 @@ static struct option __record_options[] = { OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu", "Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer", record__parse_affinity), +#ifdef HAVE_ZSTD_SUPPORT + OPT_CALLBACK_OPTARG('z', "compression-level", &record.opts, &comp_level_default, + "n", "Produce compressed trace using specified level (default: 1 - fastest compression, 22 - smallest trace)", + record__parse_comp_level), +#endif OPT_END() }; -- 2.20.1