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docs: event counter updates after readahead sanity improvements

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Signed-off-by: Zygo Blaxell <bees@furryterror.org>
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Zygo Blaxell 2024-11-26 22:23:55 -05:00
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docs/event-counters.md
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@ -264,7 +264,9 @@ readahead
The `readahead` event group consists of events related to calls to `posix_fadvise`. The `readahead` event group consists of events related to calls to `posix_fadvise`.
* `readahead_ms`: Total time spent running `posix_fadvise(..., POSIX_FADV_WILLNEED)` aka `readahead()`. * `readahead_clear`: Number of times the duplicate read cache was cleared.
* `readahead_skip`: Number of times a duplicate read was identified in the cache and skipped.
* `readahead_ms`: Total time spent emulating readahead in user-space (kernel readahead is not measured).
* `readahead_unread_ms`: Total time spent running `posix_fadvise(..., POSIX_FADV_DONTNEED)`. * `readahead_unread_ms`: Total time spent running `posix_fadvise(..., POSIX_FADV_DONTNEED)`.
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