CPU Recognition

[CowBoy]

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???????

[Ivan Ferreira]

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?

[CowBoy]

I use the top command and 90% of just one cpu is using!!!!!
issueing the command has delay also

[Ivan Ferreira · Accepted solution]

You could run the "mpstat -P ALL 5" command and ensure to run multiple processes to identify the load on each processor.

[CowBoy]

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]

Could be no ather process need ather processes?????

[PSS SYS ADMIN]

Could be no other process need other processor?????

[Ivan Ferreira]

Maybe, if you want to stress your system you need a benchmark tool, like hammerora, Swingbench or similar.

[Steven E. Protter]

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.

SEP

[CowBoy]

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

[Vitaly Karasik_1]

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

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

[CowBoy]

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