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2026-04-13 - 17:17

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 Mon Apr 13, 2026 12:43:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
784224780,3sleep10-21swapper/116:26:071
784224780,3sleep10-21swapper/116:26:071
2158321750,5sleep2884399cyclictest19:50:202
884199977,46cyclictest0-21swapper/018:00:550
106962950,1sleep20-21swapper/220:54:542
230152870,10sleep3381ktimersoftd/321:09:403
230152870,10sleep3381ktimersoftd/321:09:403
159792780,3sleep123-21ksoftirqd/119:42:421
884199777,42cyclictest0-21swapper/016:55:560
224102770,1sleep00-21swapper/020:30:120
194932760,2sleep10-21swapper/119:46:331
8843997528,12cyclictest7850irq/56-dwc_otg_19:25:542
117992740,2sleep3884499cyclictest16:36:103
89412730,2sleep30-21swapper/320:13:323
80522720,2sleep20-21swapper/221:30:492
80522720,2sleep20-21swapper/221:30:492
156592720,2sleep10-21swapper/118:16:111
90302710,1sleep10-21swapper/116:30:571
8841997038,16cyclictest0-21swapper/018:35:580
884199701,55cyclictest31258-21latency_hist20:40:440
884199701,55cyclictest31258-21latency_hist20:40:440
256332700,2sleep3381ktimersoftd/319:55:083
884399695,20cyclictest9497-21ssh19:35:492
884399671,51cyclictest5856-21/usr/sbin/munin17:51:012
884399671,51cyclictest26287-21ssh21:13:042
884399661,44cyclictest19825-21diskmemload18:39:082
884199662,41cyclictest0-21swapper/019:20:550
884199661,49cyclictest505-21rs:main0
884399651,51cyclictest32112-21rm21:59:302
884399651,44cyclictest18559-21load16:56:032
8841996540,9cyclictest0-21swapper/020:06:130
8841996440,12cyclictest20530-21grep18:31:000
8841996437,11cyclictest8744-21aten_rbpower_en18:55:560
8841996437,11cyclictest8744-21aten_rbpower_en18:55:560
884399632,39cyclictest14581-21ssh20:20:512
8843996318,43cyclictest14749-21aten_rbpower_vo18:15:582
884399631,54cyclictest32685-21latency_hist18:45:432
884399631,50cyclictest16206-21apt-get16:50:552
884399631,47cyclictest30710-21diskstats20:01:012
884399631,40cyclictest2977-21ssh18:48:322
884399631,38cyclictest13173-21/usr/sbin/munin21:36:082
8841996339,4cyclictest0-21swapper/018:10:570
8841996336,12cyclictest0-21swapper/019:41:090
884199632,42cyclictest0-21swapper/020:15:570
884199631,53cyclictest9460-21chrt19:35:450
200742630,2sleep30-21swapper/318:30:463
884499621,27cyclictest0-21swapper/317:50:583
8843996216,8cyclictest7950irq/56-dwc_otg_20:05:552
884399621,45cyclictest24685-21ssh19:53:252
884399621,44cyclictest16500-21ssh19:05:262
884399621,43cyclictest17356-21ssh21:01:552
884399621,42cyclictest681-21ssh20:41:492
884399621,42cyclictest26631-21ssh19:16:132
884399621,37cyclictest17295-21/usr/sbin/munin18:21:072
8841996234,11cyclictest0-21swapper/018:40:570
8841996231,9cyclictest0-21swapper/021:15:540
884199622,40cyclictest0-21swapper/019:16:050
884199621,48cyclictest29736-21ntp_kernel_pll_21:56:050
884399613,7cyclictest7750irq/56-dwc_otg17:20:562
884399611,43cyclictest7247-21ssh18:53:452
884399611,42cyclictest14142-21ssh20:20:272
884399611,39cyclictest1629-21ssh21:22:072
884399611,38cyclictest11994-21modprobe16:37:422
884199616,42cyclictest17713-21unixbench_singl21:41:120
8841996136,13cyclictest13131-21fschecks_count19:01:000
8841996136,12cyclictest0-21swapper/016:50:590
8841996131,15cyclictest0-21swapper/016:30:560
8841996117,24cyclictest415-21fschecks_count17:36:000
8841996117,24cyclictest415-21fschecks_count17:36:000
884399601,39cyclictest32631-21sh19:24:362
884399601,38cyclictest22527-21timerandwakeup17:06:092
884399601,37cyclictest11772-21fschecks_count20:55:592
884399601,36cyclictest23702-21ssh19:13:262
884199607,44cyclictest0-21swapper/017:25:570
884199602,38cyclictest14769-21aten_rbpower_vo20:20:560
884199601,40cyclictest20599-21apt-get21:45:490
884199601,40cyclictest20599-21apt-get21:45:490
884399591,48cyclictest23313-21ssh21:10:132
884399591,48cyclictest23313-21ssh21:10:132
884399591,47cyclictest24794-21ssh21:50:532
884399591,46cyclictest18348-21ssh21:42:182
884399591,42cyclictest15177-21ssh19:41:142
884399591,40cyclictest28447-21perl21:16:002
884399591,36cyclictest9621-21ssh20:14:462
884199595,46cyclictest917-21snmpd17:06:020
884199593,45cyclictest0-21swapper/016:36:020
8841995934,12cyclictest1596-21unixbench_multi18:46:120
8841995918,29cyclictest20064-21fschecks_count21:06:000
8841995918,29cyclictest20064-21fschecks_count21:06:000
884199591,39cyclictest26893-21idleruntime-cro17:20:420
884399585,36cyclictest7950irq/56-dwc_otg_17:01:032
884399581,47cyclictest23561-21ssh18:34:472
884399581,46cyclictest7607-21ssh21:30:262
884399581,40cyclictest4493-21grep17:46:042
884399581,38cyclictest19148-21ssh20:26:002
8841995836,7cyclictest7850irq/56-dwc_otg_20:45:540
8841995832,11cyclictest0-21swapper/017:55:420
237212580,2sleep00-21swapper/019:51:390
884399571,39cyclictest26292-21ssh20:34:412
884399571,37cyclictest14066-21munin-run16:45:422
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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