Linux command – Stressful Application Test (Disk)

前面有使用過 Stressful Application Test (Stressapptest) https://benjr.tw/96740 這邊針對他的硬碟測試來做說明.

測試環境為 Ubuntu16.04 64bits

File Copy

執行 2 個檔案的 IO threads, 自動檢測 memory 大小與 core 數量以選擇分配的記憶體和記憶體複製線程 (threads).

root@ubuntu:~# stressapptest -f /tmp/file1 -f /tmp/file2
Log: Commandline - stressapptest -f /tmp/file1 -f /tmp/file2
Stats: SAT revision 1.0.6_autoconf, 64 bit binary
Log: buildd @ kapok on Wed Jan 21 17:09:35 UTC 2015 from open source release
Log: 1 nodes, 1 cpus.
Log: Defaulting to 1 copy threads
Log: Total 974 MB. Free 420 MB. Hugepages 0 MB. Targeting 828 MB (84%)
Log: Prefer plain malloc memory allocation.
Log: Using memaligned allocation at 0x7f6c11754000.
Stats: Starting SAT, 828M, 20 seconds
Log: Region mask: 0x1
Log: Seconds remaining: 10
Stats: Found 0 hardware incidents
Stats: Completed: 5580.00M in 20.12s 277.32MB/s, with 0 hardware incidents, 0 errors
Stats: Memory Copy: 1964.00M at 98.03MB/s
Stats: File Copy: 3616.00M at 179.91MB/s
Stats: Net Copy: 0.00M at 0.00MB/s
Stats: Data Check: 0.00M at 0.00MB/s
Stats: Invert Data: 0.00M at 0.00MB/s
Stats: Disk: 0.00M at 0.00MB/s

Status: PASS - please verify no corrected errors

使用參數:

• -f filename : add a disk thread with tempfile ‘filename’

這一次的測試結果可以看到除了 Memory 外 File Copy 也是有流量了.

Stats: Completed: 5580.00M in 20.12s 277.32MB/s, with 0 hardware incidents, 0 errors
Stats: Memory Copy: 1964.00M at 98.03MB/s
Stats: File Copy: 3616.00M at 179.91MB/s

Disk

使用參數:

• -d device : Add a direct write disk thread with block device (or file) ‘device’.

root@ubuntu:~# stressapptest -s 60 -M 500 -d /dev/sdb
Log: Commandline - stressapptest -s 60 -M 500 -d /dev/sdb
Stats: SAT revision 1.0.6_autoconf, 64 bit binary
Log: buildd @ kapok on Wed Jan 21 17:09:35 UTC 2015 from open source release
Log: 1 nodes, 1 cpus.
Log: Defaulting to 1 copy threads
Log: Prefer plain malloc memory allocation.
Log: Using memaligned allocation at 0x7f574afeb000.
Stats: Starting SAT, 500M, 60 seconds
Log: Region mask: 0x1
Log: Seconds remaining: 50
Log: Seconds remaining: 40
Log: Seconds remaining: 30
Log: Seconds remaining: 20
Log: Seconds remaining: 10
Stats: Found 0 hardware incidents
Stats: Completed: 321155.00M in 60.03s 5350.13MB/s, with 0 hardware incidents, 0 errors
Stats: Memory Copy: 321086.00M at 5351.13MB/s
Stats: File Copy: 0.00M at 0.00MB/s
Stats: Net Copy: 0.00M at 0.00MB/s
Stats: Data Check: 0.00M at 0.00MB/s
Stats: Invert Data: 0.00M at 0.00MB/s
Stats: Disk: 69.00M at 1.15MB/s

Status: PASS - please verify no corrected errors

其他與硬碟相關的參數:

• –random-threads number : Number of random threads for each disk write thread.
• –blocks-per-segment number : Number of blocks to read/write per segment per iteration.
• –cache-size size : Size of disk cache.
• –destructive : Write/wipe disk partition.
• –read-block-size size : Size of block for reading.
• –read-threshold time : Maximum time (in us) a block read should take.
• –segment-size size : Size of segments to split disk into.
• –write-block-size size : Size of block for writing. If not defined, the size of block for writing will be defined as the size of block for reading.
• –write-threshold time : Maximum time (in us) a block write should take.

File 與 Disk 都是透過硬碟來跟記憶體做存取,不同的是 Disk 是直接使用 RAW Disk 做存取, File 需要在格式化的硬碟空間才能使用.