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pdh: convert all raw time counter types to seconds (#2776)

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Co-authored-by: Claude <noreply@anthropic.com>
Signed-off-by: Claude <noreply@anthropic.com>
This commit is contained in:
Jan-Otto Kröpke
2026-10-16 22:54:44 +02:00
committed by GitHub
co-authored by Claude
parent a9d5bbef48
commit da7bebc6b3
23 changed files with 313 additions and 246 deletions
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docs/collector.performancecounter.md
+18 -10
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@@ -218,16 +218,24 @@ keep counting up. If the multiplier is the reciprocal of an integer, like `0.001
the value is divided by that integer instead, which avoids rounding artifacts
such as `0.009000000000000001`. If not specified, the value is exported as is.
With the object `type` `raw`, the default, some counters are already converted
to seconds, so do not scale them again: `PERF_100NSEC_TIMER` and
`PERF_PRECISION_100NS_TIMER` counters such as `% Idle Time` are exported in
seconds, and `PERF_ELAPSED_TIME` counters such as `Process\Elapsed Time` as
seconds since the start. `PERF_100NSEC_TIMER_INV` counters such as
`% Processor Time` are not converted and arrive in 100 ns ticks of inactive time
(for `% Processor Time`, the idle time); a multiplier of `1e-7` converts them to
seconds. `PERF_AVERAGE_TIMER` counters such as `Avg. Disk sec/Read` count ticks
of the performance timer, whose frequency depends on the host, so a fixed
multiplier does not fit them; use the `formatted` type for them.
With the object `type` `raw`, the default, time counters are already converted
to seconds, so do not scale them again:
- the 100 ns timers (`PERF_100NSEC_TIMER`, `PERF_100NSEC_TIMER_INV`,
`PERF_100NSEC_MULTI_TIMER`, `PERF_100NSEC_MULTI_TIMER_INV` and
`PERF_PRECISION_100NS_TIMER`), such as `% Idle Time`;
- `PERF_COUNTER_100NS_QUEUELEN_TYPE` counters, such as `Avg. Data Queue Length`
of `SMB Client Shares`, as queue length times seconds, so their rate is the
average queue length;
- `PERF_AVERAGE_TIMER` counters, such as `Avg. Disk sec/Read`, as the summed
duration in seconds, using the time base of the counter. Their second value
is the number of operations;
- `PERF_ELAPSED_TIME` counters, such as `Process\Elapsed Time`, as seconds since
the start.
The raw value of an `_INV` counter is the inactive time: for `% Processor Time`,
that is the idle time, not the busy time. `MULTI_TIMER` values are summed over
all units of the counter, so they can grow faster than wall time.
This key is optional.