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2025-11-26 - 23:41

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 Wed Nov 26, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2926621180,0sleep010050irq/346-484840008:00:320
2926621180,0sleep010050irq/346-484840008:00:320
811170,0rcu_preempt11456-1kworker/0:0H10:31:300
512621050,0sleep010050irq/346-484840008:26:250
81800,0rcu_preempt19-21ksoftirqd/111:19:321
81800,0rcu_preempt19-21ksoftirqd/111:19:321
81780,0rcu_preempt3-21ksoftirqd/011:04:400
11642997825,0cyclictest16582-1kworker/0:0H09:30:140
81760,0rcu_preempt3-21ksoftirqd/009:09:420
81750,0rcu_preempt19-21ksoftirqd/110:20:181
9950730,0irq/345-4848400111rcuc/012:35:190
81720,0rcu_preempt3-21ksoftirqd/011:12:450
81720,0rcu_preempt3-21ksoftirqd/009:26:080
11642997221,0cyclictest20503-21ssh09:59:410
1164299722,0cyclictest27398-1kworker/0:1H09:23:130
9950710,0irq/345-4848400111rcuc/010:54:260
81710,0rcu_preempt27937-21kworker/0:211:39:420
81710,0rcu_preempt19-21ksoftirqd/111:09:411
327062710,0sleep010050irq/346-484840008:12:280
1164299712,0cyclictest15379-1kworker/0:0H09:54:430
9950700,0irq/345-4848400111rcuc/010:26:540
1164299709,0cyclictest24892-21munin-node0
1164299709,0cyclictest24892-21munin-node0
11642997026,0cyclictest0-21swapper/012:04:480
81690,0rcu_preempt3-21ksoftirqd/011:16:330
81690,0rcu_preempt28187-21apt-get10:54:410
11642996926,0cyclictest29037-21sendmail11:39:300
11642996920,0cyclictest406-1kworker/0:3H10:19:310
11642996919,0cyclictest22642-1kworker/0:0H10:48:030
34282680,0sleep010050irq/346-484840008:20:450
1164299682,0cyclictest26605-21ssh12:17:230
81670,0rcu_preempt19-21ksoftirqd/110:04:041
81670,0rcu_preempt19-21ksoftirqd/107:34:561
11642996724,0cyclictest0-21swapper/010:13:240
1164299672,0cyclictest14673-21ls11:19:540
1164299672,0cyclictest14673-21ls11:19:540
81660,0rcu_preempt3-21ksoftirqd/009:42:100
81660,0rcu_preempt19-21ksoftirqd/110:05:011
81660,0rcu_preempt19-21ksoftirqd/110:05:011
11642996626,0cyclictest17881-1kworker/0:0H12:09:580
1164299662,0cyclictest0-21swapper/008:49:530
11642996615,0cyclictest1369-21runrttasks10:40:450
81650,0rcu_preempt27087-21meminfo07:54:520
81650,0rcu_preempt19-21ksoftirqd/109:16:121
81650,0rcu_preempt19-21ksoftirqd/109:16:121
308912650,0sleep010050irq/346-484840008:05:270
11642996523,0cyclictest8098-21cpu11:54:450
1164299652,0cyclictest32153-21apt-get12:24:410
81640,0rcu_preempt19-21ksoftirqd/111:05:341
1164299648,0cyclictest16789-21sh10:39:310
11642996424,0cyclictest3-21ksoftirqd/007:39:320
11642996424,0cyclictest0-21swapper/012:00:060
1164299642,0cyclictest4095-21munin-node0
1164299642,0cyclictest2206050kworker/0:1H12:19:530
1164299642,0cyclictest1950-1kworker/0:2H12:29:590
1164299642,0cyclictest1950-1kworker/0:2H12:29:590
1164299642,0cyclictest0-21swapper/010:19:430
1164299641,0cyclictest19933-1kworker/0:0H11:29:490
1164299641,0cyclictest0-21swapper/009:53:000
81630,0rcu_preempt19-21ksoftirqd/112:00:261
81630,0rcu_preempt19-21ksoftirqd/111:49:421
81630,0rcu_preempt19-21ksoftirqd/110:15:021
81630,0rcu_preempt19-21ksoftirqd/109:59:311
81630,0rcu_preempt15414-21munin-node0
1164299632,0cyclictest10323-21aten_rapower_cu09:44:440
1164299632,0cyclictest0-21swapper/011:44:470
81620,0rcu_preempt3-21ksoftirqd/009:04:500
81620,0rcu_preempt19-21ksoftirqd/110:34:441
81620,0rcu_preempt19-21ksoftirqd/109:38:431
11642996222,0cyclictest20549-1kworker/0:1H09:14:400
11642996222,0cyclictest20549-1kworker/0:1H09:14:400
1164299621,0cyclictest1369-21runrttasks11:27:500
1164299621,0cyclictest1369-21runrttasks08:39:510
81610,0rcu_preempt19-21ksoftirqd/112:10:051
81610,0rcu_preempt14909-21ping07:24:411
1164299613,0cyclictest7147-21latency_hist08:34:310
11642996124,0cyclictest0-21swapper/010:59:430
81600,0rcu_preempt19-21ksoftirqd/108:14:461
81600,0rcu_preempt19-21ksoftirqd/108:14:461
81600,0rcu_preempt19-21ksoftirqd/108:09:591
1164299607,0cyclictest14909-21ping07:19:330
1164299603,0cyclictest0-21swapper/007:54:310
11642996024,0cyclictest873-21fschecks_time08:14:500
11642996024,0cyclictest873-21fschecks_time08:14:500
11642996022,0cyclictest0-21swapper/007:15:000
81590,0rcu_preempt19-21ksoftirqd/109:49:531
81590,0rcu_preempt19-21ksoftirqd/107:39:591
81590,0rcu_preempt11075-21meminfo08:44:560
66422590,0sleep010050irq/346-484840008:30:120
1164299595,0cyclictest0-21swapper/009:37:130
1164299591,0cyclictest14909-21ping07:39:470
1164299591,0cyclictest12115-21if_err_can007:09:540
81580,0rcu_preempt19-21ksoftirqd/111:57:351
81580,0rcu_preempt19-21ksoftirqd/111:38:461
81580,0rcu_preempt19-21ksoftirqd/111:18:331
81580,0rcu_preempt19-21ksoftirqd/110:28:181
81580,0rcu_preempt19-21ksoftirqd/110:11:571
1164299585,0cyclictest3-21ksoftirqd/007:24:550
1164299581,0cyclictest14909-21ping07:32:080
96872570,0sleep19950irq/345-484840009:43:321
81570,0rcu_preempt54-21kswapd011:04:121
81570,0rcu_preempt29016-21ps12:19:581
81570,0rcu_preempt19-21ksoftirqd/112:36:031
81570,0rcu_preempt19-21ksoftirqd/112:24:561
81570,0rcu_preempt19-21ksoftirqd/109:45:361
1164299572,0cyclictest14909-21ping07:44:490
81560,0rcu_preempt19-21ksoftirqd/112:04:511
81560,0rcu_preempt19-21ksoftirqd/109:31:431
81560,0rcu_preempt19-21ksoftirqd/108:40:291
1164299562,0cyclictest0-21swapper/008:54:440
81550,0rcu_preempt19-21ksoftirqd/111:45:031
81550,0rcu_preempt19-21ksoftirqd/111:30:401
81550,0rcu_preempt19-21ksoftirqd/111:27:481
81550,0rcu_preempt19-21ksoftirqd/110:30:011
81550,0rcu_preempt19-21ksoftirqd/109:20:391
81550,0rcu_preempt19-21ksoftirqd/108:19:481
81550,0rcu_preempt19-21ksoftirqd/107:58:181
81540,0rcu_preempt19-21ksoftirqd/112:33:451
81540,0rcu_preempt19-21ksoftirqd/112:33:451
81540,0rcu_preempt19-21ksoftirqd/111:39:451
81540,0rcu_preempt19-21ksoftirqd/110:54:511
81540,0rcu_preempt19-21ksoftirqd/110:54:211
81540,0rcu_preempt19-21ksoftirqd/110:49:041
81540,0rcu_preempt19-21ksoftirqd/109:01:301
81530,0rcu_preempt19-21ksoftirqd/112:17:281
81530,0rcu_preempt19-21ksoftirqd/110:43:281
81530,0rcu_preempt19-21ksoftirqd/109:29:021
81530,0rcu_preempt19-21ksoftirqd/108:38:221
81520,0rcu_preempt19-21ksoftirqd/109:13:201
81520,0rcu_preempt19-21ksoftirqd/108:29:431
81520,0rcu_preempt19-21ksoftirqd/108:00:041
81520,0rcu_preempt19-21ksoftirqd/108:00:041
81520,0rcu_preempt19-21ksoftirqd/107:45:031
81520,0rcu_preempt19-21ksoftirqd/107:11:331
81510,0rcu_preempt19-21ksoftirqd/107:17:211
81500,0rcu_preempt19-21ksoftirqd/108:24:591
81490,0rcu_preempt19-21ksoftirqd/108:48:451
81470,0rcu_preempt19-21ksoftirqd/107:31:181
1164299452,0cyclictest0-21swapper/007:09:300
81420,0rcu_preempt0-21swapper/108:50:011
81410,0rcu_preempt19-21ksoftirqd/108:04:461
81410,0rcu_preempt19-21ksoftirqd/107:20:051
81410,0rcu_preempt19-21ksoftirqd/107:05:081
81410,0rcu_preempt0-21swapper/108:58:191
81400,0rcu_preempt19-21ksoftirqd/109:05:371
81400,0rcu_preempt19-21ksoftirqd/107:53:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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