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    SubjectRe: [PATCH V4 18/24] perf tools: Add Intel BTS support
    Em Tue, May 05, 2015 at 04:51:41PM -0300, Arnaldo Carvalho de Melo escreveu:
    > Em Thu, Apr 30, 2015 at 05:37:41PM +0300, Adrian Hunter escreveu:
    > > Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
    > > ---
    > > tools/perf/Documentation/intel-bts.txt | 69 +++
    > >
    > > diff --git a/tools/perf/Documentation/intel-bts.txt b/tools/perf/Documentation/intel-bts.txt
    > > new file mode 100644
    > > index 0000000..7a79d36
    > > --- /dev/null
    > > +++ b/tools/perf/Documentation/intel-bts.txt
    > > @@ -0,0 +1,69 @@
    > > +Intel Branch Trace Store
    > > +========================
    > > +
    > > +perf record
    > > +===========
    > > +
    > > +new event
    > > +---------
    > > +
    > > +The Intel BTS kernel driver creates a new PMU for Intel BTS. The perf record
    > > +option is:
    > > +
    > > + -e intel_bts//
    >
    > So, I applied up where Jiri acked, and will process more, but without
    > digging deep, lemme ask you you could please reorder the patches so that
    > what is available in more machines can be tested first, i.e. I think
    > that on this machine:
    >
    > [acme@ssdandy ~]$ perf report --header --stdio
    > Error:
    > The perf.data file has no samples!
    > # ========
    > # captured on: Tue May 5 16:35:13 2015
    > # hostname : ssdandy.ghostprotocols.net
    > # os release : 4.0.0-rc6+
    > # perf version : 4.0.rc6.gef42845
    > # arch : x86_64
    > # nrcpus online : 8
    > # nrcpus avail : 8
    > # cpudesc : Intel(R) Core(TM) i7-2920XM CPU @ 2.50GHz
    > # cpuid : GenuineIntel,6,42,7
    > # total memory : 16318708 kB
    > # cmdline : /home/acme/bin/perf record --per-thread -e intel_bts//u ls
    > # event : name = intel_bts//u, , type = 7, size = 112, { sample_period,
    > # sample_freq } = 4000, sample_type = IP|TID|PERIOD, disabled = 1,
    > # exclude_kernel = 1, exclude_hv = 1, mmap = 1, comm =
    > # HEADER_CPU_TOPOLOGY info available, use -I to display
    > # HEADER_NUMA_TOPOLOGY info available, use -I to display
    > # pmu mappings: cpu = 4, intel_bts = 7, software = 1, power = 6,
    > # tracepoint = 2, breakpoint = 5
    > # ========
    > #
    > (END)
    >
    > It has BTS on the cpuinfo and yeah, intel_bts is there on the pmu
    > mappings.
    >
    > So, this is what I have from you already merged:
    >
    > [acme@ssdandy linux]$ git log --oneline --author hunter | head -20
    > 030026db927b perf record: Add AUX area tracing Snapshot Mode support
    > 1715de1a37b5 perf tools: Add AUX area tracing Snapshot Mode
    > 41a38c374351 perf tools: Add support for PERF_RECORD_ITRACE_START
    > c11e07a556d0 perf tools: Add support for PERF_RECORD_AUX
    > 61c90246aeeb perf auxtrace: Add option to synthesize events for transactions
    > 8214d444516a perf tools: Add build option NO_AUXTRACE to exclude AUX area tracing
    > cd10b2895205 perf tools: Hit all build ids when AUX area tracing
    > 99fa29845349 perf tools: Add AUX area tracing index
    > 64a7e61f11a2 perf report: Fix placement of itrace option in documentation
    > 520a2ebc2f0b perf report: Add Instruction Tracing support
    > 6d5cdd64f314 perf script: Always allow fields 'addr' and 'cpu' for auxtrace
    > b72e74d1f140 perf evlist: Amend mmap ref counting for the AUX area mmap
    > 70d73de4cd57 perf tools: Add aux_watermark member of struct perf_event_attr
    > 400ea6d327ff perf script: Add field option 'flags' to print sample flags
    > 0f0aa5e0693c perf inject: Add Instruction Tracing support
    > cd17a9b54463 perf inject: Re-pipe AUX area tracing events
    > 7a680eb990b6 perf script: Add Instruction Tracing support
    > cfe9174fcfe2 perf tools: Add member to struct dso for an instruction cache
    > c3278f0231e8 perf auxtrace: Add a hashtable for caching
    > 73f75fb1bdc5 perf auxtrace: Add processing for AUX area tracing events
    > [acme@ssdandy linux]$
    >
    > Will try processing these BTS first, i.e. do the reorder here,

    Not that easy...

    - Arnaldo


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