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Unconditionally fall back to software if opening hardware counters fails

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If hardware counters are not available, fall back to SW regardless of
why the hardware counters aren't available. The error code can be
either ENOTSUPP or ENODEV depending on CPU type, so it's simpler to
just retry in all cases, and only fail if the software fallback
failed.
This commit is contained in:
Søren Sandmann Pedersen
2010-02-01 14:02:41 -05:00
parent 16f11912e2
commit 3e4921b92d
1 changed files with 5 additions and 8 deletions
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13
collector.c
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@ -360,14 +360,11 @@ counter_new (Collector *collector,
if ((fd = sysprof_perf_counter_open (&attr, -1, cpu, -1, 0)) < 0)
{
if (errno == ENODEV)
{
attr.type = PERF_TYPE_SOFTWARE;
attr.config = PERF_COUNT_SW_CPU_CLOCK;
attr.sample_period = 1000000;
fd = sysprof_perf_counter_open (&attr, -1, cpu, -1, 0);
}
attr.type = PERF_TYPE_SOFTWARE;
attr.config = PERF_COUNT_SW_CPU_CLOCK;
attr.sample_period = 1000000;
fd = sysprof_perf_counter_open (&attr, -1, cpu, -1, 0);
}
if (fd < 0)