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2026-05-16 - 16:16

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 Sat May 16, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811550,0rcu_preempt1470-21runrttasks08:15:381
811470,0rcu_preempt0-21swapper/108:28:281
811280,0rcu_preempt0-21swapper/111:27:121
811230,0rcu_preempt19-21ksoftirqd/110:26:001
811210,0rcu_preempt19-21ksoftirqd/110:58:431
811180,0rcu_preempt19-21ksoftirqd/110:19:431
811170,0rcu_preempt19-21ksoftirqd/111:18:191
811140,0rcu_preempt3484-21diskmemload09:28:291
811120,0rcu_preempt19-21ksoftirqd/112:27:191
811110,0rcu_preempt19-21ksoftirqd/109:23:421
811100,0rcu_preempt19-21ksoftirqd/107:35:241
811090,0rcu_preempt19-21ksoftirqd/109:40:311
811070,0rcu_preempt0-21swapper/109:33:241
811060,0rcu_preempt19-21ksoftirqd/107:43:011
811050,0rcu_preempt19-21ksoftirqd/110:39:521
811050,0rcu_preempt19-21ksoftirqd/108:58:191
811040,0rcu_preempt3-21ksoftirqd/012:18:280
811030,0rcu_preempt19321-21ssh11:34:181
811010,0rcu_preempt3484-21diskmemload10:13:151
811010,0rcu_preempt19-21ksoftirqd/112:33:011
81980,0rcu_preempt19-21ksoftirqd/112:16:021
81980,0rcu_preempt19-21ksoftirqd/111:11:081
81980,0rcu_preempt19-21ksoftirqd/111:11:081
81980,0rcu_preempt19-21ksoftirqd/109:46:131
81950,0rcu_preempt19-21ksoftirqd/110:07:541
81940,0rcu_preempt19588-21ssh09:56:521
81940,0rcu_preempt19-21ksoftirqd/110:53:171
81940,0rcu_preempt19-21ksoftirqd/110:53:171
81940,0rcu_preempt19-21ksoftirqd/107:18:291
81930,0rcu_preempt19-21ksoftirqd/112:28:151
81930,0rcu_preempt19-21ksoftirqd/110:52:111
81920,0rcu_preempt19-21ksoftirqd/112:03:271
81920,0rcu_preempt18852-21ps10:28:271
81900,0rcu_preempt3108-21kworker/1:111:03:541
81900,0rcu_preempt19-21ksoftirqd/108:23:181
81900,0rcu_preempt12621-21ping07:58:011
81890,0rcu_preempt19-21ksoftirqd/111:53:151
81890,0rcu_preempt19-21ksoftirqd/110:43:121
81880,0rcu_preempt19-21ksoftirqd/112:18:201
81880,0rcu_preempt19-21ksoftirqd/109:08:471
81870,0rcu_preempt19-21ksoftirqd/112:13:011
81870,0rcu_preempt19-21ksoftirqd/111:13:111
81870,0rcu_preempt19-21ksoftirqd/108:48:001
81870,0rcu_preempt19-21ksoftirqd/108:48:001
81860,0rcu_preempt19-21ksoftirqd/111:29:371
81850,0rcu_preempt19-21ksoftirqd/111:58:111
81850,0rcu_preempt19-21ksoftirqd/111:58:111
81810,0rcu_preempt19-21ksoftirqd/111:38:221
81810,0rcu_preempt19-21ksoftirqd/108:53:001
81810,0rcu_preempt19-21ksoftirqd/107:08:231
81790,0rcu_preempt19-21ksoftirqd/109:48:201
81790,0rcu_preempt19-21ksoftirqd/109:13:141
81790,0rcu_preempt19-21ksoftirqd/108:08:231
81770,0rcu_preempt19-21ksoftirqd/109:58:231
81770,0rcu_preempt19-21ksoftirqd/108:53:011
81750,0rcu_preempt19-21ksoftirqd/107:58:281
81740,0rcu_preempt19-21ksoftirqd/109:22:011
166732740,0chrt9950irq/345-484840010:58:430
81720,0rcu_preempt19-21ksoftirqd/111:48:581
81720,0rcu_preempt19-21ksoftirqd/110:34:231
81720,0rcu_preempt19-21ksoftirqd/110:13:011
81710,0rcu_preempt8120-21apt-get07:43:131
81690,0rcu_preempt19-21ksoftirqd/109:03:151
81690,0rcu_preempt19-21ksoftirqd/107:48:181
81690,0rcu_preempt0-21swapper/111:43:231
81680,0rcu_preempt19-21ksoftirqd/108:19:561
81680,0rcu_preempt19-21ksoftirqd/108:07:061
81670,0rcu_preempt54-21kswapd010:12:290
2889599672,0cyclictest4035-21dropbear09:08:170
81660,0rcu_preempt19-21ksoftirqd/107:28:121
81630,0rcu_preempt19-21ksoftirqd/107:24:471
81630,0rcu_preempt19-21ksoftirqd/107:24:471
81620,0rcu_preempt19-21ksoftirqd/107:13:231
81620,0rcu_preempt19-21ksoftirqd/107:13:231
2889599623,0cyclictest28056-21memory11:43:260
2889599621,0cyclictest12631-21kworker/0:007:58:190
2889599618,0cyclictest30067-21apt-get11:13:110
2889599612,0cyclictest0-21swapper/011:23:290
2889599601,0cyclictest0-21swapper/011:03:120
2889599601,0cyclictest0-21swapper/010:05:400
2889599593,0cyclictest13455-1kworker/0:0H09:50:570
2889599592,0cyclictest8079-21ssh11:56:120
2889599592,0cyclictest29772-21ssh09:33:340
2889599588,0cyclictest851-21rngd10:30:460
2889599584,0cyclictest0-21swapper/009:15:230
2889599582,0cyclictest0-21swapper/010:45:310
81570,0rcu_preempt19409-21ntp_states09:23:240
81570,0rcu_preempt19-21ksoftirqd/108:38:181
2889599573,0cyclictest0-21swapper/012:32:350
2889599573,0cyclictest0-21swapper/010:39:120
2889599572,0cyclictest4090-1kworker/0:3H12:34:040
2889599572,0cyclictest15602sleep009:00:000
2889599571,0cyclictest18394-1kworker/0:1H09:58:260
2889599571,0cyclictest11526-21ssh10:21:230
2889599571,0cyclictest0-21swapper/011:58:310
2889599571,0cyclictest0-21swapper/011:58:310
2889599566,0cyclictest20628-1kworker/0:1H10:35:200
2889599566,0cyclictest0-21swapper/010:50:370
2889599565,0cyclictest0-21swapper/012:24:050
2889599564,0cyclictest0-21swapper/011:36:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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