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Thu, 26 Mar 2020 07:33:58 -0700 (PDT) Received: from quaco.ghostprotocols.net ([179.97.37.151]) by smtp.gmail.com with ESMTPSA id x89sm1672947qtd.43.2020.03.26.07.33.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Mar 2020 07:33:57 -0700 (PDT) From: Arnaldo Carvalho de Melo X-Google-Original-From: Arnaldo Carvalho de Melo Received: by quaco.ghostprotocols.net (Postfix, from userid 1000) id 62CD840061; Thu, 26 Mar 2020 11:33:55 -0300 (-03) Date: Thu, 26 Mar 2020 11:33:55 -0300 To: Hagen Paul Pfeifer Cc: linux-kernel@vger.kernel.org, Andi Kleen , Adrian Hunter , Jiri Olsa Subject: Re: [PATCH] perf script: introduce deltatime option Message-ID: <20200326143355.GB6411@kernel.org> References: <20200204173709.489161-1-hagen@jauu.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200204173709.489161-1-hagen@jauu.net> X-Url: http://acmel.wordpress.com Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Tue, Feb 04, 2020 at 06:37:09PM +0100, Hagen Paul Pfeifer escreveu: > For some kind of analysis a deltatime output is more human friendly and reduce > the cognitive load for further analysis. > > The following output demonstrate the new option "deltatime": calculate > the time difference in relation to the previous event. > > $ perf script --deltatime > test 2525 [001] 0.000000: sdt_libev:ev_add: (5635e72a5ebd) > test 2525 [001] 0.000091: sdt_libev:epoll_wait_enter: (5635e72a76a9) > test 2525 [001] 1.000051: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1 > test 2525 [001] 0.000685: sdt_libev:ev_add: (5635e72a5ebd) > test 2525 [001] 0.000048: sdt_libev:epoll_wait_enter: (5635e72a76a9) > test 2525 [001] 1.000104: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1 > test 2525 [001] 0.003895: sdt_libev:epoll_wait_enter: (5635e72a76a9) > test 2525 [001] 0.996034: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1 > test 2525 [001] 0.000058: sdt_libev:epoll_wait_enter: (5635e72a76a9) > test 2525 [001] 1.000004: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1 > test 2525 [001] 0.000064: sdt_libev:epoll_wait_enter: (5635e72a76a9) > test 2525 [001] 0.999934: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1 > test 2525 [001] 0.000056: sdt_libev:epoll_wait_enter: (5635e72a76a9) > test 2525 [001] 0.999930: sdt_libev:epoll_wait_return: (5635e72a772e) arg1=1 You forgot to update the man page, I did it, tested and applied, thanks. - Arnaldo diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index db6a36aac47e..4af255bb0977 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -390,6 +390,9 @@ include::itrace.txt[] --reltime:: Print time stamps relative to trace start. +--deltatime:: + Print time stamps relative to previous event. + --per-event-dump:: Create per event files with a "perf.data.EVENT.dump" name instead of printing to stdout, useful, for instance, for generating flamegraphs.