> I know Gentoo is Linux and Linux has SMP support. As I stated, I run a dual-933 SMP > system presently. But, how in the heck do you pick up 4CPUs with HyperThreading? I > thought HT was a memory-specific technology, not CPU? And do you actually see any > significant performance gains with your illusion of 4 CPUs? I wonder ...
I have noticed major performance boosts with HT. When you choose SMP as you compile the kernel, the kernel will automagically find 4 CPU's instead of 2. You can verify this in /proc/cpuinfo. There is a MAKEOPTS flag in /etc/make.conf that is worth looking at, it will help only when emerging things, but helpful I think. My system seems faster after I changed it to -j5, but I didn't measure things... HT will help you mainly if you have many threads. I am doing a lot with Java application servers that create boatloads of threads and my performance seems to really benefit from HT. I heard that 2.6 kernels have better support for HT, but I haven't read much definitive... Lloyd -- [EMAIL PROTECTED] mailing list
