HYPERTHREADING SUPPORT IN PRO TOOLS LE 6.7??

[Johnny916]

Hi all, just wondering if it ok to turn on hyper-threading now that I got the 6.7 update. Is it supported in this version???

[spkguitar]

From all three of the 6.7 compatibility pages (002/002r/mBox):

Pentium 4 or Xeon systems with HyperThreading technology must have "Intel HyperThreading" in the system BIOS disabled.

[fabco]

Does anyone know "why" hyperthreading is supposed to be an issue or is this just another case of Digi covering their rear because they just aren't sure, or is it only an issue in 6.7?

So far I'm running PT 6.4 just fine w/ hyperthreading enabled. I haven't tried all the plugin combinations yet, though.

Can anyone else who had a problem that was fixed by disabling hyperthreading please post what the problem was?

Also, can anyone who is successfully using PT w/ hyperthreading enabled pleas post as well?

Since, I've recently gone through getting PT up and running with RAID drives (which are also unsupported) I've come to doubt Digi's compatability list is actually very meaningful. I've started to think of it as as list of what they are pretty "sure" will work, not a list of the "only" H/W that works.

As a side note, If this really is an issue you can set the processor affinity in XP's Task Manager to ensure PT will only run on one of the two hyperthreading cores, just as you can if you actually have 2 cpus. This will force PT and only PT to run on one cpu, while letting the rest of your OS and other programs use both for more performance. Disabling hyperthreading in the bios would disable it for everything. Thre are also utilities that can automatically set this affinity for you every time PT runs such as:

http://www.appliedvisual.com/xcpu.htm

for those that are interested.

[bb_aus]

HT runs fine for me
i talked to the digi guy at the 6.7 launch and he said when they tested HT the systems became unstable but ive found windows in general to be more stable
the compatibility list is simply what digi have tested and certified to work with PT
HT seems to work for some and not others, i think it depends on the motherboard i have an Intel 865PERLL.

[Third Eye Studios]

Have you tried your system with and without HT? Do you get a performance gain from HT? Thanks.

[bb_aus]

As a side note, If this really is an issue you can set the processor affinity in XP's Task Manager to ensure PT will only run on one of the two hyperthreading cores, just as you can if you actually have 2 cpus. This will force PT and only PT to run on one cpu, while letting the rest of your OS and other programs use both for more performance. Disabling hyperthreading in the bios would disable it for everything. Thre are also utilities that can automatically set this affinity for you every time PT runs such as:

i find it best to let PT run on both threads, so that it runs the DAE on one and screen redraws etc on the other. then set other system tasks not to run on the same thread as the DAE (PT often changes which thread the DAE is running on when you change the H?/W buffer size)

[Rail Jon Rogut]

LE won't run on my system with HT enabled.. it'll depend upon your motherboard.

Rail

[sunnywheat]

hows it going you seem to know more about whats going on than digi i am running protools with hyper didabled could this be why my cpu flies though the roof when i use plugins i have a gig of ram and i think that its split up to both hard drives is this correct? ps i am currently on 6.4 thanks a million joey

[bb_aus]

Have you tried your system with and without HT? Do you get a performance gain from HT? Thanks.

world performace seems to be greater, from the first time i enabled HT and then after i re-enabled it after disabling it to test it
however as far as the davec test goes performace went down (sorry dont have results on hand)

i say if ur system is running fine with or without HT just leave it as it is
1 thing to remember if HT has been enabled windows will configure its self as a multiprocessor system, disabling HT does not reconfigure windows and you must do it manually. also if HT is enabled check that windows is configured for multi processor. nomatter what hardware/bios config the wrong windows config will mean the system runs like crap

[Third Eye Studios]

Where is all this configured in windows?