Linux stress command---stress test
Linux stress command---stress test
1. Usage scenarios
CPU stress test
Memory stress test
Disk IO test
Swap usability testing
2. Syntax and common parameters
stress [options] [number of processes]
-?, --help: Display help information
--version: display version information
-v, --verbose: verbose output
-q, --quiet: silent output
-t, --timeout: Exit after N seconds
--backoff: wait N microseconds to start work signing
-c, --cpu N: simulate the number of CPU usage
-i, --io N: simulate I/O and write the data in the memory buffer to disk immediately
-m, --vm N: Simulate N processes frequently calling/releasing memory
--vm-bytes B: Specify the size of memory allocated in each process (used with -m)
--vm-keep: Keep occupying memory instead of calling/releasing in a loop (used with -m)
-d, --hdd N: simulate disk writing (create files, write content, delete files)
--hdd-bytes N: Specify the write file size, the default is 1GB (used with -d)
3. Commonly used commands
-
CPU stress test
stress –c 4 # Start 4 CPU processes
-
Memory stress test & Swap usability test
stress --vm 3 --vm-bytes 1G --vm-hang 100 --timeout 100s #Start 5 processes, allocate 3G memory, do not release it after allocation, last 100s
-
Disk I/O test
stress –d 3 --hdd-bytes 3G # Start 3 writing processes and write 3G file blocks each time
