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2025-11-16 - 11:02

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 here to display the system's profile data or here to proceed to next system.
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 Sun Nov 16, 2025 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2700421840,5sleep20-21swapper/219:05:302
145982980,2sleep20-21swapper/223:25:362
39562930,4sleep30-21swapper/323:55:203
242042880,5sleep02811699cyclictest21:32:380
2811699847,72cyclictest0-21swapper/000:15:190
28116998350,5cyclictest32078-21apt-get00:35:160
294712820,5sleep029474-21unixbench_singl20:40:330
100122820,2sleep20-21swapper/222:38:502
187842810,2sleep20-21swapper/222:07:542
71912800,2sleep00-21swapper/023:16:120
28116997352,15cyclictest0-21swapper/021:40:200
2811699734,10cyclictest0-21swapper/022:25:180
64322720,1sleep20-21swapper/222:34:232
224192720,2sleep30-21swapper/323:36:003
2811699689,42cyclictest9-21ksoftirqd/023:25:040
2811699689,42cyclictest9-21ksoftirqd/023:25:040
28116996812,8cyclictest0-21swapper/023:35:160
2811699678,47cyclictest9-21ksoftirqd/019:45:170
154622660,4sleep115461-21latency00:10:271
154622660,4sleep115461-21latency00:10:271
12642660,1sleep10-21swapper/100:36:441
2811699655,36cyclictest28115-21cyclictest20:55:190
322452640,2sleep20-21swapper/223:06:562
2811699647,54cyclictest0-21swapper/000:25:190
28116996446,9cyclictest13679-21unixbench_multi22:00:350
2811699612,56cyclictest61-21kswapd022:20:160
2811699607,21cyclictest0-21swapper/019:25:190
28116996019,29cyclictest0-21swapper/020:15:190
314862590,4sleep3381ktimersoftd/300:34:213
2811699597,39cyclictest0-21swapper/022:35:180
28116995935,10cyclictest101ktimersoftd/023:05:310
28116995932,12cyclictest14542-21modprobe00:10:030
28116995919,10cyclictest0-21swapper/019:55:200
2811799581,30cyclictest0-21swapper/122:15:161
28116995824,26cyclictest0-21swapper/020:05:040
28116995824,26cyclictest0-21swapper/020:05:040
28116995740,6cyclictest0-21swapper/021:35:230
28116995737,12cyclictest101ktimersoftd/023:50:210
2811699571,22cyclictest0-21swapper/022:10:160
28116995642,8cyclictest18061-21switchtime23:30:300
28116995632,12cyclictest101ktimersoftd/020:20:220
28116995623,15cyclictest28675-21cut23:45:180
2811699552,25cyclictest0-21swapper/021:00:150
28116995436,5cyclictest7950irq/56-dwc_otg_22:45:220
28116995435,3cyclictest0-21swapper/021:05:290
2811699541,31cyclictest2025-21cut23:10:220
28116995411,27cyclictest0-21swapper/020:05:320
28116995329,5cyclictest8177-21latency_hist19:45:030
28116995316,23cyclictest13073-21ssh22:42:170
28116995245,4cyclictest101ktimersoftd/019:50:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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