Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How can I get a processor's CPU Percentage?
Top Forums Programming How can I get a processor's CPU Percentage? Post 302245051 by Kosala on Thursday 9th of October 2008 08:28:44 AM
Old 10-09-2008
I believe this is similar to what you read in /proc/stat on Linux. In Linux, you can read the timer ticks spent on user, system and IO, IRQ etc using /proc/stat. But you need to calculate the CPU % by adding the total time spent against each category. Generally following is a common approach. If you look at source of procps (vmstat.c) you might be able to get an idea how it's done on Linux.

All CPU = User + System + Idle time

User CPU % = User / All CPU * 100%

System CPU % = System / All CPU * 100%

But you have to check where you can place pr_cutime and pr_cstime. It looks like it's part of User time.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Clearify what it means under 'WHAT' when hit the 'w'-command

I wonder how I shall read the result below, especially 'what' shown below. The result was shown when I entered 'w'. E.g what is TOP? What is gosh ( what does selmgr mean?)? login@ idle JCPU PCPU what 6:15am 7:04 39 39 TOP 6:34am 6:45 45 45 TOP 6:41am ... (1 Reply)
Discussion started by: Aelgen
1 Replies

2. UNIX for Dummies Questions & Answers

CPU's

I have a question. Is Linux (Redhat 7.2 specifically) set up to run better/faster on a Pentium cpu vs. an AMD? The reason I ask is, I have a PIII 733 w/512 pc133, and a 4mb video card at work, and an AMD 1.4 w/1gb ddr, and a Radeon 64mb DDR at home, and the PIII at work runs a lot faster. I have a... (1 Reply)
Discussion started by: jeremiebarber
1 Replies

3. HP-UX

How to determine cpu&memory percentage usage per user

Using HP-UX v11 Need to monitor cpu and memory usage, total for system and separately for each user in command-line mode. Found out next ways to monitor total cpu usage under hp-ux: 1) vmstat, also shows free memory 2) sar -M ps -eo user,pcpu - does not work, means 'user-defined format'... (4 Replies)
Discussion started by: hp-ux-user
4 Replies

4. AIX

CPU Processor ID

Hallo, does anybody knows a trick to change the Processor ID in AIX 4.3.3. Thanks a lot (9 Replies)
Discussion started by: UXNI
9 Replies

5. Shell Programming and Scripting

get percentage cpu from pid

Hi all, I need a script that will check the cpu usage of a certain process and then kill the process if the % cpu is greater than 25%. I know i can get the pid of a process by doing pidof <processname>. Once I have the pid number is there a command in bash to return the current % cpu? (2 Replies)
Discussion started by: borderblaster
2 Replies

6. Shell Programming and Scripting

Help with bash script - Need to get CPU usage as a percentage

I'm writing a bash script to log some selections from a sensors output (core temp, mb temp, etc.) and I would also like to have the current cpu usage as a percentage. I have no idea how to go about getting it in a form that a bash script can use. For example, I would simply look in the output of... (3 Replies)
Discussion started by: graysky
3 Replies

7. Shell Programming and Scripting

Finding total Percentage CPU usage

Hi, How can I find total CPU usage in percentage? e.g. if my system has 8 CPUs and I want to list total usage for all of them, is it possible through a command? I have tried some of the commands like top, mpstat, sar. The output of those commands has to be manipulated to derive the percentage... (14 Replies)
Discussion started by: jal_capri
14 Replies

8. Hardware

Nodes/Processor/CPU's/threads/packages

Hello, can anyone explain me this jargon "Nodes/Processor/CPU's/threads/packages":confused: and what's the relation between these, I need to work on a cluster and I can not figure out the terminology. Thanks! any good link to read about these would also be very helpful Thanks! ... (1 Reply)
Discussion started by: nonothing
1 Replies

9. Solaris

CPU/processor/cores in M4000

Hi Gurus Can someone help me in explaining the below outputs . psrinfo -p 4 /usr/sbin/psrinfo -pv The physical processor has 4 virtual processors (0-3) SPARC64-VI (portid 1024 impl 0x6 ver 0x93 clock 2150 MHz) The physical processor has 4 virtual processors (8-11) SPARC64-VI... (3 Replies)
Discussion started by: ningy
3 Replies

10. Solaris

Capture PRSTAT based on CPU usage percentage

Hi, Recently i have write a simple script to capture CPU high usage based on prstat but i found out that it did capture correctly. I need to capture the rows that contains CPU usage more than 3%. Below line which i thought will capture CPU usage based CPU column in prstat(9th parameter) which is... (3 Replies)
Discussion started by: tharmendran
3 Replies

LEARN ABOUT OSF1

pset_assign_pid

pset_assign_pid(1)					      General Commands Manual						pset_assign_pid(1)

NAME

       pset_assign_pid - Assigns a process ID to a processor set

SYNOPSIS

       /usr/sbin/pset_assign_pid [-x] pset_id pid [pid...]

OPTIONS

       Assigns exclusive use of the target processor set to each specified process identification number.

DESCRIPTION

       The  pset_assign_pid  command  assigns  one or more process identification numbers to an existing processor set.  The pset_id variable is a
       unique integer that identifies the processor set and is returned by the pset_create command. The pid variable is the process identification
       number, which is a unique integer that identifies the process. Each process identification number that is assigned is removed from its cur-
       rent processor set.

       Use the -x option to assign exclusive use of the processor set.	If the processor set is already in use, a message is  displayed,  and  the
       command	terminates  without  performing the assignment.  If the exclusive assignment succeeds, new requests by other processes for assign-
       ments to the specified processor set (pset_id) are denied.

SEE ALSO

       Commands:  pset_destroy(1), pset_create(1), pset_assign_cpu(1), pset_info(1)

       Files:  processor_sets(4)

																pset_assign_pid(1)
All times are GMT -4. The time now is 10:26 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy