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perf test: Parse events workaround for dash/minus
Skip an event configuration for event names with a dash/minus in them. Events with a dash/minus in their name cause parsing issues as legacy encoding of events would use a dash/minus as a separator. The parser separates events with dashes into prefixes and suffixes and then recombines them. Unfortunately if an event has part of its name that matches a legacy token then the recombining fails. This is seen for branch-brs where branch is a legacy token. branch-brs was introduced to sysfs in: https://lore.kernel.org/all/[email protected]/ The failure is shown below as well as the workaround to use a config where the dash/minus isn't treated specially: ``` $ perf stat -e branch-brs true event syntax error: 'branch-brs' \___ parser error $ perf stat -e cpu/branch-brs/ true Performance counter stats for 'true': 46,179 cpu/branch-brs/ ``` Signed-off-by: Ian Rogers <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: John Garry <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ravi Bangoria <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lore.kernel.org/lkml/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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