linux-kernel - Re: [PATCH v5 00/16] perf tool: add meta-data header support for pipe-mode

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Date:   Tue, 11 Jul 2017 19:39:03 -0600
From:   David Ahern <dsahern@...il.com>
To:     David Carrillo-Cisneros <davidcc@...gle.com>,
        linux-kernel@...r.kernel.org
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...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>,
        Namhyung Kim <namhyung@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>
Subject: Re: [PATCH v5 00/16] perf tool: add meta-data header support for
 pipe-mode

On 7/11/17 5:52 PM, David Carrillo-Cisneros wrote:
...
> (This is a rebased and updated version of Stephane Eranian's version
>  in https://patchwork.kernel.org/patch/1499081/)

...
> With this series, it is possible to get:
>   $ perf record -o - -e cycles sleep 1 | perf report --stdio --header
>   # ========
>   # captured on: Mon May 22 16:33:43 2017
>   # ========
>   #
>   # hostname : my_hostname
>   # os release : 4.11.0-dbx-up_perf
>   # perf version : 4.11.rc6.g6277c80
>   # arch : x86_64
>   # nrcpus online : 72
>   # nrcpus avail : 72
>   # cpudesc : Intel(R) Xeon(R) CPU E5-2696 v3 @ 2.30GHz
>   # cpuid : GenuineIntel,6,63,2
>   # total memory : 263457192 kB
>   # cmdline : /root/perf record -e cycles sleep 1 
>   # event : name = cycles, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, enable_on_exec = 1, task = 1, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1
>   # CPU_TOPOLOGY info available, use -I to display
>   # NUMA_TOPOLOGY info available, use -I to display
>   # pmu mappings: intel_bts = 6, cpu = 4, msr = 49, uncore_cbox_10 = 36, [SNIP]
>   [ perf record: Woken up 1 times to write data ]
>   [ perf record: Captured and wrote 0.000 MB - ]
>   ...

I like it; much needed functionality.

Acked-by: David Ahern <dsahern@...il.com>