iolatency-perf(8) on Linux
The text 87346c47b4bb, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
summarize block device I/O latency as a histogram. Uses Linux ftrace.
Flags it lists
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-Q -
-T -
-d -
-h -
-i