On 10/18/2011 4:26 PM, Steven Hartland wrote:
----- Original Message ----- From: "Urmas Lett" <[email protected]>
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?
real 3m7.826s
user 6m49.813s
sys 0m1.581s
CPU: 0.0% user, 57.9% nice, 0.0% system, 0.0% interrupt, 42.1% idle
Mem: 116M Active, 18M Inact, 457M Wired, 112K Cache, 376M Buf, 3265M Free
Swap: 4096M Total, 4096M Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
1224 root 106 10 223M 117M CPU2 2 0:33 79.98%
ffmpeg{ffmpeg}
1224 root 52 10 223M 117M uwait 1 0:31 76.76%
ffmpeg{ffmpeg}
1224 root 94 10 223M 117M CPU3 3 0:20 40.77%
ffmpeg{ffmpeg}
1224 root 90 10 223M 117M CPU1 0 0:14 28.76%
ffmpeg{ffmpeg}
1215 root 20 0 67992K 5516K select 2 0:00 0.00% sshd
Regards,
Urmas Lett
Tel: +(372) 7 302 110
Fax: +(372) 7 302 111
E-Mail: [email protected]
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