EVOLUTION-MANAGER

Edit File: 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