perf test: Rerun failed metrics with longer workload

Rerun failed metrics with longer workload to avoid false failure because
sometimes metric value test fails when running in very short amount of
time. Skip rerun if equal to or more than 20 metrics fail.

Signed-off-by: Weilin Wang <[email protected]>
Tested-by: Namhyung Kim <[email protected]>
Cc: [email protected]
Cc: Ian Rogers <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Caleb Biggers <[email protected]>
Cc: Perry Taylor <[email protected]>
Cc: Samantha Alt <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Ingo Molnar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

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