【初學fio】fio結果分析

test: (g=0): rw=write, bs=1M-1M/1M-1M/1M-1M, ioengine=libaio, iodepth=16
fio-2.8
Starting 1 process
Jobs: 1 (f=1): [W(1)] [100.0% done] [0KB/68198KB/0KB /s] [0/66/0 iops] [eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=4676: Thu Apr 7 17:22:37 2016
write: io=20075MB, bw=68464KB/s, iops=66, runt=300255msec # 執行多少IO，平均帶寬，線程運行時間
slat (usec): min=51, max=5732, avg=291.11, stdev=262.47 # 提交延遲
clat (usec): min=1, max=2235.8K, avg=239043.28, stdev=153384.41 # 完成延遲
lat (usec): min=367, max=2235.9K, avg=239337.72, stdev=153389.57 # 響應時間
clat percentiles (usec):
| 1.00th=[ 221], 5.00th=[ 442], 10.00th=[ 1004], 20.00th=[108032],
| 30.00th=[228352], 40.00th=[248832], 50.00th=[257024], 60.00th=[268288],
| 70.00th=[280576], 80.00th=[301056], 90.00th=[342016], 95.00th=[477184],
| 99.00th=[806912], 99.50th=[864256], 99.90th=[1122304], 99.95th=[1171456],
| 99.99th=[1646592]
bw (KB /s): min= 170, max=204800, per=100.00%, avg=68755.07, stdev=27034.84
lat (usec) : 2=0.01%, 4=0.13%, 50=0.06%, 100=0.26%, 250=1.04%
lat (usec) : 500=4.53%, 750=2.61%, 1000=1.33%
lat (msec) : 2=1.18%, 4=0.15%, 10=0.77%, 20=0.77%, 50=1.50%
lat (msec) : 100=4.43%, 250=23.48%, 500=53.23%, 750=3.09%, 1000=1.30%
lat (msec) : 2000=0.19%, >=2000=0.01%
cpu : usr=0.03%, sys=2.11%, ctx=19066, majf=0, minf=7
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=103.8%, 32=0.0%, >=64=0.0% # io隊列
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% # 單個IO提交要提交的IO數
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.1%, 32=0.0%, 64=0.0%, >=64=0.0%
issued : total=r=0/w=20060/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0
latency : target=0, window=0, percentile=100.00%, depth=16 # IO完延遲