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2025-12-12 - 11:04

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 Fri Dec 12, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811590,0rcu_preempt19-21ksoftirqd/122:33:291
811160,0rcu_preempt19-21ksoftirqd/121:49:331
811140,0rcu_preempt19-21ksoftirqd/119:59:491
811120,0rcu_preempt54-21kswapd000:09:351
811070,0rcu_preempt54-21kswapd000:03:461
811070,0rcu_preempt3-21ksoftirqd/021:39:450
811070,0rcu_preempt15890-1kworker/1:5H22:25:411
811070,0rcu_preempt15890-1kworker/1:5H22:25:411
811040,0rcu_preempt19-21ksoftirqd/119:37:341
811040,0rcu_preempt0-21swapper/123:44:571
811030,0rcu_preempt54-21kswapd023:19:521
811030,0rcu_preempt19-21ksoftirqd/121:14:381
811030,0rcu_preempt19-21ksoftirqd/120:16:401
811010,0rcu_preempt19-21ksoftirqd/100:29:511
811010,0rcu_preempt19-21ksoftirqd/100:14:591
811000,0rcu_preempt751-21rngd22:05:201
811000,0rcu_preempt19-21ksoftirqd/123:05:551
811000,0rcu_preempt19-21ksoftirqd/122:15:051
811000,0rcu_preempt19-21ksoftirqd/122:11:171
81990,0rcu_preempt19-21ksoftirqd/123:53:511
81970,0rcu_preempt54-21kswapd023:35:031
81970,0rcu_preempt54-21kswapd023:35:031
81970,0rcu_preempt54-21kswapd021:25:091
81970,0rcu_preempt19-21ksoftirqd/120:44:321
81960,0rcu_preempt19-21ksoftirqd/123:31:321
81960,0rcu_preempt19-21ksoftirqd/123:31:321
81960,0rcu_preempt19-21ksoftirqd/123:27:131
81960,0rcu_preempt19-21ksoftirqd/122:34:391
81950,0rcu_preempt19-21ksoftirqd/120:22:431
81930,0rcu_preempt751-21rngd20:25:571
81930,0rcu_preempt19-21ksoftirqd/122:39:281
81920,0rcu_preempt19-21ksoftirqd/100:34:451
81920,0rcu_preempt19-21ksoftirqd/100:19:321
81900,0rcu_preempt19-21ksoftirqd/123:39:391
81890,0rcu_preempt19-21ksoftirqd/123:15:561
81880,0rcu_preempt19-21ksoftirqd/122:59:161
81880,0rcu_preempt19-21ksoftirqd/122:23:171
81880,0rcu_preempt19-21ksoftirqd/121:57:391
81880,0rcu_preempt19-21ksoftirqd/121:44:471
81880,0rcu_preempt19-21ksoftirqd/100:07:121
81860,0rcu_preempt19-21ksoftirqd/122:44:441
81850,0rcu_preempt19-21ksoftirqd/121:31:181
81850,0rcu_preempt19-21ksoftirqd/100:24:481
81840,0rcu_preempt19-21ksoftirqd/123:54:261
81830,0rcu_preempt19-21ksoftirqd/121:22:121
81820,0rcu_preempt19-21ksoftirqd/123:12:161
81820,0rcu_preempt19-21ksoftirqd/121:09:161
81800,0rcu_preempt19-21ksoftirqd/120:11:491
81800,0rcu_preempt19-21ksoftirqd/119:58:001
81800,0rcu_preempt19-21ksoftirqd/119:24:161
81780,0rcu_preempt19-21ksoftirqd/119:29:301
81770,0rcu_preempt19-21ksoftirqd/122:02:311
81770,0rcu_preempt19-21ksoftirqd/121:34:261
81770,0rcu_preempt19-21ksoftirqd/121:10:491
81770,0rcu_preempt19-21ksoftirqd/120:05:321
81770,0rcu_preempt19-21ksoftirqd/119:39:471
81750,0rcu_preempt751-21rngd22:49:331
81750,0rcu_preempt29457-21kworker/1:120:54:421
81750,0rcu_preempt19-21ksoftirqd/121:39:321
81750,0rcu_preempt19-21ksoftirqd/119:25:051
81750,0rcu_preempt19-21ksoftirqd/119:25:051
108442740,0sleep010050irq/346-484840020:25:270
81730,0rcu_preempt28509-21kworker/1:222:59:441
81730,0rcu_preempt19-21ksoftirqd/119:45:431
81730,0rcu_preempt19-21ksoftirqd/119:14:401
81720,0rcu_preempt19-21ksoftirqd/120:41:061
81720,0rcu_preempt19-21ksoftirqd/120:38:571
81720,0rcu_preempt19-21ksoftirqd/120:32:251
107062710,0chrt9950irq/345-484840021:32:410
81700,0rcu_preempt19-21ksoftirqd/120:50:581
81690,0rcu_preempt19-21ksoftirqd/119:52:441
17429996915,0cyclictest5103-21apt-get22:49:310
81680,0rcu_preempt19-21ksoftirqd/120:59:421
81680,0rcu_preempt19-21ksoftirqd/119:09:411
1742999669,0cyclictest0-21swapper/023:38:210
1742999669,0cyclictest0-21swapper/023:38:210
1742999641,0cyclictest26676-1kworker/0:3H23:19:220
1742999639,0cyclictest0-21swapper/021:44:490
1742999638,0cyclictest7982-21latency_hist20:19:170
1742999632,0cyclictest0-21swapper/023:53:190
95262620,0chrt10050irq/346-484840020:23:480
1742999627,0cyclictest22726-1kworker/0:2H23:14:470
1742999623,0cyclictest0-21swapper/023:44:280
1742999621,0cyclictest10016-1kworker/0:0H23:39:220
81610,0rcu_preempt3-21ksoftirqd/022:06:530
1742999618,0cyclictest22726-1kworker/0:2H23:12:280
1742999617,0cyclictest11666-21taskset22:15:060
1742999613,0cyclictest0-21swapper/022:54:300
1742999611,0cyclictest20788-1kworker/0:2H20:59:180
81600,0rcu_preempt3-21ksoftirqd/000:29:510
1742999603,0cyclictest20706-21ping19:33:270
1742999602,0cyclictest0-21swapper/022:31:110
1742999602,0cyclictest0-21swapper/000:19:290
1742999595,0cyclictest0-21swapper/019:42:210
1742999592,0cyclictest0-21swapper/000:14:570
1742999591,0cyclictest8589-21sshd22:11:300
1742999591,0cyclictest26817-1kworker/0:1H21:14:030
1742999591,0cyclictest10050irq/346-484840023:28:570
1742999591,0cyclictest0-21swapper/020:29:270
1742999584,0cyclictest3-21ksoftirqd/019:19:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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