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Date: Thu, 18 May 2017 11:02:12 -0700 From: David Carrillo-Cisneros <davidcc@...gle.com> To: Andi Kleen <ak@...ux.intel.com> Cc: linux-kernel <linux-kernel@...r.kernel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Simon Que <sque@...omium.org>, Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...nel.org>, He Kuang <hekuang@...wei.com>, Masami Hiramatsu <mhiramat@...nel.org>, David Ahern <dsa@...ulusnetworks.com>, Namhyung Kim <namhyung@...nel.org>, Stephane Eranian <eranian@...gle.com>, Paul Turner <pjt@...gle.com> Subject: Re: [PATCH 0/7] perf tool: add meta-data header support for pipe-mode On Wed, May 17, 2017 at 10:10 PM, Andi Kleen <ak@...ux.intel.com> wrote: >> The difficulty in pipe mode is that information needs to be written >> sequentially to the pipe. Meta data headers are usually generated >> (and also expected) at the beginning of the file (or piped output). >> To solve this problem, we introduce new synthetic record types, >> one for each meta-data type. The approach is similar to what >> is *ALREADY* used for BUILD_ID and TRACING_DATA. > > The new headers need documentation in Documentation/perf.data-file-format.txt Will do.
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