linux-kernel - Re: Make perf script easier to use for itrace

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Date:   Thu, 30 Aug 2018 10:42:36 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, adrian.hunter@...el.com,
        linux-kernel@...r.kernel.org
Subject: Re: Make perf script easier to use for itrace

On Wed, Aug 29, 2018 at 10:18:24AM -0700, Andi Kleen wrote:

SNIP

> 
> Filter by a ftrace style graph function:
> 
>  % perf script --graph-function group_sched_in --call-trace
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])          group_sched_in
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])              __x86_indirect_thunk_rax
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])              event_sched_in.isra.107
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                  perf_event_set_state.part.71
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                      perf_event_update_time
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                  perf_pmu_disable
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                  perf_log_itrace_start
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                  __x86_indirect_thunk_rax
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                      perf_event_update_userpage
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                          calc_timer_values
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                              sched_clock_cpu
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                          __x86_indirect_thunk_rax
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                          arch_perf_update_userpage
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                              __fentry__
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                              using_native_sched_clock
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                              sched_clock_stable
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])                  perf_pmu_enable
>                 perf   900 [000] 194167.205652203: ([kernel.kallsyms])              __x86_indirect_thunk_rax
> 
> 
> Also available in
> git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git pt/easy-script-2

got compile error over your branch, might be one of the new fancy gcc8 checksm not sure
  gcc version 8.1.1 20180712 (Red Hat 8.1.1-5) (GCC) 

jirka


---
[jolsa@...va perf]$ make JOBS=1
  BUILD:   Doing 'make -j1' parallel build
  CC       builtin-script.o
builtin-script.c: In function ‘parse_output_fields’:
builtin-script.c:2571:22: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
     output[j].fields &= ~all_output_options[i].field;
                      ^~
builtin-script.c:2571:22: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
     output[j].fields &= ~all_output_options[i].field;
     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
builtin-script.c:2574:10: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
    output[j].user_set = true;
    ~~~~~~^~~
builtin-script.c:2575:10: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
    output[j].wildcard_set = true;
    ~~~~~~^~~
builtin-script.c: In function ‘parse_output_fields.constprop’:
builtin-script.c:2571:22: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
     output[j].fields &= ~all_output_options[i].field;
                      ^~
builtin-script.c:2571:22: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
     output[j].fields &= ~all_output_options[i].field;
     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
builtin-script.c:2574:10: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
    output[j].user_set = true;
    ~~~~~~^~~
builtin-script.c:2575:10: error: array subscript 7 is above array bounds of ‘struct <anonymous>[7]’ [-Werror=array-bounds]
    output[j].wildcard_set = true;
    ~~~~~~^~~
cc1: all warnings being treated as errors
mv: cannot stat './.builtin-script.o.tmp': No such file or directory
make[3]: *** [/home/jolsa/kernel/linux-perf/tools/build/Makefile.build:97: builtin-script.o] Error 1
make[2]: *** [Makefile.perf:507: perf-in.o] Error 2
make[1]: *** [Makefile.perf:206: sub-make] Error 2
make: *** [Makefile:70: all] Error 2