CPU cores usage

mikes88 · 03-05-2012, 02:44 PM

Hello,

Trying to figure out if there is a way to view all the cores that a process is using in linux and how much of that core it is using. Need to be able to run this command for a day and output the information to a file to be analyzed.

If anyone has any insight or any scripts for this please let me know.

Thanks

Slackyman · 03-06-2012, 07:09 AM

Code:

pidstat -p PID -T ALL

Where PID is the Process ID of the task you want to monitor and the -T ALL option monitor all the children too.
Look at the output:

Code:

14:08:00          PID    %usr %system  %guest    %CPU   CPU  Command
14:08:00         2187    0,06    0,08    0,00    0,15     2  X

14:08:00          PID    usr-ms system-ms  guest-ms  Command
14:08:00         2187     15100     19500         0  X

the CPU value is the CPU core used at that time by that task.
You can use this in scripting launching the command every second (or fraction) and write the output to a file.

mikes88 · 03-06-2012, 10:42 AM

i used the command ps -p PID -L -o pid,psr,pcpu becuase pidstats wasnt on the system. It worked fine and posted the info

Quote:

PID PSR %CPU
3874 2 0.0
3874 1 0.1
3874 - 0.0
3874 2 0.0
3874 2 0.2
3874 4 0.1
3874 5 0.2
3874 6 0.0
3874 7 0.0
3874 2 0.0

Now when i try and run it on another system i get the following output:

Quote:

PID PSR %CPU
874 - 0.0
874 - 0.2
874 - 0.0
874 - 1.5
874 - 0.3

ANyone have any insight on that?

Slackyman · 03-06-2012, 12:21 PM

Quote:

Originally Posted by mikes88

Now when i try and run it on another system i get the following output

Which distro?

mikes88 · 03-06-2012, 01:16 PM

Sun os 5.10

Slackyman · 03-06-2012, 01:25 PM

From what I know SunOS 5 was released in 1993/94 then changed its name to Solaris.
Are you talking about Solaris or the ORIGINAL SunOS?!?
Anyway, I worked on Solaris systems in 1998-2000 and at that time there ain't no multicore CPU (but there were servers with more than one CPU)

I can't figure out why it doesn't show PSR info.

mikes88 · 03-06-2012, 02:16 PM

i see..well.. if you know of any other commands that would help me get what im looking for id really appreciate it.

steveparker · 03-20-2012, 05:44 PM

Check out nmon if on AIX/Linux (http://www.ibm.com/developerworks/ai...u-analyze_aix/) or Sarmon (http://www.geckotechnology.com/fr/sarmon) on Solaris