System Stress Tests
All these tests were run for 30 minutes, exercising the CPU, graphics and data input/output and
included my environment and VMSTAT performance monitors, the, latter to validate the program
MBytes per second measurements and confirm that CPU utilisation was at the expected near 100% level. A script file was used to to ensure that the programs started in at the same time. In most cases, performance was measured or sampled every 60 seconds.
An example script file is below, also the commands to run the OpenGL program from a separate terminal, with VSYNC turned off to produce maximum frames per second (FPS). Of particular note, the first set of tests identifies increases in CPU temperature up to 91.7°C, with no fan running.
A questionable more significant problem, during the second set of tests, was the disk program indicating errors and the drive temporarily dropping off line during a test with the fan operational. The errors were the same as on earlier runs using a 3 amps power supply, the present PoE connection supposedly providing 4 amps.
Monitoring the input power used and that supplied for the USB drive, indicated that consumption was fairly constant between 2 and 15 minutes testing time, providing the following typical meter readings. These suggest that the disk drive might be more vulnerable to failure when the CPU is fully loaded and CPU MHz throttling might be useful if danger can be predicted. Light System Stress Test
The first sessions involved INTitHOT64g12, using 4 threads accessing 512 KB data, with a pass count to control minimum running time. Then, with this test, total running time was specified as 30 minutes, leading to fewer results when the CPU MHz was throttled. These MB/second results were allocated at two minute intervals. Other inclusions were burnindrive264g12 to a USB3 disk drive, plus videogl64C12 accessing the most demanding display test, producing FPS results every 30 seconds, with results provided at 60 second intervals, as shown in the detailed tables below.
Following are two sets of results for one run with the fan in use and one without the fan. On the bright side, these and a number of other tests, using the same parameters, ran without any issues. But CPU MHz throttling occurred in all cases.
Summaries
Minimum values are often isolated examples and can often be ignored. Best scores shown at the head of the table are from standalone runs. Maximum benchmark performance measurements suffer from being noted a minute after start time. Averages indicate significant reductions for the integer and OpenGL tests but little difference on disk drive data transfer speeds.
Of particular note is the CPU temperature measurement of 91.7°C with the fan out of use. Light Test With Fan
Note that CPU temperature is shown to be more than 84°C for most of the time. Heavy System Stress Test
This session comprised INTitHOT64g12, with 2 threads at 64 KB, MP-FPUStress64g12 with 2 threads at 512 KB, burnindrive264g12 to a PC via Ethernet, burnindrive264g12 to a USB 3 disk drive and videogl64C12 as before. Detailed important results are provided for fan and no fan scenarios, with two for the former as the first one failed. Note that, compared with 4 thread results, those for 2 threads can be slower than expected as the main data source can be from L2 cache instead of L1.
On running these tests the main issue was that the second test failed due to data comparison failures on reading. The first indication was a system warning that the disk drive was no longer available but it was remounted.
Following are examples of reported errors, similar to the earlier ones described earlier in Disk Drive Errors and Crashes. These were thought to have been caused by the inadequate 3 amps power supply. Also, see the comments in the initial System Stress Testing summary.
A summary of the three tests sessions follow. As indicated earlier, power consumption was higher during the tests run with the fan operational, which reduced temperatures, enabling faster performance. Without the fan, MHz throttling, involving higher temperatures,reduced current demands with slower performance. It seems that power consumption was more important than system temperature when considering stability. Heavy Test No Fan
At 100% CPU utilisation, the following measurements were similar to those during the No Fan Light System Test, with the CPU running at 1000 MHz for much of the time, temperatures around 90°C and that for the Power Management Integrated Circuit more than 78°C. Heavy Test With Fan - FAILED
As shown initially below, system behaviour did not appear to be much different to that, at the same point, during the later successful test. However, these are instantaneous measurements that can be different in the next picosecond. Also I did note USB power measurements of 4.8 volts at 0.53 amps, compared with 4.94 and 0.53 quoted earlier. But this might be due to infrequent manual sampling. Second Heavy Test With Fan
Here, performance did not vary much but there was some CPU MHz throttling. Perhaps the official fan will avoid this and overcome observed undesirable power variations with the new 5 amps version.
All these tests were run for 30 minutes, exercising the CPU, graphics and data input/output and
included my environment and VMSTAT performance monitors, the, latter to validate the program
MBytes per second measurements and confirm that CPU utilisation was at the expected near 100% level. A script file was used to to ensure that the programs started in at the same time. In most cases, performance was measured or sampled every 60 seconds.
An example script file is below, also the commands to run the OpenGL program from a separate terminal, with VSYNC turned off to produce maximum frames per second (FPS).
Code:
Script Filelxterminal -e ./RPiHeatMHzVolts64 Passes 31 Seconds 60 Log 7 &lxterminal -e ./INTitHOT64g12 threads 2, kBStress 64, Minutes 30, passCount 4000000, logNumber 7 &lxterminal -e ./MP-FPUStress64g12 threads 2, kb 512, ops 32, Minutes 30, log 7 &lxterminal -e sudo ./burnindrive264g12 Repeats 16, Minutes 27, Log 8, Seconds 1, F /media/raspberrypi/public/ray &lxterminal -e sudo ./burnindrive264g12 Repeats 16, Minutes 27, Log 9, Seconds 1, F /media/raspberrypi/EXT3 &lxterminal -e vmstat 60 30 . vmstat7.txtSeparate Terminalexport vblank_mode=0./videogl64C12 Test 6 Minutes 30 A questionable more significant problem, during the second set of tests, was the disk program indicating errors and the drive temporarily dropping off line during a test with the fan operational. The errors were the same as on earlier runs using a 3 amps power supply, the present PoE connection supposedly providing 4 amps.
Monitoring the input power used and that supplied for the USB drive, indicated that consumption was fairly constant between 2 and 15 minutes testing time, providing the following typical meter readings. These suggest that the disk drive might be more vulnerable to failure when the CPU is fully loaded and CPU MHz throttling might be useful if danger can be predicted.
Code:
No Fan Poor CPU Performance With Fan Good CPU Performance Power USB Power USB Volts Amps Volts Amps Volts Amps Volts Amps 5.26 1.75 5.06 0.53 5.20 2.60 4.94 0.53 The first sessions involved INTitHOT64g12, using 4 threads accessing 512 KB data, with a pass count to control minimum running time. Then, with this test, total running time was specified as 30 minutes, leading to fewer results when the CPU MHz was throttled. These MB/second results were allocated at two minute intervals. Other inclusions were burnindrive264g12 to a USB3 disk drive, plus videogl64C12 accessing the most demanding display test, producing FPS results every 30 seconds, with results provided at 60 second intervals, as shown in the detailed tables below.
Following are two sets of results for one run with the fan in use and one without the fan. On the bright side, these and a number of other tests, using the same parameters, ran without any issues. But CPU MHz throttling occurred in all cases.
Summaries
Minimum values are often isolated examples and can often be ignored. Best scores shown at the head of the table are from standalone runs. Maximum benchmark performance measurements suffer from being noted a minute after start time. Averages indicate significant reductions for the integer and OpenGL tests but little difference on disk drive data transfer speeds.
Of particular note is the CPU temperature measurement of 91.7°C with the fan out of use.
Code:
VMSTAT Integer Disk OpenGL MHz Volts CPU °C PMIC °C MB/sec KB/sec FPS Best 145000 63000 102 512 KB FAN Average 2128 0.8878 82.8 61.8 97568 60368 65.3 Min 1500 0.7200 42.2 39.7 95281 59159 61.0 Max 2400 0.9058 85.1 63.2 106457 61815 69.0 512 KB NO FAN Average 1174 0.7260 88.7 77.0 55898 56081 40.0 Min 1000 0.7200 56.0 53.7 45528 19941 33.0 Max 2400 0.9058 91.7 79.5 79094 58095 58.0 Average No Fan %Reduction 45 18 7 20 43 7 39 Note that CPU temperature is shown to be more than 84°C for most of the time.
Code:
512 KB FAN VMSTAT Integer Disk OpenGL Seconds MHz Volts CPU °C PMIC °C MB/sec KB/sec FPS 0 2400 0.9058 42.2 39.7 60 2146 0.9058 84.5 59.5 106457 61815 69 120 2146 0.9058 84.0 62.2 60132 68 181 2201 0.9058 84.5 62.1 61054 66 241 2366 0.9058 84.0 62.5 97930 60130 65 301 2201 0.9058 85.1 62.4 60235 67 362 2256 0.9058 84.0 62.8 60548 64 422 2146 0.9058 84.0 62.5 96799 59701 65 482 2146 0.9058 84.0 63.1 60461 67 542 2201 0.9058 85.1 62.0 60175 66 603 2146 0.7200 84.0 63.0 96761 60006 65 663 2146 0.9058 85.1 61.9 61348 64 723 2311 0.9058 84.5 62.8 59479 67 784 2146 0.9058 84.5 62.9 97231 61585 64 844 2146 0.7200 82.9 62.8 59742 64 904 2146 0.9058 82.3 62.8 60262 66 965 1500 0.9058 84.5 62.8 96604 61429 67 1025 2366 0.9058 84.0 62.9 59341 65 1086 1500 0.9058 84.0 62.3 60804 64 1146 2201 0.9058 83.4 62.8 96213 59546 65 1206 2256 0.9058 84.0 62.8 59360 64 1267 2366 0.9058 84.5 63.2 61687 68 1327 1500 0.9058 84.5 63.0 96053 64 1387 2146 0.9058 84.5 62.8 59159 66 1447 2146 0.9058 85.1 61.9 60655 65 1508 1500 0.9058 84.5 62.9 96349 67 1568 2400 0.7200 81.8 62.7 60491 66 1629 2146 0.9058 85.1 62.1 59962 64 1689 2400 0.9058 85.1 62.1 95281 63 1749 2146 0.9058 84.0 62.3 60429 61 1809 2146 0.9058 84.5 62.9 60390 64Average 2128 0.8878 82.8 61.8 97568 60368 65.3 Min 1500 0.7200 42.2 39.7 95281 59159 61.0 Max 2400 0.9058 85.1 63.2 106457 61815 69.0 Seconds MHz Volts CPU °C PMIC °C MB/sec KB/sec FPS 0 2400 0.9058 56.0 53.7 60 1500 0.7200 86.2 69.5 79094 19941 58 120 1500 0.7200 85.6 72.5 58012 52 181 1500 0.7200 87.8 73.9 57754 50 241 1500 0.7200 88.9 75.8 70129 56880 50 301 1500 0.7200 89.5 76.9 57616 48 362 1500 0.7200 89.5 77.0 64348 57313 45 422 1000 0.7200 90.6 77.1 57850 44 482 1500 0.7200 88.9 77.6 57341 57980 42 543 1000 0.7200 89.5 78.2 57245 44 603 1000 0.7200 90.0 78.1 57311 41 663 1000 0.7200 90.0 78.2 53759 57391 39 724 1000 0.7200 88.9 78.6 57486 37 784 1000 0.7200 89.5 78.1 57786 38 844 1000 0.7200 90.0 78.3 50933 57456 36 905 1000 0.7200 90.0 78.5 57914 37 965 1000 0.7200 90.6 78.7 56861 38 1025 1000 0.7200 90.0 78.6 49921 57428 37 1086 1500 0.7200 89.5 78.9 57705 36 1146 1000 0.7200 90.6 78.9 57445 38 1206 1000 0.7200 90.0 78.6 48803 57803 39 1267 1000 0.7200 90.0 78.9 57618 36 1327 1000 0.7200 90.0 79.1 36 1387 1000 0.7200 90.6 78.9 47790 57545 37 1448 1000 0.7200 90.0 78.5 58095 36 1508 1000 0.7200 90.6 79.4 34 1568 1000 0.7200 90.0 79.0 47234 57055 35 1629 1000 0.7200 91.7 79.1 57110 35 1689 1000 0.7200 91.1 79.5 34 1750 1000 0.7200 91.7 79.3 45528 56708 35 1810 1000 0.7200 91.7 79.4 56874 33Average 1174 0.7260 88.7 77.0 55898 56081 40.0 Min 1000 0.7200 56.0 53.7 45528 19941 33.0 Max 2400 0.9058 91.7 79.5 79094 58095 58.0 This session comprised INTitHOT64g12, with 2 threads at 64 KB, MP-FPUStress64g12 with 2 threads at 512 KB, burnindrive264g12 to a PC via Ethernet, burnindrive264g12 to a USB 3 disk drive and videogl64C12 as before. Detailed important results are provided for fan and no fan scenarios, with two for the former as the first one failed. Note that, compared with 4 thread results, those for 2 threads can be slower than expected as the main data source can be from L2 cache instead of L1.
On running these tests the main issue was that the second test failed due to data comparison failures on reading. The first indication was a system warning that the disk drive was no longer available but it was remounted.
Following are examples of reported errors, similar to the earlier ones described earlier in Disk Drive Errors and Crashes. These were thought to have been caused by the inadequate 3 amps power supply. Also, see the comments in the initial System Stress Testing summary.
Code:
Read passes 74 x 4 Files x 164.00 MB in 14.03 minutes Error reading file 1 Wrong File Read szzztestz-3 instead of szzztestz1 Error reading file 2 Pass 76 file szzztestz1 word 1, data error was FFFFFFFD expected FFFFFFFB Pass 76 file szzztestz1 word 2, data error was FFFFFFFD expected FFFFFFFB Code:
Integer Floating OpenGL & VMSTAT Program MHz Volts CPU °C PMIC °C MB/sec MFLOPS FPS Disk MB/s LAN MB/s Best 2400 114000 32000 102 63 36Test 9 NO FANAverage 1239 0.7312 88.7 77.5 38696 12361 39 Mainly 27 Min 1000 0.7200 70.8 64.7 30093 9836 31 58-59 Max 2400 0.9118 90.6 79.4 76652 22873 51Test 10 FANAverage 2288 0.9118 81.2 60.2 71940 24046 66 Error 27 Min 2146 0.9118 42.8 40.5 64379 22518 61 Max 2400 0.9118 84.0 61.7 78453 27388 70Test 11 FANAverage 2276 0.9080 80.8 59.7 71794 24003 66 Mainly 27 Min 1500 0.7950 41.7 38.8 59602 20594 60 57-58 Max 2400 0.9118 84.0 61.4 82481 26551 72Average No Fan%Reductions 46 19 9 23 46 49 41 -2 0At 100% CPU utilisation, the following measurements were similar to those during the No Fan Light System Test, with the CPU running at 1000 MHz for much of the time, temperatures around 90°C and that for the Power Management Integrated Circuit more than 78°C.
Code:
Test 9 NO FAN Integer Floating OpenGL VMSTAT Second MHz Volts CPU °C PMIC °C MB/sec MFLOPS FPS Disk MB/s 0 2400 0.9118 70.8 64.7 60 1500 0.7200 85.6 72.5 76652 22873 51 0.3 120 1500 0.7200 86.2 74.1 50138 15511 50 41.9 180 1500 0.7200 88.4 75.8 44886 15027 48 58.8 240 1500 0.7200 89.5 76.6 49106 15012 46 58.1 300 1500 0.7200 88.9 77.2 44702 14215 45 59.6 360 1000 0.7200 90.0 77.5 41739 12596 43 58.5 420 1500 0.7200 89.5 77.6 41734 12524 43 59.3 480 1000 0.7200 90.0 77.7 40211 12041 42 58.1 540 1000 0.7200 90.0 78.0 39083 13329 41 58.4 600 1500 0.7200 89.5 78.2 37814 12529 38 58.3 660 1500 0.7200 90.0 78.2 36144 11875 38 58.5 720 1000 0.7200 89.5 78.3 35741 11720 36 58.2 780 1000 0.7200 90.6 78.5 37614 13467 38 58.5 840 1000 0.7200 89.5 78.7 33104 10712 35 57.6 900 1000 0.7200 90.0 78.6 39563 11029 38 58.6 960 1000 0.7200 90.0 78.4 37259 11448 38 58.2 1020 1000 0.7200 89.5 78.9 34469 11583 39 57.8 1080 1000 0.7200 90.0 78.3 35970 11306 38 57.4 1140 1500 0.7200 90.0 78.7 34045 12281 36 58.6 1200 1000 0.7200 90.0 78.4 35297 10928 38 59.1 1260 1500 0.7200 90.0 78.9 37365 12002 36 58.3 1320 1000 0.7200 90.0 78.5 34004 11252 36 58.2 1380 1000 0.7200 90.0 78.4 34892 11070 34 58.8 1440 1000 0.7200 90.0 78.7 36255 10274 37 58.8 1500 1000 0.7200 88.9 78.7 33912 11320 37 58.3 1560 1500 0.7200 89.5 79.0 33513 11426 35 58.7 1620 1000 0.7200 89.5 79.0 30093 10650 35 58.8 1680 1000 0.7200 89.5 79.4 32852 9836 32 58.7 1740 1000 0.7200 90.0 79.1 30465 10273 31 122.6 1800 1500 0.8769 85.1 77.1 32262 10709 32 146.5 Average 1239 0.7312 88.7 77.5 38696 12361 39 Min 1000 0.7200 70.8 64.7 30093 9836 31 Max 2400 0.9118 90.6 79.4 76652 22873 51 As shown initially below, system behaviour did not appear to be much different to that, at the same point, during the later successful test. However, these are instantaneous measurements that can be different in the next picosecond. Also I did note USB power measurements of 4.8 volts at 0.53 amps, compared with 4.94 and 0.53 quoted earlier. But this might be due to infrequent manual sampling.
Code:
Tests 10 and 11 at 900 secondsT11 900 2366 0.9118 83.4 61.0 61490 24333 68 58.1T10 900 2256 0.9118 83.4 61.5 70134 22929 61 59.1 Test 10 FAN Integer Floating OpenGL VMSTAT Second MHz Volts CPU °C PMIC °C MB/sec MFLOPS FPS Disk MB/s 0 2400 0.9118 42.8 40.5 60 2400 0.9118 79.0 55.6 70918 25009 65 9.5 120 2201 0.9118 82.3 59.7 73729 23355 68 42.9 180 2366 0.9118 82.9 60.9 68151 24311 67 59.5 240 2311 0.9118 83.4 61.0 70410 23307 67 59.7 300 2146 0.9118 82.9 61.0 73093 23714 65 58.6 360 2311 0.9118 82.3 61.3 69355 22632 64 59.1 420 2311 0.9118 82.9 61.5 74376 23902 62 59.1 480 2311 0.9118 83.4 61.0 64379 23731 63 59.2 540 2201 0.9118 82.9 61.4 72430 22757 66 58.4 600 2201 0.9118 83.4 61.2 67268 25440 65 58.9 660 2256 0.9118 82.9 61.7 70452 22864 66 58.2 720 2311 0.9118 83.4 61.5 66588 22796 64 59.0 780 2256 0.9118 82.9 61.4 71766 22518 64 59.5 840 2146 0.9118 84.0 61.7 69162 23801 65 59.0 900 2256 0.9118 83.4 61.5 70134 22929 61 59.1 960 2201 0.9118 82.9 61.2 75122 24518 61 31.5 1020 2400 0.9118 82.9 61.4 74535 23855 64 0.1 FAILED 1080 2311 0.9118 82.9 61.0 74460 23832 62 0 1140 2256 0.9118 82.9 61.0 71397 23861 64 0 1200 2311 0.9118 83.4 61.0 75347 23264 64 0 1260 2311 0.9118 82.3 61.0 72384 24361 62 0 1320 2366 0.9118 83.4 61.5 74719 25401 70 2 1380 2400 0.9118 82.3 61.2 71234 24356 69 0 1440 2311 0.9118 83.4 61.4 73853 24652 67 0 1500 2366 0.9118 82.9 61.3 71402 24619 66 0 1560 2146 0.9118 84.0 61.4 78453 23417 70 0 1620 2256 0.9118 84.0 61.0 71631 24961 70 0 1680 2311 0.9118 82.9 61.0 74461 25101 69 0 1740 2201 0.9118 83.4 61.3 73486 24737 69 0 1800 2400 0.9118 70.3 57.1 73493 27388 68 0 Average 2288 0.9118 81.2 60.2 71940 24046 66 Min 2146 0.9118 42.8 40.5 64379 22518 61 Max 2400 0.9118 84.0 61.7 78453 27388 70Here, performance did not vary much but there was some CPU MHz throttling. Perhaps the official fan will avoid this and overcome observed undesirable power variations with the new 5 amps version.
Code:
Test 11 FAN Integer Floating OpenGL VMSTAT Second MHz Volts CPU °C PMIC °C MB/sec MFLOPS FPS Disk MB/s 0 2400 0.9118 41.7 38.8 60 2400 0.9118 74.7 53.7 77484 26076 67 4.5 120 2400 0.9118 81.8 58.7 82481 25011 72 42.3 180 2400 0.9118 82.9 60.0 74579 26236 66 58.3 240 2366 0.9118 81.8 60.1 69930 23368 63 57.7 300 2311 0.9118 83.4 60.5 76266 22233 68 57.9 360 2311 0.9118 83.4 60.7 72493 25286 66 58.7 420 2311 0.9118 82.3 61.0 67909 23927 70 57.9 480 2311 0.9118 83.4 60.8 73526 25794 63 57.6 540 2256 0.9118 83.4 61.0 74888 26551 67 57.9 600 2366 0.9118 82.9 61.0 74110 23912 66 57.4 660 2256 0.9118 82.9 61.1 75024 25414 65 57.6 720 2256 0.9118 82.9 61.0 59602 25025 65 59.1 780 2256 0.9118 83.4 61.0 67930 22907 65 57.1 840 2256 0.9118 84.0 61.0 71962 24011 67 58.2 900 2366 0.9118 83.4 61.0 61490 24333 68 58.1 960 2311 0.9118 82.3 61.1 63462 22888 65 58.2 1020 2256 0.9118 83.4 61.0 67540 25537 68 57.3 1080 2256 0.9118 82.9 61.0 70804 23791 66 57.8 1140 2400 0.9118 83.4 61.0 71113 22011 64 57.5 1200 2256 0.9118 82.3 61.4 77050 23111 70 58.7 1260 2311 0.9118 83.4 61.0 73053 24148 63 57.7 1320 2256 0.9118 82.3 60.9 74469 23307 66 57.6 1380 2256 0.9118 83.4 61.2 72160 22726 66 58.2 1440 2256 0.9118 82.3 60.9 73994 24276 66 59.5 1500 2256 0.9118 83.4 61.0 72659 22260 67 56.9 1560 2256 0.9118 82.9 61.2 74870 21866 68 57.8 1620 2256 0.9118 83.4 61.0 76735 23945 66 57.5 1680 2201 0.9118 83.4 60.9 70727 20594 66 57.6 1740 2311 0.9118 83.4 61.2 65023 24760 63 123.7 1800 1500 0.7950 64.2 55.4 70479 24786 60 158.3 Average 2276 0.9080 80.8 59.7 71794 24003 66 Min 1500 0.7950 41.7 38.8 59602 20594 60 Max 2400 0.9118 84.0 61.4 82481 26551 72 Statistics: Posted by RoyLongbottom — Wed Jan 17, 2024 4:06 pm