在bonnie基准测试中，延迟结果代表什么？

Question

在使用bonnie基准测试某个NFS服务器的基准时，我注意到一行结果是延迟值。我想知道是否有人能解释这个延迟值代表什么。谢谢！

样品邦尼结果（延迟线强调）：

mshamma@hs1:/mnt/hs18/bonnie$ sudo bonnie -u root -c 100 -s 100000 
Using uid:0, gid:0. 
Writing a byte at a time...done 
Writing intelligently...done 
Rewriting...done 
Reading a byte at a time...done 
Reading intelligently...done 
start 'em...done...done...done...done...done... 
Create files in sequential order...done. 
Stat files in sequential order...done. 
Delete files in sequential order...done. 
Create files in random order...done. 
Stat files in random order...done. 
Delete files in random order...done. 
Version 1.96  ------Sequential Output------ --Sequential Input- --Random- 
Concurrency 100  -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- 
Machine  Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP 
hs1   100000M 980 94 107439 10 57596 8 2426 93 126676 9 165.0 15 
**Latency    11089us 22143ms 40946ms 18167us  204ms  240ms** 
Version 1.96  ------Sequential Create------ --------Random Create-------- 
hs1     -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- 
       files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 
       16 1427 9 48 0 231 0 1244 10 52 0 2715 11 
**Latency    22582us  406ms 6516ms 5665us 46629us 21379us** 
1.96,1.96,hs1,100,1288943643,100000M,,980,94,107439,10,57596,8,2426,93,126676,9,165.0,15,16,,,,,1427,9,48,0,231,0,1244,10,52,0,2715,11,11089us,22143ms,40946ms,18167us,204ms,240ms,22582us,406ms,6516ms,5665us,46629us,21379us 

Answer 1

延迟基本上是告诉你的硬盘做什么，等待硬盘的磁头移到正确的位置所需的时间（如果它不是SSD），等等。如果您花时间读取/写入某些数据量的线性函数，则这是Y轴截距。