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2026-10-01 - 17:29

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Thu Oct 01, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811310,0rcu_preempt19-21ksoftirqd/107:46:371
811250,0rcu_preempt19-21ksoftirqd/107:40:151
811240,0rcu_preempt19-21ksoftirqd/107:30:121
811220,0rcu_preempt19-21ksoftirqd/107:20:141
811190,0rcu_preempt19-21ksoftirqd/112:21:131
811190,0rcu_preempt19-21ksoftirqd/107:25:071
811170,0rcu_preempt19-21ksoftirqd/107:35:121
811140,0rcu_preempt3438-21ping08:10:251
811130,0rcu_preempt19-21ksoftirqd/109:50:261
811060,0rcu_preempt19-21ksoftirqd/112:00:301
811050,0rcu_preempt0-21swapper/111:20:101
811040,0rcu_preempt19-21ksoftirqd/110:15:201
811040,0rcu_preempt0-21swapper/112:10:221
811030,0rcu_preempt19-21ksoftirqd/111:12:591
811030,0rcu_preempt19-21ksoftirqd/109:45:041
811010,0rcu_preempt0-21swapper/109:25:581
81980,0rcu_preempt19-21ksoftirqd/111:30:251
81960,0rcu_preempt19-21ksoftirqd/112:34:571
81960,0rcu_preempt19-21ksoftirqd/109:15:211
81960,0rcu_preempt19-21ksoftirqd/109:15:211
81940,0rcu_preempt19-21ksoftirqd/111:50:261
81940,0rcu_preempt19-21ksoftirqd/111:05:401
81940,0rcu_preempt19-21ksoftirqd/111:05:401
81940,0rcu_preempt19-21ksoftirqd/111:01:251
81930,0rcu_preempt19-21ksoftirqd/110:37:021
81890,0rcu_preempt19-21ksoftirqd/110:41:401
81880,0rcu_preempt19-21ksoftirqd/108:08:541
81870,0rcu_preempt19-21ksoftirqd/109:24:191
81870,0rcu_preempt0-21swapper/112:17:021
81860,0rcu_preempt19-21ksoftirqd/111:58:041
81860,0rcu_preempt19-21ksoftirqd/111:42:261
81860,0rcu_preempt19-21ksoftirqd/109:56:331
81850,0rcu_preempt8619-21ssh12:39:051
81850,0rcu_preempt19-21ksoftirqd/112:25:111
81850,0rcu_preempt19-21ksoftirqd/107:55:141
81840,0rcu_preempt0-21swapper/111:29:271
81830,0rcu_preempt19-21ksoftirqd/112:05:261
81810,0rcu_preempt19-21ksoftirqd/107:19:591
81770,0rcu_preempt0-21swapper/109:30:271
81760,0rcu_preempt19-21ksoftirqd/110:04:191
81760,0rcu_preempt19-21ksoftirqd/109:40:031
81760,0rcu_preempt19-21ksoftirqd/109:35:131
81740,0rcu_preempt19-21ksoftirqd/111:35:161
81730,0rcu_preempt19-21ksoftirqd/110:59:321
81720,0rcu_preempt19-21ksoftirqd/107:10:191
81710,0rcu_preempt19-21ksoftirqd/110:24:531
81700,0rcu_preempt19-21ksoftirqd/108:28:411
81700,0rcu_preempt19-21ksoftirqd/108:16:271
81690,0rcu_preempt19-21ksoftirqd/108:20:201
81690,0rcu_preempt0-21swapper/110:31:541
81680,0rcu_preempt19-21ksoftirqd/110:50:071
81680,0rcu_preempt19-21ksoftirqd/110:08:101
81670,0rcu_preempt3-21ksoftirqd/011:00:540
81670,0rcu_preempt19-21ksoftirqd/108:30:221
81670,0rcu_preempt19-21ksoftirqd/108:00:301
81660,0rcu_preempt765-21rngd09:04:291
81660,0rcu_preempt765-21rngd09:04:291
81660,0rcu_preempt19-21ksoftirqd/109:10:251
81650,0rcu_preempt19-21ksoftirqd/110:25:241
81630,0rcu_preempt19-21ksoftirqd/108:55:261
1965199632,0cyclictest0-21swapper/010:30:110
81620,0rcu_preempt19-21ksoftirqd/108:45:231
81620,0rcu_preempt0-21swapper/111:45:231
81610,0rcu_preempt19-21ksoftirqd/110:10:041
81610,0rcu_preempt19-21ksoftirqd/107:53:321
1965199602,0cyclictest0-21swapper/012:08:320
1965199602,0cyclictest0-21swapper/010:00:100
1965199601,0cyclictest5737-21munin-node0
81590,0rcu_preempt19-21ksoftirqd/110:45:431
81590,0rcu_preempt19-21ksoftirqd/109:05:111
81590,0rcu_preempt19-21ksoftirqd/108:38:101
81590,0rcu_preempt13208-21kworker/0:109:10:250
1965199598,0cyclictest2814-21ls12:00:210
1965199594,0cyclictest0-21swapper/012:10:080
1965199592,0cyclictest8595-21ssh11:34:090
19651995916,0cyclictest19517-21ssh09:35:100
81580,0rcu_preempt19-21ksoftirqd/111:15:241
81580,0rcu_preempt11481-21kworker/1:008:50:111
1965199587,0cyclictest4432-21cut09:20:010
1965199583,0cyclictest0-21swapper/010:36:300
1965199582,0cyclictest9897-21seq09:25:180
1965199582,0cyclictest5281-21taskset08:04:540
1965199582,0cyclictest31740-21ssh11:56:450
81570,0rcu_preempt19-21ksoftirqd/108:40:101
1965199574,0cyclictest21969-1kworker/0:3H12:20:030
1965199572,0cyclictest3674-21latency_hist07:59:590
1965199572,0cyclictest22932-21ping07:40:110
1965199572,0cyclictest1375-21runrttasks07:12:150
19651995713,0cyclictest77172sleep009:55:230
1965199571,0cyclictest904-21ssh10:20:410
1965199571,0cyclictest27917-21grep12:25:260
1965199569,0cyclictest0-21swapper/011:11:540
1965199568,0cyclictest9520-21seq11:35:110
1965199563,0cyclictest0-21swapper/008:22:530
1965199562,0cyclictest361-21taskset10:53:140
1965199562,0cyclictest22932-21ping07:28:550
1965199562,0cyclictest12681-21ntp_states08:25:240
1965199562,0cyclictest0-21swapper/010:15:130
19651995614,0cyclictest29231-21ssh11:21:470
19651995611,0cyclictest23470-21runrttasks11:49:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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