topic Re: process binding in Operating System - HP-UX

process binding

Victor Lee — Mon, 26 Nov 2001 20:29:35 GMT

Hi

I am working on an L2000 with 4 cpu's
running HP-UX 11.0. I would
like to run 4 processes on this machine
and have each of the 4 processes bound to a
particular cpu. In other words:

process 1 runs on cpu 1
process 2 runs on cpu 2
process 3 runs on cpu 3
process 4 runs on cpu 4

How is this done?

thanks
Vicor Lee

Re: process binding

Uday_S_Ankolekar — Mon, 26 Nov 2001 20:32:44 GMT

Hi,

PRM (Process Resource Manager) is the answer. But you need to buy this product

-USA..

Re: process binding

Rodney Hills — Mon, 26 Nov 2001 20:36:22 GMT

Although no command exists, if you want to do a little "c" programming, the mpctl function allows you to assign cpu's to processes.

do a "man mpctl"

-- Rod Hills

Re: process binding

Sridhar Bhaskarla — Mon, 26 Nov 2001 20:36:32 GMT

There is no straight command to bind a process to a processor. But there is a system call called mpctl to do this job. Check the man page for mpctl.

-Sri

Re: process binding

Sanjay_6 — Mon, 26 Nov 2001 21:10:29 GMT

Hi Victor,

Take a look at the thread below,

http://us-support.external.hp.com/cki/bin/doc.pl/sid=1844a418136193caea/screen=ckiDisplayDocument?docId=200000024626357

Hope this helps.

Regds

Re: process binding

harry d brown jr — Mon, 26 Nov 2001 22:30:26 GMT

Try mpsched and rtprio and rtsched.

live free or die
harry

Re: process binding

Deepak Extross — Tue, 27 Nov 2001 01:45:13 GMT

Before you consider this, let me point out that doing this will make your application tightly bound to (dependent on?) the hardware configuration.
The loss of portability is arguably the reason why we dont see too many people doing this.

Re: process binding

Bill Hassell — Tue, 27 Nov 2001 03:43:06 GMT

It's also important to note that virtually no value will be seen in binding a process to a processor. Nothing moves when a process is resumed on another processor--all RAM is accessible by all processors and for every context switch or kernel system call, the staeps required to get the process started again is identical regardles of which processor is selected.

If the binding is required to improve performance, be prepared to obseerve no measureable change.