Hyper Threading

Hi youm0nt

I read your reply but it didnt make sense to me.  Can you rephrase it in English.

I really appreciate yor help and look forward to another reply.

hyper threading turns one physical cpu into two virtual processors but somone one turned on the HT feature on a 2.4b.
a 2.4b is a pentium 4 with 533 fsb

Message Edited by youm0nt on 05-10-2003 12:09 PM

"What is HyperThreading anyway and why would anybody actually need it? Very briefly, Simultaneous HyperThreading or HT... is a pseudo-substitute for symmetric multiprocessing (SMP) technology where, instead of having two CPUs, a single processor internally creates two virtual or logical processors. The idea behind HT is that handling data and instructions from two different applications in parallel rather than in a serial fashion will fill the gaps that naturally occur in the execution of either application with workload from the second application. As a result, the processor will be fully utilized rather than working in a stop and go fashion. "  (http://www.lostcircuits.com/cpu/p4_306/)

Hyperthreading tries to minimize idle cpu cycles by working on two threads at once. How much this helps in everyday performance? Try looking at some bechmarks of cpu's with and without HT and see which u like...

---

@youm0nt wrote:
hyper threading turns one physical cpu into two virtual processors but somone one turned on the HT feature on a 2.4b.
a 2.4b is a pentium 4 with 533 fsb

Message Edited by youm0nt on 05-10-2003 12:09 PM

---

Where did you find this? How did they enable HT on a 2.4B?

ristar did using an iwill board,it doesnt give instructions though :(.read this link

http://picserver.student.utwente.nl/getpicture.php?id=63774

Message Edited by youm0nt on 05-11-2003 08:45 AM

Message Edited by youm0nt on 05-11-2003 08:45 AM

     If you check the Intel chip development site you'll notice that HT was introduced on the P4 2.4 and higher.  It had to be enabled though.  Some companies didn't want customers screwing things up and most software at the time didn't take advantage of the technology,  they asked intel to permanently disable the HT for their systems.  Since everyone's on the same page regarding HT now,  its being reintroduced in all those 2.4 and up processors.  You'd have to check the intel site for serial numbers of the older chips to see if HT can be activated.

i'd really like to see this intel page..

Keep in mind that not all programs benefit from hyperthreading.  I recall that Adobe Photoshop, for example, would return far worse benchmarks (and occasionally freeze up) when HT was enabled.  Before you turn it on, make sure your software supports it... get all the latest versions and updates.

---

@Malinthas wrote:
Keep in mind that not all programs benefit from hyperthreading.  I recall that Adobe Photoshop, for example, would return far worse benchmarks (and occasionally freeze up) when HT was enabled.  Before you turn it on, make sure your software supports it... get all the latest versions and updates.

---

Adobe Photoshop 7 makes use of Hyper Threading, it runs faster with HT enabled. I have Photoshop 7, very fast, no freezing.

heyhey

I have hyper threading

and it's great. Just a little bit noisy (the fan)
what are you talking about? FREEZES the computer when HT is on and when I open Adobe Photoshop?
never happened to me

Im using HT and it's great.
It's faster in a sense (opening programs)

just expensive

The articla I read was referring to older versione of Adobe... as I said, more recent versions of software, or older applications with recent updates, should work fine.  I was simply warning against a hardware upgrade with software that may not be designed to properly handle it.

Is there anyway to stop hyperthreading for a particular app?

We have a program that does not like hyperthreading or dual processes, but I don't see the point in removing hyperthreading altogether.

Currently we have to go to the task manager everytime we start up and set the affinity for the process to use 1 cpu.

Any ideas.

Using Inspirion 5150