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2025-12-09 - 22:11

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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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 Tue Dec 09, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt19-21ksoftirqd/111:56:501
81980,0rcu_preempt3-21ksoftirqd/009:56:200
226352980,0sleep010050irq/346-484840008:00:140
81970,0rcu_preempt9366-21apt-get11:19:311
81950,0rcu_preempt3-21ksoftirqd/010:26:480
81940,0rcu_preempt29101-21df12:29:351
81930,0rcu_preempt0-21swapper/110:30:381
81920,0rcu_preempt19-21ksoftirqd/109:15:191
81910,0rcu_preempt19-21ksoftirqd/112:24:441
81860,0rcu_preempt19-21ksoftirqd/110:08:041
81840,0rcu_preempt0-21swapper/109:58:331
81830,0rcu_preempt16736-21ssh11:29:261
81820,0rcu_preempt19-21ksoftirqd/112:36:201
81820,0rcu_preempt19-21ksoftirqd/110:36:521
81810,0rcu_preempt19-21ksoftirqd/109:29:431
81810,0rcu_preempt0-21swapper/112:16:571
81800,0rcu_preempt8117-21meminfo09:49:441
81790,0rcu_preempt19-21ksoftirqd/110:20:231
9950780,0irq/345-4848400111rcuc/010:59:400
81770,0rcu_preempt9844-21kworker/1:211:39:421
81760,0rcu_preempt3-21ksoftirqd/011:36:210
272292750,0sleep010050irq/346-484840008:14:500
10050750,0irq/346-484840041ktimersoftd/011:14:530
10050750,0irq/346-4848400111rcuc/009:33:020
9950740,0irq/345-4848400111rcuc/012:09:270
81740,0rcu_preempt751-21rngd08:19:280
10050740,0irq/346-4848400111rcuc/009:16:090
81730,0rcu_preempt0-21swapper/012:34:030
10050730,0irq/346-484840041ktimersoftd/009:47:570
9950720,0irq/345-484840041ktimersoftd/010:44:380
9950720,0irq/345-4848400111rcuc/010:39:230
81720,0rcu_preempt19-21ksoftirqd/111:59:391
10050720,0irq/346-4848400111rcuc/012:22:320
10050720,0irq/346-4848400111rcuc/011:55:080
10050720,0irq/346-4848400111rcuc/011:08:490
10050710,0irq/346-484840041ktimersoftd/010:50:440
10050710,0irq/346-4848400111rcuc/011:51:530
502799702,0cyclictest0-21swapper/009:19:240
10050700,0irq/346-484840041ktimersoftd/009:49:400
9950690,0irq/345-484840041ktimersoftd/011:23:240
9950690,0irq/345-4848400111rcuc/009:27:550
81690,0rcu_preempt3-21ksoftirqd/010:05:570
81690,0rcu_preempt22528-1kworker/0:0H10:54:390
81690,0rcu_preempt19-21ksoftirqd/112:09:411
81690,0rcu_preempt19-21ksoftirqd/110:56:471
4350690,0irq/32-4330000041ktimersoftd/009:04:430
10050690,0irq/346-4848400111rcuc/008:13:270
9950670,0irq/345-4848400111rcuc/010:30:300
10050670,0irq/346-4848400111rcuc/012:28:530
10050670,0irq/346-4848400111rcuc/011:10:380
9950660,0irq/345-4848400111rcuc/012:19:180
81660,0rcu_preempt3-21ksoftirqd/008:39:410
81660,0rcu_preempt19-21ksoftirqd/111:05:201
502799662,0cyclictest0-21swapper/007:27:510
81650,0rcu_preempt9844-21kworker/1:211:01:171
81650,0rcu_preempt1153-21grep09:39:461
502799651,0cyclictest8299-21ping07:19:210
244242650,0sleep010050irq/346-484840008:06:560
81640,0rcu_preempt3-21ksoftirqd/008:54:390
81640,0rcu_preempt3-21ksoftirqd/008:34:360
81640,0rcu_preempt19-21ksoftirqd/108:19:391
502799632,0cyclictest29755-1kworker/0:1H08:24:350
81620,0rcu_preempt3-21ksoftirqd/010:14:300
502799622,0cyclictest1369-21runrttasks09:10:260
502799622,0cyclictest12410-21runrttasks07:29:510
502799621,0cyclictest29495-21runrttasks11:46:520
311052620,0sleep19950irq/345-484840011:49:251
125392610,0sleep09950irq/345-484840012:06:410
81600,0rcu_preempt19-21ksoftirqd/111:17:401
81600,0rcu_preempt19-21ksoftirqd/111:12:551
81600,0rcu_preempt19-21ksoftirqd/110:10:501
502799602,0cyclictest21374-21idleruntime-cro07:59:180
81590,0rcu_preempt19-21ksoftirqd/110:27:411
502799591,0cyclictest8299-21ping07:19:200
81580,0rcu_preempt19-21ksoftirqd/110:19:101
502799582,0cyclictest0-21swapper/010:04:190
81570,0rcu_preempt3-21ksoftirqd/011:29:300
81570,0rcu_preempt3-21ksoftirqd/010:19:300
81570,0rcu_preempt19-21ksoftirqd/110:41:391
81570,0rcu_preempt19-21ksoftirqd/107:19:201
502799572,0cyclictest0-21swapper/009:39:210
502799569,0cyclictest13387-1kworker/0:1H07:34:530
502799566,0cyclictest0-21swapper/011:43:260
502799563,0cyclictest10050irq/346-484840010:11:220
502799554,0cyclictest0-21swapper/009:34:580
502799551,0cyclictest8299-21ping07:39:220
81540,0rcu_preempt3-21ksoftirqd/008:29:290
81540,0rcu_preempt19-21ksoftirqd/107:59:321
81530,0rcu_preempt19-21ksoftirqd/107:19:241
81520,0rcu_preempt3876-21apt-get08:44:310
81520,0rcu_preempt3-21ksoftirqd/008:59:360
81520,0rcu_preempt19-21ksoftirqd/107:29:531
132262520,0sleep19950irq/345-484840012:07:541
10050520,0irq/346-484840054-21kswapd012:34:490
81510,0rcu_preempt19-21ksoftirqd/108:54:411
502799514,0cyclictest0-21swapper/011:26:330
81500,0rcu_preempt3-21ksoftirqd/012:00:590
81500,0rcu_preempt19-21ksoftirqd/108:59:431
81490,0rcu_preempt3-21ksoftirqd/010:34:450
81490,0rcu_preempt19-21ksoftirqd/110:48:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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