Pentium 4's use hyperthreading to give you a 'virtual' second CPU.
Don't bother trying to get another instance of Prime95 running on that 2nd
CPU... It's virtual and while a lot of programs can benefit, the extreme
workout that Prime95 generates means you won't get a benefit from running a
second
Does your CPU have hyper-threading for sure, and it's enabled in the BIOS?
Task Manager will show one graph per CPU... If you only see a single graph,
your OS only thinks it has one CPU (counting all virtual and all real CPUs).
I also assume you're using WinNT/Win2k/WinXP since Win98/ME doesn't
I have a
Pentium 4 processor and TM indicates an average usage of close to 100% CPU for
Prime 95 - am I running 'multiple instances' without being aware of it? If so,
how do I prevent this if it will degrade efficiency?
Not all P4's have hyper threading
not all motherboards support it
p4 with 400 or 533Mhz FSB do not support hyperthreading, *EXCEPT* the
p4-3.06/533 does.
P4 with 800MHz FSB (these are the C versions) do support hyperthreading.
P4 Xeons all support HT.
I have a question... gotta couple of dual P4/Xeon 2.8 servers, running
linux 2.4.20 kernels... using
Not all P4's have hyper threading not all motherboards
support it on top of that. So it requires a HT enabled CPU,
HT enabled Motherboard, HT supported OS for HT to function.
Hmm... Yeah, I thought about that but I guess I just assumed he knew he had
a hyper-threading CPU.
Isn't it just
p4 with 400 or 533Mhz FSB do not support hyperthreading, *EXCEPT* the
p4-3.06/533 does.
P4 with 800MHz FSB (these are the C versions) do support
hyperthreading.
P4 Xeons all support HT.
Ahh... Good info.
does
anyone know
which of the 0,1,2,3 CPUs are the physical ones? meaning,
The standard way to identify is to have all physical CPU's listed first (0,1
in a dual CPU system) followed by the virtual CPU's (2,3)
Hmmm, looks like you are wrong... /proc/cpuinfo shows cpu 0,1 as being
one physical id, and cpu 2,3 as being the other..
# cat /proc/cpuinfo
At 04:35 PM 11/3/2003 -0800, John R Pierce wrote:
I don't know if the affinity stuff will work in linux, however..
Mprime ignores the affinity settings in the ini files. We'll have to
add it when linux 2.6 is released.
_
--On Monday, November 03, 2003 5:08 PM -0800 John R Pierce [EMAIL PROTECTED] wrote:
George Woltman wrote:
At 04:35 PM 11/3/2003 -0800, John R Pierce wrote:
I don't know if the affinity stuff will work in linux, however..
Mprime ignores the affinity settings in the ini files. We'll have to
