hyperthreaded CPU

Question

I had read somewhere that an HT CPU would give you a view of 2 processors in Task Mgr, and processes could be assigned to a certain processor. I don't have this view in Task Mgr. How can I view processor usage?   TIA infael

ejn63 · Answer

What system do you have?

bacillus · Answer

You can't specify which logical processor does which process.
if you do indeed have a CPU with hyperthreading enabled then to view 2 CPUs in task manager click on the performance tab> view> CPU history and select one graph per CPU.

LS1Chris · Answer

I use this method on MS Flight Sim 2004, here's the prodecure copied from my tweaks manual:   After starting FS, go into task manager (CTRL_ALT_DEL)Select Processes tabRight click on FS9.exe, select 'Set Affinity'Disable one of the two check boxes so that FS9 only runs on one virtual CPU.Do the same on any other running utilities and select the other virtual processor.   Users who run a lot of extra software report as much as a doubling in frame rates. This, of course, assumes that hyperthreading is supported and enabled on your motherboard and BIOS settings. So the same applies except the program listed can be something else. Message Edited by LS1Chris on 11-30-2004 02:34 PM

infael · Answer

I have an Inspiron 9100.

LS1Chris · Answer

It works for me, I have Pent. 4 with HT. No downside to it either other than manually setting it everytime I want to run FS2004.

TDunn · Answer

That's a cool concept. But is FS dual processor aware in the first place?
If it's not then maybe it's losing some performance dealing with a dual setup
to make such an impact by designating a single CPU. Otherwise, I don't see
why a program that is dual processor aware would perform better by going to one.

I haven't used the Set Affinity setting yet so it will be fun to check it out.

Thanks for the heads up on that one LS1Chris.................TD

anettis · Answer

I think the reason this trick increases performance is because it essentially provides a virtual CPU exclusively for FS.  All other tasks are being setup on the other virtual CPU.  This means that all sorts of interrupt requests assocaited with other background tasks won't need to be serviced by the virtual CPU that is running FS.

LS1Chris · Answer

^^^^exactly the point. Is the AGP Aperture set to 64mb default with my Nvidia GeForce FX Go5200? Message Edited by LS1Chris on 11-30-2004 08:10 PM

4fluke · Answer

Interesting tweak - do you have more of these that you could share with us?

TDunn · Answer

So you're saying that by assigning a process this way isolates that process to the selected
processor and keeps everything else on the other?
This is worthy of some Intel white paper reading. Very cool........TD

LS1Chris · Answer

4fluke, I will take a look and see if i can dig any more out of CPU tricks for simulators.   TDunn, correct.

4fluke · Answer

Many thanks - it will certainly make for interesting reading (as well as upping my various flight sims performance!)

LS1Chris · Answer

All I can find useful is:   Keep your hard drive at least 50% free space Have at least 1 gig of RAM.

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hyperthreaded CPU

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