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The way to bind a particular process to a particular CPU is via the pbind command. &nbsp;You can use the system library call processor_bind to do the same thing at the thread level within a program. <br />
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Your benchmark sounds a little simplistic. I don't think it is going to tell you much with any general validity. What is your purpose in doing this benchmark? 
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Hi, we are going to induce a load on the server under evaluation and induce the same load on a production box and model the two via TeamQuest. This will give us a baseline of todays production to model against &nbsp;a more prowerfull server to determine potential future capacity if we were to take on the new server.<br />
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I have just found out the C program developed in house to induce the CPU process is also only single threaded (via ps -eo args,nlwp) but as the server we are evaluating has 24 CPU's with 48 cores and 96 threads I think it will not give us the load we want. So I guess my original question is now invalid. New question - do you know where I can get an executable that can induce various CPU loads to tick over and thrash such a server utilising all 48 cores and 96 threads ? 
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Ok Thanks will look into that. I understand what you are saying about our own apps and you are correct. &nbsp;However before we start modelling we need to ensure our baseline is accurate and that TeamQuest is working, Teamquest allows us to model a virtual server on a real baseline taken from real production server, we then model the same load on a real version of the server that was virtually modelled and if the results are the same we know TeamQuest is accurate and that our baseline is valid. Than we can apply our application loads. So to create the baseline I wanted a CPU load enducing process.<br />
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thanks for your help
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Hi,<br />
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We need to bench test the CPU horse power of a server we have on evaluation. This is a 24 CPU box. A colleague of mine wrote &nbsp;a simple C program that induces Floating Point Operations on each CPU by a simple looping, we have been running this at about 20 billion loops/FPO's. The C program provides a parameter for us to say how many CPU's to load up and I was wondering when you write in C how you process a loop on a specific CPU (i.e. any 1 of the 24). Looking at the source the C program says &quot;execute( cpu, loop counter)&quot; is this correct ?
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Hi,

We need to bench test the CPU horse power of a server we have on evaluation. This is a 24 CPU box. A colleague of mine wrote  a simple C program that induces Floating Point Operations on each CPU by a simple looping, we have been running this at about 20 billion loops/FPO's. The C program provides a parameter for us to say how many CPU's to load up and I was wondering when you write in C how you process a loop on a specific CPU (i.e. any 1 of the 24). Looking at the source the C program says "execute( cpu, loop counter)" is this correct ?

Bench Testing CPU Performance

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.