# CPU * vmstat 1 * mpstat #查看所有CPU 信息 * top * pidstat #每个进程CPU使用量 * sar -u 2 2 * perf #可以跟着到进程内部具体函数耗时情况，并且可以指定内核函数进行统计 * sudo yum install perf gawk (on centos install perf if no) ### perf-tools ``` cd git clone --depth 1 https://github.com/brendangregg/perf-tools cd perf-tools ``` ``` [root@sf-vm-1 perf-tools]# sudo ./iolatency Tracing block I/O. Output every 1 seconds. Ctrl-C to end. >=(ms) .. <(ms) : I/O |Distribution | 0 -> 1 : 0 | | >=(ms) .. <(ms) : I/O |Distribution | 0 -> 1 : 0 | | >=(ms) .. <(ms) : I/O |Distribution | 0 -> 1 : 0 | | >=(ms) .. <(ms) : I/O |Distribution | 0 -> 1 : 0 | | >=(ms) .. <(ms) : I/O |Distribution | 0 -> 1 : 3 |######################################| ``` ``` [root@sf-vm-1 perf-tools]# sudo ./fs/cachestat Counting cache functions... Output every 1 seconds. HITS MISSES DIRTIES RATIO BUFFERS_MB CACHE_MB 451 0 0 100.0% 2 3703 452 0 0 100.0% 2 3703 452 0 0 100.0% 2 3703 451 0 0 100.0% 2 3703 451 0 0 100.0% 2 3703 451 0 0 100.0% 2 3703 452 0 0 100.0% 2 3703 450 0 0 100.0% 2 3703 451 0 0 100.0% 2 3703 451 0 0 100.0% 2 3703 ^C 443 0 0 100.0% 2 3703 Ending tracing... ```