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2025-12-05 - 21:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack7slot4s.osadl.org (updated Fri Dec 05, 2025 12:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
85799534,45cyclictest13404-21ssh11:20:130
85799514,42cyclictest3656-21ssh11:35:100
857994630,10cyclictest0-21swapper/009:40:130
87599451,36cyclictest26666-21ssh09:20:112
86799452,28cyclictest24865-21ssh12:30:141
85799452,36cyclictest24082-21ssh11:05:130
88399444,24cyclictest29566irq/58-eth010:35:133
88399442,26cyclictest29566irq/58-eth010:05:143
875994320,15cyclictest27-21ksoftirqd/210:25:132
86799432,33cyclictest5819-21rm10:10:131
87599422,21cyclictest17197-21ssh12:05:152
87599421,25cyclictest7620-21ssh09:50:122
86799421,29cyclictest8591-21ssh12:20:131
88399413,27cyclictest29566irq/58-eth011:15:133
883994116,14cyclictest29566irq/58-eth011:35:113
857994114,20cyclictest12-21ksoftirqd/012:10:140
88399403,19cyclictest29566irq/58-eth009:25:133
875994025,9cyclictest4357-21ssh11:12:312
857994023,13cyclictest0-21swapper/009:45:120
87599393,27cyclictest13573-21ssh10:15:132
87599391,24cyclictest27-21ksoftirqd/210:45:142
875993817,18cyclictest27-21ksoftirqd/212:10:152
88399371,21cyclictest29566irq/58-eth011:55:133
867993716,10cyclictest844-21cyclictest07:55:121
86799371,4cyclictest131rcu_preempt11:45:151
85799373,23cyclictest27083-21ssh10:45:140
87599362,27cyclictest29399-21cat09:40:312
85799363,20cyclictest842-21munin-node10:15:130
883993524,6cyclictest29566irq/58-eth011:30:153
86799358,17cyclictest21-21ksoftirqd/110:00:161
85799352,27cyclictest468-21ssh12:35:110
85799351,29cyclictest19358-21ssh10:40:110
88399342,17cyclictest29566irq/58-eth007:25:133
88399341,19cyclictest29566irq/58-eth012:25:153
86799333,25cyclictest9793-21ssh12:00:111
88399325,12cyclictest29566irq/58-eth011:05:133
883993213,13cyclictest0-21swapper/310:45:143
87599323,18cyclictest32506-21ssh09:45:122
87599321,22cyclictest0-21swapper/208:10:122
86799323,19cyclictest20753-21ssh11:25:141
86799323,18cyclictest30724-21ssh10:05:151
883993115,11cyclictest29566irq/58-eth011:25:143
88399311,14cyclictest29566irq/58-eth012:10:153
87599317,12cyclictest844-21cyclictest10:10:112
87599312,22cyclictest14618-21ssh10:56:302
88399303,14cyclictest29566irq/58-eth009:35:113
88399302,17cyclictest0-21swapper/309:34:363
87599302,22cyclictest4555-21cat12:15:302
87599302,22cyclictest24506-21ssh12:30:012
86799302,22cyclictest30112-21ssh09:41:311
88399292,15cyclictest29566irq/58-eth011:40:123
87599299,11cyclictest27-21ksoftirqd/210:40:112
87599294,18cyclictest26346irq/40-dwc2_hso07:40:132
87599282,20cyclictest0-21swapper/211:05:142
87599281,12cyclictest23055-21ssh10:00:162
86799283,19cyclictest24101-21ssh11:05:141
88399273,15cyclictest0-21swapper/311:12:313
883992711,11cyclictest29566irq/58-eth010:00:173
87599273,20cyclictest0-21swapper/209:39:312
87599272,20cyclictest0-21swapper/209:32:302
875992711,12cyclictest629-21Async14:00:482
86799273,18cyclictest201rcuc/111:30:151
857992720,3cyclictest28879-21ssh10:25:120
88399263,15cyclictest0-21swapper/312:15:303
88399262,14cyclictest29566irq/58-eth007:40:103
87599269,9cyclictest18917-21cron09:15:012
87599263,13cyclictest26346irq/40-dwc2_hso11:40:122
87599261,15cyclictest0-21swapper/208:55:112
875992611,11cyclictest0-21swapper/211:25:172
87599260,8cyclictest17056-21fschecks_count11:00:162
867992617,3cyclictest0-21swapper/109:10:111
85799262,19cyclictest11844-21ssh10:35:140
85799262,18cyclictest5964-21ssh11:15:150
88399252,11cyclictest0-21swapper/312:04:303
88399251,14cyclictest0-21swapper/309:40:123
87599252,16cyclictest26346irq/40-dwc2_hso08:25:132
87599252,16cyclictest0-21swapper/211:35:122
87599251,14cyclictest30728-21ssh10:05:152
86799252,18cyclictest15568-21ssh09:33:301
85799252,3cyclictest131rcu_preempt09:35:100
85799251,18cyclictest24396-21ssh11:25:260
85799251,11cyclictest13055-21tr07:40:180
88399242,17cyclictest0-21swapper/310:19:423
87599244,14cyclictest11161-21diskmemload12:35:012
87599241,18cyclictest467-21diskmemload12:35:112
86799244,16cyclictest4211-21ssh10:30:121
86799242,19cyclictest6477-21ssh12:17:291
86799242,16cyclictest1928-21ssh09:25:151
85799246,3cyclictest131rcu_preempt10:20:130
88399239,9cyclictest29566irq/58-eth009:50:123
87599238,5cyclictest28556-21sh10:25:012
87599232,16cyclictest26346irq/40-dwc2_hso10:35:142
875992311,9cyclictest0-21swapper/208:40:232
87599231,16cyclictest0-21swapper/207:30:052
86799231,16cyclictest15401-21ssh09:55:151
86799231,16cyclictest15401-21ssh09:55:141
85799237,4cyclictest131rcu_preempt09:55:150
85799237,4cyclictest131rcu_preempt09:55:150
85799232,15cyclictest12-21ksoftirqd/008:55:110
87599225,10cyclictest23170-21sh11:45:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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