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2026-04-08 - 00:07

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 here to display the system's profile data or here to proceed to next system.
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 highest latencies:
System rackaslot5s.osadl.org (updated Tue Apr 07, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt3-21ksoftirqd/010:47:100
811010,0rcu_preempt3-21ksoftirqd/009:49:150
81970,0rcu_preempt19-21ksoftirqd/109:18:491
81960,0rcu_preempt0-21swapper/011:05:430
81950,0rcu_preempt13610-21df_inode12:28:521
81940,0rcu_preempt19-21ksoftirqd/109:12:111
81810,0rcu_preempt19-21ksoftirqd/109:53:531
81720,0rcu_preempt6887-21kworker/1:210:06:251
81720,0rcu_preempt6887-21kworker/1:210:06:251
81720,0rcu_preempt19-21ksoftirqd/110:19:121
81700,0rcu_preempt3-21ksoftirqd/010:36:010
81700,0rcu_preempt19-21ksoftirqd/111:06:041
81690,0rcu_preempt3-21ksoftirqd/011:55:220
81690,0rcu_preempt15390-21ssh11:57:551
81680,0rcu_preempt3-21ksoftirqd/011:14:000
3565996425,0cyclictest12872-21apt-get09:43:490
81630,0rcu_preempt19-21ksoftirqd/110:58:251
81620,0rcu_preempt19-21ksoftirqd/109:16:211
81610,0rcu_preempt851-21rngd10:05:370
81610,0rcu_preempt851-21rngd10:05:370
81610,0rcu_preempt19-21ksoftirqd/111:33:331
3565996124,0cyclictest6844-21ping07:44:060
3565996124,0cyclictest2191-21apt-get10:38:490
3565996123,0cyclictest0-21swapper/012:24:590
81600,0rcu_preempt19-21ksoftirqd/112:25:111
81600,0rcu_preempt19-21ksoftirqd/111:21:121
3565996029,0cyclictest31262-21df_inode12:13:540
81590,0rcu_preempt19-21ksoftirqd/111:39:071
81590,0rcu_preempt19-21ksoftirqd/111:39:071
81590,0rcu_preempt19-21ksoftirqd/110:13:451
81590,0rcu_preempt19-21ksoftirqd/110:13:451
81590,0rcu_preempt19-21ksoftirqd/110:03:111
3565995917,0cyclictest32246-1kworker/0:2H09:34:550
3565995917,0cyclictest0-21swapper/010:14:270
3565995917,0cyclictest0-21swapper/010:14:270
3565995913,0cyclictest0-21swapper/012:07:530
81580,0rcu_preempt6887-21kworker/1:212:19:551
81580,0rcu_preempt10563-21diskmemload09:49:561
3565995824,0cyclictest18066-21munin-node0
3565995820,0cyclictest3887-21ssh11:45:430
3565995820,0cyclictest14210-21apt-get11:23:490
81570,0rcu_preempt54-21kswapd010:39:551
81570,0rcu_preempt3-21ksoftirqd/008:28:530
81570,0rcu_preempt19-21ksoftirqd/112:14:071
3565995725,0cyclictest13352-21apt-get12:28:480
3565995719,0cyclictest3031-21ssh11:12:180
3565995713,0cyclictest20317-1kworker/0:3H09:19:180
3565995713,0cyclictest0-21swapper/010:09:340
81560,0rcu_preempt3-21ksoftirqd/010:49:020
3565995624,0cyclictest22717-21apt-get09:53:490
3565995619,0cyclictest3564-21cyclictest09:23:490
3565995618,0cyclictest11934-1kworker/0:2H09:13:440
3565995613,0cyclictest0-21swapper/012:11:210
3565995613,0cyclictest0-21swapper/011:33:280
3565995612,0cyclictest0-21swapper/011:41:090
3565995612,0cyclictest0-21swapper/011:41:090
81550,0rcu_preempt54-21kswapd009:43:291
81550,0rcu_preempt19724-21ping07:59:090
3565995522,0cyclictest0-21swapper/012:33:440
3565995522,0cyclictest0-21swapper/012:33:440
3565995519,0cyclictest29784-21ssh10:00:150
3565995512,0cyclictest0-21swapper/010:30:060
3565995511,0cyclictest32246-1kworker/0:2H09:38:520
81540,0rcu_preempt3-21ksoftirqd/011:19:040
81540,0rcu_preempt19-21ksoftirqd/112:03:391
81540,0rcu_preempt19-21ksoftirqd/107:24:041
81530,0rcu_preempt3-21ksoftirqd/010:18:490
3565995321,0cyclictest6339-21apt-get11:48:480
3565995315,0cyclictest13927-21chrt07:39:000
81520,0rcu_preempt3-21ksoftirqd/008:53:560
81520,0rcu_preempt19-21ksoftirqd/112:08:591
81520,0rcu_preempt19-21ksoftirqd/109:23:561
3565995221,0cyclictest19890-21ssh10:23:480
3565995220,0cyclictest10050irq/346-484840012:02:180
3565995219,0cyclictest3504-21munin-node0
81510,0rcu_preempt851-21rngd08:19:041
81510,0rcu_preempt14378-21kworker/0:107:25:110
3565995122,0cyclictest54-21kswapd011:34:010
3565995120,0cyclictest825-21apt-get08:38:470
3565995117,0cyclictest0-21swapper/009:12:390
3565995112,0cyclictest6844-21ping07:20:300
81500,0rcu_preempt24796-21kworker/0:208:14:070
81500,0rcu_preempt21423-21kworker/0:210:59:000
81500,0rcu_preempt19-21ksoftirqd/110:58:491
3565995017,0cyclictest31369-21rm09:29:030
3565994919,0cyclictest28519-21dropbear08:23:520
3565994917,0cyclictest8782-21sshd09:02:150
3565994917,0cyclictest31173-1kworker/0:0H08:33:580
3565994913,0cyclictest0-21swapper/007:29:010
81480,0rcu_preempt6844-21ping07:38:370
81480,0rcu_preempt3-21ksoftirqd/008:08:550
81480,0rcu_preempt3-21ksoftirqd/008:03:550
81480,0rcu_preempt19-21ksoftirqd/110:43:571
81470,0rcu_preempt6887-21kworker/1:211:49:051
81470,0rcu_preempt5338-21df_abs10:08:511
81470,0rcu_preempt19-21ksoftirqd/108:38:561
81470,0rcu_preempt19-21ksoftirqd/108:08:581
81470,0rcu_preempt19-21ksoftirqd/107:56:361
81470,0rcu_preempt19-21ksoftirqd/107:39:021
81470,0rcu_preempt19-21ksoftirqd/107:03:531
3565994719,0cyclictest19972-21munin-run07:58:370
81460,0rcu_preempt3-21ksoftirqd/008:48:580
81460,0rcu_preempt28329-21kworker/0:109:03:390
81460,0rcu_preempt19-21ksoftirqd/111:09:201
81460,0rcu_preempt19-21ksoftirqd/110:23:411
81460,0rcu_preempt19-21ksoftirqd/108:13:591
356599464,0cyclictest6844-21ping07:18:370
3565994618,0cyclictest26877-21dropbear08:18:530
81450,0rcu_preempt3522-21chrt08:44:050
81450,0rcu_preempt3-21ksoftirqd/007:08:590
81450,0rcu_preempt19-21ksoftirqd/111:44:061
81450,0rcu_preempt19-21ksoftirqd/111:13:491
81450,0rcu_preempt19-21ksoftirqd/110:49:051
81450,0rcu_preempt19-21ksoftirqd/108:23:491
81440,0rcu_preempt19-21ksoftirqd/112:38:271
81440,0rcu_preempt19-21ksoftirqd/112:38:271
81440,0rcu_preempt19-21ksoftirqd/111:28:381
81440,0rcu_preempt19-21ksoftirqd/107:34:301
81440,0rcu_preempt19-21ksoftirqd/107:32:211
3565994416,0cyclictest17067-21grep07:48:530
81430,0rcu_preempt6530-1kworker/1:1H07:19:111
81430,0rcu_preempt19-21ksoftirqd/107:13:551
81420,0rcu_preempt3-21ksoftirqd/007:03:520
81420,0rcu_preempt19-21ksoftirqd/110:29:521
81420,0rcu_preempt19-21ksoftirqd/109:33:351
81410,0rcu_preempt19-21ksoftirqd/111:33:481
81410,0rcu_preempt19-21ksoftirqd/110:34:041
81410,0rcu_preempt19-21ksoftirqd/107:58:561
81410,0rcu_preempt19-21ksoftirqd/107:51:331
81400,0rcu_preempt19-21ksoftirqd/111:58:531
81400,0rcu_preempt19-21ksoftirqd/109:46:271
81400,0rcu_preempt19-21ksoftirqd/109:37:201
81400,0rcu_preempt19-21ksoftirqd/108:53:511
81400,0rcu_preempt19-21ksoftirqd/108:35:371
81400,0rcu_preempt19-21ksoftirqd/108:06:481
81400,0rcu_preempt19-21ksoftirqd/107:43:521
81390,0rcu_preempt19-21ksoftirqd/109:08:031
81390,0rcu_preempt19-21ksoftirqd/108:48:591
81390,0rcu_preempt19-21ksoftirqd/108:45:001
81380,0rcu_preempt19-21ksoftirqd/109:03:141
81380,0rcu_preempt19-21ksoftirqd/108:31:181
81380,0rcu_preempt19-21ksoftirqd/107:08:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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