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usr/share/systemtap/examples/lwtools/_[ Not.Writable ]

File://usr/share/systemtap/examples/lwtools/fslatency-nd.meta

title: Measure the distribution of file system synchronous read and write latency (non-debuginfo)
name: fslatency-nd.stp
author: Brendan Gregg
keywords: io filesystem
description: This dynamically traces two common file system functions: do_sync_read() and do_sync_write(), and reports a histogram distribution of latency. Many, but not all, file systems and workloads use these functions. Tracing their time provides one view of suffered file system latency.
scope: system-wide
usage: ./fslatency-nd.stp [interval [count]]
arg_1: Output interval (seconds)
arg_2: Output count
test_support: stap -p4 fslatency-nd.stp
test_check: stap -p4 fslatency-nd.stp
test_installcheck: stap fslatency-nd.stp 1 1

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