[PATCH V8 0/7] Freq/CPU%/CORE_BUSY% support

[kan.liang@intel.com]

From: Kan Liang <kan.liang@intel.com>

This patch set supports per-sample freq/CPU%/CORE_BUSY% print in perf
report -D and --stdio.
For printing these information, the perf.data file must have been obtained
by group read and using special events cycles, ref-cycles, msr/tsc/,
msr/aperf/ or msr/mperf/.

 - Freq (MHz): The frequency during the sample interval. Needs cycles
   ref-cycles event.
 - CPU%: CPU utilization during the sample interval. Needs ref-cycles and
   msr/tsc/ events.
 - CORE_BUSY%: actual percent performance (APERF/MPERF%) during the
   sample interval. Needs msr/aperf/ and msr/mperf/ events.

Here is an example:

$ perf record --freq-perf ~/tchain_edit

$ perf report --stdio --group --show-freq-perf

                                 Overhead   FREQ MHz   CPU%  CORE_BUSY%
Command      Shared Object     Symbol
 ........................................  .........  .....  ..........
...........  ................  ......................

    99.54%  99.54%  99.53%  99.53%  99.53%       2301     96         99
tchain_edit  tchain_edit       [.] f3
     0.20%   0.20%   0.20%   0.20%   0.20%       2301     98         99
tchain_edit  tchain_edit       [.] f2
     0.05%   0.05%   0.05%   0.05%   0.05%       2300     98         99
tchain_edit  [kernel.vmlinux]  [k] read_tsc

Changes since V1:
 - Save cpu max freq to header when recording
 - Read cpu max freq and msr type from header when reporting

Changes since V2:
 - Introduce generic FEAT for CPU related data stored
 - Make cpu max freq and msr type part of perf_session_env
 - rename cpu_u to cpu_util
 - Don't save sample value in perf_sample and discards new iterator.
   Calculating the freq_perf_info in add_entry_cb callback
 - Introduce symbol_conf.freq_perf_type for related hpp column visibility

Changes since V3:
 - add a identifier 'tag' for CPU attributes, max frequency.
 - add backpointers to evlist for env, and evsel for evlist.
 - Use bitmask for freq_perf_type
 - Replace macros by functions to caculate freq, cpu_util and core_busy
 - Move all caculation codes under symbol_conf.show_freq_perf condition.

Changes since V4:
 - Store cpu attributes id as tag and more readable cpu_attr

Changes since V5:
 - Rename freq to max_freq and use it
 - Add a loop in process_cpu_attributes to facility future extension

Changes since V6:
 - Split rename perf_session_env and add backpointer to evlist patches

Changes since V7:
 - Introduce --freq-perf option for perf record
 - Factor out fix for dump_sample

Kan Liang (7):
  perf,tools: introduce generic FEAT for CPU attributes
  perf,tools: read msr pmu type from header.
  perf,record: introduce --freq-perf option
  perf,tools: fix dump_sample crash when evsel is NULL.
  perf,tools: Dump per-sample freq/CPU%/CORE_BUSY% in report -D
  perf,tools: caculate and save freq/CPU%/CORE_BUSY% in he_stat
  perf,tools: Show freq/CPU%/CORE_BUSY% in perf report --stdio

 tools/perf/Documentation/perf-record.txt |  4 ++
 tools/perf/Documentation/perf-report.txt | 12 ++++++
 tools/perf/builtin-record.c              | 39 +++++++++++++++++-
 tools/perf/builtin-report.c              | 56 +++++++++++++++++++++++++
 tools/perf/ui/hist.c                     | 71 +++++++++++++++++++++++++++++---
 tools/perf/util/cpumap.c                 | 32 ++++++++++++++
 tools/perf/util/cpumap.h                 |  1 +
 tools/perf/util/header.c                 | 62 ++++++++++++++++++++++++++++
 tools/perf/util/header.h                 | 13 ++++++
 tools/perf/util/hist.h                   |  3 ++
 tools/perf/util/session.c                | 33 +++++++++++++--
 tools/perf/util/session.h                | 64 ++++++++++++++++++++++++++++
 tools/perf/util/sort.c                   |  3 ++
 tools/perf/util/sort.h                   |  3 ++
 tools/perf/util/symbol.h                 | 12 +++++-
 15 files changed, 397 insertions(+), 11 deletions(-)

-- 
1.8.3.1