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2026-05-07 - 13:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #2

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack7slot2s.osadl.org (updated Sun Apr 26, 2026 00:48:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3472239927687,121cyclictest0-21swapper/022:57:090
34722399274164,96cyclictest0-21swapper/022:26:090
34722399274164,96cyclictest0-21swapper/022:26:090
34722399273187,54cyclictest171rcu_preempt20:11:420
34722399268160,93cyclictest0-21swapper/023:31:080
34722399268160,93cyclictest0-21swapper/023:31:080
34722399268156,98cyclictest396787-21rm23:26:160
34722399268110,105cyclictest386496-21kworker/u9:4+xprtiod22:42:030
34722399268110,105cyclictest386496-21kworker/u9:4+xprtiod22:42:030
34722399267148,75cyclictest347222-21cyclictest19:15:560
34722399267138,91cyclictest0-21swapper/019:10:360
34722399267138,91cyclictest0-21swapper/019:10:360
34722399266161,68cyclictest171rcu_preempt19:27:010
34722399266161,68cyclictest171rcu_preempt19:27:010
34722399263148,100cyclictest376304-21gcc21:51:060
34722399263148,100cyclictest376304-21gcc21:51:060
34722399261165,53cyclictest171rcu_preempt19:20:430
34722399261165,53cyclictest171rcu_preempt19:20:430
3472239926094,125cyclictest401643-21munin-run23:50:010
34722399260172,54cyclictest171rcu_preempt00:30:070
34722399260172,54cyclictest171rcu_preempt00:30:070
34722399260108,112cyclictest0-21swapper/022:10:060
34722399260105,111cyclictest372861-21ssh21:35:310
34722399260105,111cyclictest372861-21ssh21:35:310
3472239925998,124cyclictest0-21swapper/000:18:280
3472239925998,124cyclictest0-21swapper/000:18:280
34722399259147,95cyclictest0-21swapper/021:16:350
34722399259147,95cyclictest0-21swapper/021:16:350
34722399259142,99cyclictest0-21swapper/021:11:110
34722399259142,99cyclictest0-21swapper/021:11:110
34722399259140,85cyclictest171rcu_preempt20:50:450
34722399259140,85cyclictest171rcu_preempt20:50:450
34722399259137,105cyclictest0-21swapper/023:19:540
34722399259137,105cyclictest0-21swapper/023:19:530
34722399259104,119cyclictest399798-21ssh23:40:340
34722399259103,122cyclictest0-21swapper/019:55:030
34722399259103,122cyclictest0-21swapper/019:55:030
34722399258153,88cyclictest0-21swapper/000:01:360
34722399258153,88cyclictest0-21swapper/000:01:360
34722399258106,130cyclictest377440-21awk21:56:280
34722399258106,130cyclictest377440-21awk21:56:280
34722399257152,90cyclictest0-21swapper/022:30:450
34722399257130,110cyclictest0-21swapper/021:25:570
34722399257130,110cyclictest0-21swapper/021:25:570
34722399257116,101cyclictest398637-21apt-get23:35:280
34722399257105,114cyclictest0-21swapper/021:00:310
34722399257105,114cyclictest0-21swapper/021:00:300
34722399257104,117cyclictest0-21swapper/022:22:260
34722399256152,87cyclictest0-21swapper/022:36:300
34722399256152,87cyclictest0-21swapper/022:36:300
34722399256151,90cyclictest401957-21ssh23:50:430
34722399256151,90cyclictest401957-21ssh23:50:430
34722399255164,55cyclictest171rcu_preempt20:55:110
34722399255152,87cyclictest0-21swapper/000:22:020
34722399255140,101cyclictest716-21snmpd00:07:540
34722399255140,101cyclictest716-21snmpd00:07:540
34722399255103,119cyclictest0-21swapper/000:37:470
34722399254168,54cyclictest171rcu_preempt20:30:580
34722399254158,82cyclictest0-21swapper/023:56:470
34722399254158,82cyclictest0-21swapper/023:56:460
34722399254152,86cyclictest0-21swapper/000:30:520
34722399254148,79cyclictest171rcu_preempt20:37:000
34722399254147,90cyclictest0-21swapper/023:05:360
34722399254147,90cyclictest0-21swapper/023:05:360
34722399254131,105cyclictest0-21swapper/023:20:210
34722399254118,119cyclictest0-21swapper/019:36:490
34722399254118,119cyclictest0-21swapper/019:36:490
34722399253146,92cyclictest0-21swapper/022:50:560
34722399253146,92cyclictest0-21swapper/022:50:550
3472239925297,122cyclictest371961-21memory21:30:530
3472239925297,120cyclictest1-21systemd20:08:510
3472239925297,120cyclictest1-21systemd20:08:500
34722399252145,89cyclictest0-21swapper/020:20:420
34722399252145,89cyclictest0-21swapper/020:20:420
34722399252102,115cyclictest0-21swapper/020:50:040
34722399251134,94cyclictest380062-21kworker/u10:6-rpciod22:11:080
34722399250148,57cyclictest171rcu_preempt20:01:100
34722399250128,106cyclictest0-21swapper/020:40:350
34722399250128,106cyclictest0-21swapper/020:40:350
34722399249154,76cyclictest0-21swapper/022:15:350
34722399249144,88cyclictest0-21swapper/000:11:040
34722399249144,88cyclictest0-21swapper/000:11:040
34722399249141,92cyclictest0-21swapper/019:35:010
34722399249141,92cyclictest0-21swapper/019:35:010
34722399249135,99cyclictest355524-21vmstat19:57:100
3472239924893,95cyclictest0-21swapper/019:41:050
3472239924888,108cyclictest378577-21ssh22:01:400
3472239924888,108cyclictest378577-21ssh22:01:400
34722399248135,96cyclictest0-21swapper/020:20:000
34722399248121,91cyclictest385423-21kworker/u9:7+rpciod23:10:190
34722399247121,104cyclictest364706-21kworker/u9:11+rpciod21:22:070
34722399247121,104cyclictest364706-21kworker/u9:11+rpciod21:22:070
34722399247103,111cyclictest374179-21ntpq21:41:050
34722399247103,111cyclictest374179-21ntpq21:41:050
34722399247102,121cyclictest363053-21kworker/u9:8+xprtiod21:45:340
34722399247102,121cyclictest363053-21kworker/u9:8+xprtiod21:45:330
3472239924595,126cyclictest391538-21ntpq23:02:000
34722399245112,100cyclictest0-21swapper/021:06:090
34722399245112,100cyclictest0-21swapper/021:06:080
34722399241142,55cyclictest171rcu_preempt19:45:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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