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2026-09-16 - 04:29

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 here to display the system's profile data or here to proceed to next system.
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 Wed Sep 16, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22680991012,23cyclictest12-21ksoftirqd/022:35:130
2268099757,13cyclictest12-21ksoftirqd/023:20:120
2270399644,41cyclictest23742-21ssh00:00:142
22711996342,12cyclictest35966irq/58-eth022:15:133
2268099606,46cyclictest14763-21ssh23:55:130
2269399552,7cyclictest131rcu_preempt21:00:151
2269399552,7cyclictest131rcu_preempt21:00:151
2269399544,37cyclictest2201-21ssh23:30:121
2268099501,38cyclictest30565-21ssh21:40:140
2268099501,38cyclictest30565-21ssh21:40:140
2270399485,15cyclictest27346irq/40-dwc2_hso00:30:162
2268099481,37cyclictest29256-21ssh23:45:130
2271199465,26cyclictest35966irq/58-eth022:40:133
2269399463,4cyclictest131rcu_preempt00:30:161
2270399456,15cyclictest27346irq/40-dwc2_hso21:25:162
22693994516,20cyclictest21-21ksoftirqd/120:50:131
2268099454,12cyclictest12-21ksoftirqd/000:05:130
2268099446,22cyclictest12-21ksoftirqd/021:50:130
22680994416,20cyclictest151rcuc/022:25:120
2271199433,21cyclictest35966irq/58-eth000:25:123
2270399430,5cyclictest22344-21ssh21:35:232
2268099427,23cyclictest12-21ksoftirqd/023:05:130
22703994122,13cyclictest0-21swapper/222:45:132
2268099413,32cyclictest21595-21rm21:35:150
2270399403,15cyclictest20758-21grep23:20:282
2268099401,29cyclictest30879-21ssh23:10:130
2271199394,21cyclictest35966irq/58-eth020:15:123
2268099386,4cyclictest131rcu_preempt22:10:140
2269399372,27cyclictest18236-21ssh22:45:141
2269399363,26cyclictest0-21swapper/120:40:141
2269399361,28cyclictest0-21swapper/120:20:151
2268099364,25cyclictest25228-21ssh21:55:120
2269399355,22cyclictest18363-21ssh00:15:131
2269399351,27cyclictest3510-21ssh21:25:141
2268099352,19cyclictest1835-21ssh22:00:140
2271199334,23cyclictest35966irq/58-eth021:40:143
2271199334,23cyclictest35966irq/58-eth021:40:133
2271199332,24cyclictest35966irq/58-eth023:40:133
22711993315,14cyclictest0-21swapper/321:15:133
2269399331,25cyclictest28856-21ssh22:15:131
2268099331,7cyclictest3504-21apt-get21:25:150
2268099331,11cyclictest12-21ksoftirqd/020:15:120
22711993218,10cyclictest0-21swapper/323:10:143
2271199321,17cyclictest35966irq/58-eth000:05:133
2270399325,17cyclictest27346irq/40-dwc2_hso22:15:132
22680993224,3cyclictest0-21swapper/022:40:120
22711993014,10cyclictest0-21swapper/320:00:133
2271199301,17cyclictest35966irq/58-eth000:00:143
2271199301,15cyclictest35966irq/58-eth000:20:123
22711993010,11cyclictest35966irq/58-eth021:50:133
2270399305,14cyclictest27346irq/40-dwc2_hso20:40:142
2268099301,21cyclictest26938-21ssh21:20:130
2270399293,16cyclictest27346irq/40-dwc2_hso20:55:132
2270399292,20cyclictest0-21swapper/200:15:132
2268099294,16cyclictest12-21ksoftirqd/022:55:170
2268099294,16cyclictest12-21ksoftirqd/022:55:170
2271199286,14cyclictest35966irq/58-eth000:15:123
2271199282,12cyclictest35966irq/58-eth019:40:133
2271199281,15cyclictest35966irq/58-eth021:30:143
2270399282,21cyclictest27-21ksoftirqd/221:15:142
2270399282,20cyclictest0-21swapper/221:00:172
2270399282,20cyclictest0-21swapper/221:00:172
2271199273,12cyclictest0-21swapper/300:10:113
2271199272,16cyclictest35966irq/58-eth022:50:123
22711992717,6cyclictest35966irq/58-eth022:45:153
2270399272,11cyclictest0-21swapper/220:20:152
2271199261,16cyclictest35966irq/58-eth023:25:153
2270399265,12cyclictest27346irq/40-dwc2_hso20:45:142
2270399264,11cyclictest27346irq/40-dwc2_hso22:35:102
2270399262,16cyclictest11455-21irqrtprio20:05:192
2270399262,14cyclictest27346irq/40-dwc2_hso23:25:152
2270399261,15cyclictest29411-21fschecks_count23:45:172
2269399262,18cyclictest5787-21ssh23:50:141
2268099265,13cyclictest5423-21ssh22:20:100
2268099264,8cyclictest12-21ksoftirqd/023:30:140
2268099262,18cyclictest27246-21ssh22:50:130
2271199252,14cyclictest35966irq/58-eth022:35:123
2271199252,14cyclictest35966irq/58-eth019:15:133
2270399253,18cyclictest14164-21kthreadcore23:35:242
2270399252,20cyclictest5006-21fschecks_count19:25:162
2270399251,19cyclictest2214-21sh23:30:142
2269399253,15cyclictest9160-21ssh22:40:111
2269399252,18cyclictest7566-21ssh00:25:241
2271199243,15cyclictest0-21swapper/322:29:373
2271199243,13cyclictest35966irq/58-eth021:55:113
2271199241,15cyclictest35966irq/58-eth020:55:143
2270399244,11cyclictest26037-21kthreadcore21:55:182
2270399243,18cyclictest9530-21fschecks_time00:10:162
2270399242,17cyclictest0-21swapper/222:30:362
2270399242,15cyclictest19037-21cat19:40:012
2270399242,13cyclictest24268-21ssh23:40:282
2270399241,7cyclictest727466ssh21:45:142
22703992413,9cyclictest5700-21ssh21:43:442
22703992413,9cyclictest5700-21ssh21:43:442
2270399241,12cyclictest2292166ssh22:29:482
2270399240,12cyclictest320266ssh00:24:362
2269399244,13cyclictest25699-21ssh23:25:151
2269399241,7cyclictest19671-21kthreadcore23:20:201
2269399241,19cyclictest14478-21apt-get19:35:111
2268099244,4cyclictest25676-21apt-get23:25:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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