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    Subject[PATCH v2 0/5] perf tools: add meta-data header support in pipe mode
    This patch series adds meta-data support to perf record/report in pipe
    perf record -o - foo | perf inject -b | perf report -i -

    We had meta-data (information about host configuration, perf tool version,...)
    in regular (file) mode but it was lacking in pipe mode. This patch series fixes

    In pipe mode, there is no meta-data header structures at the beginning of the
    streamed data given we cannot seek in a pipe. Instead, we need to create pseudo
    record types for each of the possible features, e.g., hostname, cpuid, event_desc,
    and so on. Those pseudo records are guaranteed to be before any actual sample
    records, therefore perf report/annotate are guaranteed to get the information
    they need before processing the first sample.

    The series also fixes perf inject to actually inject build-ids and buildid-list
    to work better with pipe mode, i.e., print the build-ids.

    With this series:

    $ perf record -o - noploop 2 | perf inject -b | perf report -i -
    # ========
    # captured on: Fri Jan 20 18:13:55 2012
    # ========
    # hostname : quad
    # os release : 3.2.0-rc7-tip
    # perf version : 3.2.0
    # arch : x86_64
    # nrcpus online : 4
    # nrcpus avail : 4
    # cpudesc : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
    # cpuid : GenuineIntel,6,15,11
    # total memory : 8092884 kB
    # HEADER_CPU_TOPOLOGY info available, use -I to display
    noploop for 2 seconds
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.084 MB - (~3677 samples) ]
    99.80% noploop noploop [.] noploop
    0.19% noploop [kernel.kallsyms] [k] radix_tree_gang_lookup

    V2 is just a rebase to 3.4.0-rc7.

    Signed-off-by: Stephane Eranian <>

    Stephane Eranian (6):
    perf inject: fix broken perf inject -b
    perf tools: fix piped mode read code
    perf record: add meta-data support for pipe-mode
    perf: make perf buildid-list work better with pipe mode


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