SMP load balancing

[Timo J]

We have a 4-CPU rp5470 running our application. Attached is the top output of the situation, when one of our processes (in fact, it's from third party) freaked out (fooProcess).

My question is that how is the load balancing between prosessors working in HP-UX SMP? If you take a look at the attached output, seems like CPU 3 is doing much more work than other processors. Due to that, our own application may fail to timeouts on socket handling (Yes, I know that our own application should work better ;| ). Is there anyway to balance the situation? Or in the other hand, is there really any need to balance that situation?

[Thayanidhi]

Hi,

I think you go may for Process Resource
Manager(PRM) or Work Load Manager (WLM)
to allocate resources for processes.

TT

[Sundar_7]

You have something called processor sets with Process Resource Manager. You can use this to restict the application usage to a specific processor.

Workload manager works hand-in-hand with PRM and it is the only Goal based Work load management tool available in the market right now.

PRM is metric based workload management tool.

[Jeff Schussele]

Hi Mikko,

It's not enough to just have multiple CPUs - the application MUST be written multi-threaded to use *more* than one CPU.
I suspect in your case the app is single-threaded & if so, it will *always* live on one & only one CPU when it starts up.

Rgds,
Jeff

[Timo J]

Jeff,

the application is multi-threaded. Looks like we had to purchase that PRM.

[Shaikh Imran]

Hi,
Is this the same situation always when u do top i.e. always does the foo process goes to only one cpu an choke it ?
If yes then your process is a single thread one but as far as SMP in HP is concerned it is always balanced between the resources.
You can also use glance plus for more information and benchmarks.

Regards,