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2025-06-16 - 20:05

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 all highest latencies:
System rackaslot5s.osadl.org (updated Mon Jun 16, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811300,0rcu_preempt3-21ksoftirqd/012:27:330
81780,0rcu_preempt19-21ksoftirqd/109:18:421
81760,0rcu_preempt19-21ksoftirqd/110:41:121
9950750,0irq/345-4848400171rcuc/111:50:471
81750,0rcu_preempt32090-21kworker/1:207:42:391
10050750,0irq/346-4848400171rcuc/110:05:481
81710,0rcu_preempt19-21ksoftirqd/111:21:521
10050710,0irq/346-4848400171rcuc/110:57:061
81700,0rcu_preempt3-21ksoftirqd/012:17:060
81690,0rcu_preempt3-21ksoftirqd/010:14:500
81690,0rcu_preempt19-21ksoftirqd/110:26:001
81680,0rcu_preempt54-21kswapd012:28:151
81680,0rcu_preempt54-21kswapd012:17:100
81680,0rcu_preempt19-21ksoftirqd/112:11:271
81680,0rcu_preempt19-21ksoftirqd/111:02:211
81680,0rcu_preempt19-21ksoftirqd/109:58:271
81660,0rcu_preempt9265-21ssh11:42:231
81660,0rcu_preempt3-21ksoftirqd/010:56:240
81660,0rcu_preempt19-21ksoftirqd/112:18:541
10050660,0irq/346-4848400171rcuc/111:59:081
81650,0rcu_preempt3-21ksoftirqd/007:52:290
81650,0rcu_preempt19-21ksoftirqd/111:27:221
10050650,0irq/346-484840025935-1kworker/0:2H09:52:270
81640,0rcu_preempt3-21ksoftirqd/012:33:540
81640,0rcu_preempt3-21ksoftirqd/009:12:300
81640,0rcu_preempt20706-21cyclictest09:47:410
239752640,0chrt9950irq/345-484840007:17:060
10050640,0irq/346-4848400181ktimersoftd/111:35:281
10050640,0irq/346-4848400171rcuc/109:16:141
81630,0rcu_preempt19-21ksoftirqd/109:23:541
10050630,0irq/346-4848400171rcuc/109:52:151
81620,0rcu_preempt3-21ksoftirqd/012:12:070
81620,0rcu_preempt19-21ksoftirqd/112:24:521
81620,0rcu_preempt19-21ksoftirqd/112:03:001
81620,0rcu_preempt19-21ksoftirqd/111:11:081
81620,0rcu_preempt19-21ksoftirqd/109:27:261
81620,0rcu_preempt19-21ksoftirqd/109:27:261
81620,0rcu_preempt19-21ksoftirqd/108:07:381
10050620,0irq/346-4848400181ktimersoftd/109:34:101
81610,0rcu_preempt19-21ksoftirqd/111:26:041
81610,0rcu_preempt19-21ksoftirqd/109:44:481
10050610,0irq/346-484840054-21kswapd008:02:221
81600,0rcu_preempt19-21ksoftirqd/112:12:571
81600,0rcu_preempt19-21ksoftirqd/111:37:231
81600,0rcu_preempt19-21ksoftirqd/110:14:091
81590,0rcu_preempt23987-21ping07:22:070
81590,0rcu_preempt19-21ksoftirqd/111:55:231
81590,0rcu_preempt19-21ksoftirqd/110:47:461
81580,0rcu_preempt19-21ksoftirqd/108:37:121
10050580,0irq/346-484840018774-21ssh11:52:390
81570,0rcu_preempt3-21ksoftirqd/009:46:070
10050570,0irq/346-4848400171rcuc/109:39:351
81560,0rcu_preempt917-21rpcbind07:56:281
9950550,0irq/345-484840027734-1kworker/0:1H11:27:030
81550,0rcu_preempt19-21ksoftirqd/109:47:211
81550,0rcu_preempt19-21ksoftirqd/108:17:501
81550,0rcu_preempt19-21ksoftirqd/108:16:381
81540,0rcu_preempt3-21ksoftirqd/010:37:080
81540,0rcu_preempt19-21ksoftirqd/109:02:341
81540,0rcu_preempt19-21ksoftirqd/108:52:351
81530,0rcu_preempt19-21ksoftirqd/112:32:351
81530,0rcu_preempt19-21ksoftirqd/110:30:341
81530,0rcu_preempt19-21ksoftirqd/110:17:141
81520,0rcu_preempt3-21ksoftirqd/011:32:350
81520,0rcu_preempt21031-21df07:07:211
81520,0rcu_preempt19-21ksoftirqd/107:59:491
10050520,0irq/346-484840019103-21taskset10:25:010
10050520,0irq/346-4848400171rcuc/111:00:541
81510,0rcu_preempt3-21ksoftirqd/012:22:350
81510,0rcu_preempt3-21ksoftirqd/010:20:120
81510,0rcu_preempt19-21ksoftirqd/110:32:261
81510,0rcu_preempt19-21ksoftirqd/109:07:311
81510,0rcu_preempt19-21ksoftirqd/108:23:561
81500,0rcu_preempt3-21ksoftirqd/009:32:330
81500,0rcu_preempt315-21ssh10:43:211
81500,0rcu_preempt19-21ksoftirqd/108:32:241
81500,0rcu_preempt19-21ksoftirqd/107:37:321
10050500,0irq/346-484840054-21kswapd010:52:040
81490,0rcu_preempt3-21ksoftirqd/009:09:470
81490,0rcu_preempt3-21ksoftirqd/008:17:080
81490,0rcu_preempt3-21ksoftirqd/008:12:300
81490,0rcu_preempt3-21ksoftirqd/007:57:450
81490,0rcu_preempt19089-21diskstats11:12:311
2070899496,0cyclictest22054-1kworker/1:0H07:12:211
10050490,0irq/346-48484000-21swapper/011:45:330
81480,0rcu_preempt3-21ksoftirqd/008:32:210
81480,0rcu_preempt3-21ksoftirqd/008:07:070
81480,0rcu_preempt19-21ksoftirqd/107:47:371
81480,0rcu_preempt19-21ksoftirqd/107:28:001
81480,0rcu_preempt19-21ksoftirqd/107:17:311
2070899482,0cyclictest25230-21munin-node1
2070899481,0cyclictest16074-21seq08:31:011
10050480,0irq/346-4848400753-21rngd11:31:480
10050480,0irq/346-48484002656-21df_inode09:17:260
10050480,0irq/346-48484001250-21lldpd11:11:510
81470,0rcu_preempt3-21ksoftirqd/010:00:410
81470,0rcu_preempt3-21ksoftirqd/008:22:200
81470,0rcu_preempt3-21ksoftirqd/008:02:260
81470,0rcu_preempt31267-21kworker/0:011:47:290
81470,0rcu_preempt22444-21apt-get11:17:210
81470,0rcu_preempt19-21ksoftirqd/110:07:261
81470,0rcu_preempt19-21ksoftirqd/107:23:361
81470,0rcu_preempt14191-21kworker/0:008:38:170
10050470,0irq/346-48484007759-1kworker/0:3H10:57:370
10050470,0irq/346-48484002930-1kworker/0:1H11:37:080
81460,0rcu_preempt3-21ksoftirqd/009:37:280
81460,0rcu_preempt3-21ksoftirqd/008:52:200
81460,0rcu_preempt19-21ksoftirqd/107:36:511
10050460,0irq/346-484840026255-21kworker/0:112:03:050
81450,0rcu_preempt3-21ksoftirqd/010:27:350
81450,0rcu_preempt3-21ksoftirqd/010:07:390
81450,0rcu_preempt3-21ksoftirqd/009:30:370
81450,0rcu_preempt3-21ksoftirqd/009:30:370
81450,0rcu_preempt3-21ksoftirqd/008:42:260
81450,0rcu_preempt3-21ksoftirqd/007:07:190
81450,0rcu_preempt19-21ksoftirqd/108:51:121
81450,0rcu_preempt19-21ksoftirqd/108:42:251
81450,0rcu_preempt14648-21kworker/0:211:17:070
10050450,0irq/346-484840054-21kswapd009:22:200
10050450,0irq/346-4848400382-21irqstats07:42:350
10050450,0irq/346-484840025725-1kworker/0:1H10:34:420
10050450,0irq/346-48484000-21swapper/011:59:430
81440,0rcu_preempt3-21ksoftirqd/008:57:350
81440,0rcu_preempt2250-21apt-get10:02:200
10050440,0irq/346-4848400753-21rngd10:42:310
10050440,0irq/346-484840054-21kswapd009:03:270
81430,0rcu_preempt3-21ksoftirqd/007:22:260
81430,0rcu_preempt23987-21ping07:27:200
81420,0rcu_preempt3-21ksoftirqd/008:50:350
81420,0rcu_preempt12799-21munin-node0
10050410,0irq/346-48484000-21swapper/007:02:220
81400,0rcu_preempt3-21ksoftirqd/008:29:260
81400,0rcu_preempt0-21swapper/007:37:250
81390,0rcu_preempt3-21ksoftirqd/007:47:350
2070899396,0cyclictest20397-1kworker/1:2H07:07:071
81380,0rcu_preempt29055-21apt-get07:32:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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