Linux壓力測試工具stress的參數詳解

爲了測試服務器的負載狀況，可使用stress這個壓力測試工具，能夠在環境上驗證測試下。

stress安裝

sudo yum install -y epel-release
sudo yum install -y stress

參數說明

[root@iZ2ze7aznw5uolxelrna1gZ ~]# stress --help
`stress' imposes certain types of compute stress on your system

Usage: stress [OPTION [ARG]] ...
 -?, --help         show this help statement
                    // 顯示軟件版本信息
     --version      show version statement
 -v, --verbose      be verbose
 -q, --quiet        be quiet
 -n, --dry-run      show what would have been done
                    // 指定運行多少秒
 -t, --timeout N    timeout after N seconds
                    // 等待xx微秒後纔開始運行
     --backoff N    wait factor of N microseconds before work starts
                    // 產生多個處理sqrt()函數的CPU進程
 -c, --cpu N        spawn N workers spinning on sqrt()
                    // 產生多個處理sync()函數的磁盤I/O進程
 -i, --io N         spawn N workers spinning on sync()
 -m, --vm N         spawn N workers spinning on malloc()/free()
     --vm-bytes B   malloc B bytes per vm worker (default is 256MB)
     --vm-stride B  touch a byte every B bytes (default is 4096)
     --vm-hang N    sleep N secs before free (default none, 0 is inf)
     --vm-keep      redirty memory instead of freeing and reallocating
 -d, --hdd N        spawn N workers spinning on write()/unlink()
     --hdd-bytes B  write B bytes per hdd worker (default is 1GB)

Example: stress --cpu 8 --io 4 --vm 2 --vm-bytes 128M --timeout 10s

Note: Numbers may be suffixed with s,m,h,d,y (time) or B,K,M,G (size).

測試場景舉例

1.測試CPU負荷

$stress –c 4

增長4個cpu進程，處理sqrt()函數函數，以提升系統CPU負荷

2.內存測試

$stress –i 4 –vm 10 –vm-bytes 1G –vm-hang 100 –timeout 100s

新增4個io進程，10個內存分配進程，每次分配大小1G，分配後不釋放，測試100S