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2026-07-01 - 08:05

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 the 100 highest latencies:
System rackaslot5s.osadl.org (updated Wed Jul 01, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811230,0rcu_preempt3-21ksoftirqd/000:31:060
811210,0rcu_preempt3-21ksoftirqd/021:13:190
811200,0rcu_preempt19-21ksoftirqd/120:07:571
811150,0rcu_preempt19-21ksoftirqd/121:23:421
811150,0rcu_preempt19-21ksoftirqd/121:23:421
811150,0rcu_preempt19-21ksoftirqd/100:18:111
811100,0rcu_preempt3-21ksoftirqd/000:19:520
811040,0rcu_preempt3-21ksoftirqd/022:31:290
811020,0rcu_preempt14275-21kworker/1:022:08:291
811010,0rcu_preempt11539-21ssh23:08:590
81970,0rcu_preempt19-21ksoftirqd/121:46:561
81930,0rcu_preempt0-21swapper/100:07:231
81910,0rcu_preempt19-21ksoftirqd/122:42:471
81900,0rcu_preempt0-21swapper/122:47:461
81880,0rcu_preempt19-21ksoftirqd/100:22:391
81870,0rcu_preempt19-21ksoftirqd/122:14:521
81870,0rcu_preempt19-21ksoftirqd/122:14:521
81860,0rcu_preempt9686-21ssh00:13:121
81860,0rcu_preempt19-21ksoftirqd/121:40:491
81830,0rcu_preempt0-21swapper/123:42:321
81810,0rcu_preempt29697-21kworker/1:221:28:261
81810,0rcu_preempt19-21ksoftirqd/121:48:131
81810,0rcu_preempt0-21swapper/122:24:201
81800,0rcu_preempt19-21ksoftirqd/122:35:301
81800,0rcu_preempt19-21ksoftirqd/122:35:301
10050800,0irq/346-484840019688-1kworker/0:2H21:50:510
81790,0rcu_preempt23144-1kworker/0:2H19:38:250
81780,0rcu_preempt0-21swapper/121:12:321
81750,0rcu_preempt3-21ksoftirqd/023:54:160
81750,0rcu_preempt1957-21ssh23:32:310
81750,0rcu_preempt19-21ksoftirqd/122:54:131
81750,0rcu_preempt0-21swapper/119:37:501
81740,0rcu_preempt19-21ksoftirqd/123:50:581
81740,0rcu_preempt19-21ksoftirqd/121:10:241
81710,0rcu_preempt19-21ksoftirqd/120:02:361
81710,0rcu_preempt19-21ksoftirqd/120:02:361
81700,0rcu_preempt16293-1kworker/0:3H19:23:230
81680,0rcu_preempt19-21ksoftirqd/121:52:471
81680,0rcu_preempt19-21ksoftirqd/121:18:221
81680,0rcu_preempt15146-21diskstats22:07:310
81670,0rcu_preempt19-21ksoftirqd/123:27:081
81670,0rcu_preempt19-21ksoftirqd/122:40:551
81670,0rcu_preempt19-21ksoftirqd/119:22:281
81670,0rcu_preempt0-21swapper/119:16:591
1329099672,0cyclictest0-21swapper/022:49:310
81660,0rcu_preempt19-21ksoftirqd/123:05:071
81660,0rcu_preempt19-21ksoftirqd/119:27:491
81650,0rcu_preempt3-21ksoftirqd/022:54:450
81640,0rcu_preempt19-21ksoftirqd/121:34:451
81640,0rcu_preempt19-21ksoftirqd/119:11:581
1329099642,0cyclictest1470-21runrttasks23:15:260
81630,0rcu_preempt19-21ksoftirqd/100:28:401
81630,0rcu_preempt0-21swapper/123:37:311
81630,0rcu_preempt0-21swapper/123:07:331
1329099637,0cyclictest0-21swapper/023:43:060
1329099633,0cyclictest0-21swapper/023:00:320
1329099632,0cyclictest20590-21ntp_kernel_err22:12:380
1329099632,0cyclictest20590-21ntp_kernel_err22:12:380
81620,0rcu_preempt851-21rngd22:01:001
81620,0rcu_preempt19-21ksoftirqd/122:28:031
81620,0rcu_preempt19-21ksoftirqd/120:22:361
81620,0rcu_preempt0-21swapper/100:34:321
1329099623,0cyclictest0-21swapper/020:47:260
1329099622,0cyclictest2101-1kworker/0:0H21:57:360
1329099621,0cyclictest32735-1kworker/0:3H00:06:180
1329099621,0cyclictest11445-21chrt22:03:050
1329099621,0cyclictest10427-1kworker/0:1H00:26:080
81610,0rcu_preempt19-21ksoftirqd/123:56:461
81610,0rcu_preempt0-21swapper/120:47:411
1329099617,0cyclictest29334-21ping20:19:320
1329099613,0cyclictest0-21swapper/023:17:450
1329099613,0cyclictest0-21swapper/022:22:360
1329099612,0cyclictest23316-21runrttasks21:09:450
1329099612,0cyclictest14279-21ssh22:38:540
1329099612,0cyclictest11188-21rm00:15:070
81600,0rcu_preempt29334-21ping19:57:171
81600,0rcu_preempt0-21swapper/100:01:171
1329099608,0cyclictest14715-1kworker/0:0H21:34:120
1329099602,0cyclictest20328-21ssh21:07:170
1329099602,0cyclictest0-21swapper/023:27:580
1329099602,0cyclictest0-21swapper/022:36:190
1329099602,0cyclictest0-21swapper/022:36:190
13290996017,0cyclictest6402-21sshd23:03:420
81590,0rcu_preempt3-21ksoftirqd/023:37:400
81590,0rcu_preempt19-21ksoftirqd/123:16:431
81590,0rcu_preempt0-21swapper/123:35:471
81590,0rcu_preempt0-21swapper/121:02:411
1329099592,0cyclictest21095-21ssh22:46:240
1329099592,0cyclictest0-21swapper/000:01:470
1329099591,0cyclictest25776-21ssh22:17:450
1329099591,0cyclictest13842-1kworker/0:0H23:48:480
1329099591,0cyclictest1339-21snmpd21:27:250
81580,0rcu_preempt19-21ksoftirqd/123:19:291
1329099582,0cyclictest30127-1kworker/0:0H21:26:400
1329099582,0cyclictest30127-1kworker/0:0H21:26:400
1329099582,0cyclictest0-21swapper/019:22:150
1329099581,0cyclictest32735-1kworker/0:3H00:07:390
81570,0rcu_preempt3-21ksoftirqd/020:42:420
81570,0rcu_preempt19-21ksoftirqd/120:12:381
81570,0rcu_preempt19-21ksoftirqd/119:20:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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