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Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return"
This reverts commit aa7bc7ef73.
It removed the fallback from hardware profiling to software profiling.
.e.g., in a VM with no PMU.
Reported-by: David Ahern <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: Tom Zanussi <[email protected]>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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2 changed files with 0 additions and 5 deletions
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@ -331,9 +331,6 @@ try_again:
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else if (err == ENODEV && cpu_list) {
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die("No such device - did you specify"
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" an out-of-range profile CPU?\n");
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} else if (err == ENOENT) {
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die("%s event is not supported. ",
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event_name(evsel));
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} else if (err == EINVAL && sample_id_all_avail) {
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/*
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* Old kernel, no attr->sample_id_type_all field
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@ -1247,8 +1247,6 @@ try_again:
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die("Permission error - are you root?\n"
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"\t Consider tweaking"
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" /proc/sys/kernel/perf_event_paranoid.\n");
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if (err == ENOENT)
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die("%s event is not supported. ", event_name(evsel));
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/*
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* If it's cycles then fall back to hrtimer
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* based cpu-clock-tick sw counter, which
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