[lkml]   [2003]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRE: SMP question

> I'm building a hard real-time Linux (RTLinux) system on a 2x Xeon
> machine. If
> I compile and run a 2.4.18 kernel with SMP support, rtlinux hangs the
> machine. However, with SMP disabled, rtlinux and all it's hard-realtime
> applications runs okay.

> So, I have to deside between these two:

> - Run rtlinux and hard-realtime applications on a kernel without
> SMP support.
> How much performance will I loose this way? Is SMP *THAT* critical?

You will lose about half your CPU power.

> - Run all tasks in a usual way, no hard realtime, but with SMP support.

> What would you suggest?

If you don't install a kernel with SMP support, you might as well remove
one processor.

> Also, if I turn hyperthreading off, how will it influence the
> system with SMP
> support? Without SMP support?

In a system with more than one physical CPU, hyperthreading is not that big
of a performance boost.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:36    [W:0.038 / U:20.376 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site