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2026-07-19 - 09:52

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 highest latencies:
System rackaslot5s.osadl.org (updated Sun Jul 19, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811230,0rcu_preempt19-21ksoftirqd/119:16:591
811150,0rcu_preempt19-21ksoftirqd/100:11:191
811140,0rcu_preempt23455-21diskmemload00:14:151
811110,0rcu_preempt19-21ksoftirqd/123:07:161
811090,0rcu_preempt19-21ksoftirqd/121:15:091
811090,0rcu_preempt12327-21grep21:27:271
811080,0rcu_preempt17441-1kworker/1:0H23:46:401
811070,0rcu_preempt6837-21kworker/1:121:17:111
811070,0rcu_preempt19-21ksoftirqd/123:36:241
811060,0rcu_preempt20440-21dropbear23:47:161
811050,0rcu_preempt54-21kswapd023:37:191
811050,0rcu_preempt19-21ksoftirqd/123:57:221
811040,0rcu_preempt19-21ksoftirqd/123:30:051
811040,0rcu_preempt19-21ksoftirqd/122:35:481
811030,0rcu_preempt19-21ksoftirqd/122:19:371
811030,0rcu_preempt19-21ksoftirqd/121:43:271
811020,0rcu_preempt54-21kswapd021:57:251
811020,0rcu_preempt19-21ksoftirqd/122:38:261
811020,0rcu_preempt19-21ksoftirqd/121:37:201
811020,0rcu_preempt19-21ksoftirqd/119:32:321
811010,0rcu_preempt19-21ksoftirqd/122:29:291
811000,0rcu_preempt19-21ksoftirqd/122:49:031
811000,0rcu_preempt19-21ksoftirqd/100:02:211
811000,0rcu_preempt19-21ksoftirqd/100:02:211
81990,0rcu_preempt19-21ksoftirqd/121:47:171
81980,0rcu_preempt25109-21apt-get23:52:091
81980,0rcu_preempt19-21ksoftirqd/123:15:061
81980,0rcu_preempt19-21ksoftirqd/123:01:461
81970,0rcu_preempt19-21ksoftirqd/120:57:131
81960,0rcu_preempt19-21ksoftirqd/100:17:471
81950,0rcu_preempt19-21ksoftirqd/120:27:141
81950,0rcu_preempt18321-21ssh22:07:111
81940,0rcu_preempt19-21ksoftirqd/121:22:211
81930,0rcu_preempt19-21ksoftirqd/123:03:151
81920,0rcu_preempt19-21ksoftirqd/121:07:211
81910,0rcu_preempt19-21ksoftirqd/119:52:241
81900,0rcu_preempt19-21ksoftirqd/121:52:151
81890,0rcu_preempt19-21ksoftirqd/122:22:201
81890,0rcu_preempt19-21ksoftirqd/120:02:241
81860,0rcu_preempt19-21ksoftirqd/100:29:541
81850,0rcu_preempt54-21kswapd022:46:001
81850,0rcu_preempt19283-21missed_timers20:52:211
81840,0rcu_preempt19-21ksoftirqd/123:17:251
81810,0rcu_preempt28147-21aten_rapower_en19:42:131
81810,0rcu_preempt19-21ksoftirqd/122:06:461
81810,0rcu_preempt19-21ksoftirqd/120:23:111
81800,0rcu_preempt19-21ksoftirqd/123:21:591
81780,0rcu_preempt19-21ksoftirqd/121:34:471
81780,0rcu_preempt19-21ksoftirqd/119:30:281
81780,0rcu_preempt19-21ksoftirqd/119:21:591
81780,0rcu_preempt1339-21snmpd22:12:161
81770,0rcu_preempt19-21ksoftirqd/119:38:341
81770,0rcu_preempt19-21ksoftirqd/100:32:231
81770,0rcu_preempt0-21swapper/120:36:581
81760,0rcu_preempt19-21ksoftirqd/120:00:501
81750,0rcu_preempt19-21ksoftirqd/122:52:251
81750,0rcu_preempt19-21ksoftirqd/122:52:251
81750,0rcu_preempt19-21ksoftirqd/100:23:241
81740,0rcu_preempt0-21swapper/120:37:101
81730,0rcu_preempt19-21ksoftirqd/120:16:131
81720,0rcu_preempt19-21ksoftirqd/120:19:521
81710,0rcu_preempt19-21ksoftirqd/119:22:411
81700,0rcu_preempt19-21ksoftirqd/120:47:191
81700,0rcu_preempt19-21ksoftirqd/119:47:201
81700,0rcu_preempt19-21ksoftirqd/119:07:231
81670,0rcu_preempt19-21ksoftirqd/120:07:341
81660,0rcu_preempt16146-21processes20:42:221
1646799632,0cyclictest0-21swapper/000:31:420
81620,0rcu_preempt3-21ksoftirqd/021:22:270
1646799628,0cyclictest14734-1kworker/0:2H00:17:110
1646799626,0cyclictest15313-1kworker/0:0H22:03:540
1646799622,0cyclictest28158-21ssh22:49:200
1646799622,0cyclictest0-21swapper/020:11:590
1646799614,0cyclictest26014-1kworker/0:2H19:36:580
1646799611,0cyclictest53972sleep021:21:200
1646799602,0cyclictest12990-21runrttasks00:12:180
1646799602,0cyclictest0-21swapper/023:46:580
1646799602,0cyclictest0-21swapper/023:22:280
1646799602,0cyclictest0-21swapper/021:41:330
1646799602,0cyclictest0-21swapper/000:07:270
16467996015,0cyclictest0-21swapper/021:27:100
1646799601,0cyclictest6346-21munin-node0
1646799601,0cyclictest22628-1kworker/0:1H23:05:100
1646799601,0cyclictest0-21swapper/000:33:120
81590,0rcu_preempt3-21ksoftirqd/000:04:020
81590,0rcu_preempt3-21ksoftirqd/000:04:020
1646799592,0cyclictest29401-21meminfo21:12:240
1646799592,0cyclictest24400-21ssh00:23:320
1646799592,0cyclictest0-21swapper/023:48:470
1646799592,0cyclictest0-21swapper/022:30:580
1646799591,0cyclictest432-1kworker/0:0H21:50:290
1646799585,0cyclictest0-21swapper/021:46:100
1646799583,0cyclictest0-21swapper/023:40:130
1646799582,0cyclictest0-21swapper/023:52:200
1646799582,0cyclictest0-21swapper/023:07:080
1646799582,0cyclictest0-21swapper/021:52:260
1646799582,0cyclictest0-21swapper/021:33:210
1646799581,0cyclictest10364-1kworker/0:3H21:58:330
1646799573,0cyclictest0-21swapper/023:12:190
1646799572,0cyclictest21249-21runrttasks22:42:230
16467995713,0cyclictest969-21ssh22:54:430
16467995713,0cyclictest969-21ssh22:54:430
1646799571,0cyclictest0-21swapper/022:34:470
16467995710,0cyclictest0-21swapper/022:09:180
81560,0rcu_preempt19-21ksoftirqd/121:02:101
1646799569,0cyclictest0-21swapper/022:21:390
1646799568,0cyclictest25216-1kworker/0:2H22:16:560
1646799563,0cyclictest0-21swapper/023:26:590
1646799562,0cyclictest4365-21ssh22:25:400
1646799562,0cyclictest0-21swapper/022:58:540
1646799562,0cyclictest0-21swapper/021:08:330
16467995617,0cyclictest0-21swapper/020:17:100
1646799553,0cyclictest0-21swapper/019:57:130
1646799551,0cyclictest30863-21ls23:57:240
1646799551,0cyclictest27942-1kworker/0:0H19:42:210
81540,0rcu_preempt3-21ksoftirqd/020:57:210
1646799549,0cyclictest0-21swapper/022:41:580
1646799542,0cyclictest3746-21idleruntime-cro20:06:580
1646799542,0cyclictest21651-21munin-node0
1646799542,0cyclictest0-21swapper/023:21:420
1646799541,0cyclictest14395-21ntpq20:37:220
1646799534,0cyclictest0-21swapper/020:07:110
1646799533,0cyclictest0-21swapper/020:22:250
1646799532,0cyclictest31218-21munin-run19:51:580
1646799522,0cyclictest0-21swapper/020:42:130
1646799522,0cyclictest0-21swapper/019:07:130
16467995210,0cyclictest32737-21runrttasks19:55:460
1646799502,0cyclictest19749-21ping19:16:580
1646799502,0cyclictest0-21swapper/020:47:270
1646799502,0cyclictest0-21swapper/020:33:540
1646799501,0cyclictest0-21swapper/020:52:170
1646799492,0cyclictest26463-21apt-get19:37:100
1646799491,0cyclictest22143-21df21:02:120
1646799491,0cyclictest19749-21ping19:27:120
1646799491,0cyclictest19749-21ping19:17:190
1646799458,0cyclictest10448-21runrttasks20:27:020
81440,0rcu_preempt3-21ksoftirqd/019:03:550
81390,0rcu_preempt19-21ksoftirqd/119:02:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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