tree 63164895ffe17135e53dec6017da12e86c8a6c70
parent f1031c8d33a8c40d4cac26e58c37d9fba0e31a8a
author Jin Yao <yao.jin@linux.intel.com> 1513848370 +0800
committer Arnaldo Carvalho de Melo <acme@redhat.com> 1514387759 -0300

perf tool: Improve bash command line auto-complete for multiple events with comma

perf has perf-completion.sh to define command line auto-completion in
bash/zsh.

For record/stat -e it works for single events, but isn't working when
specifying multiple events with comma.

It would be very useful if it could be fixed to make it easier by
supporting multiple events, comma separated.

With this patch, the result can be like this:

1. Support the events returned from 'perf list --raw-dump'

root@skl:/tmp# perf stat -e cpu/cache<TAB>
cpu/cache-misses/      cpu/cache-references/

root@skl:/tmp# perf stat -e cpu/cache-misses/,cpu/branch-<TAB>
cpu/branch-instructions/  cpu/branch-misses/

root@skl:/tmp# perf stat -e cpu/cache-misses/,cpu/branch-i<TAB>
root@skl:/tmp# perf stat -e cpu/cache-misses/,cpu/branch-instructions/

2. Support the events listed in /sys/bus/event_source/devices/cpu/events

root@skl:/tmp# perf stat -e cycle<TAB>
cycle_activity.cycles_l1d_miss  cycle_activity.stalls_l3_miss
cycle_activity.cycles_l2_miss   cycle_activity.stalls_mem_any
cycle_activity.cycles_l3_miss   cycle_activity.stalls_total
cycle_activity.cycles_mem_any   cycles-ct
cycle_activity.stalls_l1d_miss  cycles-t
cycle_activity.stalls_l2_miss

root@skl:/tmp# perf stat -e cycles-<TAB>
cycles-ct  cycles-t

root@skl:/tmp# perf stat -e cycles-t,cpu/c<TAB>
cpu/cache-misses/      cpu/cpu-cycles/        cpu/cycles-t/
cpu/cache-references/  cpu/cycles-ct/

root@skl:/tmp# perf stat -e cycles-t,cpu/cache-<TAB>
cpu/cache-misses/      cpu/cache-references/

root@skl:/tmp# perf stat -e cycles-t,cpu/cache-misses/

3. Support the uppercase event which is with prefix "cpu/"

root@skl:/tmp# perf stat -e cpu/c<TAB>
cpu/cache-misses/      cpu/cpu-cycles/        cpu/cycles-t/
cpu/cache-references/  cpu/cycles-ct/

root@skl:/tmp# perf stat -e cpu/cache-misses/,cpu/C<TAB>
cpu/CACHE-MISSES/      cpu/CPU-CYCLES/        cpu/CYCLES-T/
cpu/CACHE-REFERENCES/  cpu/CYCLES-CT/

root@skl:/tmp# perf stat -e cpu/cache-misses/,cpu/CACHE-REFERENCES/

Note that:

a) This patch only supports bash.

b) It doesn't support the cases like {},{} or {...,...}.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1513848370-8098-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>