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2025-12-04 - 18:32

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 Thu Dec 04, 2025 12:45:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
187199621,4cyclictest0-21swapper/211:45:142
187199582,4cyclictest0-21swapper/212:35:142
1871995639,12cyclictest0-21swapper/211:05:152
186299501,35cyclictest30720-21ssh11:45:131
186299491,7cyclictest131rcu_preempt08:40:141
185499492,39cyclictest9963-21ssh10:50:130
187199481,12cyclictest0-21swapper/211:20:162
187199466,34cyclictest22728-21ssh11:40:132
187199464,5cyclictest0-21swapper/208:05:132
187199452,7cyclictest0-21swapper/210:25:132
188299435,24cyclictest29566irq/58-eth011:50:133
187199431,10cyclictest0-21swapper/208:45:142
187199423,29cyclictest21789-21ssh12:00:142
185499412,5cyclictest131rcu_preempt09:15:120
187199403,22cyclictest2072-21ssh10:45:132
187199403,22cyclictest2072-21ssh10:45:132
1871994021,12cyclictest530-21usb-storage10:40:132
1871994021,12cyclictest530-21usb-storage10:40:122
187199391,9cyclictest9998-21unixbench_singl08:55:312
187199391,8cyclictest9957-21apt-get10:50:122
186299391,28cyclictest3584-21ssh10:25:151
185499391,34cyclictest21499-21ssh12:20:140
185499391,34cyclictest21499-21ssh12:20:130
187199385,30cyclictest2344-21irqcore07:10:172
187199381,9cyclictest24717-21kthreadcore12:20:222
187199381,9cyclictest24717-21kthreadcore12:20:222
185499381,34cyclictest22704-21ssh09:55:140
187199371,8cyclictest9821-21cut07:15:232
187199371,8cyclictest2994-21wc11:25:292
187199371,8cyclictest22768-21kthreadcore09:10:222
185499373,7cyclictest131rcu_preempt12:05:130
185499372,29cyclictest11006-21ssh09:25:140
187199363,6cyclictest7719-21kthreadcore12:30:232
187199362,9cyclictest6193-21kthreadcore10:05:222
187199361,9cyclictest17665-21sshd11:55:272
187199361,9cyclictest1521-21hwlatdetect08:50:182
187199361,9cyclictest14571-21latency_hist11:35:022
187199361,9cyclictest13238-21hwlatdetect07:55:162
187199361,8cyclictest7416-21apt09:45:012
187199361,8cyclictest7416-21apt09:45:012
187199361,7cyclictest30153-21fschecks_time10:00:152
187199361,7cyclictest13839-21usage_EthcTask08:25:292
187199361,6cyclictest12749-21cat11:10:332
187199361,12cyclictest7532-21cut08:20:232
187199361,12cyclictest31746-21kthreadcore07:40:212
185499363,31cyclictest20398-21ssh10:15:130
187199353,29cyclictest18335-21kworker/u8:009:30:192
187199351,9cyclictest13096-21latency_hist12:15:012
187199351,8cyclictest27465-21/usr/sbin/munin08:10:252
187199351,8cyclictest21265-21kthreadcore08:35:202
187199351,13cyclictest19213-21kthreadcore10:55:222
186299352,29cyclictest5211-21ssh10:05:141
1862993515,11cyclictest0-21swapper/111:55:121
187199342,26cyclictest0-21swapper/207:20:142
187199342,12cyclictest26346irq/40-dwc2_hso09:50:132
187199341,9cyclictest8106-21latency_hist07:50:022
187199341,8cyclictest15470-21users09:00:322
187199341,7cyclictest25527-21apt11:00:132
187199341,7cyclictest19482-21irqrtprio10:35:202
187199341,12cyclictest15970-21sort09:05:192
187199341,12cyclictest15970-21sort09:05:182
187199341,11cyclictest8655-21ssh09:21:102
187199340,8cyclictest31574-21kthreadcore12:05:212
185499343,23cyclictest12-21ksoftirqd/011:50:120
185499342,23cyclictest11059-21ssh10:30:140
1854993417,10cyclictest12-21ksoftirqd/008:15:120
188299332,19cyclictest29566irq/58-eth012:30:153
187199334,4cyclictest25421-21grep09:35:202
187199331,9cyclictest20364-21/usr/sbin/munin10:15:272
187199331,8cyclictest23912-21kthreadcore07:30:212
187199331,6cyclictest27992-21head08:40:312
187199331,5cyclictest16292-21irqcore11:15:202
187199331,3cyclictest26209-21diskstats07:35:152
187199330,8cyclictest11715-21sed10:30:202
1862993323,5cyclictest28156-21sh10:20:171
1862993323,5cyclictest28156-21sh10:20:161
185499333,26cyclictest17690-21ssh10:55:170
1854993324,6cyclictest0-21swapper/011:15:150
185499331,4cyclictest131rcu_preempt09:20:130
188299325,13cyclictest29566irq/58-eth011:35:133
187199321,9cyclictest17155-21grep07:25:192
187199321,8cyclictest849-21kthreadcore08:15:192
187199321,8cyclictest30610-21kthreadcore10:20:242
187199321,8cyclictest30610-21kthreadcore10:20:232
187199321,7cyclictest7763-21/usr/sbin/munin09:45:252
187199321,5cyclictest16989-21grep10:10:302
187199321,25cyclictest28383-21ssh09:15:152
187199320,5cyclictest19919-21ssh11:36:092
1862993221,8cyclictest0-21swapper/112:25:141
187199318,3cyclictest18476-21irqstats08:00:182
187199318,3cyclictest18476-21irqstats08:00:172
187199311,9cyclictest22706-21/usr/sbin/munin09:55:142
187199311,9cyclictest0-21swapper/212:25:102
187199311,8cyclictest13246-21/usr/sbin/munin12:15:242
187199311,8cyclictest10001-21kthreadcore07:50:202
187199311,8cyclictest0-21swapper/209:25:142
186299311,21cyclictest23659-21ssh11:20:171
186299310,28cyclictest17999-21ssh09:30:151
187199301,6cyclictest11772-21ssh11:51:412
186299302,25cyclictest9974-21ssh10:50:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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