On Thu, Nov 29, 2018 at 11:39:34PM +0800, Jin Yao wrote:
> 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
Reviewed-by: Jiri Olsa <jo...@kernel.org>
thanks,
jirka
