diff options
| -rw-r--r-- | doc/blkiomon.8 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/blkiomon.8 b/doc/blkiomon.8 index dbed0df..aa5ece2 100644 --- a/doc/blkiomon.8 +++ b/doc/blkiomon.8 @@ -17,6 +17,8 @@ blkiomon is a block device I/O monitor. It periodically generates per-device request size and request latency statistics from blktrace data. It provides histograms as well as data that can be used to calculate min, max, average and variance. For this purpose, it consumes D and C traces read from stdin. +Note, that this doesn't work for logical volumes, as high-level drivers +don't see the completion of the events (C). There are options for binary output and human-readable output to files and stdout. Output to a message queue is supported as well. |