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Gerd
Posts: 66
Joined: Wed Mar 16, 2016 10:48 am
Location: Europe

Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 3:50 pm

elpi1kl-jpg - Kopie.jpg
elpi1kl-jpg - Kopie.jpg (63.35 KiB) Viewed 2008 times
The Pi3 needs cooling, that turned out very fast. So I saw what I had at home and found an old 38mmx38mm chipset heatspreader. Initially I wanted to saw it in smaller pieces and glue one on the CPU/GPU. But then I thought about how LED installations are cooled, here the heatspreader are bigger than the LED. The question arose: How large do I need the heatspreader to be to stay under 80°C?
Reading http://lisafea.com/pdf/Convection_heat_ ... icient.pdf helped a lot. I could follow their calculations and based on them do my own. Result: I would need the whole heatspreader, but cut one corner to fit to the board.
And this morning it came true: my Elephant Pi ran cpuburn-a53 for over 1 hour, only PASSIVELY (=no fan) cooled, with temperature between 77 and 79°C. No throtteling!. Ambient: 18°C.
This ran at stock speed, only change in config.txt is over_voltage=2, because my pi needs it to run stable (see viewtopic.php?f=63&t=139712). sysbench runs at 53°C for 1 hour.

I think I have to add some lines for the sceptic.

Code: Select all

pi@raspberrypi:~ $ top
top - 10:18:32 up 13:38,  5 users,  load average: 4,09, 4,15, 4,16
Tasks: 133 total,   5 running, 128 sleeping,   0 stopped,   0 zombie
%Cpu(s):100,0 us,  0,0 sy,  0,0 ni,  0,0 id,  0,0 wa,  0,0 hi,  0,0 si,  0,0 st
KiB Mem:    964004 total,   131012 used,   832992 free,    11700 buffers
KiB Swap:   102396 total,        0 used,   102396 free.    70632 cached Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
19820 pi        20   0    1680    324    268 R  99,8  0,0  67:49.02 cpuburn-a53
19821 pi        20   0    1680     84     16 R  99,8  0,0  67:38.32 cpuburn-a53
19822 pi        20   0    1680     84     16 R  99,8  0,0  67:40.60 cpuburn-a53
19823 pi        20   0    1680     88     16 R  99,5  0,0  67:48.20 cpuburn-a53
19813 pi        20   0    5752   2612   2132 R   0,7  0,3   0:20.47 top
    1 root      20   0    5476   3920   2780 S   0,0  0,4   0:05.02 systemd
    2 root      20   0       0      0      0 S   0,0  0,0   0:00.00 kthreadd
pi@raspberrypi:~ $ while true; do uptime; vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done
 09:08:00 up 12:28,  5 users,  load average: 0,00, 0,01, 0,05
frequency(45)=600000000
temp=31.6'C
 09:08:11 up 12:28,  5 users,  load average: 0,00, 0,01, 0,05
frequency(45)=1200000000
temp=35.9'C
 09:08:21 up 12:28,  5 users,  load average: 0,40, 0,10, 0,07
frequency(45)=1200000000
temp=39.7'C
 09:08:31 up 12:28,  5 users,  load average: 0,95, 0,23, 0,12
frequency(45)=1200000000
temp=41.3'C
 09:08:41 up 12:28,  5 users,  load average: 1,42, 0,35, 0,16
frequency(45)=1200002000
temp=42.4'C
 09:08:51 up 12:28,  5 users,  load average: 1,82, 0,47, 0,20
frequency(45)=1200000000
temp=44.0'C
 09:09:01 up 12:29,  5 users,  load average: 2,15, 0,59, 0,24
frequency(45)=1200000000
temp=45.1'C
 09:09:11 up 12:29,  5 users,  load average: 2,44, 0,70, 0,28
frequency(45)=1200000000
temp=46.2'C
 09:09:21 up 12:29,  5 users,  load average: 2,68, 0,81, 0,32
frequency(45)=1200000000
temp=47.2'C
 09:09:31 up 12:29,  5 users,  load average: 2,88, 0,91, 0,36
frequency(45)=1200000000
temp=47.8'C
 09:09:41 up 12:29,  5 users,  load average: 3,05, 1,01, 0,40
frequency(45)=1200000000
temp=49.4'C
 09:09:51 up 12:29,  5 users,  load average: 3,20, 1,11, 0,44
frequency(45)=1200000000
temp=50.5'C
 09:10:01 up 12:30,  5 users,  load average: 3,32, 1,21, 0,47
frequency(45)=1200000000
temp=51.0'C
 09:10:11 up 12:30,  5 users,  load average: 3,43, 1,30, 0,51
frequency(45)=1200000000
temp=52.1'C
 09:10:21 up 12:30,  5 users,  load average: 3,51, 1,39, 0,55
frequency(45)=1200000000
temp=52.6'C
 09:10:31 up 12:30,  5 users,  load average: 3,59, 1,47, 0,59
frequency(45)=1200000000
temp=53.7'C
 09:10:41 up 12:30,  5 users,  load average: 3,73, 1,57, 0,63
frequency(45)=1200000000
temp=54.2'C
 09:10:51 up 12:30,  5 users,  load average: 3,77, 1,65, 0,67
frequency(45)=1200002000
temp=54.8'C
 09:11:01 up 12:31,  5 users,  load average: 3,80, 1,73, 0,70
frequency(45)=1200000000
temp=56.4'C
 09:11:11 up 12:31,  5 users,  load average: 3,83, 1,81, 0,74
frequency(45)=1200000000
temp=56.4'C
 09:11:21 up 12:31,  5 users,  load average: 3,86, 1,88, 0,77
frequency(45)=1200000000
temp=58.0'C
 09:11:31 up 12:31,  5 users,  load average: 3,96, 1,96, 0,81
frequency(45)=1200000000
temp=58.5'C
 09:11:41 up 12:31,  5 users,  load average: 4,04, 2,05, 0,85
frequency(45)=1200000000
temp=58.0'C
 09:11:51 up 12:31,  5 users,  load average: 4,03, 2,11, 0,88
frequency(45)=1200000000
temp=59.1'C
 09:12:01 up 12:32,  5 users,  load average: 4,03, 2,17, 0,92
frequency(45)=1200000000
temp=60.1'C
 09:12:11 up 12:32,  5 users,  load average: 4,02, 2,23, 0,95
frequency(45)=1200000000
temp=60.7'C
 09:12:21 up 12:32,  5 users,  load average: 4,02, 2,29, 0,98
frequency(45)=1200000000
temp=61.2'C
 09:12:31 up 12:32,  5 users,  load average: 4,02, 2,35, 1,02
frequency(45)=1200000000
temp=61.8'C
 09:12:41 up 12:32,  5 users,  load average: 4,09, 2,42, 1,05
frequency(45)=1200000000
temp=62.3'C
 09:12:51 up 12:32,  5 users,  load average: 4,23, 2,50, 1,10
frequency(45)=1200000000
temp=62.3'C
 09:13:01 up 12:33,  5 users,  load average: 4,27, 2,57, 1,13
frequency(45)=1200000000
temp=62.8'C
 09:13:11 up 12:33,  5 users,  load average: 4,23, 2,62, 1,16
frequency(45)=1200000000
temp=63.4'C
 09:13:21 up 12:33,  5 users,  load average: 4,19, 2,66, 1,19
frequency(45)=1200000000
temp=64.5'C
 09:13:31 up 12:33,  5 users,  load average: 4,16, 2,71, 1,22
frequency(45)=1200000000
temp=64.5'C
 09:13:41 up 12:33,  5 users,  load average: 4,14, 2,75, 1,25
frequency(45)=1200000000
temp=65.0'C
 09:13:51 up 12:33,  5 users,  load average: 4,12, 2,79, 1,28
frequency(45)=1200000000
temp=65.5'C
 09:14:01 up 12:34,  5 users,  load average: 4,10, 2,83, 1,31
frequency(45)=1200000000
temp=66.6'C
 09:14:11 up 12:34,  5 users,  load average: 4,24, 2,90, 1,35
frequency(45)=1200002000
temp=65.5'C
 09:14:21 up 12:34,  5 users,  load average: 4,20, 2,94, 1,38
frequency(45)=1199998000
temp=66.6'C
 09:14:31 up 12:34,  5 users,  load average: 4,17, 2,97, 1,41
frequency(45)=1200000000
temp=66.6'C
 09:14:41 up 12:34,  5 users,  load average: 4,22, 3,02, 1,44
frequency(45)=1200000000
temp=67.7'C
 09:14:51 up 12:34,  5 users,  load average: 4,19, 3,06, 1,47
frequency(45)=1200000000
temp=67.7'C
 09:15:01 up 12:35,  5 users,  load average: 4,31, 3,12, 1,51
frequency(45)=1200002000
temp=67.7'C
 09:15:11 up 12:35,  5 users,  load average: 4,34, 3,16, 1,54
frequency(45)=1200002000
temp=68.2'C
 09:15:21 up 12:35,  5 users,  load average: 4,29, 3,19, 1,56
frequency(45)=1200000000
temp=68.8'C
 09:15:31 up 12:35,  5 users,  load average: 4,24, 3,22, 1,59
frequency(45)=1200000000
temp=68.8'C
 09:15:41 up 12:35,  5 users,  load average: 4,29, 3,26, 1,62
frequency(45)=1200000000
temp=68.8'C
 09:15:51 up 12:35,  5 users,  load average: 4,32, 3,30, 1,65
frequency(45)=1200000000
temp=69.8'C
 09:16:01 up 12:36,  5 users,  load average: 4,43, 3,36, 1,69
frequency(45)=1200002000
temp=70.4'C
 09:16:11 up 12:36,  5 users,  load average: 4,51, 3,41, 1,72
frequency(45)=1200000000
temp=69.8'C
 09:16:21 up 12:36,  5 users,  load average: 4,59, 3,46, 1,76
frequency(45)=1200000000
temp=70.9'C
 09:16:32 up 12:36,  5 users,  load average: 4,65, 3,51, 1,79
frequency(45)=1200000000
temp=70.9'C
 09:16:42 up 12:36,  5 users,  load average: 4,63, 3,55, 1,82
frequency(45)=1200000000
temp=70.9'C
 09:16:52 up 12:36,  5 users,  load average: 4,68, 3,60, 1,86
frequency(45)=1200000000
temp=72.0'C
 09:17:02 up 12:37,  5 users,  load average: 4,73, 3,64, 1,89
frequency(45)=1200000000
temp=71.4'C
 09:17:12 up 12:37,  5 users,  load average: 4,69, 3,67, 1,92
frequency(45)=1200000000
temp=72.0'C
 09:17:22 up 12:37,  5 users,  load average: 4,59, 3,68, 1,94
frequency(45)=1200000000
temp=72.5'C
 09:17:32 up 12:37,  5 users,  load average: 4,50, 3,69, 1,96
frequency(45)=1200000000
temp=73.1'C
 09:17:42 up 12:37,  5 users,  load average: 4,42, 3,70, 1,98
frequency(45)=1200000000
temp=72.5'C
 09:17:52 up 12:37,  5 users,  load average: 4,36, 3,71, 2,01
frequency(45)=1199998000
temp=73.1'C
 09:18:02 up 12:38,  5 users,  load average: 4,37, 3,74, 2,03
frequency(45)=1200002000
temp=73.1'C
 09:18:12 up 12:38,  5 users,  load average: 4,32, 3,75, 2,05
frequency(45)=1200000000
temp=73.1'C
 09:18:22 up 12:38,  5 users,  load average: 4,27, 3,75, 2,08
frequency(45)=1200000000
temp=73.1'C
 09:18:32 up 12:38,  5 users,  load average: 4,23, 3,76, 2,10
frequency(45)=1200000000
temp=73.6'C
 09:18:42 up 12:38,  5 users,  load average: 4,19, 3,77, 2,12
frequency(45)=1199998000
temp=74.1'C
 09:18:52 up 12:38,  5 users,  load average: 4,16, 3,78, 2,14
frequency(45)=1200000000
temp=73.6'C
 09:19:02 up 12:39,  5 users,  load average: 4,22, 3,80, 2,16
frequency(45)=1200000000
temp=74.7'C
 09:19:12 up 12:39,  5 users,  load average: 4,42, 3,86, 2,20
frequency(45)=1200000000
temp=74.7'C
 09:19:22 up 12:39,  5 users,  load average: 4,43, 3,88, 2,22
frequency(45)=1200002000
temp=74.7'C
 09:19:32 up 12:39,  5 users,  load average: 4,36, 3,88, 2,24
frequency(45)=1200000000
temp=75.2'C
 09:19:42 up 12:39,  5 users,  load average: 4,31, 3,89, 2,26
frequency(45)=1200002000
temp=75.2'C
 09:19:52 up 12:39,  5 users,  load average: 4,26, 3,89, 2,28
frequency(45)=1200000000
temp=75.8'C
 09:20:02 up 12:40,  5 users,  load average: 4,30, 3,91, 2,30
frequency(45)=1200000000
temp=76.3'C
 09:20:12 up 12:40,  5 users,  load average: 4,41, 3,95, 2,33
frequency(45)=1200000000
temp=76.3'C
 09:20:22 up 12:40,  5 users,  load average: 4,49, 3,98, 2,36
frequency(45)=1200000000
temp=76.8'C
 09:20:32 up 12:40,  5 users,  load average: 4,42, 3,98, 2,38
frequency(45)=1200000000
temp=76.3'C
 09:20:42 up 12:40,  5 users,  load average: 4,35, 3,98, 2,39
frequency(45)=1200000000
temp=76.3'C
 09:20:52 up 12:40,  5 users,  load average: 4,30, 3,98, 2,41
frequency(45)=1200000000
temp=76.3'C
 09:21:02 up 12:41,  5 users,  load average: 4,25, 3,99, 2,43
frequency(45)=1200000000
temp=76.3'C
 09:21:12 up 12:41,  5 users,  load average: 4,21, 3,99, 2,45
frequency(45)=1200000000
temp=76.3'C
 09:21:22 up 12:41,  5 users,  load average: 4,18, 3,99, 2,46
frequency(45)=1200000000
temp=77.4'C
 09:21:32 up 12:41,  5 users,  load average: 4,23, 4,00, 2,48
frequency(45)=1200000000
temp=77.4'C
 09:21:42 up 12:41,  5 users,  load average: 4,35, 4,03, 2,51
frequency(45)=1200000000
temp=77.4'C
 09:21:52 up 12:41,  5 users,  load average: 4,45, 4,07, 2,54
frequency(45)=1200000000
temp=76.8'C
 09:22:02 up 12:42,  5 users,  load average: 4,45, 4,08, 2,56
frequency(45)=1200000000
temp=77.4'C
 09:22:12 up 12:42,  5 users,  load average: 4,38, 4,08, 2,57
frequency(45)=1200000000
temp=77.4'C
 09:22:22 up 12:42,  5 users,  load average: 4,33, 4,07, 2,59
frequency(45)=1200000000
temp=76.8'C
 09:22:32 up 12:42,  5 users,  load average: 4,35, 4,09, 2,61
frequency(45)=1200000000
temp=77.4'C
 09:22:42 up 12:42,  5 users,  load average: 4,30, 4,09, 2,63
frequency(45)=1200000000
temp=77.4'C
 09:22:52 up 12:42,  5 users,  load average: 4,25, 4,08, 2,64
frequency(45)=1200000000
temp=77.4'C
 09:23:02 up 12:43,  5 users,  load average: 4,37, 4,11, 2,67
frequency(45)=1200000000
temp=76.8'C
 09:23:12 up 12:43,  5 users,  load average: 4,38, 4,13, 2,69
frequency(45)=1200000000
temp=77.4'C
 09:23:22 up 12:43,  5 users,  load average: 4,32, 4,12, 2,70
frequency(45)=1200000000
temp=77.9'C
 09:23:32 up 12:43,  5 users,  load average: 4,27, 4,12, 2,71
frequency(45)=1200000000
temp=77.9'C
 09:23:42 up 12:43,  5 users,  load average: 4,23, 4,11, 2,73
frequency(45)=1200000000
temp=77.9'C
 09:23:52 up 12:43,  5 users,  load average: 4,20, 4,11, 2,74
frequency(45)=1200000000
temp=78.4'C
 09:24:02 up 12:44,  5 users,  load average: 4,40, 4,16, 2,77
frequency(45)=1200000000
temp=77.4'C
 09:24:12 up 12:44,  5 users,  load average: 4,49, 4,18, 2,79
frequency(45)=1200000000
temp=77.9'C
 09:24:22 up 12:44,  5 users,  load average: 4,57, 4,21, 2,82
frequency(45)=1200000000
temp=77.9'C
 09:24:32 up 12:44,  5 users,  load average: 4,48, 4,20, 2,83
frequency(45)=1200000000
temp=77.4'C
 09:24:43 up 12:44,  5 users,  load average: 4,41, 4,20, 2,84
frequency(45)=1200000000
temp=77.9'C
 09:24:53 up 12:44,  5 users,  load average: 4,35, 4,19, 2,86
frequency(45)=1200000000
temp=77.9'C
 09:25:03 up 12:45,  5 users,  load average: 4,29, 4,18, 2,87
frequency(45)=1200000000
temp=77.4'C
 09:25:13 up 12:45,  5 users,  load average: 4,25, 4,18, 2,88
frequency(45)=1200002000
temp=77.9'C
 09:25:23 up 12:45,  5 users,  load average: 4,21, 4,17, 2,89
frequency(45)=1200000000
temp=77.4'C
 09:25:33 up 12:45,  5 users,  load average: 4,18, 4,17, 2,90
frequency(45)=1200000000
temp=77.4'C
 09:25:43 up 12:45,  5 users,  load average: 4,23, 4,18, 2,92
frequency(45)=1200000000
temp=77.9'C
 09:25:53 up 12:45,  5 users,  load average: 4,35, 4,20, 2,94
frequency(45)=1200002000
temp=77.4'C
 09:26:03 up 12:46,  5 users,  load average: 4,29, 4,20, 2,95
frequency(45)=1200000000
temp=77.9'C
 09:26:13 up 12:46,  5 users,  load average: 4,25, 4,19, 2,97
frequency(45)=1200000000
temp=77.9'C
 09:26:23 up 12:46,  5 users,  load average: 4,21, 4,18, 2,98
frequency(45)=1200000000
temp=77.4'C
 09:26:33 up 12:46,  5 users,  load average: 4,18, 4,18, 2,99
frequency(45)=1200002000
temp=77.9'C
 09:26:43 up 12:46,  5 users,  load average: 4,15, 4,17, 3,00
frequency(45)=1199998000
temp=77.9'C
 09:26:53 up 12:46,  5 users,  load average: 4,13, 4,17, 3,01
frequency(45)=1199998000
temp=77.9'C
 09:27:03 up 12:47,  5 users,  load average: 4,11, 4,16, 3,02
frequency(45)=1200000000
temp=77.9'C
 09:27:13 up 12:47,  5 users,  load average: 4,09, 4,16, 3,03
frequency(45)=1200000000
temp=78.4'C
 09:27:23 up 12:47,  5 users,  load average: 4,16, 4,17, 3,05
frequency(45)=1199998000
temp=77.9'C
 09:27:33 up 12:47,  5 users,  load average: 4,37, 4,21, 3,07
frequency(45)=1200000000
temp=77.9'C
 09:27:43 up 12:47,  5 users,  load average: 4,46, 4,24, 3,09
frequency(45)=1200002000
temp=78.4'C
 09:27:53 up 12:47,  5 users,  load average: 4,39, 4,23, 3,10
frequency(45)=1200002000
temp=79.0'C
 09:28:03 up 12:48,  5 users,  load average: 4,33, 4,22, 3,11
frequency(45)=1200000000
temp=78.4'C
 09:28:13 up 12:48,  5 users,  load average: 4,28, 4,22, 3,12
frequency(45)=1200000000
temp=78.4'C
 09:28:23 up 12:48,  5 users,  load average: 4,24, 4,21, 3,13
frequency(45)=1200000000
temp=78.4'C
 09:28:33 up 12:48,  5 users,  load average: 4,20, 4,20, 3,14
frequency(45)=1200000000
temp=78.4'C
 09:28:43 up 12:48,  5 users,  load average: 4,32, 4,23, 3,16
frequency(45)=1200000000
temp=79.0'C
 09:28:53 up 12:48,  5 users,  load average: 4,43, 4,25, 3,18
frequency(45)=1200000000
temp=79.0'C
 09:29:03 up 12:49,  5 users,  load average: 4,52, 4,28, 3,20
frequency(45)=1200000000
temp=79.0'C
 09:29:13 up 12:49,  5 users,  load average: 4,51, 4,29, 3,21
frequency(45)=1200000000
temp=79.5'C
 09:29:23 up 12:49,  5 users,  load average: 4,43, 4,28, 3,22
frequency(45)=1200000000
temp=79.5'C
 09:29:33 up 12:49,  5 users,  load average: 4,37, 4,27, 3,23
frequency(45)=1200000000
temp=79.5'C
 09:29:43 up 12:49,  5 users,  load average: 4,31, 4,26, 3,24
frequency(45)=1200000000
temp=79.5'C
 09:29:53 up 12:49,  5 users,  load average: 4,26, 4,25, 3,25
frequency(45)=1200000000
temp=79.5'C
 09:30:03 up 12:50,  5 users,  load average: 4,22, 4,24, 3,25
frequency(45)=1200000000
temp=79.5'C
 09:30:13 up 12:50,  5 users,  load average: 4,19, 4,23, 3,26
frequency(45)=1200000000
temp=79.0'C
 09:30:23 up 12:50,  5 users,  load average: 4,16, 4,23, 3,27
frequency(45)=1200000000
temp=79.5'C
 09:30:33 up 12:50,  5 users,  load average: 4,13, 4,22, 3,28
frequency(45)=1200000000
temp=79.5'C
 09:30:43 up 12:50,  5 users,  load average: 4,27, 4,24, 3,30
frequency(45)=1200000000
temp=80.1'C
 09:30:53 up 12:50,  5 users,  load average: 4,23, 4,24, 3,30
frequency(45)=1200000000
temp=79.5'C
 09:31:03 up 12:51,  5 users,  load average: 4,19, 4,23, 3,31
frequency(45)=1200000000
temp=80.1'C
 09:31:13 up 12:51,  5 users,  load average: 4,16, 4,22, 3,32
frequency(45)=1200002000
temp=80.1'C
 09:31:23 up 12:51,  5 users,  load average: 4,14, 4,21, 3,33
frequency(45)=1200000000
temp=79.5'C
 09:31:33 up 12:51,  5 users,  load average: 4,12, 4,21, 3,33
frequency(45)=1200000000
temp=79.5'C
 09:31:43 up 12:51,  5 users,  load average: 4,10, 4,20, 3,34
frequency(45)=1200002000
temp=79.5'C
 09:31:53 up 12:51,  5 users,  load average: 4,24, 4,23, 3,36
frequency(45)=1200000000
temp=78.4'C
 09:32:03 up 12:52,  5 users,  load average: 4,35, 4,25, 3,38
frequency(45)=1200000000
temp=79.0'C
 09:32:13 up 12:52,  5 users,  load average: 4,29, 4,24, 3,38
frequency(45)=1200000000
temp=79.0'C
 09:32:24 up 12:52,  5 users,  load average: 4,33, 4,25, 3,39
frequency(45)=1200000000
temp=78.4'C
 09:32:34 up 12:52,  5 users,  load average: 4,28, 4,24, 3,40
frequency(45)=1200000000
temp=79.0'C
 09:32:44 up 12:52,  5 users,  load average: 4,24, 4,24, 3,41
frequency(45)=1200000000
temp=78.4'C
 09:32:54 up 12:52,  5 users,  load average: 4,20, 4,23, 3,41
frequency(45)=1200000000
temp=79.5'C
 09:33:04 up 12:53,  5 users,  load average: 4,25, 4,24, 3,43
frequency(45)=1200000000
temp=79.0'C
 09:33:14 up 12:53,  5 users,  load average: 4,28, 4,25, 3,44
frequency(45)=1200000000
temp=78.4'C
 09:33:24 up 12:53,  5 users,  load average: 4,24, 4,24, 3,44
frequency(45)=1200000000
temp=79.0'C
 09:33:34 up 12:53,  5 users,  load average: 4,20, 4,23, 3,45
frequency(45)=1199998000
temp=78.4'C
 09:33:44 up 12:53,  5 users,  load average: 4,17, 4,22, 3,45
frequency(45)=1200000000
temp=78.4'C
 09:33:54 up 12:53,  5 users,  load average: 4,22, 4,23, 3,47
frequency(45)=1200000000
temp=79.0'C
 09:34:04 up 12:54,  5 users,  load average: 4,19, 4,22, 3,47
frequency(45)=1200000000
temp=78.4'C
 09:34:14 up 12:54,  5 users,  load average: 4,30, 4,25, 3,49
frequency(45)=1199998000
temp=77.9'C
 09:34:24 up 12:54,  5 users,  load average: 4,26, 4,24, 3,49
frequency(45)=1200000000
temp=78.4'C
 09:34:34 up 12:54,  5 users,  load average: 4,22, 4,23, 3,50
frequency(45)=1200000000
temp=77.9'C
 09:34:44 up 12:54,  5 users,  load average: 4,18, 4,22, 3,51
frequency(45)=1200000000
temp=78.4'C
 09:34:54 up 12:54,  5 users,  load average: 4,16, 4,22, 3,51
frequency(45)=1200000000
temp=77.9'C
 09:35:04 up 12:55,  5 users,  load average: 4,13, 4,21, 3,52
frequency(45)=1200000000
temp=78.4'C
 09:35:14 up 12:55,  5 users,  load average: 4,19, 4,22, 3,53
frequency(45)=1200000000
temp=77.9'C
 09:35:24 up 12:55,  5 users,  load average: 4,32, 4,25, 3,54
frequency(45)=1200000000
temp=77.9'C
 09:35:34 up 12:55,  5 users,  load average: 4,27, 4,24, 3,55
frequency(45)=1200000000
temp=77.9'C
 09:35:44 up 12:55,  5 users,  load average: 4,30, 4,25, 3,56
frequency(45)=1200000000
temp=77.9'C
 09:35:54 up 12:55,  5 users,  load average: 4,25, 4,24, 3,56
frequency(45)=1200000000
temp=77.9'C
 09:36:04 up 12:56,  5 users,  load average: 4,21, 4,23, 3,57
frequency(45)=1200000000
temp=77.9'C
 09:36:14 up 12:56,  5 users,  load average: 4,26, 4,24, 3,58
frequency(45)=1200000000
temp=78.4'C
 09:36:24 up 12:56,  5 users,  load average: 4,30, 4,25, 3,59
frequency(45)=1200000000
temp=77.4'C
 09:36:34 up 12:56,  5 users,  load average: 4,25, 4,24, 3,59
frequency(45)=1200000000
temp=77.9'C
 09:36:44 up 12:56,  5 users,  load average: 4,21, 4,23, 3,60
frequency(45)=1200000000
temp=77.9'C
 09:36:54 up 12:56,  5 users,  load average: 4,26, 4,24, 3,60
frequency(45)=1200000000
temp=78.4'C
 09:37:04 up 12:57,  5 users,  load average: 4,29, 4,25, 3,61
frequency(45)=1200000000
temp=77.9'C
 09:37:14 up 12:57,  5 users,  load average: 4,25, 4,24, 3,62
frequency(45)=1200000000
temp=77.9'C
 09:37:24 up 12:57,  5 users,  load average: 4,21, 4,23, 3,62
frequency(45)=1200000000
temp=77.9'C
 09:37:34 up 12:57,  5 users,  load average: 4,18, 4,23, 3,63
frequency(45)=1200000000
temp=77.4'C
 09:37:44 up 12:57,  5 users,  load average: 4,15, 4,22, 3,63
frequency(45)=1199998000
temp=78.4'C
 09:37:54 up 12:57,  5 users,  load average: 4,13, 4,21, 3,63
frequency(45)=1200000000
temp=77.4'C
 09:38:04 up 12:58,  5 users,  load average: 4,19, 4,22, 3,64
frequency(45)=1200000000
temp=77.4'C
 09:38:14 up 12:58,  5 users,  load average: 4,16, 4,21, 3,65
frequency(45)=1200000000
temp=77.4'C
 09:38:24 up 12:58,  5 users,  load average: 4,13, 4,21, 3,65
frequency(45)=1200000000
temp=77.9'C
 09:38:34 up 12:58,  5 users,  load average: 4,11, 4,20, 3,65
frequency(45)=1200000000
temp=77.4'C
 09:38:44 up 12:58,  5 users,  load average: 4,25, 4,23, 3,67
frequency(45)=1199998000
temp=77.9'C
 09:38:54 up 12:58,  5 users,  load average: 4,21, 4,22, 3,67
frequency(45)=1200000000
temp=77.9'C
 09:39:04 up 12:59,  5 users,  load average: 4,18, 4,21, 3,68
frequency(45)=1200000000
temp=77.4'C
 09:39:14 up 12:59,  5 users,  load average: 4,15, 4,20, 3,68
frequency(45)=1200000000
temp=77.9'C
 09:39:24 up 12:59,  5 users,  load average: 4,21, 4,21, 3,69
frequency(45)=1200000000
temp=77.9'C
 09:39:34 up 12:59,  5 users,  load average: 4,18, 4,21, 3,69
frequency(45)=1200000000
temp=77.9'C
 09:39:44 up 12:59,  5 users,  load average: 4,15, 4,20, 3,70
frequency(45)=1200000000
temp=78.4'C
 09:39:54 up 12:59,  5 users,  load average: 4,13, 4,19, 3,70
frequency(45)=1200000000
temp=78.4'C
 09:40:04 up 13:00,  5 users,  load average: 4,11, 4,19, 3,70
frequency(45)=1200000000
temp=78.4'C
 09:40:14 up 13:00,  5 users,  load average: 4,09, 4,18, 3,70
frequency(45)=1200000000
temp=78.4'C
 09:40:24 up 13:00,  5 users,  load average: 4,08, 4,18, 3,71
frequency(45)=1200000000
temp=78.4'C
 09:40:35 up 13:00,  5 users,  load average: 4,14, 4,19, 3,72
frequency(45)=1200000000
temp=78.4'C
 09:40:45 up 13:00,  5 users,  load average: 4,20, 4,20, 3,72
frequency(45)=1200000000
temp=78.4'C
 09:40:55 up 13:00,  5 users,  load average: 4,32, 4,22, 3,74
frequency(45)=1200000000
temp=78.4'C
 09:41:05 up 13:01,  5 users,  load average: 4,27, 4,22, 3,74
frequency(45)=1200000000
temp=79.0'C
 09:41:15 up 13:01,  5 users,  load average: 4,23, 4,21, 3,74
frequency(45)=1200000000
temp=78.4'C
 09:41:25 up 13:01,  5 users,  load average: 4,20, 4,20, 3,75
frequency(45)=1200000000
temp=79.0'C
 09:41:35 up 13:01,  5 users,  load average: 4,17, 4,20, 3,75
frequency(45)=1200000000
temp=78.4'C
 09:41:45 up 13:01,  5 users,  load average: 4,22, 4,21, 3,76
frequency(45)=1200000000
temp=77.9'C
 09:41:55 up 13:01,  5 users,  load average: 4,19, 4,20, 3,76
frequency(45)=1200000000
temp=77.9'C
 09:42:05 up 13:02,  5 users,  load average: 4,16, 4,19, 3,76
frequency(45)=1200002000
temp=78.4'C
 09:42:15 up 13:02,  5 users,  load average: 4,13, 4,19, 3,77
frequency(45)=1200000000
temp=78.4'C
 09:42:25 up 13:02,  5 users,  load average: 4,19, 4,20, 3,77
frequency(45)=1200000000
temp=78.4'C
 09:42:35 up 13:02,  5 users,  load average: 4,24, 4,21, 3,78
frequency(45)=1200000000
temp=78.4'C
 09:42:45 up 13:02,  5 users,  load average: 4,28, 4,22, 3,79
frequency(45)=1200000000
temp=77.9'C
 09:42:55 up 13:02,  5 users,  load average: 4,39, 4,24, 3,80
frequency(45)=1200000000
temp=78.4'C
 09:43:05 up 13:03,  5 users,  load average: 4,48, 4,27, 3,81
frequency(45)=1200000000
temp=78.4'C
 09:43:15 up 13:03,  5 users,  load average: 4,41, 4,26, 3,82
frequency(45)=1200000000
temp=78.4'C
 09:43:25 up 13:03,  5 users,  load average: 4,34, 4,25, 3,82
frequency(45)=1200000000
temp=78.4'C
 09:43:35 up 13:03,  5 users,  load average: 4,29, 4,24, 3,82
frequency(45)=1200000000
temp=78.4'C
 09:43:45 up 13:03,  5 users,  load average: 4,25, 4,23, 3,82
frequency(45)=1200000000
temp=78.4'C
 09:43:55 up 13:03,  5 users,  load average: 4,44, 4,28, 3,84
frequency(45)=1200000000
temp=77.9'C
 09:44:05 up 13:04,  5 users,  load average: 4,37, 4,27, 3,84
frequency(45)=1200000000
temp=77.9'C
 09:44:15 up 13:04,  5 users,  load average: 4,32, 4,26, 3,84
frequency(45)=1200000000
temp=78.4'C
 09:44:25 up 13:04,  5 users,  load average: 4,35, 4,27, 3,85
frequency(45)=1200000000
temp=78.4'C
 09:44:35 up 13:04,  5 users,  load average: 4,37, 4,27, 3,86
frequency(45)=1200000000
temp=77.9'C
 09:44:45 up 13:04,  5 users,  load average: 4,40, 4,28, 3,87
frequency(45)=1200002000
temp=78.4'C
 09:44:55 up 13:04,  5 users,  load average: 4,48, 4,30, 3,88
frequency(45)=1200000000
temp=77.9'C
 09:45:05 up 13:05,  5 users,  load average: 4,41, 4,29, 3,88
frequency(45)=1200000000
temp=78.4'C
 09:45:15 up 13:05,  5 users,  load average: 4,35, 4,28, 3,88
frequency(45)=1200000000
temp=78.4'C
 09:45:25 up 13:05,  5 users,  load average: 4,29, 4,27, 3,88
frequency(45)=1200000000
temp=78.4'C
 09:45:35 up 13:05,  5 users,  load average: 4,25, 4,27, 3,88
frequency(45)=1200000000
temp=78.4'C
 09:45:45 up 13:05,  5 users,  load average: 4,21, 4,26, 3,88
frequency(45)=1200000000
temp=77.9'C
 09:45:55 up 13:05,  5 users,  load average: 4,26, 4,27, 3,89
frequency(45)=1200000000
temp=78.4'C
 09:46:05 up 13:06,  5 users,  load average: 4,37, 4,29, 3,90
frequency(45)=1200000000
temp=77.4'C
 09:46:15 up 13:06,  5 users,  load average: 4,31, 4,28, 3,90
frequency(45)=1200000000
temp=78.4'C
 09:46:25 up 13:06,  5 users,  load average: 4,27, 4,27, 3,90
frequency(45)=1200000000
temp=78.4'C
 09:46:35 up 13:06,  5 users,  load average: 4,23, 4,26, 3,90
frequency(45)=1200002000
temp=78.4'C
 09:46:45 up 13:06,  5 users,  load average: 4,19, 4,25, 3,90
frequency(45)=1200000000
temp=78.4'C
 09:46:55 up 13:06,  5 users,  load average: 4,32, 4,28, 3,92
frequency(45)=1200002000
temp=79.0'C
 09:47:05 up 13:07,  5 users,  load average: 4,27, 4,27, 3,92
frequency(45)=1200000000
temp=78.4'C
 09:47:15 up 13:07,  5 users,  load average: 4,23, 4,26, 3,92
frequency(45)=1200000000
temp=78.4'C
 09:47:25 up 13:07,  5 users,  load average: 4,19, 4,25, 3,92
frequency(45)=1200000000
temp=78.4'C
 09:47:35 up 13:07,  5 users,  load average: 4,24, 4,26, 3,93
frequency(45)=1200000000
temp=78.4'C
 09:47:45 up 13:07,  5 users,  load average: 4,20, 4,25, 3,93
frequency(45)=1200000000
temp=77.9'C
 09:47:55 up 13:07,  5 users,  load average: 4,17, 4,24, 3,93
frequency(45)=1200002000
temp=78.4'C
 09:48:05 up 13:08,  5 users,  load average: 4,15, 4,23, 3,93
frequency(45)=1200000000
temp=77.9'C
 09:48:15 up 13:08,  5 users,  load average: 4,12, 4,23, 3,93
frequency(45)=1200000000
temp=78.4'C
 09:48:25 up 13:08,  5 users,  load average: 4,10, 4,22, 3,93
frequency(45)=1200002000
temp=78.4'C
 09:48:35 up 13:08,  5 users,  load average: 4,24, 4,24, 3,94
frequency(45)=1200000000
temp=78.4'C
 09:48:45 up 13:08,  5 users,  load average: 4,36, 4,27, 3,95
frequency(45)=1200000000
temp=77.9'C
 09:48:55 up 13:08,  5 users,  load average: 4,30, 4,26, 3,95
frequency(45)=1200000000
temp=77.9'C
 09:49:05 up 13:09,  5 users,  load average: 4,34, 4,27, 3,96
frequency(45)=1200000000
temp=78.4'C
 09:49:16 up 13:09,  5 users,  load average: 4,29, 4,26, 3,96
frequency(45)=1200000000
temp=77.9'C
 09:49:26 up 13:09,  5 users,  load average: 4,24, 4,25, 3,96
frequency(45)=1200000000
temp=77.9'C
 09:49:36 up 13:09,  5 users,  load average: 4,20, 4,24, 3,96
frequency(45)=1200000000
temp=77.9'C
 09:49:46 up 13:09,  5 users,  load average: 4,25, 4,25, 3,97
frequency(45)=1200000000
temp=77.9'C
 09:49:56 up 13:09,  5 users,  load average: 4,21, 4,24, 3,97
frequency(45)=1200000000
temp=77.4'C
 09:50:06 up 13:10,  5 users,  load average: 4,18, 4,24, 3,97
frequency(45)=1200000000
temp=77.9'C
 09:50:16 up 13:10,  5 users,  load average: 4,15, 4,23, 3,97
frequency(45)=1200000000
temp=77.4'C
 09:50:26 up 13:10,  5 users,  load average: 4,13, 4,22, 3,97
frequency(45)=1200000000
temp=78.4'C
 09:50:36 up 13:10,  5 users,  load average: 4,26, 4,25, 3,98
frequency(45)=1200000000
temp=78.4'C
 09:50:46 up 13:10,  5 users,  load average: 4,30, 4,25, 3,98
frequency(45)=1200002000
temp=78.4'C
 09:50:56 up 13:10,  5 users,  load average: 4,25, 4,25, 3,98
frequency(45)=1200000000
temp=77.4'C
 09:51:06 up 13:11,  5 users,  load average: 4,21, 4,24, 3,98
frequency(45)=1200002000
temp=77.4'C
 09:51:16 up 13:11,  5 users,  load average: 4,18, 4,23, 3,98
frequency(45)=1200000000
temp=77.4'C
 09:51:26 up 13:11,  5 users,  load average: 4,15, 4,22, 3,98
frequency(45)=1200002000
temp=77.4'C
 09:51:36 up 13:11,  5 users,  load average: 4,13, 4,21, 3,98
frequency(45)=1200000000
temp=77.4'C
 09:51:46 up 13:11,  5 users,  load average: 4,11, 4,21, 3,98
frequency(45)=1200000000
temp=77.9'C
 09:51:56 up 13:11,  5 users,  load average: 4,17, 4,22, 3,99
frequency(45)=1200000000
temp=77.9'C
 09:52:06 up 13:12,  5 users,  load average: 4,14, 4,21, 3,99
frequency(45)=1200000000
temp=77.9'C
 09:52:16 up 13:12,  5 users,  load average: 4,12, 4,20, 3,99
frequency(45)=1200000000
temp=77.4'C
 09:52:26 up 13:12,  5 users,  load average: 4,10, 4,20, 3,99
frequency(45)=1200000000
temp=77.9'C
 09:52:36 up 13:12,  5 users,  load average: 4,09, 4,19, 3,99
frequency(45)=1200000000
temp=77.4'C
 09:52:46 up 13:12,  5 users,  load average: 4,07, 4,18, 3,99
frequency(45)=1200000000
temp=77.4'C
 09:52:56 up 13:12,  5 users,  load average: 4,14, 4,19, 3,99
frequency(45)=1200000000
temp=77.4'C
 09:53:06 up 13:13,  5 users,  load average: 4,27, 4,22, 4,00
frequency(45)=1200000000
temp=77.9'C
 09:53:16 up 13:13,  5 users,  load average: 4,39, 4,25, 4,01
frequency(45)=1200002000
temp=77.4'C
 09:53:26 up 13:13,  5 users,  load average: 4,33, 4,24, 4,01
frequency(45)=1200000000
temp=77.9'C
 09:53:36 up 13:13,  5 users,  load average: 4,28, 4,23, 4,01
frequency(45)=1200000000
temp=77.4'C
 09:53:46 up 13:13,  5 users,  load average: 4,31, 4,24, 4,02
frequency(45)=1200000000
temp=77.4'C
 09:53:56 up 13:13,  5 users,  load average: 4,33, 4,25, 4,02
frequency(45)=1200002000
temp=77.4'C
 09:54:06 up 13:14,  5 users,  load average: 4,36, 4,26, 4,03
frequency(45)=1200000000
temp=77.4'C
 09:54:16 up 13:14,  5 users,  load average: 4,46, 4,28, 4,04
frequency(45)=1200000000
temp=77.9'C
 09:54:26 up 13:14,  5 users,  load average: 4,39, 4,27, 4,04
frequency(45)=1200000000
temp=78.4'C
 09:54:36 up 13:14,  5 users,  load average: 4,33, 4,26, 4,04
frequency(45)=1200000000
temp=77.9'C
 09:54:46 up 13:14,  5 users,  load average: 4,28, 4,25, 4,04
frequency(45)=1200000000
temp=79.0'C
 09:54:56 up 13:14,  5 users,  load average: 4,24, 4,25, 4,04
frequency(45)=1200000000
temp=79.0'C
 09:55:06 up 13:15,  5 users,  load average: 4,20, 4,24, 4,04
frequency(45)=1200000000
temp=79.0'C
 09:55:16 up 13:15,  5 users,  load average: 4,17, 4,23, 4,04
frequency(45)=1200000000
temp=78.4'C
 09:55:26 up 13:15,  5 users,  load average: 4,14, 4,22, 4,04
frequency(45)=1200000000
temp=79.0'C
 09:55:36 up 13:15,  5 users,  load average: 4,12, 4,22, 4,04
frequency(45)=1200000000
temp=78.4'C
 09:55:46 up 13:15,  5 users,  load average: 4,10, 4,21, 4,04
frequency(45)=1200000000
temp=77.9'C
 09:55:56 up 13:15,  5 users,  load average: 4,09, 4,20, 4,04
frequency(45)=1200000000
temp=78.4'C
 09:56:06 up 13:16,  5 users,  load average: 4,23, 4,23, 4,05
frequency(45)=1200000000
temp=78.4'C
 09:56:16 up 13:16,  5 users,  load average: 4,19, 4,22, 4,05
frequency(45)=1200000000
temp=77.9'C
 09:56:26 up 13:16,  5 users,  load average: 4,16, 4,21, 4,05
frequency(45)=1200000000
temp=78.4'C
 09:56:36 up 13:16,  5 users,  load average: 4,14, 4,21, 4,05
frequency(45)=1200002000
temp=78.4'C
 09:56:46 up 13:16,  5 users,  load average: 4,12, 4,20, 4,05
frequency(45)=1200000000
temp=78.4'C
 09:56:56 up 13:16,  5 users,  load average: 4,10, 4,19, 4,05
frequency(45)=1200002000
temp=78.4'C
 09:57:06 up 13:17,  5 users,  load average: 4,08, 4,19, 4,05
frequency(45)=1200000000
temp=78.4'C
 09:57:17 up 13:17,  5 users,  load average: 4,22, 4,21, 4,06
frequency(45)=1200000000
temp=78.4'C
 09:57:27 up 13:17,  5 users,  load average: 4,42, 4,26, 4,07
frequency(45)=1200000000
temp=79.0'C
 09:57:37 up 13:17,  5 users,  load average: 4,51, 4,28, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:57:47 up 13:17,  5 users,  load average: 4,43, 4,27, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:57:57 up 13:17,  5 users,  load average: 4,37, 4,26, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:58:07 up 13:18,  5 users,  load average: 4,31, 4,25, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:58:17 up 13:18,  5 users,  load average: 4,26, 4,25, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:58:27 up 13:18,  5 users,  load average: 4,22, 4,24, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:58:37 up 13:18,  5 users,  load average: 4,19, 4,23, 4,07
frequency(45)=1200000000
temp=78.4'C
 09:58:47 up 13:18,  5 users,  load average: 4,16, 4,22, 4,07
frequency(45)=1200000000
temp=78.4'C
 09:58:57 up 13:18,  5 users,  load average: 4,21, 4,23, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:59:07 up 13:19,  5 users,  load average: 4,34, 4,26, 4,09
frequency(45)=1200000000
temp=77.9'C
 09:59:17 up 13:19,  5 users,  load average: 4,28, 4,25, 4,09
frequency(45)=1200000000
temp=77.9'C
 09:59:27 up 13:19,  5 users,  load average: 4,24, 4,24, 4,09
frequency(45)=1200000000
temp=78.4'C
 09:59:37 up 13:19,  5 users,  load average: 4,20, 4,23, 4,08
frequency(45)=1200000000
temp=77.9'C
 09:59:47 up 13:19,  5 users,  load average: 4,17, 4,22, 4,08
frequency(45)=1200000000
temp=78.4'C
 09:59:57 up 13:19,  5 users,  load average: 4,23, 4,23, 4,09
frequency(45)=1200000000
temp=78.4'C
 10:00:07 up 13:20,  5 users,  load average: 4,34, 4,26, 4,10
frequency(45)=1200000000
temp=78.4'C
 10:00:17 up 13:20,  5 users,  load average: 4,29, 4,25, 4,10
frequency(45)=1200000000
temp=78.4'C
 10:00:27 up 13:20,  5 users,  load average: 4,25, 4,24, 4,10
frequency(45)=1200002000
temp=77.9'C
 10:00:37 up 13:20,  5 users,  load average: 4,21, 4,23, 4,10
frequency(45)=1200000000
temp=77.9'C
 10:00:47 up 13:20,  5 users,  load average: 4,18, 4,23, 4,09
frequency(45)=1200000000
temp=78.4'C
 10:00:57 up 13:20,  5 users,  load average: 4,46, 4,28, 4,11
frequency(45)=1200000000
temp=78.4'C
 10:01:07 up 13:21,  5 users,  load average: 4,39, 4,27, 4,11
frequency(45)=1200000000
temp=78.4'C
 10:01:17 up 13:21,  5 users,  load average: 4,33, 4,27, 4,11
frequency(45)=1200000000
temp=78.4'C
 10:01:27 up 13:21,  5 users,  load average: 4,28, 4,26, 4,11
frequency(45)=1200000000
temp=78.4'C
 10:01:37 up 13:21,  5 users,  load average: 4,23, 4,25, 4,11
frequency(45)=1200000000
temp=77.9'C
 10:01:47 up 13:21,  5 users,  load average: 4,20, 4,24, 4,11
frequency(45)=1200000000
temp=77.9'C
 10:01:57 up 13:21,  5 users,  load average: 4,32, 4,27, 4,12
frequency(45)=1200000000
temp=77.9'C
 10:02:07 up 13:22,  5 users,  load average: 4,43, 4,29, 4,13
frequency(45)=1200000000
temp=78.4'C
 10:02:17 up 13:22,  5 users,  load average: 4,51, 4,31, 4,14
frequency(45)=1200000000
temp=77.9'C
 10:02:27 up 13:22,  5 users,  load average: 4,60, 4,34, 4,15
frequency(45)=1200000000
temp=77.9'C
 10:02:37 up 13:22,  5 users,  load average: 4,58, 4,34, 4,15
frequency(45)=1200002000
temp=77.9'C
 10:02:47 up 13:22,  5 users,  load average: 4,49, 4,33, 4,15
frequency(45)=1200000000
temp=77.4'C
 10:02:57 up 13:22,  5 users,  load average: 4,41, 4,32, 4,15
frequency(45)=1200000000
temp=77.4'C
 10:03:07 up 13:23,  5 users,  load average: 4,35, 4,31, 4,15
frequency(45)=1200000000
temp=77.9'C
 10:03:17 up 13:23,  5 users,  load average: 4,45, 4,33, 4,15
frequency(45)=1200000000
temp=78.4'C
 10:03:27 up 13:23,  5 users,  load average: 4,53, 4,35, 4,16
frequency(45)=1200000000
temp=77.9'C
 10:03:37 up 13:23,  5 users,  load average: 4,61, 4,37, 4,17
frequency(45)=1200000000
temp=77.9'C
 10:03:47 up 13:23,  5 users,  load average: 4,51, 4,36, 4,17
frequency(45)=1200000000
temp=77.9'C
 10:03:57 up 13:24,  5 users,  load average: 4,43, 4,35, 4,17
frequency(45)=1200000000
temp=77.9'C
 10:04:07 up 13:24,  5 users,  load average: 4,37, 4,34, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:04:17 up 13:24,  5 users,  load average: 4,31, 4,33, 4,16
frequency(45)=1200000000
temp=78.4'C
 10:04:27 up 13:24,  5 users,  load average: 4,26, 4,32, 4,16
frequency(45)=1200000000
temp=77.4'C
 10:04:37 up 13:24,  5 users,  load average: 4,22, 4,31, 4,16
frequency(45)=1200000000
temp=77.9'C
 10:04:47 up 13:24,  5 users,  load average: 4,19, 4,30, 4,16
frequency(45)=1200000000
temp=78.4'C
 10:04:57 up 13:25,  5 users,  load average: 4,31, 4,32, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:05:08 up 13:25,  5 users,  load average: 4,34, 4,33, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:05:18 up 13:25,  5 users,  load average: 4,29, 4,31, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:05:28 up 13:25,  5 users,  load average: 4,24, 4,30, 4,17
frequency(45)=1200000000
temp=77.9'C
 10:05:38 up 13:25,  5 users,  load average: 4,20, 4,29, 4,16
frequency(45)=1200000000
temp=78.4'C
 10:05:48 up 13:25,  5 users,  load average: 4,25, 4,30, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:05:58 up 13:26,  5 users,  load average: 4,29, 4,31, 4,17
frequency(45)=1200000000
temp=77.9'C
 10:06:08 up 13:26,  5 users,  load average: 4,25, 4,30, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:06:18 up 13:26,  5 users,  load average: 4,21, 4,29, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:06:28 up 13:26,  5 users,  load average: 4,18, 4,28, 4,17
frequency(45)=1200002000
temp=78.4'C
 10:06:38 up 13:26,  5 users,  load average: 4,15, 4,27, 4,16
frequency(45)=1200000000
temp=79.0'C
 10:06:48 up 13:26,  5 users,  load average: 4,13, 4,26, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:06:58 up 13:27,  5 users,  load average: 4,11, 4,25, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:07:08 up 13:27,  5 users,  load average: 4,09, 4,24, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:07:18 up 13:27,  5 users,  load average: 4,08, 4,24, 4,16
frequency(45)=1200000000
temp=79.0'C
 10:07:28 up 13:27,  5 users,  load average: 4,06, 4,23, 4,15
frequency(45)=1200000000
temp=79.5'C
 10:07:38 up 13:27,  5 users,  load average: 4,21, 4,25, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:07:48 up 13:27,  5 users,  load average: 4,33, 4,28, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:07:58 up 13:28,  5 users,  load average: 4,43, 4,30, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:08:08 up 13:28,  5 users,  load average: 4,37, 4,29, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:08:18 up 13:28,  5 users,  load average: 4,31, 4,28, 4,18
frequency(45)=1200000000
temp=80.1'C
 10:08:28 up 13:28,  5 users,  load average: 4,26, 4,27, 4,17
frequency(45)=1200000000
temp=80.1'C
 10:08:38 up 13:28,  5 users,  load average: 4,22, 4,26, 4,17
frequency(45)=1199998000
temp=79.5'C
 10:08:48 up 13:28,  5 users,  load average: 4,19, 4,26, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:08:58 up 13:29,  5 users,  load average: 4,16, 4,25, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:09:08 up 13:29,  5 users,  load average: 4,13, 4,24, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:09:18 up 13:29,  5 users,  load average: 4,27, 4,26, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:09:28 up 13:29,  5 users,  load average: 4,30, 4,27, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:09:38 up 13:29,  5 users,  load average: 4,25, 4,26, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:09:48 up 13:29,  5 users,  load average: 4,22, 4,25, 4,17
frequency(45)=1199998000
temp=79.5'C
 10:09:58 up 13:30,  5 users,  load average: 4,18, 4,25, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:10:08 up 13:30,  5 users,  load average: 4,15, 4,24, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:10:18 up 13:30,  5 users,  load average: 4,13, 4,23, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:10:28 up 13:30,  5 users,  load average: 4,11, 4,22, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:10:38 up 13:30,  5 users,  load average: 4,25, 4,25, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:10:48 up 13:30,  5 users,  load average: 4,36, 4,27, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:10:58 up 13:31,  5 users,  load average: 4,31, 4,26, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:11:08 up 13:31,  5 users,  load average: 4,26, 4,26, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:11:18 up 13:31,  5 users,  load average: 4,22, 4,25, 4,18
frequency(45)=1200000000
temp=78.4'C
 10:11:28 up 13:31,  5 users,  load average: 4,19, 4,24, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:11:38 up 13:31,  5 users,  load average: 4,16, 4,23, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:11:48 up 13:31,  5 users,  load average: 4,29, 4,26, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:11:58 up 13:32,  5 users,  load average: 4,24, 4,25, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:12:08 up 13:32,  5 users,  load average: 4,29, 4,26, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:12:18 up 13:32,  5 users,  load average: 4,24, 4,25, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:12:28 up 13:32,  5 users,  load average: 4,20, 4,24, 4,18
frequency(45)=1200000000
temp=78.4'C
 10:12:38 up 13:32,  5 users,  load average: 4,17, 4,23, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:12:48 up 13:32,  5 users,  load average: 4,15, 4,22, 4,18
frequency(45)=1200000000
temp=78.4'C
 10:12:58 up 13:33,  5 users,  load average: 4,12, 4,22, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:13:08 up 13:33,  5 users,  load average: 4,18, 4,23, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:13:18 up 13:33,  5 users,  load average: 4,15, 4,22, 4,18
frequency(45)=1200000000
temp=79.5'C
 10:13:28 up 13:33,  5 users,  load average: 4,13, 4,21, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:13:39 up 13:33,  5 users,  load average: 4,11, 4,20, 4,17
frequency(45)=1200002000
temp=79.0'C
 10:13:49 up 13:33,  5 users,  load average: 4,09, 4,20, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:13:59 up 13:34,  5 users,  load average: 4,08, 4,19, 4,17
frequency(45)=1200002000
temp=79.5'C
 10:14:09 up 13:34,  5 users,  load average: 4,15, 4,20, 4,17
frequency(45)=1200000000
temp=79.5'C
 10:14:19 up 13:34,  5 users,  load average: 4,12, 4,19, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:14:29 up 13:34,  5 users,  load average: 4,10, 4,19, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:14:39 up 13:34,  5 users,  load average: 4,16, 4,20, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:14:49 up 13:34,  5 users,  load average: 4,14, 4,19, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:14:59 up 13:35,  5 users,  load average: 4,20, 4,20, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:15:09 up 13:35,  5 users,  load average: 4,24, 4,21, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:15:19 up 13:35,  5 users,  load average: 4,20, 4,20, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:15:29 up 13:35,  5 users,  load average: 4,17, 4,20, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:15:39 up 13:35,  5 users,  load average: 4,22, 4,21, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:15:49 up 13:35,  5 users,  load average: 4,27, 4,22, 4,18
frequency(45)=1200000000
temp=79.0'C
 10:15:59 up 13:36,  5 users,  load average: 4,23, 4,21, 4,18
frequency(45)=1200000000
temp=78.4'C
 10:16:09 up 13:36,  5 users,  load average: 4,19, 4,20, 4,18
frequency(45)=1200000000
temp=78.4'C
 10:16:19 up 13:36,  5 users,  load average: 4,16, 4,20, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:16:29 up 13:36,  5 users,  load average: 4,14, 4,19, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:16:39 up 13:36,  5 users,  load average: 4,12, 4,18, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:16:49 up 13:36,  5 users,  load average: 4,10, 4,18, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:16:59 up 13:37,  5 users,  load average: 4,08, 4,17, 4,17
frequency(45)=1200000000
temp=78.4'C
 10:17:09 up 13:37,  5 users,  load average: 4,07, 4,17, 4,16
frequency(45)=1200000000
temp=78.4'C
 10:17:19 up 13:37,  5 users,  load average: 4,06, 4,16, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:17:29 up 13:37,  5 users,  load average: 4,13, 4,17, 4,17
frequency(45)=1200000000
temp=79.0'C
 10:17:39 up 13:37,  5 users,  load average: 4,11, 4,17, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:17:49 up 13:37,  5 users,  load average: 4,09, 4,16, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:17:59 up 13:38,  5 users,  load average: 4,08, 4,16, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:18:09 up 13:38,  5 users,  load average: 4,14, 4,17, 4,16
frequency(45)=1200000000
temp=79.5'C
 10:18:19 up 13:38,  5 users,  load average: 4,12, 4,16, 4,16
frequency(45)=1200000000
temp=79.5'C
Attachments
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User avatar
Rive
Posts: 586
Joined: Sat Mar 26, 2016 5:21 pm
Location: USA

Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 4:35 pm

...this morning it came true: my Elephant Pi ran cpuburn-a53 for over 1 hour, only PASSIVELY (=no fan) cooled, with temperature between 77 and 79°C. No throtteling!..sysbench runs at 53°C for 1 hour.
Can it conquer cpuburn-a53 with a slight ARM overclock (1250)?

In any event, that is 17C higher than what a fan can cool the pi3 to. I dunno, but you would think less heat is better. 79C at stock is right on the precipice of throttling/overheating.

Elephant Pi, meet your new master Hot Rod Pi ;)

$5 12V fan...

(Linpack Passed N=8000 Gflops 6.6)
Image

Under the hood:
Image
Image


CPUburn-a53 61C/62C

Code: Select all

pi@raspberrypi:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& ./cpuburn-a53
[1] 1111
frequency(45)=600064000
temp=33.8'C
frequency(45)=1260000000
temp=52.6'C
frequency(45)=1260000000
temp=56.4'C
frequency(45)=1260000000
temp=58.0'C
frequency(45)=1260000000
temp=59.1'C
frequency(45)=1260000000
temp=60.7'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=62.8'C
frequency(45)=1260000000
temp=63.4'C
frequency(45)=1260000000
temp=63.4'C
frequency(45)=1260000000
temp=63.9'C
frequency(45)=1260000000
temp=64.5'C
frequency(45)=1260000000
temp=64.5'C
frequency(45)=1260000000
temp=65.0'C
frequency(45)=1260000000
temp=64.5'C
frequency(45)=1260000000
temp=64.5'C
frequency(45)=1260000000
temp=65.0'C
frequency(45)=1260000000
temp=65.0'C
frequency(45)=1260000000
temp=65.0'C
frequency(45)=1260000000
temp=62.8'C
frequency(45)=1260000000
temp=63.9'C
frequency(45)=1260000000
temp=63.4'C
frequency(45)=1260000000
temp=63.4'C
frequency(45)=1260000000
temp=63.4'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=63.4'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260002000
temp=62.3'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=60.7'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=59.1'C
frequency(45)=1260000000
temp=60.1'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1259998000
temp=62.3'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=60.7'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=60.7'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.2'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=61.8'C
frequency(45)=1260000000
temp=62.3'C
frequency(45)=1259998000
temp=62.3'C
frequency(45)=1260000000
temp=61.2'C
Sysbench 44C 114.1989s

Code: Select all

pi@raspberrypi:~ $ while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& sysbench --num-threads=4 --test=cpu --cpu-max-prime=20000 --validate run
[1] 6862
frequency(45)=1260000000
sysbench 0.4.12:  multi-threaded system evaluation benchmark

Running the test with following options:
Number of threads: 4
Additional request validation enabled.


Doing CPU performance benchmark

temp=32.2'C
Threads started!
frequency(45)=1260000000
temp=40.8'C
frequency(45)=1260000000
temp=41.9'C
frequency(45)=1260000000
temp=42.9'C
frequency(45)=1260000000
temp=42.9'C
frequency(45)=1260000000
temp=43.5'C
frequency(45)=1260000000
temp=44.5'C
frequency(45)=1260000000
temp=44.0'C
frequency(45)=1260000000
temp=44.0'C
frequency(45)=1259998000
temp=44.5'C
frequency(45)=1260000000
temp=44.5'C
frequency(45)=1260000000
temp=44.0'C
Done.

Maximum prime number checked in CPU test: 20000


Test execution summary:
    total time:                          114.1989s
    total number of events:              10000
    total time taken by event execution: 456.7233
    per-request statistics:
         min:                                 45.42ms
         avg:                                 45.67ms
         max:                                 69.47ms
         approx.  95 percentile:              46.02ms

Threads fairness:
    events (avg/stddev):           2500.0000/8.28
    execution time (avg/stddev):   114.1808/0.01
Last edited by Rive on Mon Apr 25, 2016 5:52 pm, edited 22 times in total.
DNPNWO

User avatar
scruss
Posts: 2547
Joined: Sat Jun 09, 2012 12:25 pm
Location: Toronto, ON
Contact: Website

Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 4:44 pm

Gerd wrote:The Pi3 needs cooling, that turned out very fast …
Really? Mine runs cooler than my oldest model B.
‘Remember the Golden Rule of Selling: “Do not resort to violence.”’ — McGlashan.

User avatar
Rive
Posts: 586
Joined: Sat Mar 26, 2016 5:21 pm
Location: USA

Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 5:19 pm

scruss wrote:
Gerd wrote:The Pi3 needs cooling, that turned out very fast …
Really? Mine runs cooler than my oldest model B.

Highly unlikely

test it and post results

Sysbench (System Benchmark with validated run)

Code: Select all

sudo apt-get install sysbench
while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& sysbench --num-threads=4 --test=cpu --cpu-max-prime=20000 --validate run
Stress (puts pi under near "real world" full CPU load) 15min timer
If you can't run this without exceeding 79C and throttling, Do NOT run cpuburn-a53 as you have insufficient cooling!

Code: Select all

sudo apt-get install stress
while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& stress -c 4 -t 900s
Cpuburn-a53 (cooling test- run for 15min) NEON

Code: Select all

wget https://raw.githubusercontent.com/ssvb/cpuburn-arm/master/cpuburn-a53.S
gcc -o cpuburn-a53 cpuburn-a53.S
while true; do vcgencmd measure_clock arm; vcgencmd measure_temp; sleep 10; done& ./cpuburn-a53

IF you can run cpuburn-a53 for 15min, without exceeding 79C (and throttling due to overheat), then your pi is adequately cooled.
DNPNWO

User avatar
Gerd
Posts: 66
Joined: Wed Mar 16, 2016 10:48 am
Location: Europe

Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 7:57 pm

Dear Rive,

first of all let me thank you for your great appreciation of my work. That I created something that lied beyond your imagination just 3 weeks ago. Let me quote from viewtopic.php?p=948462#p948462
A fan is a necessity to move the heat off the SoC.

Most will use their pi's in a protective case, so thermal testing a pi3 with no enclosure, skews the results as they will always be much lower with no enclosure (which is not how most pi3's will be used).

I'd like you see one of you with the pi3 stock @ 1200 MHz (or even overclocked at a higher arm freq ), without a case, no fan, and with just a heat sink show the temps and freq in a video while running the synthetic CPUBurn-a53 for a non-stop/continuous duration of 15 min without hitting 85°C.

I give you 5 min tops, before you hit the ceiling, slow to a crawl, and revert to 600MHz (Hell, you probably couldn't even manage to do it with 'Stress' (which is a lightweight contender compared to cpuburn)).

C'mon, show me how wrong I am. I am waiting.
Again, thank you for your appreciation that I did not only what you could not imagine, but this 4 times longer, over 1h.

OK, back to business.
So far I have showed that very good passive cooling is possible and reasonable even for high loads. Ever thought about what might happen if I add a fan? And then rethink that master thing. I do not like that kind of language and I am close to report your post.

Gerd

PS: Elephant Pi with fan: ambient: 19°C; sysbench 30°C; cpuburn 35°C; @stock freq., over_voltage=2

User avatar
Gerd
Posts: 66
Joined: Wed Mar 16, 2016 10:48 am
Location: Europe

Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 9:16 pm

scruss wrote:
Gerd wrote:The Pi3 needs cooling, that turned out very fast …
Really? Mine runs cooler than my oldest model B.
Congratulations and sorry, I should have written "My Pi3 needs cooling".

pxgator
Posts: 105
Joined: Mon Feb 16, 2015 6:45 pm
Location: Southern Colorado, USA

Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 9:32 pm

@ Gerd and Rive

No need for an endless debate and/or mud slinging.....you are both winners
as you have both proven that the RPi3 runs much better with proper cooling.
Case closed...?
So what's all this RPi stuff anyhow? Well folks, it's a feat of engineering from
the UK almost as remarkable as the De Havilland Mosquito and the Colossus.

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scruss
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Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 10:23 pm

Rive wrote:test it and post results
I didn't realize that you were trying to run round in tiny circles as fast as possible. Each to their own.

In day to day use, my Raspberry Pi 3 runs cooler than my 2012 model B. Both are cased. My uncased Intel Galileo idles at 65°C, and it keeps my tea warm.
‘Remember the Golden Rule of Selling: “Do not resort to violence.”’ — McGlashan.

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Rive
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Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 11:34 pm

Gerd wrote: I do not like that kind of language and I am close to report your post.
Report away, knock yourself out. ;)
DNPNWO

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liz
Raspberry Pi Foundation Employee & Forum Moderator
Raspberry Pi Foundation Employee & Forum Moderator
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Re: Meet Elephant Pi - the passive conqueror of cpuburn

Mon Apr 25, 2016 11:39 pm

Gerd and Rive - neither of you is behaving very well here. I'm closing this thread. Please reel it in. The next time either of you starts baiting another user (and yes, I know it takes two, but you're both being as bad as each other) it'll mean a short forum ban to cool down - at the very least.
Director of Communications, Raspberry Pi

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