在 bonnie 基准测试中，延迟结果代表什么？

Question

在尝试使用 bonnie 基准测试对某些 NFS 服务器进行基准测试时，我注意到结果的一行是延迟值。我想知道是否有人可以解释这个延迟值代表什么。谢谢！

邦妮结果示例（强调延迟线）：

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

延迟基本上是告诉硬盘要做什么、等待硬盘将磁头移动到正确位置（如果不是 SSD）等所需的时间。如果将读/写某些内容所需的时间视为数据量的线性函数，则它就是 Y 截距。