Number of threads?

[Stuntman]

I have a dual cored AthlonXP system.. if I want to fully utilize the cores for transcoding.. how would I add the line properly to Sage properties?

If xcode_process_num_threads=1 means single, and if
xcode_process_num_threads=0 means # of CPU's +1

Then... what would be correct for 2 cpu'?

Probably a dumb question, but one I need help on!

I also assume this line needs to be added as I didn't find it in the properties file at all after the update to 6.5.2

[gplasky]

I would think the first option (1 or x) just tells Sage how many threads regardless of the # of CPUs. And those threads would only run on 1 CPU (?).
The second option (0) would use the CPU plus 1 more thread per CPU. So with a quad it could engage all 4 CPUs with a thread for the process running on each CPU.

Gerry

[Opus4]

Originally Posted by Stuntman

If xcode_process_num_threads=1 means single, and if
xcode_process_num_threads=0 means # of CPU's +1

Then... what would be correct for 2 cpu'?

You left out part of the release note on that property:

Originally Posted by Narflex

1. Enabled multi-threading for the transcoder. The property xcode_process_num_threads controls this. 1 means single threaded; 0 means use the # of CPUs plus one; and all other positive settings mean use that # of threads.

I'm not sure I fully understand the use of 0, but you could use '2' or '0'.

- Andy

[babgvant]

Originally Posted by gplasky

I would think the first option (1 or x) just tells Sage how many threads regardless of the # of CPUs. And those threads would only run on 1 CPU (?).
The second option (0) would use the CPU plus 1 more thread per CPU. So with a quad it could engage all 4 CPUs with a thread for the process running on each CPU.

Gerry

Unless the application is setting affinity, even 1 thread could run across multiple CPUs.

[MrD]

0 = number cpus + 1 threads
1 = single threaded
x = any number of threads

I would use "x" to run less than the total number of cpus (i.e. 2-3 for quad cores)

Running more threads than available cpus only serves to take resources away from other processes.

[quantumstate]

I know that when compiling big apps, you want to set -j to the number of CPUs plus one, two, or three. This ensures the CPU stays busy even on context-switching. And man, it flies.

I say 0 is correct here.

You don't need to worry about the CPU taking away from other processes as long as transcoding is set to a higher Nice level in the settings.

[MrD]

Originally Posted by quantumstate

I know that when compiling big apps, you want to set -j to the number of CPUs plus one, two, or three. This ensures the CPU stays busy even on context-switching. And man, it flies.

I say 0 is correct here.

You don't need to worry about the CPU taking away from other processes as long as transcoding is set to a higher Nice level in the settings.

Normally on windows you use the process priority through the UI to set priority, otherwise it needs to be done through code. I did not see a parameter to control thread priority; I'm assuming all threads run at "normal" priority. Those threads will compete evenly with all other normal priority threads.

see here

http://www.microsoft.com/technet/pro....mspx?mfr=true

[quantumstate]

There is a setting in the Sage setup for transcoding priority, if memory serves.

Mine's busted right now, so can't check.

[CollinR]

Yes, xcode_process_priority there are a couple so you can setup streaming with a higher priority then generating thumbnails and normal compression jobs.