perf shell completion: Support completion of metrics/metricgroups

Allow metrics to expand for -M or --metrics options.

Committer testing:

  # grep -m1 'model name' /proc/cpuinfo
  model name	: AMD Ryzen 9 5950X 16-Core Processor
  #

Before:

  Just expansion of files/directories in the pwd are expanded:

  # . tools/perf/perf-completion.sh
  # perf stat -M b
  block/ build/
  # perf stat -M b

After:

  # . tools/perf/perf-completion.sh
  # perf stat -M
  all_l2_cache_accesses  all_remote_links_outbound   data_fabric          l1_itlb_misses                  l2_cache_misses_from_l2_hwpf  macro_ops_dispatched       tlb
  all_l2_cache_hits      branch_misprediction_ratio  decoder              l2_cache                        l3_cache                      nps1_die_to_dram
  all_l2_cache_misses    branch_prediction           ic_fetch_miss_ratio  l2_cache_accesses_from_l2_hwpf  l3_read_miss_latency          op_cache_fetch_miss_ratio
  # perf stat -M branch_
  branch_misprediction_ratio  branch_prediction
  # perf stat -M branch_prediction -a sleep 1

   Performance counter stats for 'system wide':

       115,079,765      ex_ret_brn                       #      4.0 %  branch_misprediction_ratio
         4,561,456      ex_ret_brn_misp

       1.015925106 seconds time elapsed

  #

Suggested-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Ian Rogers <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions