per-tools is a performance optimization guru brendan gregg there perf and performance optimization tools written in ftrace
provides io, network, system calls. . . Most aspects of performance analysis tools.
A reference to FIG.
installation
- Code clone
git clone --depth 1 https://github.com/brendangregg/perf-tools
- Basic use
View io delay
./iolatency -Q
effect
./iolatency -Q
Tracing block I/O. Output every 1 seconds. Ctrl-C to end.
>=(ms) .. <(ms) : I/O |Distribution |
0 -> 1 : 0 | |
1 -> 2 : 0 | |
2 -> 4 : 0 | |
4 -> 8 : 0 | |
8 -> 16 : 2 |######################################|
>=(ms) .. <(ms) : I/O |Distribution |
0 -> 1 : 0 | |
>=(ms) .. <(ms) : I/O |Distribution |
0 -> 1 : 0 | |
>=(ms) .. <(ms) : I/O |Distribution |
0 -> 1 : 0 | |
^C
说明
perf-tools 使用简单，同时github 上也提供了比较全的demo，可以方便学习