04-26-2010
other then just to "understand" mpstat, is there any particular reason you need to clearly understand this command? Are you a developer? Has someone come to you regarding multitasking of the OS? I guess looking for a bit more background here.
mutex or mutually exclusive (smtx) = kernel contention (if a thread can't acquire a lock, it spins).
context switch (csw) = "A context switch is the computing process of storing and restoring the state (context) of a CPU so that execution can be resumed from the same point at a later time." - wikipedia.org
I found some interesting articles from Princeton u.
[
http://www.princeton.edu/~unix/Solar...kcontend.html]
[
http://www.princeton.edu/~unix/Solar.../cpuload.html]
You could honestly spend years understanding this stuff
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I gave mpstat command in my system..
the o/p is like below
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl
0 199 3 198 112 5 78 95 124 55 0 9 25 14 7 54
1 186 2 97 92 1 45 94 121 41 0 220 27 14 5 54
... (2 Replies)
Discussion started by: shahnazurs
2 Replies
2. Solaris
Hi,
I am trying to take the Statistics of the machine during load.Can someone explian the parameters of
iostat:
tty sd1 sd2 sd3 sd4 cpu
tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id
vmstat:
kthr ... (1 Reply)
Discussion started by: grrajeish
1 Replies
3. Solaris
All:
I have a V445 server with four IIIi CPUs and 8 GB RAM running Solaris 10 and an Oracle database along with some app server components and we have had some performance issues - so I collected some VMSTAT and MPSTAT data over the course of three days with a 15-minute polling interval.
I... (1 Reply)
Discussion started by: jeffd4d
1 Replies
4. AIX
I have a number of LPARs on one P520. All LPARs are running 5.3 and I observe the following:
On some LPARs the number of CPUs found do not match between topas and mpstat.
Server 1:
$ mpstat
System configuration: lcpu=4 ent=0.2 mode=Uncapped
cpu min maj mpc int cs ics rq ... (1 Reply)
Discussion started by: petervg
1 Replies
5. Linux
mpstat -P ALL 1 10
it results..
08:05:54 PM CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s
08:05:55 PM all 0.00 0.00 0.49 0.00 0.49 0.00 0.00 99.02 1024.75
08:05:55 PM 0 0.00 0.00 0.00 0.00 0.99 0.00 0.00 ... (1 Reply)
Discussion started by: pritesh_patil
1 Replies
6. Shell Programming and Scripting
HI I ma using mpstat and sar commands to check the cpu utilisation
but the results are not matching .I dont understand why thisis happening?
$ sar -u 12 5
Linux 2.6.9-89.35.1.ELhugemem (abcd.efgh.com) 03/07/2013
02:43:16 AM CPU %user %nice %system %iowait %idle... (1 Reply)
Discussion started by: ptappeta
1 Replies
7. Shell Programming and Scripting
HI ,
I am wrirting a script for checking the performance monitoring on Linux System when my application is running.
I have to run a test for 30 minutes on some server and while the test is running i have to capture the perfromance metrics of Linux through vmstat , sar, mpstat, free.
here is the... (3 Replies)
Discussion started by: Anamica
3 Replies
8. UNIX and Linux Applications
hi everyone,
We've generated mpstat.out file monitoring cpu utilization and the file is ready now.Wanted to generate graphical charts for the same output data.
Can anyone pleas suggest tool for the same.? (1 Reply)
Discussion started by: Kathraji
1 Replies
9. Shell Programming and Scripting
I have a script which runs the mpstat and prints the output in a file. In order capture highest cpu ususage from the generated output file,
have to manually tail the output file and need to grab which cpu has highest value (which is very annoying)
Is there a way we can automate that process of... (3 Replies)
Discussion started by: Optimus81
3 Replies
10. Shell Programming and Scripting
I want to get average idle time of the server using mpstat. The problem I am having is %idle is not in same columns in all the versions of linux.
example 1:
example 2:
I tried below command as generalized solution but as Average as one less column output is not proper.
I am... (1 Reply)
Discussion started by: kumarjohn
1 Replies
LEARN ABOUT REDHAT
mpstat
MPSTAT(1) Linux User's Manual MPSTAT(1)
NAME
mpstat - Report processors related statistics.
SYNOPSIS
mpstat [ -P { cpu | ALL } ] [ -V ] [ interval [ count ] ]
DESCRIPTION
The mpstat command writes to standard output activities for each available processor, processor 0 being the first one. Global average
activities among all processors are also reported. The mpstat command can be used both on SMP and UP machines, but in the latter, only
global average activities will be printed.
The interval parameter specifies the amount of time in seconds between each report. A value of 0 indicates that processors statistics are
to be reported for the time since system startup (boot). The count parameter can be specified in conjunction with the interval parameter
if this one is not set to zero. The value of count determines the number of reports generated at interval seconds apart. If the interval
parameter is specified without the count parameter, the mpstat command generates reports continuously.
REPORTS
The report generated by the mpstat command has the following format:
CPU
Processor number. The keyword all indicates that statistics are calculated as averages among all processors.
%user
Show the percentage of CPU utilization that occurred while executing at the user level (application).
%nice
Show the percentage of CPU utilization that occurred while executing at the user level with nice priority.
%system
Show the percentage of CPU utilization that occurred while executing at the system level (kernel).
%idle
Show the percentage of time that the CPU or CPUs were idle.
intr/s
Show the total number of interrupts received per second by the CPU or CPUs.
OPTIONS
-P cpu | ALL
Indicate the processor number for which statistics are to be reported. cpu is the processor number. Note that processor 0 is the
first processor. The ALL keyword indicates that statistics are to be reported for all processors.
-V Print version number and usage then exit.
ENVIRONMENT
The mpstat command takes into account the following environment variable:
S_TIME_FORMAT
If this variable exists and its value is ISO then the current locale will be ignored when printing the date in the report header.
The mpstat command will use the ISO format (YYYY-MM-DD) instead.
EXAMPLES
mpstat 2 5
Display five reports of global statistics among all processors at two second intervals.
mpstat -P ALL 2 5
Display five reports of statistics for all processors at two second intervals.
BUGS
/proc filesystem must be mounted for the mpstat command to work.
Only a few activities are supplied by the Linux kernel for each processor.
FILES
/proc contains various files with system statistics.
AUTHOR
Sebastien Godard <sebastien.godard@wanadoo.fr>
SEE ALSO
sar(1), sadc(8), sa1(8), sa2(8), iostat(1), vmstat(8)
http://perso.wanadoo.fr/sebastien.godard/
Linux MAY 2000 MPSTAT(1)