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2026-05-29 - 18:20

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 Fri May 29, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811220,0rcu_preempt19-21ksoftirqd/111:03:461
811100,0rcu_preempt19-21ksoftirqd/109:51:031
811070,0rcu_preempt3-21ksoftirqd/012:02:210
811050,0rcu_preempt3-21ksoftirqd/011:00:360
81990,0rcu_preempt3-21ksoftirqd/012:23:000
81980,0rcu_preempt1470-21runrttasks10:49:550
81980,0rcu_preempt1470-21runrttasks10:49:550
81870,0rcu_preempt19-21ksoftirqd/110:38:041
10050850,0irq/346-4848400111rcuc/011:55:260
10050850,0irq/346-4848400111rcuc/011:55:260
81800,0rcu_preempt19-21ksoftirqd/110:15:421
81790,0rcu_preempt851-21rngd11:49:351
81770,0rcu_preempt3-21ksoftirqd/009:34:200
10050760,0irq/346-4848400111rcuc/011:04:460
10050760,0irq/346-4848400111rcuc/009:30:130
10050760,0irq/346-4848400111rcuc/009:23:400
81750,0rcu_preempt19-21ksoftirqd/111:47:091
81740,0rcu_preempt3-21ksoftirqd/011:15:340
9950730,0irq/345-4848400111rcuc/010:31:480
81730,0rcu_preempt54-21kswapd011:33:100
81730,0rcu_preempt54-21kswapd011:33:100
81730,0rcu_preempt3-21ksoftirqd/010:08:020
81720,0rcu_preempt3-21ksoftirqd/012:07:590
81720,0rcu_preempt3-21ksoftirqd/010:36:430
10050720,0irq/346-484840041ktimersoftd/011:09:530
81710,0rcu_preempt21632-21munin-node0
81690,0rcu_preempt3-21ksoftirqd/012:16:510
10050690,0irq/346-4848400111rcuc/011:30:120
10050690,0irq/346-4848400111rcuc/011:21:020
9950680,0irq/345-484840041ktimersoftd/010:47:430
9950680,0irq/345-484840041ktimersoftd/010:14:080
81680,0rcu_preempt19-21ksoftirqd/109:55:551
81680,0rcu_preempt0-21swapper/109:19:251
9950670,0irq/345-4848400111rcuc/011:24:280
81660,0rcu_preempt13965-21diskstats08:13:031
81650,0rcu_preempt19-21ksoftirqd/112:26:221
81640,0rcu_preempt19-21ksoftirqd/111:30:391
81640,0rcu_preempt19-21ksoftirqd/111:25:171
81630,0rcu_preempt19-21ksoftirqd/109:13:151
81620,0rcu_preempt19-21ksoftirqd/110:25:121
81620,0rcu_preempt19-21ksoftirqd/107:56:131
3085599624,0cyclictest10050irq/346-484840011:40:040
3085599622,0cyclictest27297-21ssh12:21:510
3085599621,0cyclictest3584-1kworker/0:2H10:24:070
81610,0rcu_preempt3-21ksoftirqd/012:03:060
81610,0rcu_preempt19-21ksoftirqd/110:48:561
81610,0rcu_preempt19-21ksoftirqd/110:48:561
81610,0rcu_preempt19-21ksoftirqd/107:38:131
3085599613,0cyclictest0-21swapper/009:47:550
3085599612,0cyclictest0-21swapper/009:12:380
3085599612,0cyclictest0-21swapper/007:39:300
81580,0rcu_preempt54-21kswapd010:59:171
81580,0rcu_preempt19-21ksoftirqd/112:15:101
81580,0rcu_preempt19-21ksoftirqd/109:43:081
3085599583,0cyclictest656-21ping07:37:470
3085599583,0cyclictest0-21swapper/010:19:210
3085599582,0cyclictest3278-21df07:28:020
3085599582,0cyclictest0-21swapper/011:50:300
81570,0rcu_preempt3-21ksoftirqd/007:57:580
81570,0rcu_preempt3-21ksoftirqd/007:57:580
81570,0rcu_preempt20533-21apt-get08:42:540
81570,0rcu_preempt19-21ksoftirqd/110:53:591
81560,0rcu_preempt3-21ksoftirqd/009:42:470
81560,0rcu_preempt19-21ksoftirqd/112:08:021
81560,0rcu_preempt19-21ksoftirqd/110:47:471
81560,0rcu_preempt19-21ksoftirqd/109:37:271
81560,0rcu_preempt0-21swapper/109:12:121
3085599562,0cyclictest0-21swapper/012:29:270
3085599562,0cyclictest0-21swapper/007:47:490
81550,0rcu_preempt19-21ksoftirqd/111:40:201
81550,0rcu_preempt19-21ksoftirqd/108:09:411
3085599551,0cyclictest656-21ping07:21:560
81540,0rcu_preempt3-21ksoftirqd/008:53:080
81540,0rcu_preempt3-21ksoftirqd/008:53:080
81540,0rcu_preempt3-21ksoftirqd/008:03:120
81540,0rcu_preempt19-21ksoftirqd/111:08:271
81540,0rcu_preempt15659-21kworker/0:108:23:230
81540,0rcu_preempt0-21swapper/108:03:121
3085599541,0cyclictest6979-21sshd07:42:510
81530,0rcu_preempt5953-21kworker/1:012:32:481
81530,0rcu_preempt19-21ksoftirqd/110:33:161
10050530,0irq/346-48484003584-1kworker/0:2H10:38:050
81520,0rcu_preempt9466-21ping08:13:110
81520,0rcu_preempt19-21ksoftirqd/109:28:041
25192520,0chrt10050irq/346-484840007:23:130
81510,0rcu_preempt3-21ksoftirqd/008:33:020
81510,0rcu_preempt3-21ksoftirqd/008:33:020
81510,0rcu_preempt19-21ksoftirqd/107:18:171
81500,0rcu_preempt3-21ksoftirqd/009:15:030
81500,0rcu_preempt3-21ksoftirqd/008:08:200
81500,0rcu_preempt19-21ksoftirqd/111:32:591
81500,0rcu_preempt19-21ksoftirqd/111:32:591
81500,0rcu_preempt0-21swapper/110:11:021
81490,0rcu_preempt3-21ksoftirqd/009:52:540
81490,0rcu_preempt3-21ksoftirqd/009:18:000
81490,0rcu_preempt19-21ksoftirqd/111:58:121
81490,0rcu_preempt19-21ksoftirqd/111:13:041
81490,0rcu_preempt19-21ksoftirqd/107:57:581
81490,0rcu_preempt19-21ksoftirqd/107:57:581
10050490,0irq/346-48484005551-1kworker/0:3H12:34:230
81480,0rcu_preempt3-21ksoftirqd/010:03:100
81480,0rcu_preempt19-21ksoftirqd/112:18:031
10050480,0irq/346-484840016134-1kworker/0:0H10:02:210
81470,0rcu_preempt3805-21php-cgi10:53:060
81470,0rcu_preempt3-21ksoftirqd/008:22:080
81470,0rcu_preempt3-21ksoftirqd/007:56:540
81470,0rcu_preempt3-21ksoftirqd/007:07:490
81470,0rcu_preempt19-21ksoftirqd/112:06:171
81470,0rcu_preempt19-21ksoftirqd/110:27:571
81460,0rcu_preempt3-21ksoftirqd/008:58:030
81460,0rcu_preempt28140-21kworker/1:110:18:141
81460,0rcu_preempt22177-21apt-get08:47:580
81460,0rcu_preempt19-21ksoftirqd/110:03:071
81460,0rcu_preempt19-21ksoftirqd/108:25:031
81460,0rcu_preempt19-21ksoftirqd/107:07:491
81450,0rcu_preempt27106-21apt-get09:02:590
81450,0rcu_preempt19-21ksoftirqd/108:17:491
81450,0rcu_preempt19-21ksoftirqd/107:43:311
81450,0rcu_preempt19-21ksoftirqd/107:28:041
81440,0rcu_preempt31218-21apt-get09:43:020
81440,0rcu_preempt19-21ksoftirqd/109:38:161
81430,0rcu_preempt19-21ksoftirqd/112:33:231
81430,0rcu_preempt19-21ksoftirqd/109:24:331
81420,0rcu_preempt28591-21diskmemload11:18:061
81420,0rcu_preempt19-21ksoftirqd/110:00:161
81420,0rcu_preempt19-21ksoftirqd/107:47:591
81410,0rcu_preempt3-21ksoftirqd/007:03:590
81410,0rcu_preempt19-21ksoftirqd/111:53:091
81410,0rcu_preempt19-21ksoftirqd/111:53:091
81410,0rcu_preempt19-21ksoftirqd/108:42:561
81410,0rcu_preempt19-21ksoftirqd/108:28:511
81410,0rcu_preempt19-21ksoftirqd/107:33:491
81400,0rcu_preempt3-21ksoftirqd/007:16:030
81400,0rcu_preempt23810-21munin-node1
81400,0rcu_preempt23810-21munin-node1
81390,0rcu_preempt3-21ksoftirqd/008:39:240
81390,0rcu_preempt19-21ksoftirqd/108:59:441
81390,0rcu_preempt19-21ksoftirqd/108:38:041
81390,0rcu_preempt19-21ksoftirqd/107:26:451
81380,0rcu_preempt19-21ksoftirqd/109:05:021
81380,0rcu_preempt19-21ksoftirqd/107:10:021
81370,0rcu_preempt3-21ksoftirqd/008:32:480
81370,0rcu_preempt19-21ksoftirqd/107:13:411
81360,0rcu_preempt19-21ksoftirqd/108:51:561
81360,0rcu_preempt19-21ksoftirqd/108:33:531
81360,0rcu_preempt19-21ksoftirqd/108:33:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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