Ableton Forum

to those of you with a quad core and 8 threads...is Live using all 8 threads?

win7 64bit
jBridge

Short answer: no.

Long answer: no.

no one else using a quad core around here?

Nope, just tried on i7 2600k, just had 1 track with a sustained note and diva, duplicated up to 8 times first, only saw 4 threads in use. Then added 4 more at a time up to 16 and still only had the 4 threads

i7-2630QM here.. and took this screenshot to show the state of hyperthreading in Live

http://dl.dropbox.com/u/5558375/MULTICORE.jpg

8 tracks running DIVA and only 4 cores doing the work while virtual cores sit idle.

You can enable hyperthreading by using this line in options.txt

-ForceUseHyperThreading=1

I loaded up 14 tracks of DIVA playing a sustained note and actually saw all 8 cores working.

um, isn't this like, a big deal?

shadx312 wrote:um, isn't this like, a big deal?

certainly is for me

Definitely seeing some of my other heavy track count projects benefiting already.

cotdagoo wrote:You can enable hyperthreading by using this line in options.txt

-ForceUseHyperThreading=1

I loaded up 14 tracks of DIVA playing a sustained note and actually saw all 8 cores working.

ummm... you'll see all 8 cores working without that line added to the options.txt too
whatever that option line is for, it isnt enabled in the current 8.3, or it requires tester/dev knowledge to know how/when it works. like most of the hidden options in the thread you got it from. most of it is useless to the end user.

somebody try

-64bit=1

garyboozy wrote:

cotdagoo wrote:You can enable hyperthreading by using this line in options.txt

-ForceUseHyperThreading=1

I loaded up 14 tracks of DIVA playing a sustained note and actually saw all 8 cores working.

ummm... you'll see all 8 cores working without that line added to the options.txt too
whatever that option line is for, it isnt enabled in the current 8.3, or it requires tester/dev knowledge to know how/when it works. like most of the hidden options in the thread you got it from. most of it is useless to the end user.

Umm clearly by the image I'd posted the first time in this thread I didn't see all 8 cores working..

http://dl.dropbox.com/u/5558375/MULTICORE.jpg

Have a look..

Just did the same 'test' after adding the line to options.txt and the CPU meter used in that link showed all 8 cores being utilized.. not just the 4 "real" ones..

Here's the results AFTER adding the line that according to you does nothing:
http://dl.dropbox.com/u/5558375/multicore2.jpg

I actually had to make the new 'test' 14 tracks instead of the 8 just to get better utilization of all cores since things were clearly being processed differently and the load balanced more.

are you sure that isnt becuase in the first post you're running 8 diva's, and the second post you're running 14?
have you tried running 14 instances, both with and without the hyperthreading option to compare?

i tried it here when i saw that list originally and it didnt work. osx here though, not win7..

garyboozy wrote:are you sure that isnt becuase in the first post you're running 8 diva's, and the second post you're running 14?
have you tried running 14 instances, both with and without the hyperthreading option to compare?

Quite sure.. as each track takes a core.. so if you have a dual core cpu track 1 takes core 1, then track 2 takes core 2, track 3 takes core 1, track 4 takes core 2, etc.. etc..

Shouldn't matter the number of tracks so long as I have more than 4 to supposedly use my 4 'real' cores up.. so with 8 I should be seeing all virtual cores active as well as the real ones..

I'll post another jpg.. gimmie a few mins

edit: http://dl.dropbox.com/u/5558375/hypertest3.jpg

14 tracks, only 4 cores getting used..

cotdagoo wrote:

shadx312 wrote:um, isn't this like, a big deal?

certainly is for me

Definitely seeing some of my other heavy track count projects benefiting already.

That's what I'm saying, as far as I knew it didn't support multicore so this is like 2nd to 64-bit.
I have no doubt it's true because it's hidden in the options just like the "map all siblings to macro".