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Old 04-05-2013, 11:04 PM   #1
H5X00R
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About CPUs, threads and ffmpeg


Hello,

Ffmpeg has an option called threads which speeds up encoding. I have an AMD Phenom Triple-Core Processor and I ran this command to check for threads so I can use that info for the threads option of ffmpeg.

Here is the output of lscpu
Quote:
Architecture: i686
CPU op-mode(s): 64-bit
CPU(s): 3
Thread(s) per core: 1
Core(s) per socket: 3
CPU socket(s): 1
Vendor ID: AuthenticAMD
CPU family: 16
Model: 2
Stepping: 3
CPU MHz: 2100.000
Virtualization: AMD-V
L1d cache: 64K
L1i cache: 64K
L2 cache: 512K
L3 cache: 2048K
Does this mean that my machine sees 6 cores from the info above?

i.e Three cores plus one thread per core = six cores

Let me know if my assumption is correct. Thanks

Last edited by H5X00R; 04-05-2013 at 11:05 PM.
 
Old 04-06-2013, 12:12 AM   #2
syg00
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Quote:
Originally Posted by H5X00R View Post
Does this mean that my machine sees 6 cores from the info above?

i.e Three cores plus one thread per core = six cores
Very strange "logic".
You have 3 cores, each of which can run 1 thread - i.e. not hiper-threaded.
 
Old 04-06-2013, 12:26 AM   #3
H5X00R
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deleted double post

Last edited by H5X00R; 04-06-2013 at 01:10 AM.
 
Old 04-06-2013, 01:05 AM   #4
H5X00R
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Hello,

I found this link which explains CPUs and threads counts in linux
http://dbastreet.com/blog/?p=469

So, I was wrong about having six cores. My system sees four cores max. i.e 3 cores plus one thread and hyperthreading is unavailable in my bios.

Last edited by H5X00R; 04-06-2013 at 01:25 AM.
 
  


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