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2026-05-08 - 16:49

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 Fri May 08, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811240,0rcu_preempt3-21ksoftirqd/009:08:260
811160,0rcu_preempt3-21ksoftirqd/011:09:150
81960,0rcu_preempt3-21ksoftirqd/010:15:490
81760,0rcu_preempt3-21ksoftirqd/012:27:290
81760,0rcu_preempt3-21ksoftirqd/011:54:000
81760,0rcu_preempt3-21ksoftirqd/010:22:240
557699762,0cyclictest10752-21munin-node0
10050760,0irq/346-484840041ktimersoftd/012:28:470
81750,0rcu_preempt3-21ksoftirqd/009:18:170
9950740,0irq/345-4848400111rcuc/009:38:270
81740,0rcu_preempt3-21ksoftirqd/008:38:240
557699742,0cyclictest12385-21ssh11:18:110
9950720,0irq/345-4848400111rcuc/010:04:290
9950720,0irq/345-4848400111rcuc/009:35:110
81720,0rcu_preempt3-21ksoftirqd/010:49:550
81720,0rcu_preempt3-21ksoftirqd/010:49:550
557699723,0cyclictest27263-1kworker/0:1H12:05:510
5576997221,0cyclictest0-21swapper/010:59:360
5576997221,0cyclictest0-21swapper/010:59:360
81710,0rcu_preempt3-21ksoftirqd/010:42:000
557699712,0cyclictest8857-21ping07:38:340
557699712,0cyclictest22710-21ssh11:28:240
81700,0rcu_preempt7565-21diskstats07:13:220
81700,0rcu_preempt3-21ksoftirqd/007:08:250
557699702,0cyclictest17676-21sort09:13:090
557699701,0cyclictest533-21head08:28:370
557699701,0cyclictest2431-21apt-get12:13:190
557699701,0cyclictest2431-21apt-get12:13:190
81690,0rcu_preempt1199-21munin-node0
81680,0rcu_preempt3-21ksoftirqd/012:34:310
81680,0rcu_preempt3-21ksoftirqd/012:34:310
81680,0rcu_preempt3-21ksoftirqd/010:11:030
81680,0rcu_preempt28594-21latency_hist08:18:081
81680,0rcu_preempt19-21ksoftirqd/111:57:141
557699683,0cyclictest0-21swapper/011:48:320
557699682,0cyclictest9385-21latency_hist08:58:080
557699681,0cyclictest27873-21cat11:33:270
81670,0rcu_preempt3-21ksoftirqd/008:23:330
81670,0rcu_preempt30345-21apt-get08:23:181
81670,0rcu_preempt18051-21df_abs09:13:231
557699672,0cyclictest0-21swapper/009:28:570
5576996720,0cyclictest0-21swapper/009:27:060
81660,0rcu_preempt3-21ksoftirqd/011:27:000
5576996621,0cyclictest0-21swapper/010:23:170
557699662,0cyclictest8558-21ssh11:13:350
5576996615,0cyclictest27890-21munin-node0
557699661,0cyclictest30353-21dropbear09:58:210
557699661,0cyclictest21381-21ssh10:53:440
81650,0rcu_preempt30857-21memory09:58:311
81650,0rcu_preempt21759-21ping07:58:310
557699652,0cyclictest19049-21ssh09:46:590
557699652,0cyclictest0-21swapper/011:03:360
81640,0rcu_preempt6213-21users11:43:380
557699648,0cyclictest0-21swapper/010:35:480
557699643,0cyclictest0-21swapper/008:43:180
557699642,0cyclictest0-21swapper/011:43:030
557699641,0cyclictest25522-21basename09:53:260
557699641,0cyclictest0-21swapper/009:03:280
81630,0rcu_preempt19-21ksoftirqd/109:53:381
557699632,0cyclictest0-21swapper/012:02:370
557699632,0cyclictest0-21swapper/009:52:320
81620,0rcu_preempt3-21ksoftirqd/008:53:180
81620,0rcu_preempt30686-21ssh12:08:310
81620,0rcu_preempt19-21ksoftirqd/112:18:371
557699622,0cyclictest11214-21runrttasks12:21:550
557699621,0cyclictest12751-21runrttasks07:28:290
81610,0rcu_preempt19-21ksoftirqd/110:38:341
5576996121,0cyclictest28535-21idleruntime-cro08:18:070
557699612,0cyclictest19050-21dropbear07:48:210
5576996116,0cyclictest26899-21idleruntime-cro08:13:080
184812610,0chrt10050irq/346-484840007:45:510
81590,0rcu_preempt19-21ksoftirqd/108:43:281
81590,0rcu_preempt19-21ksoftirqd/108:03:311
557699591,0cyclictest8857-21ping07:23:080
81580,0rcu_preempt3-21ksoftirqd/008:48:300
81580,0rcu_preempt19-21ksoftirqd/112:09:331
81580,0rcu_preempt19-21ksoftirqd/111:48:261
81580,0rcu_preempt19-21ksoftirqd/107:18:201
557699582,0cyclictest0-21swapper/008:18:330
81570,0rcu_preempt19-21ksoftirqd/112:33:171
81570,0rcu_preempt19-21ksoftirqd/112:33:171
9950560,0irq/345-4848400557799cyclictest10:48:151
9950560,0irq/345-4848400557799cyclictest10:48:151
557699563,0cyclictest11336-21ntp_states07:23:360
81550,0rcu_preempt19-21ksoftirqd/111:29:161
81550,0rcu_preempt19-21ksoftirqd/111:15:531
81550,0rcu_preempt19-21ksoftirqd/110:58:261
81550,0rcu_preempt19-21ksoftirqd/110:58:261
81550,0rcu_preempt19-21ksoftirqd/110:23:351
81550,0rcu_preempt19-21ksoftirqd/110:14:491
81540,0rcu_preempt3-21ksoftirqd/007:08:090
81540,0rcu_preempt19-21ksoftirqd/111:41:151
81540,0rcu_preempt19-21ksoftirqd/111:24:331
81540,0rcu_preempt19-21ksoftirqd/110:30:211
81540,0rcu_preempt19-21ksoftirqd/108:50:231
557699542,0cyclictest8857-21ping07:33:190
557699542,0cyclictest8857-21ping07:33:190
557699542,0cyclictest0-21swapper/007:53:320
81530,0rcu_preempt25144-21kworker/1:011:37:451
81530,0rcu_preempt19-21ksoftirqd/112:06:001
81530,0rcu_preempt19-21ksoftirqd/111:44:291
81530,0rcu_preempt19-21ksoftirqd/110:18:281
81530,0rcu_preempt19-21ksoftirqd/109:48:201
81530,0rcu_preempt19-21ksoftirqd/109:30:261
81530,0rcu_preempt19-21ksoftirqd/108:28:251
81530,0rcu_preempt19-21ksoftirqd/107:52:231
81520,0rcu_preempt19-21ksoftirqd/110:35:551
81520,0rcu_preempt19-21ksoftirqd/109:46:201
557699521,0cyclictest25010-1kworker/0:0H08:05:280
81510,0rcu_preempt19-21ksoftirqd/110:08:251
81510,0rcu_preempt19-21ksoftirqd/109:40:291
81510,0rcu_preempt19-21ksoftirqd/108:22:241
81510,0rcu_preempt19-21ksoftirqd/108:01:241
81510,0rcu_preempt0-21swapper/111:23:051
81490,0rcu_preempt19-21ksoftirqd/112:25:421
81470,0rcu_preempt19-21ksoftirqd/112:28:201
81470,0rcu_preempt19-21ksoftirqd/111:11:151
81460,0rcu_preempt19-21ksoftirqd/110:53:361
81460,0rcu_preempt19-21ksoftirqd/107:03:261
81450,0rcu_preempt8937-1kworker/1:1H08:55:341
81450,0rcu_preempt19-21ksoftirqd/110:03:351
81450,0rcu_preempt19-21ksoftirqd/107:23:241
81450,0rcu_preempt0-21swapper/109:26:401
81440,0rcu_preempt0-21swapper/109:33:561
81430,0rcu_preempt6953-21taskset07:10:311
81430,0rcu_preempt54-21kswapd007:17:141
81430,0rcu_preempt2424-21munin-node1
81430,0rcu_preempt2424-21munin-node1
81430,0rcu_preempt0-21swapper/108:33:201
81420,0rcu_preempt19-21ksoftirqd/110:45:391
81420,0rcu_preempt19-21ksoftirqd/107:43:421
81420,0rcu_preempt15383-21sh09:10:191
81420,0rcu_preempt12568-21diskmemload11:58:261
81410,0rcu_preempt9439-21apt-get08:58:171
81410,0rcu_preempt30726-21kworker/1:308:38:491
81410,0rcu_preempt19-21ksoftirqd/111:04:361
81400,0rcu_preempt19-21ksoftirqd/109:18:211
81400,0rcu_preempt19-21ksoftirqd/107:55:491
81390,0rcu_preempt19-21ksoftirqd/109:06:481
81390,0rcu_preempt19-21ksoftirqd/108:08:091
81380,0rcu_preempt19-21ksoftirqd/107:28:231
81370,0rcu_preempt19-21ksoftirqd/107:43:081
81360,0rcu_preempt19-21ksoftirqd/107:33:301
81360,0rcu_preempt19-21ksoftirqd/107:33:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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