如何在Linux上显示当前磁盘IO队列长度?

I am working on a new IO scheduler for the Linux Kernel. I am trying to see if anyone knows of a tool that prints out total number of outstanding IO requests (Disk IO queue) in Linux?

我正在为Linux内核开发一个新的IO调度器。我想知道是否有人知道在Linux中打印未完成IO请求(磁盘IO队列)的工具?

I would be working from a terminal.

我会在终点站工作。

Thank you!

谢谢你！

2 个解决方案

#1

Forgive the massive necro here. You actually want iostat -x which will display the extended stats for the device in question since last iostat was run. If you wish to monitor the queue in realtime you want iostat -xt 1 (or iostat -xmt 1 to show details in megabytes).

原谅这里的死灵。实际上，您需要iostat -x，它将显示自上次iostat运行以来所使用的设备的扩展属性。如果希望实时监视队列，则需要iostat -xt 1(或iostat -xmt 1以兆字节显示详细信息)。

You can see the average queue size in the avgqu-sz column.

您可以在avgquq -sz列中看到平均队列大小。

Consider the following example output from iostat -xmt 1 which shows a full IO queue (max queue length is 128 for this device) and a saturated disk during a benchmark.

考虑下面来自iostat -xmt 1的输出示例，它显示了一个完整的IO队列(此设备的最大队列长度为128)和一个基准测试期间的饱和磁盘。

18/05/15 00:41:05
avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.00    0.00    0.00    6.02    0.00   93.98

Device:         rrqm/s   wrqm/s     r/s     w/s    rMB/s    wMB/s avgrq-sz avgqu-sz   await  svctm  %util
xvda              0.00     0.00    1.00 1308.00     0.00   163.50   255.81   133.30  101.15   0.76 100.00

#2

dmitry@pro:~$ iostat 
          disk0       cpu     load average
    KB/t tps  MB/s  us sy id   1m   5m   15m
   50.70  34  1.70   4  3 93  1.83 1.65 1.70
dmitry@pro:~$

DESCRIPTION Iostat displays kernel I/O statistics on terminal, device and cpu opera- tions. The first statistics that are printed are averaged over the sys- tem uptime. To get information about the current activity, a suitable wait time should be specified, so that the subsequent sets of printed statistics will be averaged over that time.

描述Iostat在终端、设备和cpu opera上显示内核I/O统计信息。打印出来的第一个统计数据是在系统运行时求平均值。为了获得关于当前活动的信息，应该指定一个合适的等待时间，以便在此期间对后续打印的统计数据集进行平均。

#1