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2026-05-04 - 11:49

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 792 highest latencies:
System rackaslot5s.osadl.org (updated Mon May 04, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811030,0rcu_preempt19-21ksoftirqd/123:57:361
811030,0rcu_preempt19-21ksoftirqd/123:57:361
81880,0rcu_preempt19-21ksoftirqd/100:16:561
10050850,0irq/346-4848400111rcuc/023:32:550
81830,0rcu_preempt19-21ksoftirqd/122:59:511
81820,0rcu_preempt5403-21diskmemload23:27:351
81770,0rcu_preempt3-21ksoftirqd/022:53:350
10050760,0irq/346-4848400111rcuc/023:20:320
81740,0rcu_preempt3-21ksoftirqd/000:31:210
81730,0rcu_preempt19-21ksoftirqd/122:18:401
81720,0rcu_preempt19-21ksoftirqd/122:38:371
81710,0rcu_preempt3-21ksoftirqd/021:16:590
30839997126,0cyclictest2436-21runrttasks22:09:480
81690,0rcu_preempt3-21ksoftirqd/022:13:290
81690,0rcu_preempt3-21ksoftirqd/022:02:230
81690,0rcu_preempt3-21ksoftirqd/000:23:350
9950680,0irq/345-484840041ktimersoftd/021:40:140
81680,0rcu_preempt3-21ksoftirqd/021:34:040
81680,0rcu_preempt3-21ksoftirqd/000:13:130
3083999684,0cyclictest0-21swapper/022:36:040
9950670,0irq/345-484840041ktimersoftd/022:38:390
30839996727,0cyclictest22621-21sendmail-msp21:58:120
9950660,0irq/345-4848400111rcuc/022:06:040
3083999666,0cyclictest0-21swapper/022:45:230
3083999663,0cyclictest0-21swapper/023:33:370
30839996627,0cyclictest21678-21ssh23:02:300
3083999662,0cyclictest0-21swapper/000:21:420
81650,0rcu_preempt19-21ksoftirqd/120:08:371
3083999656,0cyclictest0-21swapper/021:46:560
30839996521,0cyclictest0-21swapper/023:23:320
3083999652,0cyclictest13753-21ssh21:48:360
3083999647,0cyclictest0-21swapper/023:45:400
3083999647,0cyclictest0-21swapper/023:45:400
3083999643,0cyclictest0-21swapper/021:20:180
81630,0rcu_preempt19-21ksoftirqd/121:09:271
81630,0rcu_preempt19-21ksoftirqd/121:09:271
81630,0rcu_preempt19-21ksoftirqd/100:05:401
81630,0rcu_preempt19-21ksoftirqd/100:05:401
3083999635,0cyclictest29566-21192.168.115.60-23:09:480
3083999632,0cyclictest16892-21idleruntime20:03:290
46732620,0chrt10050irq/346-484840019:24:540
46732620,0chrt10050irq/346-484840019:24:540
3083999622,0cyclictest7565-21ssh22:48:180
81600,0rcu_preempt14601-21ping20:03:130
3083999607,0cyclictest0-21swapper/023:42:330
81590,0rcu_preempt19-21ksoftirqd/122:17:381
4350590,0irq/32-4330000012420-21dropbear23:58:260
3083999596,0cyclictest15847-21latency22:23:320
3083999595,0cyclictest0-21swapper/021:10:510
3083999595,0cyclictest0-21swapper/021:10:510
3083999591,0cyclictest0-21swapper/022:21:010
81580,0rcu_preempt3-21ksoftirqd/023:03:310
3083999585,0cyclictest10050irq/346-484840023:57:490
3083999585,0cyclictest10050irq/346-484840023:57:490
30839995823,0cyclictest0-21swapper/022:33:110
3083999582,0cyclictest4053-21ssh23:17:230
3083999577,0cyclictest0-21swapper/000:35:410
3083999572,0cyclictest0-21swapper/021:33:060
81560,0rcu_preempt19-21ksoftirqd/120:13:341
81560,0rcu_preempt10050irq/346-484840019:38:320
3083999562,0cyclictest21797-21ssh21:23:400
81550,0rcu_preempt19-21ksoftirqd/100:33:401
81550,0rcu_preempt18465-21kworker/0:020:10:160
81550,0rcu_preempt0-21swapper/122:46:591
3083999551,0cyclictest9896-1kworker/0:2H19:48:290
81540,0rcu_preempt3-21ksoftirqd/020:53:310
81540,0rcu_preempt19-21ksoftirqd/123:37:451
81540,0rcu_preempt19-21ksoftirqd/123:12:021
81540,0rcu_preempt19-21ksoftirqd/119:03:271
81540,0rcu_preempt0-21swapper/123:03:541
81530,0rcu_preempt3-21ksoftirqd/023:48:230
3083999537,0cyclictest54-21kswapd020:18:320
81520,0rcu_preempt3-21ksoftirqd/020:28:350
81510,0rcu_preempt3-21ksoftirqd/019:03:330
81510,0rcu_preempt19-21ksoftirqd/123:19:491
81510,0rcu_preempt0-21swapper/121:25:071
3083999514,0cyclictest0-21swapper/019:33:310
30839995123,0cyclictest10335-21sed19:43:300
81500,0rcu_preempt3-21ksoftirqd/020:33:360
81500,0rcu_preempt19-21ksoftirqd/123:38:391
81490,0rcu_preempt3-21ksoftirqd/020:58:300
81490,0rcu_preempt3-21ksoftirqd/020:23:280
81490,0rcu_preempt3-21ksoftirqd/000:03:340
81490,0rcu_preempt3-21ksoftirqd/000:03:340
81480,0rcu_preempt3-21ksoftirqd/000:09:330
81480,0rcu_preempt12591-21ssh22:53:231
81470,0rcu_preempt3-21ksoftirqd/021:03:370
81470,0rcu_preempt19-21ksoftirqd/121:18:371
81460,0rcu_preempt54-21kswapd019:57:240
81460,0rcu_preempt3-21ksoftirqd/020:48:290
81460,0rcu_preempt3-21ksoftirqd/020:43:360
81460,0rcu_preempt3-21ksoftirqd/020:13:340
81460,0rcu_preempt19-21ksoftirqd/122:12:321
81460,0rcu_preempt19-21ksoftirqd/120:24:241
81450,0rcu_preempt19-21ksoftirqd/121:42:301
81450,0rcu_preempt19-21ksoftirqd/121:28:331
81450,0rcu_preempt19-21ksoftirqd/121:13:361
81450,0rcu_preempt19-21ksoftirqd/100:28:421
81450,0rcu_preempt17292-21kworker/0:019:13:390
81450,0rcu_preempt0-21swapper/121:36:001
81440,0rcu_preempt19-21ksoftirqd/121:58:331
81440,0rcu_preempt19-21ksoftirqd/121:43:381
81440,0rcu_preempt19-21ksoftirqd/120:18:371
81440,0rcu_preempt19-21ksoftirqd/120:03:371
81440,0rcu_preempt19-21ksoftirqd/100:08:311
81430,0rcu_preempt3-21ksoftirqd/019:08:270
81430,0rcu_preempt30838-21cyclictest23:31:041
81430,0rcu_preempt19-21ksoftirqd/123:59:081
81430,0rcu_preempt19-21ksoftirqd/123:45:321
81430,0rcu_preempt19-21ksoftirqd/123:45:321
81430,0rcu_preempt19-21ksoftirqd/122:27:561
81430,0rcu_preempt19-21ksoftirqd/121:53:311
81430,0rcu_preempt19-21ksoftirqd/119:58:301
81420,0rcu_preempt3-21ksoftirqd/020:38:370
81420,0rcu_preempt3-21ksoftirqd/020:38:370
81420,0rcu_preempt19-21ksoftirqd/122:48:361
81420,0rcu_preempt19-21ksoftirqd/122:34:401
81420,0rcu_preempt19-21ksoftirqd/122:03:231
81420,0rcu_preempt19-21ksoftirqd/119:43:301
81420,0rcu_preempt19-21ksoftirqd/100:25:481
81410,0rcu_preempt19-21ksoftirqd/120:58:491
81410,0rcu_preempt19-21ksoftirqd/119:38:381
81410,0rcu_preempt19-21ksoftirqd/100:19:451
81410,0rcu_preempt1709-21ping19:18:230
81400,0rcu_preempt19-21ksoftirqd/121:50:511
81400,0rcu_preempt19-21ksoftirqd/120:39:201
81400,0rcu_preempt19-21ksoftirqd/120:39:201
81400,0rcu_preempt19-21ksoftirqd/119:33:371
81400,0rcu_preempt19-21ksoftirqd/119:30:131
81390,0rcu_preempt3-21ksoftirqd/019:28:280
81390,0rcu_preempt19-21ksoftirqd/122:28:341
81390,0rcu_preempt19-21ksoftirqd/121:06:491
81390,0rcu_preempt19-21ksoftirqd/120:58:061
81390,0rcu_preempt19-21ksoftirqd/120:43:241
81390,0rcu_preempt19-21ksoftirqd/119:56:471
81390,0rcu_preempt19-21ksoftirqd/119:17:421
81380,0rcu_preempt19-21ksoftirqd/123:52:371
81380,0rcu_preempt19-21ksoftirqd/123:13:411
81380,0rcu_preempt19-21ksoftirqd/120:52:121
81380,0rcu_preempt19-21ksoftirqd/119:23:411
81380,0rcu_preempt19-21ksoftirqd/119:23:411
81370,0rcu_preempt19-21ksoftirqd/120:33:421
81370,0rcu_preempt19-21ksoftirqd/120:31:001
81370,0rcu_preempt19-21ksoftirqd/119:18:451
81370,0rcu_preempt19-21ksoftirqd/119:13:131
81360,0rcu_preempt19-21ksoftirqd/119:52:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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