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2024-04-24 - 17:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot3s.osadl.org (updated Wed Apr 24, 2024 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2421122450,3sleep324028-21/usr/sbin/munin07:07:313
327432950,2sleep00-21swapper/011:32:050
70442940,2sleep00-21swapper/007:57:460
187002900,2sleep20-21swapper/211:12:142
2585699764,35cyclictest0-21swapper/007:37:240
152562750,2sleep00-21swapper/009:32:370
25856997110,18cyclictest2625650ssh11:22:310
25856996645,5cyclictest8150irq/56-dwc_otg_12:02:290
2585699664,36cyclictest0-21swapper/008:27:240
181162660,2sleep20-21swapper/209:37:182
2585699656,15cyclictest0-21swapper/008:22:320
2585699642,32cyclictest28460-21ssh09:52:290
25856996010,20cyclictest0-21swapper/011:57:270
25856995935,4cyclictest8050irq/56-dwc_otg_09:17:330
2585699592,31cyclictest0-21swapper/012:32:330
25856995813,19cyclictest30434-21/usr/sbin/munin07:27:330
247472573,7sleep10-21swapper/107:07:431
25856995628,6cyclictest20878-21grep12:37:500
25856995616,22cyclictest1292-21runrttasks09:47:240
2585699561,38cyclictest748-21ls09:57:470
2585699561,32cyclictest5557-21grep07:52:590
10382560,2sleep20-21swapper/207:37:402
2585899557,23cyclictest0-21swapper/212:17:312
2585899556,9cyclictest8050irq/56-dwc_otg_12:37:312
2585699558,24cyclictest0-21swapper/012:27:080
2585699555,27cyclictest15802-21rm11:07:380
25856995534,6cyclictest8150irq/56-dwc_otg_10:02:340
25856995533,6cyclictest8150irq/56-dwc_otg_09:12:470
2585699552,33cyclictest12168-21ntpq12:27:410
25856995419,16cyclictest13094-21switchtime11:02:460
25856995324,18cyclictest22004-21unixbench_singl10:27:520
2585699531,27cyclictest14945-21grep10:17:500
25856995229,5cyclictest1158-21fschecks_time11:32:330
2585699522,26cyclictest11-21rcu_preempt11:17:410
25856995120,7cyclictest7950irq/56-dwc_otg09:12:180
25858995015,10cyclictest8050irq/56-dwc_otg_09:37:292
2585799505,24cyclictest0-21swapper/108:02:271
2585699503,27cyclictest0-21swapper/009:37:300
2585699501,35cyclictest0-21swapper/012:12:370
2585699501,30cyclictest0-21swapper/011:47:300
2585999498,19cyclictest11000-21ssh12:27:183
2585699499,32cyclictest0-21swapper/009:02:480
25856994928,5cyclictest8150irq/56-dwc_otg_11:37:530
2585699492,27cyclictest0-21swapper/010:17:190
25856994916,16cyclictest7950irq/56-dwc_otg09:22:530
25856994916,16cyclictest7950irq/56-dwc_otg09:22:530
2585699491,32cyclictest28506-21aten_rbpower_po07:22:280
2585699491,32cyclictest28506-21aten_rbpower_po07:22:280
2585699491,28cyclictest11545-21cut09:27:360
253902495,36sleep00-21swapper/007:09:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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