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2025-06-19 - 07:40

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 Thu Jun 19, 2025 00:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
224432990,6sleep02476599cyclictest00:23:240
319722790,2sleep20-21swapper/219:30:052
2476599786,25cyclictest0-21swapper/020:30:170
24765997835,9cyclictest0-21swapper/022:05:190
2476599781,49cyclictest0-21swapper/021:00:170
51092770,2sleep20-21swapper/219:45:182
243672760,4sleep324369-21unixbench_multi20:35:343
243672760,4sleep324369-21unixbench_multi20:35:343
2476599749,36cyclictest0-21swapper/021:50:170
97212730,2sleep00-21swapper/021:17:420
2476699717,26cyclictest0-21swapper/123:05:161
212302710,2sleep32476899cyclictest00:20:373
2476599704,48cyclictest0-21swapper/019:35:170
2476599704,48cyclictest0-21swapper/019:35:170
317182690,1sleep10-21swapper/121:45:361
23492690,1sleep30-21swapper/321:05:293
65482670,2sleep10-21swapper/121:55:271
24766996722,14cyclictest1547-21seq22:30:321
303702650,3sleep130369-21sh00:35:041
24766996419,28cyclictest5411-21ssh21:11:421
24766996322,14cyclictest29425-21ssh23:50:171
24765996317,5cyclictest0-21swapper/023:35:220
2476599631,50cyclictest0-21swapper/023:23:200
2476699616,18cyclictest8050irq/56-dwc_otg_19:40:181
24766996121,27cyclictest17983-21ssh22:52:381
24766996121,20cyclictest11524-21rm22:01:361
24766996116,17cyclictest19852-21tune2fs22:55:241
24766996027,16cyclictest7642-21ssh00:03:571
24766996017,23cyclictest11169-21ls23:25:341
24765996029,14cyclictest24837-21ssh22:20:050
2476599593,38cyclictest0-21swapper/000:05:160
24766995835,20cyclictest8050irq/56-dwc_otg_21:25:191
24766995819,20cyclictest19658-21ssh23:36:301
24766995816,24cyclictest16236-21entropy20:15:221
24765995814,23cyclictest0-21swapper/000:14:010
2476599581,38cyclictest0-21swapper/023:15:210
24766995722,12cyclictest1003-21sshd19:33:371
24766995721,21cyclictest14000-21ssh22:47:121
24766995720,19cyclictest6500-21ssh22:37:271
24766995717,24cyclictest20848-21/usr/sbin/munin00:20:341
24766995712,10cyclictest0-21swapper/122:20:041
24765995733,6cyclictest19902-21cut20:25:240
24765995731,16cyclictest4191-21timerwakeupswit19:40:310
24765995719,4cyclictest29091-21munin-plugin-st23:50:030
24766995625,8cyclictest29787-21ntp_states22:25:301
24766995621,21cyclictest16756-21ssh23:33:271
24766995619,20cyclictest15301-21ssh22:06:261
24765995642,3cyclictest0-21swapper/021:05:220
24765995635,5cyclictest7950irq/56-dwc_otg_19:50:040
24765995623,6cyclictest30325-21wget19:25:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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