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    Subject[PATCH v4 0/4] perf report/annotate: Support average IPC and IPC coverage for function
    Date
    Add supporting of displaying the average IPC and IPC coverage
    percentage per function.

    For example,

    $ perf record -b ...
    $ perf report -s symbol or
    perf report -s symbol --stdio

    Overhead Symbol IPC [IPC Coverage]
    39.60% [.] __random 2.30 [ 54.8%]
    18.02% [.] main 0.43 [ 54.3%]
    14.21% [.] compute_flag 2.29 [100.0%]
    14.16% [.] rand 0.36 [100.0%]
    7.06% [.] __random_r 2.57 [ 70.5%]
    6.85% [.] rand@plt 0.00 [ 0.0%]
    ...

    $ perf annotate --stdio2

    Percent IPC Cycle (Average IPC: 2.30, IPC Coverage: 54.8%)

    Disassembly of section .text:

    000000000003aac0 <random@@GLIBC_2.2.5>:
    8.32 3.28 sub $0x18,%rsp
    3.28 mov $0x1,%esi
    3.28 xor %eax,%eax
    3.28 cmpl $0x0,argp_program_version_hook@@GLIBC_2.2.5+0x1e0
    11.57 3.28 1 ↓ je 20
    lock cmpxchg %esi,__abort_msg@@GLIBC_PRIVATE+0x8a0
    ↓ jne 29
    ↓ jmp 43
    11.57 1.10 20: cmpxchg %esi,__abort_msg@@GLIBC_PRIVATE+0x8a0
    ...

    v4:
    ---
    Add a new patch "perf report: Documentation average IPC and IPC coverage"
    to explain the new columns "IPC" and "IPC Coverage".

    Other patches are not changed.

    v3:
    ---
    Remove the sortkey "ipc" from command-line. The columns "IPC"
    and "[IPC Coverage]" are automatically enabled when "symbol"
    is specified.

    Patch "perf report: Display average IPC and IPC coverage per symbol"
    is impacted.

    v2:
    ---
    1. Merge in Jiri's patch to support stdio mode

    2. Add a new patch "perf annotate: Create a annotate2 flag
    in struct symbol" which records if the symbol has been
    annotated yet.

    3. Minor update such as adding { } for multiline code in 'if'
    condition.

    Jin Yao (4):
    perf annotate: Compute average IPC and IPC coverage per symbol
    perf annotate: Create a annotate2 flag in struct symbol
    perf report: Display average IPC and IPC coverage per symbol
    perf report: Documentation average IPC and IPC coverage

    tools/perf/Documentation/perf-report.txt | 8 +++++
    tools/perf/builtin-report.c | 26 ++++++++++++--
    tools/perf/util/annotate.c | 42 ++++++++++++++++++++--
    tools/perf/util/annotate.h | 5 +++
    tools/perf/util/hist.h | 1 +
    tools/perf/util/sort.c | 61 ++++++++++++++++++++++++++++++++
    tools/perf/util/sort.h | 2 ++
    tools/perf/util/symbol.h | 1 +
    8 files changed, 140 insertions(+), 6 deletions(-)

    --
    2.7.4

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