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CPU Recognition

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CowBoy
Regular Advisor

CPU Recognition

Hi
Dear All
I have an ml570 with 4 dual core CPU and i installed a sles 10 but the problem is that the OS is using juast one cpu.
in /proc/cpuinfo there is 16 CPUs. but The OS is not working with them???????
11 REPLIES
Ivan Ferreira
Honored Contributor

Re: CPU Recognition

If you see the 16 CPU on /proc/cpuinfo, the system should be able to use all of them.

¿How did you determine that the OS is using just one of them?
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
CowBoy
Regular Advisor

Re: CPU Recognition

I use the top command and 90% of just one cpu is using!!!!!
issueing the command has delay also
Ivan Ferreira
Honored Contributor
Solution

Re: CPU Recognition

You could run the "mpstat -P ALL 5" command and ensure to run multiple processes to identify the load on each processor.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
CowBoy
Regular Advisor

Re: CPU Recognition

Thanks Ivan
I saw all the 16 CPUs but another problem is that Oracle 10g r2 which is installed on the server just using 4 or 5 CPUs . and othe CPUs are idle??????
PSS SYS ADMIN
Super Advisor

Re: CPU Recognition

Could be no ather process need ather processes?????
PSS SYS ADMIN
Super Advisor

Re: CPU Recognition

Could be no other process need other processor?????
Ivan Ferreira
Honored Contributor

Re: CPU Recognition

Maybe, if you want to stress your system you need a benchmark tool, like hammerora, Swingbench or similar.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Steven E. Protter
Exalted Contributor

Re: CPU Recognition

Shalom,

I see no valid reason for your original conclusion. The OS is going to use all CPU's available.

A quick look at top should show 16 cpus in this example.

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Steven E Protter
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CowBoy
Regular Advisor

Re: CPU Recognition

Hi Shalom
The Problem is A quick look at top does not show 16 cpus in this example?????
Vitaly Karasik_1
Honored Contributor

Re: CPU Recognition

Press "1" into "top" - you'll see all your CPUs:

1,I Toggle SMP view: '1' single/separate states; 'I' Irix/Solaris mode
CowBoy
Regular Advisor

Re: CPU Recognition

Thank you everyone
Hi I saw the CPUs after pressing 1 but i think it depends on OS (SLES 10)!!!!to use the CPUs...