Server : Apache System : Linux server2.corals.io 4.18.0-348.2.1.el8_5.x86_64 #1 SMP Mon Nov 15 09:17:08 EST 2021 x86_64 User : corals ( 1002) PHP Version : 7.4.33 Disable Function : exec,passthru,shell_exec,system Directory :  /opt/rh/gcc-toolset-11/root/usr/share/systemtap/examples/lwtools/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

title: Trace slow file system synchronous reads and writes (non-debuginfo)
name: fsslower-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 shows details of each call that is slower than a threshold. 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: ./fsslower-nd.stp [min_ms]
arg_1: Minimum millisecond threshold
test_check: stap -p4 fsslower-nd.stp
test_installcheck: stap fsslower-nd.stp -T 1