How to use the mpstat command in Linux
Editor to share with you how to use the mpstat command in Linux, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!
Linux common commands mpstat command instructions are mainly used in multi-CPU environments, it displays the status of each available CPU, and this information is stored in the / proc/stat file.
Mpstat displays the status of each available CPU
Add that in a multi-CPUs system, it can view not only the average status information of all CPU, but also the information of a specific CPU.
Syntax mpstat (option) (parameter) option-P: specifies the CPU number. Parameter interval: interval for each report (seconds)
Times: the number of times the report is displayed.
Instance when the mpstat takes no parameters, the output is the average since the system was started.
Mpstat Linux 2.6.9-5.31AXsmp (builder.redflag-linux.com) 12 soft 16 mpstat Linux 09:38:46 AM CPU% user% nice% system% iowait% soft% idle intr/s 09:38:48 AM all 23.28 0.00 1.75 0.50 0.00 0.00 74.47 1018.59 Statistics report for 2 processors generated every 2 seconds:
The following command produces statistics reports for 2 processors every 2 seconds, generating information for a total of three interval, and then gives the average information for the three interval. By default, the output is sorted by CPU number. The first line gives all the active data since the system was booted. Next, each line corresponds to the active state of a processor.
Mpstat-P ALL 2 3 Linux 2.6.18-164.el5 (server.sys.com) 01ax 04 sys 09:34:20 PM CPU% user% nice% iowait% irq% soft% steal% idle intr/s 09:34:22 PM all 0.00 0.00 0.00 100.00 09:34:22 PM 00.00 0.00 0.50 0.00 0.00 0.00 99.50 1001.00 09:34:22 PM 1 0.00 0.00 0.00 100.00 0.00 compare the results of mpstat with and without parameters:
Open a 2G file in the background
Cat 1.img & then run the mpstat command on another terminal
Mpstat Linux 2.6.18-164.el5 (server.sys.com) 01 user 04 mpstat Linux 10:17:31 PM CPU% user% nice% sys% iowait% irq% steal% idle intr/s 10:17:31 PM all 0.07 0.02 0.25 0.21 0.01 0.04 0.00 99.40 1004.57 mpstat Linux 2.6.18-164.el5 (server.sys.com ) 10:17:35 PM CPU% user% nice% sys% iowait% soft% steal% idle intr/s 10:17:35 PM all 0.07 0.02 0.25 0.21 0.01 0.04 0.00 99.39 1004.73 mpstat 3 10 Linux 2.6.18-164.el5 (server.sys.com) 01Compact 10:17:55 PM CPU User nice sys iowait irq soft steal idle intr/s 10:17:58 PM all 13.12 0.00 20.93 0.00 1.83 9.80 0.00 54.32 10:18:01 PM all 10.82 0.00 19.30 0.83 1.83 9.32 0.00 57.90 10:18:04 PM All 10.95 0.00 20.40 0.17 1.99 8.62 0.00 57.88 2384.05 10:18:07 PM all 10.47 0.00 18.11 0.00 1.50 8.47 0.00 61.46 2416.00 10:18:10 PM all 11.81 0.00 22.63 0.00 1.83 11.98 0.00 51.75 2210.60 10:18:13 PM all 6.31 0.00 10.80 0.00 1.00 5.32 0.00 76.58 1795.33 10:18:19 PM all 1.75 0.00 3.16 0.75 0.25 1.25 0.00 92.85 1245.18 10:18:22 PM all 11.94 0.00 19.07 0.00 1.99 8.29 0.00 58.71 2630.46 10:18:25 PM all 11.65 0.00 19.30 0.50 2.00 9.15 0.00 57.40 2673.91 10:18:28 PM all 11.44 0.00 21.06 0.33 1.99 10.61 0.00 54.56 2369.87 Average: all 9.27 0.00 16.18 0.30 1.50 7.64 0.00 65.11 2173.54 the above two tables show that the system should be reflected correctly. You need to use the parameters of the command correctly. Vmstat and iostat also need to pay attention to this issue.
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