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2026-09-08 - 08:27

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 highest latencies:
System rackaslot5s.osadl.org (updated Tue Sep 08, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811020,0rcu_preempt3-21ksoftirqd/023:56:310
81940,0rcu_preempt19-21ksoftirqd/122:28:471
10050920,0irq/346-48484006996-1kworker/0:1H21:15:320
81900,0rcu_preempt3-21ksoftirqd/021:25:210
81900,0rcu_preempt3-21ksoftirqd/021:25:210
81810,0rcu_preempt19-21ksoftirqd/119:39:231
81770,0rcu_preempt19-21ksoftirqd/100:04:451
81690,0rcu_preempt3-21ksoftirqd/022:54:340
81690,0rcu_preempt3-21ksoftirqd/020:49:400
81680,0rcu_preempt54-21kswapd021:11:151
81670,0rcu_preempt3-21ksoftirqd/021:09:510
81670,0rcu_preempt19-21ksoftirqd/122:19:241
81660,0rcu_preempt3-21ksoftirqd/023:33:180
81640,0rcu_preempt3-21ksoftirqd/022:44:340
81640,0rcu_preempt3-21ksoftirqd/022:37:420
81610,0rcu_preempt54-21kswapd020:49:421
81610,0rcu_preempt3-21ksoftirqd/022:25:540
10050610,0irq/346-484840030244-1kworker/0:0H23:44:490
81600,0rcu_preempt19-21ksoftirqd/121:44:191
81590,0rcu_preempt3-21ksoftirqd/023:00:150
81590,0rcu_preempt3-21ksoftirqd/021:50:330
81590,0rcu_preempt19-21ksoftirqd/119:52:071
81580,0rcu_preempt3-21ksoftirqd/021:39:260
10050580,0irq/346-484840010096-1kworker/0:0H22:16:570
10050580,0irq/346-484840010096-1kworker/0:0H22:16:570
81570,0rcu_preempt4820-21kworker/1:022:01:221
81570,0rcu_preempt3-21ksoftirqd/000:00:290
81560,0rcu_preempt3-21ksoftirqd/019:44:530
10050560,0irq/346-484840054-21kswapd021:57:551
10050550,0irq/346-48484005103-1kworker/0:1H22:40:570
10050550,0irq/346-484840022463-1kworker/0:0H22:04:070
81540,0rcu_preempt3-21ksoftirqd/022:11:270
99812530,0chrt10050irq/346-484840019:37:460
81530,0rcu_preempt9950irq/345-484840021:36:031
81530,0rcu_preempt19-21ksoftirqd/121:20:021
81520,0rcu_preempt9950irq/345-484840022:59:221
81520,0rcu_preempt19-21ksoftirqd/123:46:021
10050520,0irq/346-484840054-21kswapd023:49:420
10050520,0irq/346-484840054-21kswapd023:16:230
10050520,0irq/346-484840054-21kswapd021:57:070
10050520,0irq/346-48484005281-1kworker/0:2H23:25:140
81510,0rcu_preempt3-21ksoftirqd/021:29:430
81510,0rcu_preempt3-21ksoftirqd/000:19:500
81510,0rcu_preempt3-21ksoftirqd/000:14:330
10050510,0irq/346-48484003593-21ping19:21:170
10050510,0irq/346-484840027678-1kworker/0:1H23:21:430
82912500,0chrt10050irq/346-484840019:32:090
81500,0rcu_preempt3-21ksoftirqd/023:37:100
81500,0rcu_preempt3-21ksoftirqd/020:29:330
81500,0rcu_preempt19-21ksoftirqd/100:31:361
10050500,0irq/346-4848400836-21rngd21:47:090
10050500,0irq/346-484840032712-21cyclictest23:14:080
81490,0rcu_preempt836-21rngd22:29:410
81490,0rcu_preempt3-21ksoftirqd/000:29:230
10050490,0irq/346-484840032482-1kworker/0:3H22:08:570
10050490,0irq/346-484840017308-21ssh00:34:230
10050490,0irq/346-48484001324-21snmpd23:40:250
81480,0rcu_preempt3-21ksoftirqd/021:04:410
81480,0rcu_preempt3-21ksoftirqd/000:24:440
81480,0rcu_preempt19-21ksoftirqd/119:30:311
3271399481,0cyclictest3593-21ping19:39:250
10050480,0irq/346-484840032493-21ssh21:34:360
10050480,0irq/346-484840022697-1kworker/0:0H23:06:330
10050480,0irq/346-48484000-21swapper/022:23:330
81470,0rcu_preempt3-21ksoftirqd/019:54:340
10050470,0irq/346-484840054-21kswapd021:46:331
81460,0rcu_preempt16481-21ping20:24:480
10050460,0irq/346-48484009973-1kworker/0:0H21:19:280
10050460,0irq/346-48484000-21swapper/022:50:140
81450,0rcu_preempt4167-21apt-get20:59:360
81450,0rcu_preempt3-21ksoftirqd/019:59:480
81450,0rcu_preempt30738-21processes20:39:480
81450,0rcu_preempt19-21ksoftirqd/100:19:341
81450,0rcu_preempt16481-21ping20:09:350
10050450,0irq/346-484840029825-21munin-run20:39:230
10050450,0irq/346-48484002835-1kworker/0:1H00:12:500
81440,0rcu_preempt3-21ksoftirqd/020:44:390
81440,0rcu_preempt19-21ksoftirqd/122:45:171
81440,0rcu_preempt16481-21ping20:19:460
10050440,0irq/346-484840054-21kswapd000:05:110
81430,0rcu_preempt3-21ksoftirqd/020:14:230
81430,0rcu_preempt3-21ksoftirqd/020:14:230
81430,0rcu_preempt3-21ksoftirqd/019:14:380
81430,0rcu_preempt3-21ksoftirqd/019:04:410
81430,0rcu_preempt19459-21grep20:04:530
10050430,0irq/346-48484000-21swapper/123:12:581
81420,0rcu_preempt19-21ksoftirqd/122:09:371
3271399421,0cyclictest3593-21ping19:24:340
10050410,0irq/346-48484001942-21munin-run19:14:220
10050410,0irq/346-484840015060-21runrttasks19:54:230
31932400,0sleep02059-1kworker/0:0H20:54:460
10050390,0irq/346-484840012039-1kworker/1:2H23:59:101
10050380,0irq/346-484840017453-1kworker/1:1H21:54:171
10050370,0irq/346-484840029978-21ssh22:04:351
9950360,0irq/345-484840016699-21munin-run19:59:221
9950360,0irq/345-484840012603-21ssh22:51:311
81360,0rcu_preempt19-21ksoftirqd/122:37:541
81360,0rcu_preempt19-21ksoftirqd/100:12:521
1699360,0migration/113200-21irqstats23:24:441
10050360,0irq/346-484840032039-21ls19:04:461
10050360,0irq/346-484840022040-1kworker/1:2H00:14:391
9950350,0irq/345-484840025058-21apt-get23:04:341
81350,0rcu_preempt19-21ksoftirqd/121:34:001
81350,0rcu_preempt19-21ksoftirqd/100:37:061
1699350,0migration/119009-21runrttasks00:03:231
10050350,0irq/346-48484005453-21fschecks_count23:49:431
10050350,0irq/346-484840023230-21rm23:34:431
10050350,0irq/346-484840022947-1kworker/1:1H20:19:471
10050350,0irq/346-484840019970-1kworker/1:3H23:14:341
10050350,0irq/346-48484000-21swapper/123:40:041
81340,0rcu_preempt19-21ksoftirqd/123:02:391
4350340,0irq/32-43300000615-21dropbear19:09:391
1699340,0migration/123844-21sh21:24:581
1699340,0migration/123844-21sh21:24:581
10050340,0irq/346-4848400171rcuc/122:14:381
10050340,0irq/346-4848400171rcuc/122:14:381
9950330,0irq/345-484840026313-21taskset20:26:581
9950330,0irq/345-484840022410-21ntp_kernel_err20:14:491
9950330,0irq/345-484840022410-21ntp_kernel_err20:14:491
9950330,0irq/345-484840014748-21chrt21:16:061
9950330,0irq/345-48484000-21swapper/119:19:241
81330,0rcu_preempt19-21ksoftirqd/119:19:261
66442330,0sleep16558-1kworker/1:1H19:27:011
295812330,0chrt29519-1kworker/1:3H20:36:561
10050330,0irq/346-48484009824-1kworker/1:1H19:39:251
10050330,0irq/346-48484007741-21df00:24:361
10050330,0irq/346-48484007510-21latency_hist23:19:241
10050330,0irq/346-484840021193-21ssh23:32:581
10050330,0irq/346-484840018042-1kworker/1:3H20:04:221
10050330,0irq/346-48484000-21swapper/122:42:211
10050330,0irq/346-48484000-21swapper/120:29:341
9950320,0irq/345-484840027225-21ssh22:34:221
10050320,0irq/346-48484003996-21munin-run20:59:221
10050320,0irq/346-484840021470-21taskset20:12:521
10050320,0irq/346-484840019973-21cron20:09:221
9950310,0irq/345-484840029959-21cat20:39:241
9950310,0irq/345-48484000-21swapper/121:04:451
10050310,0irq/346-48484000-21swapper/120:59:501
10050280,0irq/346-4848400360-1kworker/1:0H20:46:181
10050280,0irq/346-48484003593-21ping19:44:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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