ffmpeg & ULE

[Steven Hartland]

----- Original Message ----- 
From: "Urmas Lett" <urmas.lett at eenet.ee>


> On 10/18/2011 3:36 PM, Steven Hartland wrote:
>> What happens if you either:
>> 1. disable HT in the bios
> 
> Intel says i5-2400 has no HT:
> Processor Number i5-2400
> # of Cores 4
> # of Threads 4
> 
> and BIOS has no HT disable knob

Ahh yes of course.

> 
>> 2. limit the threads to 4?
> 
> ffmpeg -threads 4 (sched_ule):
> 
> real    3m19.379s (with -threads 0 was 2m52.711s)
> user    6m50.107s (with -threads 0 was 6m50.310s)
> sys     0m1.507s
> 
> top -H:
> CPU:  0.0% user, 55.8% nice,  0.4% system,  0.0% interrupt, 43.8% idle
> Mem: 136M Active, 884M Inact, 498M Wired, 84K Cache, 409M Buf, 2339M Free
> Swap: 4096M Total, 4096M Free
> 
>   PID USERNAME PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
>  1178 root      52   20   255M   140M uwait   1   1:05 51.17% 
> ffmpeg{ffmpeg}
>  1178 root     103   20   255M   140M CPU0    1   0:59 37.60% 
> ffmpeg{ffmpeg}
>  1178 root      52   20   255M   140M uwait   3   0:59 37.16% 
> ffmpeg{ffmpeg}
>  1178 root      52   20   255M   140M uwait   3   0:59 34.38% 
> ffmpeg{ffmpeg}
>  1178 root      52   20   255M   140M uwait   2   0:54 33.59% 
> ffmpeg{ffmpeg}
>  1178 root     102   20   255M   140M CPU2    0   0:46 32.37% 
> ffmpeg{ffmpeg}
>  1171 root      20    0 67992K  5516K select  2   0:00  0.00% sshd

That seems to be using 6 threads not 4, what about -threads 2?

    Regards
    Steve

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