Subject Re: [ib-support] FB Hyper Threading and Performance
Author Phil Shrimpton
On Friday 28 February 2003 08:20, you wrote:


> 1. Do you have experience with FB running on P4 with hyper threading? Are
> there problems regarding that the processor reports itself as MPU?

If you are using the SS version of FB (or < IB7) on Windows 2000 and below,
you will need to disable hyperthreading in the Bios. The Classic version is
fine on Windows, and will use 'both' CPU's well. If you are running the SS
version on Linux with a recent kernel, you don't have to disable
hyperthreading, but you do need to set the affinity of the FB process to a
'single' CPU. The Classic version is fine on Linux and will use 'both' CPU's.

Windows XP is supposed to handle HT correctly, but I have no experience of

> 2. How much faster is FB running on Linux than FB running on W2K
> Server? Any benchmarks or observations?

At least as fast, and a lot of times faster IMO. But even is it wasn't
faster, the additional stability is worth the 'move'


Linux 2.4.4-4GB
8:10am up 45 days, 13:59, 1 user, load average: 0.39, 0.09, 0.03