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2026-04-17 - 01:45

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 100 highest latencies:
System rack7slot3s.osadl.org (updated Thu Apr 16, 2026 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80832910,3sleep3381ktimersoftd/319:02:033
129412810,1sleep00-21swapper/018:30:520
81202770,3sleep1175499cyclictest20:21:001
306222700,2sleep1221ktimersoftd/120:47:171
1752997023,11cyclictest13-21rcuc/017:45:570
107642690,1sleep30-21swapper/319:45:393
175299666,50cyclictest0-21swapper/019:50:590
175299653,38cyclictest5533-21grep16:40:570
1752996444,12cyclictest0-21swapper/021:51:110
175299643,16cyclictest27115-21unixbench-2d18:46:120
175299636,42cyclictest0-21swapper/021:25:580
175299631,6cyclictest28268-21grep17:41:120
175699628,13cyclictest25926-21ssh18:45:563
1752996117,15cyclictest21630-21acpi18:40:540
1752996117,15cyclictest21630-21acpi18:40:540
175299601,9cyclictest28256-21unixbench_multi19:26:150
107122601,2sleep00-21swapper/020:23:500
175299595,23cyclictest1668-21kworker/u8:119:20:550
175299591,7cyclictest2631-21grep16:31:080
13222590,50sleep10-21swapper/116:28:491
1752995839,8cyclictest0-21swapper/021:11:020
1752995839,8cyclictest0-21swapper/021:11:020
175299581,28cyclictest0-21swapper/020:05:570
13562583,13sleep00-21swapper/016:29:160
55672560,2sleep00-21swapper/019:38:440
1752995632,6cyclictest7950irq/56-dwc_otg_17:05:450
175299551,10cyclictest0-21swapper/017:10:540
1754995419,13cyclictest7850irq/56-dwc_otg_19:35:571
175299544,28cyclictest8775-21kworker/0:218:38:230
175299542,31cyclictest5265-21ssh20:56:070
175299542,27cyclictest6345-21aten_rbpower_cu19:00:580
175299534,14cyclictest9-21ksoftirqd/020:40:570
175299534,14cyclictest9-21ksoftirqd/020:40:570
175299531,35cyclictest25688-21apt-get22:00:440
175299525,5cyclictest0-21swapper/018:51:050
175299522,29cyclictest22394-21ntpq17:26:070
1752995217,5cyclictest5968-21fschecks_time18:11:020
175299521,5cyclictest10272-21timerwakeupswit18:21:090
175299517,40cyclictest2447-21runrttasks21:31:120
175299512,31cyclictest11390-21wget19:45:580
1752995118,16cyclictest21407-21sh21:16:000
175299511,27cyclictest9558-21wget21:40:590
175499502,19cyclictest0-21swapper/118:30:551
175299507,22cyclictest0-21swapper/020:14:260
175299501,27cyclictest4222-21sh20:16:040
1752995011,20cyclictest15128-21/usr/sbin/munin19:11:020
1752995011,20cyclictest15128-21/usr/sbin/munin19:11:020
7942490,6sleep20-21swapper/216:26:102
1752994926,5cyclictest7950irq/56-dwc_otg_17:40:440
1752994925,5cyclictest7850irq/56-dwc_otg_16:50:440
175299492,32cyclictest101ktimersoftd/017:51:050
175299491,27cyclictest10727-21cut19:06:010
175499487,28cyclictest0-21swapper/116:55:581
175499482,5cyclictest0-21swapper/118:55:561
175499481,19cyclictest3519-21latency_hist16:35:451
175299484,15cyclictest20867-21timerandwakeup17:21:100
175299482,27cyclictest0-21swapper/017:55:490
175299481,7cyclictest14093-21/usr/sbin/munin21:46:020
1752994813,19cyclictest9450irq/48-DMA09:12:250
175299481,14cyclictest12644-21diskmemload20:51:120
175499478,23cyclictest7750irq/56-dwc_otg19:56:141
175299476,29cyclictest29830-21ls20:46:130
1752994723,6cyclictest7950irq/56-dwc_otg_19:40:570
1752994717,7cyclictest25624-21grep21:21:010
175699465,14cyclictest15447-21ssh19:50:583
175699463,27cyclictest0-21swapper/317:35:553
175599467,25cyclictest12894-21ssh21:05:582
175599467,25cyclictest0-21swapper/217:05:572
1752994626,9cyclictest101ktimersoftd/020:05:340
1752994623,2cyclictest0-21swapper/018:56:010
1752994614,18cyclictest16238-21latency_hist17:10:450
1752994614,18cyclictest0-21swapper/019:31:140
175299461,26cyclictest0-21swapper/021:09:290
175299461,26cyclictest0-21swapper/020:35:450
1755994527,5cyclictest23570-21wget17:30:582
1755994526,7cyclictest22434-21ssh18:41:072
1755994526,7cyclictest22434-21ssh18:41:072
175299458,20cyclictest8607-21unixbench_singl18:16:110
175299452,8cyclictest11392-21fschecks_time18:26:020
175299452,23cyclictest0-21swapper/016:56:110
1752994520,3cyclictest0-21swapper/018:01:040
175299451,24cyclictest0-21swapper/019:57:460
175299451,23cyclictest0-21swapper/017:16:110
175299451,23cyclictest0-21swapper/017:16:110
1752994511,16cyclictest10190-21unixbench_multi16:51:120
175699447,23cyclictest0-21swapper/321:50:583
175699445,5cyclictest7950irq/56-dwc_otg_20:25:583
175499448,23cyclictest0-21swapper/117:55:511
175299449,16cyclictest0-21swapper/018:06:050
175299442,23cyclictest0-21swapper/021:36:060
175299442,23cyclictest0-21swapper/021:36:060
1752994418,12cyclictest7750irq/56-dwc_otg19:16:000
73522430,2sleep20-21swapper/221:37:342
73522430,2sleep20-21swapper/221:37:342
242682431,3sleep10-21swapper/117:31:091
175599437,24cyclictest0-21swapper/217:55:582
175499436,23cyclictest0-21swapper/118:10:581
1754994320,5cyclictest21837-21aten_rbpower_vo17:26:001
207682420,3sleep11750-21cyclictest19:17:351
175699427,23cyclictest0-21swapper/317:30:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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