From: Andi Kleen <ak@linux.intel.com>
To: David Carrillo-Cisneros <davidcc@google.com>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Simon Que <sque@chromium.org>, Wang Nan <wangnan0@huawei.com>,
Jiri Olsa <jolsa@kernel.org>, He Kuang <hekuang@huawei.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
David Ahern <dsa@cumulusnetworks.com>,
Namhyung Kim <namhyung@kernel.org>,
Stephane Eranian <eranian@google.com>,
Paul Turner <pjt@google.com>
Subject: Re: [PATCH 0/7] perf tool: add meta-data header support for pipe-mode
Date: Wed, 17 May 2017 22:10:43 -0700 [thread overview]
Message-ID: <20170518051043.GA15563@tassilo.jf.intel.com> (raw)
In-Reply-To: <20170518041602.28689-1-davidcc@google.com>
> 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
-Andi
next prev parent reply other threads:[~2017-05-18 5:10 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-18 4:15 [PATCH 0/7] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
2017-05-18 4:15 ` [PATCH 1/7] perf header: fail on write_padded error David Carrillo-Cisneros
2017-05-18 4:15 ` [PATCH 2/7] perf util: add const modifier to buf in "writen" function David Carrillo-Cisneros
2017-05-18 4:15 ` [PATCH 3/7] perf header: use struct feat_fd for write David Carrillo-Cisneros
2017-05-18 16:13 ` Jiri Olsa
2017-05-18 18:02 ` David Carrillo-Cisneros
2017-05-18 4:15 ` [PATCH 4/7] perf header: use struct feat_fd for print David Carrillo-Cisneros
2017-05-18 4:16 ` [PATCH 5/7] perf header: use struct feat_fd for process and read David Carrillo-Cisneros
2017-05-18 16:13 ` Jiri Olsa
2017-05-18 18:02 ` David Carrillo-Cisneros
2017-05-18 4:16 ` [PATCH 6/7] perf tool: make show-info in perf report a tool attribute David Carrillo-Cisneros
2017-05-18 4:16 ` [PATCH 7/7] perf tools: add feature header record to pipe-mode David Carrillo-Cisneros
2017-05-18 16:12 ` Jiri Olsa
2017-05-18 18:30 ` David Carrillo-Cisneros
2017-05-18 16:13 ` Jiri Olsa
2017-05-18 16:13 ` Jiri Olsa
2017-05-18 18:29 ` David Carrillo-Cisneros
2017-05-18 16:13 ` Jiri Olsa
2017-05-18 16:13 ` Jiri Olsa
2017-05-18 18:29 ` David Carrillo-Cisneros
2017-05-18 5:10 ` Andi Kleen [this message]
2017-05-18 18:02 ` [PATCH 0/7] perf tool: add meta-data header support for pipe-mode David Carrillo-Cisneros
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