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2026-05-07 - 17:30

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 100 highest latencies:
System rack7slot3s.osadl.org (updated Thu May 07, 2026 12:43:38)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2337021650,1sleep30-21swapper/320:56:053
480121340,2sleep14802-21rm21:11:331
20512991027,23cyclictest30216-21ssh19:46:080
176672700,2sleep10-21swapper/120:09:531
2051299698,48cyclictest11961-21fschecks_count21:21:110
2051299693,22cyclictest0-21swapper/018:36:070
2051299693,22cyclictest0-21swapper/018:36:070
2051299684,38cyclictest0-21swapper/019:31:230
20512996835,11cyclictest6136-21awk17:20:550
195872680,1sleep10-21swapper/116:26:211
2051299675,44cyclictest9870-21ssh20:00:550
2051299675,44cyclictest9870-21ssh20:00:550
2051299662,33cyclictest24505-21fschecks_count16:41:120
2051299653,45cyclictest11352-21sort20:41:130
2051299645,32cyclictest21410-21awk18:56:170
2051299642,42cyclictest10606-21unixbench-2d19:21:210
2051299634,37cyclictest26939-21aten_rbpower_en20:21:080
20512996331,17cyclictest0-21swapper/020:06:060
20512996312,47cyclictest101ktimersoftd/019:40:550
96892620,5sleep32051799cyclictest20:00:373
96892620,5sleep32051799cyclictest20:00:373
2051299627,44cyclictest23213-21latency_hist20:55:560
2051299626,45cyclictest3911-21latency_hist21:50:560
2051299622,44cyclictest0-21swapper/021:04:470
142562620,2sleep114238-21missed_timers19:26:171
142562620,2sleep114238-21missed_timers19:26:171
2051299618,26cyclictest13951-21ssh19:26:130
2051299618,26cyclictest13951-21ssh19:26:130
2051299606,43cyclictest0-21swapper/020:50:000
20512996036,13cyclictest101ktimersoftd/016:50:140
20512996036,13cyclictest101ktimersoftd/016:50:140
20512996025,17cyclictest0-21swapper/018:31:170
2051299594,34cyclictest28274-21grep18:21:110
20512995934,10cyclictest7950irq/56-dwc_otg_18:53:340
20512995934,10cyclictest0-21swapper/016:31:060
20512995915,4cyclictest0-21swapper/017:26:070
2051299591,36cyclictest5605-21uniq19:16:120
2051299585,29cyclictest25969-21modprobe18:15:550
2051299582,40cyclictest9-21ksoftirqd/021:16:250
20512995815,3cyclictest0-21swapper/017:00:550
20512995811,44cyclictest101ktimersoftd/017:36:220
2051299574,18cyclictest7750irq/56-dwc_otg17:06:060
2051299571,6cyclictest31706-21rm21:06:070
2051299571,6cyclictest31706-21rm21:06:070
2051299569,27cyclictest12659-21kernelversion18:46:140
2051299569,18cyclictest21241-21grep21:31:240
2051299567,41cyclictest11187-21taskset21:59:270
2051299567,31cyclictest24225-21ssh20:56:200
2051299565,25cyclictest0-21swapper/017:15:560
2051299563,32cyclictest0-21swapper/020:01:160
20512995630,9cyclictest0-21swapper/019:41:180
20512995623,17cyclictest26206-21/usr/sbin/munin18:16:220
2051299561,35cyclictest29616-21idleruntime19:06:120
2051299561,35cyclictest29616-21idleruntime19:06:120
2051299554,47cyclictest101ktimersoftd/020:35:550
20512995536,5cyclictest101ktimersoftd/017:31:140
2051299552,28cyclictest20636-21latency_hist18:00:560
201552552,46sleep00-21swapper/016:29:490
20512995429,13cyclictest0-21swapper/020:29:490
20512995425,4cyclictest3778-21fschecks_time21:11:120
2051299542,36cyclictest0-21swapper/018:10:550
20512995415,17cyclictest25230-21sh20:18:330
2051299541,39cyclictest10792-21latency_hist20:40:560
2051299541,39cyclictest10792-21latency_hist20:40:560
2051299541,35cyclictest3040-21timerwakeupswit19:51:230
2051299541,33cyclictest8899-21grep18:41:210
2051299541,29cyclictest25577-21systemd-journal20:14:110
2051399536,11cyclictest0-21swapper/117:21:061
20512995336,9cyclictest101ktimersoftd/021:28:320
20512995314,36cyclictest101ktimersoftd/018:26:250
2051399524,26cyclictest7850irq/56-dwc_otg_16:30:571
2051699512,34cyclictest7950irq/56-dwc_otg_19:36:082
2051299518,27cyclictest30160-21sh21:42:280
20512995123,7cyclictest24377-21fschecks_count21:36:110
2051299512,31cyclictest2105-21ssh19:11:230
20512995019,5cyclictest7850irq/56-dwc_otg_21:51:120
2051299501,32cyclictest27775-21sh19:04:000
2051799493,8cyclictest7950irq/56-dwc_otg_19:26:073
2051799493,8cyclictest7950irq/56-dwc_otg_19:26:073
2051399493,8cyclictest0-21swapper/118:06:071
20513994925,6cyclictest12588-21if_eth018:46:131
20512994923,4cyclictest28372-21wc16:51:150
2051299492,25cyclictest0-21swapper/017:46:140
20513994823,7cyclictest7750irq/56-dwc_otg20:31:071
2051299482,42cyclictest6678-21grep17:21:110
2051399473,3cyclictest0-21swapper/120:16:081
2051399472,7cyclictest7750irq/56-dwc_otg19:16:061
2051299466,26cyclictest0-21swapper/017:01:090
20512994626,10cyclictest0-21swapper/017:41:580
2051299462,32cyclictest9-21ksoftirqd/016:36:100
20517994516,8cyclictest8231-21/usr/sbin/munin21:56:253
20516994522,5cyclictest13094-21ls18:46:212
20516994521,6cyclictest18342-21ssh20:10:562
2051399453,7cyclictest1969-21rm19:51:091
20513994529,4cyclictest19067-21latency_hist20:50:561
2051299447,24cyclictest0-21swapper/018:01:120
2051299447,24cyclictest0-21swapper/018:01:120
22762430,6sleep22051699cyclictest19:11:252
2051699437,26cyclictest0-21swapper/218:01:082
2051699437,26cyclictest0-21swapper/218:01:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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