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Performance Monitoring Guide

OceanStor Dorado V3 Series V300R002

This document describes performance monitoring of storage systems, including the monitoring method, indicator planning, configuration monitoring, and problem diagnosis.
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Checking the Host CPU

Checking the Host CPU

In certain host running modes, a host automatically reduces the CPU clock frequency during off-peak hours to save energy. However, CPU underclocking affects the interactive performance between a host and a storage system, increasing the I/O latency on the host side. To achieve optimal performance, configure the host running mode to prevent the CPU clock frequency from decreasing.

Windows Hosts

On a Windows host, you can view the CPU clock frequency.

Choose Start > Run. In the Run dialog box, enter DXDIAG and click OK to check whether the CPU clock frequency has been reduced.

You can change the host running mode to the high performance mode. By doing so, the CPU clock frequency will not decrease.

Operation path: Start > Control Panel > System and Security > Power Options > Select a power plan > High performance

NOTE:

After setting View by (the control panel view mode) to Category, you can view System and Security.

Linux Hosts

On a Linux host, run cat /proc/cpuinfo to view the CPU clock frequency.

To ensure that the CPU clock frequency does not decrease, configure the host running mode as follows:

  1. Run cd to enter the /sys/devices/system/cpu/ directory.
  2. Run ll to view the number of CPUs in the /sys/devices/system/cpu directory.
  3. Run echo performance for each CPU in the /sys/devices/system/cpu/ directory.

    linux-ob3a:~ # cd /sys/devices/system/cpu 
    linux-ob3a:/sys/devices/system/cpu # ll 
    total 0 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu0 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu1 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu10 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu11 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu2 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu3 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu4 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu5 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu6 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu7 
    drwxr-xr-x 7 root root    0 May 25 08:35 cpu8 
    drwxr-xr-x 7 root root  0 May 25 08:35 cpu9 
    drwxr-xr-x 3 root root    0 May 28 14:43 cpufreq 
    drwxr-xr-x 2 root root    0 May 28 14:43 cpuidle 
    -r--r--r-- 1 root root 4096 May 25 08:35 kernel_max 
    -r--r--r-- 1 root root 4096 May 28 14:43 offline 
    -r--r--r-- 1 root root 4096 May 25 08:35 online 
    -r--r--r-- 1 root root 4096 May 28 14:43 possible 
    -r--r--r-- 1 root root 4096 May 28 14:43 present 
    --w------- 1 root root 4096 May 28 14:43 probe 
    --w------- 1 root root 4096 May 28 14:43 release 
    -rw-r--r-- 1 root root 4096 May 28 14:43 sched_mc_power_savings 
    -rw-r--r-- 1 root root 4096 May 28 14:43 sched_smt_power_savings 
    linux-ob3a:/sys/devices/system/cpu # echo performance > cpu0/cpufreq/scaling_governor

AIX Hosts

You can run lsattr -El proc0 to view CPU frequency.

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Updated: 2019-07-17

Document ID: EDOC1100049152

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