Prime95 vs mprime
 

I've been running Prime95 on my main Windows box for a couple weeks now and have decided to give mprime a go on my Fedora home server. I'm no stranger to command line, but for the life of me I can't get it to run at 50% load in mprime like it does be default in Prime95, and it's giving me speed issues. Does anyone else using mprime experience something similar or have a fix?

One weird experience with mprime which I had 2 or 3 years ago was that a particular version, and sorry I don't remember which, ran at half speed. I left this situation for months, not quite knowing what to do about it. But when I finally upgraded to install the newest version of mprime, which is something I don't readily do, it was immediately back to running at normal speed. So it's just faintly possible that installing another version of mprime could be your solution too.

EDIT: That's a response to the general "speed issues" which you mention rather than any help about setting the load yourself, which is something I don't know how to do.

Sounds like your Windows box is hyperthreaded, which means it has for example 4 physical cores but it has 8 threads it can run. On such a machine Windows often reports only 50% cpu usage even if it runs as fast as possible.

Your Fedora system is either not hyperthreaded or Linux is better at reporting cpu usage on a hyperthreaded system.

or if your machine is hyperthreaded, mprime may not be detecting which logical CPUs form the physical CPUs. Try changing your worker threads to "run on any CPU".

You mentioned that the machine in question is a server. Do you know if it has multiple CPU [I]sockets[/I] (rather than just [I]cores[/I])? That is, how many physical processors are plugged into the motherboard?