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2026-08-13 - 00:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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 rackaslot5s.osadl.org (updated Wed Aug 12, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811200,0rcu_preempt19-21ksoftirqd/112:30:091
811070,0rcu_preempt3-21ksoftirqd/009:13:580
81980,0rcu_preempt3-21ksoftirqd/012:25:350
81980,0rcu_preempt3-21ksoftirqd/012:09:100
81980,0rcu_preempt19-21ksoftirqd/109:58:271
81880,0rcu_preempt3-21ksoftirqd/009:15:270
81820,0rcu_preempt3-21ksoftirqd/012:33:070
81780,0rcu_preempt3-21ksoftirqd/011:40:080
81780,0rcu_preempt28682-21kworker/0:211:24:130
81740,0rcu_preempt3-21ksoftirqd/012:14:510
81740,0rcu_preempt3-21ksoftirqd/012:02:110
81740,0rcu_preempt3-21ksoftirqd/011:03:380
81740,0rcu_preempt3-21ksoftirqd/009:30:320
81730,0rcu_preempt0-21swapper/010:09:370
81720,0rcu_preempt3-21ksoftirqd/011:11:280
81720,0rcu_preempt3-21ksoftirqd/010:34:090
81720,0rcu_preempt3-21ksoftirqd/009:51:410
81720,0rcu_preempt3-21ksoftirqd/009:43:400
81720,0rcu_preempt3-21ksoftirqd/009:37:100
81720,0rcu_preempt3-21ksoftirqd/008:25:090
81710,0rcu_preempt3-21ksoftirqd/012:39:310
81710,0rcu_preempt3-21ksoftirqd/010:42:480
81710,0rcu_preempt18783-21cyclictest10:22:550
81700,0rcu_preempt3-21ksoftirqd/012:12:260
81700,0rcu_preempt3-21ksoftirqd/010:16:470
81690,0rcu_preempt3-21ksoftirqd/012:21:530
81690,0rcu_preempt3-21ksoftirqd/011:59:240
81690,0rcu_preempt3-21ksoftirqd/011:48:590
81690,0rcu_preempt3-21ksoftirqd/011:30:100
81690,0rcu_preempt3-21ksoftirqd/011:26:520
81690,0rcu_preempt3-21ksoftirqd/011:19:100
81690,0rcu_preempt3-21ksoftirqd/010:51:310
81680,0rcu_preempt3-21ksoftirqd/010:35:200
81680,0rcu_preempt3-21ksoftirqd/010:28:320
81680,0rcu_preempt3-21ksoftirqd/010:00:300
81680,0rcu_preempt3-21ksoftirqd/009:45:070
81680,0rcu_preempt19-21ksoftirqd/107:19:481
81670,0rcu_preempt3-21ksoftirqd/011:50:590
81670,0rcu_preempt3-21ksoftirqd/010:55:300
81670,0rcu_preempt19-21ksoftirqd/111:08:441
81660,0rcu_preempt3180-21ssh12:35:121
81660,0rcu_preempt19-21ksoftirqd/109:16:441
81650,0rcu_preempt25788-21diskmemload11:35:100
81650,0rcu_preempt19-21ksoftirqd/108:10:011
81650,0rcu_preempt19-21ksoftirqd/107:39:481
81640,0rcu_preempt19-21ksoftirqd/110:39:481
81630,0rcu_preempt6114-21ntpq11:00:151
81620,0rcu_preempt2559-21ping08:20:000
81610,0rcu_preempt7460-1kworker/0:2H08:15:000
81610,0rcu_preempt3-21ksoftirqd/007:15:000
81610,0rcu_preempt19-21ksoftirqd/112:04:471
81600,0rcu_preempt3-21ksoftirqd/009:20:060
81600,0rcu_preempt3-21ksoftirqd/008:30:070
10050600,0irq/346-48484007875-1kworker/0:1H09:57:450
81590,0rcu_preempt19-21ksoftirqd/109:12:461
81580,0rcu_preempt19-21ksoftirqd/111:59:481
81580,0rcu_preempt19-21ksoftirqd/110:40:161
81570,0rcu_preempt6906-21ntp_states08:10:130
81570,0rcu_preempt3-21ksoftirqd/009:25:060
81570,0rcu_preempt22064-21ping07:45:060
81570,0rcu_preempt19-21ksoftirqd/110:07:381
81570,0rcu_preempt19-21ksoftirqd/109:24:131
81560,0rcu_preempt3-21ksoftirqd/011:09:480
81550,0rcu_preempt19-21ksoftirqd/111:19:491
1878599552,0cyclictest23374-21apt-get09:39:591
81540,0rcu_preempt3-21ksoftirqd/009:05:040
81530,0rcu_preempt19-21ksoftirqd/108:25:011
81530,0rcu_preempt19-21ksoftirqd/108:20:181
1878599532,0cyclictest20349-21if_eth012:20:081
81520,0rcu_preempt3-21ksoftirqd/007:59:490
81520,0rcu_preempt22064-21ping07:40:140
81520,0rcu_preempt19371-21apt-get08:49:580
81520,0rcu_preempt19-21ksoftirqd/110:26:461
81510,0rcu_preempt19-21ksoftirqd/108:59:441
81510,0rcu_preempt1324-21snmpd11:46:311
81500,0rcu_preempt20593-21apt-get10:09:580
1878599501,0cyclictest25788-21diskmemload10:15:031
81490,0rcu_preempt22064-21ping07:34:580
81490,0rcu_preempt21586-21memory08:55:100
81490,0rcu_preempt20512-21kworker/1:111:50:571
1878599492,0cyclictest2577-21apt-get11:29:581
1878599491,0cyclictest2967-21apt-get08:00:011
1878599491,0cyclictest28307-21sh09:45:001
1878599491,0cyclictest25788-21diskmemload11:38:231
1878599491,0cyclictest25788-21diskmemload10:54:581
1878599491,0cyclictest25788-21diskmemload09:24:591
1878599491,0cyclictest16092-21apt-get08:40:011
1878599491,0cyclictest15033-21sh11:41:541
1878499495,0cyclictest0-21swapper/010:45:080
81480,0rcu_preempt3-21ksoftirqd/008:49:000
81480,0rcu_preempt3-21ksoftirqd/008:05:190
81480,0rcu_preempt19-21ksoftirqd/110:09:571
1878599482,0cyclictest4964-21apt-get12:05:031
1878599482,0cyclictest0-21swapper/110:44:591
1878599481,0cyclictest27784-21munin-node1
1878599481,0cyclictest25788-21diskmemload12:13:041
1878599481,0cyclictest25788-21diskmemload10:32:031
1878599481,0cyclictest25788-21diskmemload10:22:511
1878599481,0cyclictest25788-21diskmemload10:00:321
81470,0rcu_preempt3-21ksoftirqd/008:35:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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