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2026-04-10 - 17:06

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 Fri Apr 10, 2026 12:45:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2187899611,47cyclictest11272-21ssh11:00:121
2183599603,46cyclictest29758-21ssh09:40:120
2187899572,42cyclictest8027-21ssh10:40:121
2183599573,37cyclictest20764-21ssh09:35:120
21878995538,9cyclictest0-21swapper/110:05:121
21878995538,9cyclictest0-21swapper/110:05:111
21908995422,21cyclictest28366irq/58-eth010:00:133
2187899536,5cyclictest131rcu_preempt10:00:121
2190099482,25cyclictest24366-21ssh09:55:142
2187899484,32cyclictest31501-21ssh10:35:141
2187899484,32cyclictest31501-21ssh10:35:131
2183599481,9cyclictest131rcu_preempt09:05:130
2190899473,25cyclictest28366irq/58-eth010:30:103
2187899472,4cyclictest131rcu_preempt11:15:121
2190899467,24cyclictest28366irq/58-eth012:20:113
2187899442,8cyclictest0-21swapper/110:55:151
21878994417,21cyclictest21-21ksoftirqd/107:20:121
2190899436,21cyclictest28366irq/58-eth009:40:113
2190899428,22cyclictest28366irq/58-eth009:55:133
2183599422,32cyclictest26277-21ssh09:20:110
2183599414,26cyclictest13553-21ssh10:25:140
2190899403,20cyclictest28366irq/58-eth011:40:123
2190899403,20cyclictest28366irq/58-eth011:40:123
2190899394,22cyclictest28366irq/58-eth009:45:123
21900993918,15cyclictest27-21ksoftirqd/212:15:132
2187899393,20cyclictest3852-21ssh11:50:131
21878993929,3cyclictest0-21swapper/111:10:131
2187899391,27cyclictest20307-21ssh11:05:141
2187899391,13cyclictest11398-21sendmail-msp08:40:011
2190099373,23cyclictest9316-21ssh11:35:122
2187899372,10cyclictest5717-21kthreadcore09:05:201
21835993714,2cyclictest131rcu_preempt07:15:130
21835993714,2cyclictest131rcu_preempt07:15:120
2190099362,16cyclictest8378-21ssh09:10:112
2187899361,12cyclictest30443-21unixbench_singl09:20:271
2187899361,11cyclictest9009-21cut07:30:141
2187899361,11cyclictest11017-21ssh09:10:191
2187899361,10cyclictest27292-21kthreadcore08:55:191
2187899361,10cyclictest17310-21/usr/sbin/munin09:15:231
2187899357,4cyclictest27988-21tail11:25:311
2187899353,9cyclictest31151-21if_err_eth112:05:141
2187899351,9cyclictest29933-21fschecks_count09:40:151
2187899351,9cyclictest25621-21fschecks_time12:20:141
2187899351,9cyclictest24435-21ntp_192.168.11409:35:241
2187899351,9cyclictest19403-21cron12:35:011
2187899351,9cyclictest19403-21cron12:35:001
2187899351,9cyclictest13650-21tr09:30:201
2187899351,11cyclictest19490-21kthreadcore10:45:211
2187899351,10cyclictest7982-21irqcore12:10:181
2187899351,10cyclictest13141-21cron10:25:011
2183599353,23cyclictest12-21ksoftirqd/008:50:120
2187899343,9cyclictest16170-21kthreadcore08:10:181
2187899342,20cyclictest21853-21ssh12:00:111
2187899341,9cyclictest23536-21fschecks_time07:45:141
2187899341,9cyclictest15990-21irqrtprio09:50:181
2187899341,9cyclictest14228-21sed07:35:171
2187899341,9cyclictest12789-21apt-get11:55:101
2187899341,9cyclictest10976-21kernelversion08:05:181
2187899341,8cyclictest9294-21/usr/sbin/munin11:35:301
2187899341,8cyclictest1866-21latency_hist08:30:021
2187899341,7cyclictest18426-21kthreadcore12:15:211
2187899341,11cyclictest23395-21needreboot12:35:241
2187899341,10cyclictest3813-21kthreadcore12:25:231
2187899341,10cyclictest21088-21kthreadcore08:15:201
21878993410,17cyclictest2916-21ssh09:25:141
21878993410,17cyclictest2916-21ssh09:25:131
2190099333,19cyclictest22346irq/40-dwc2_hso12:05:122
2190099331,24cyclictest327-21ssh11:30:112
2187899339,5cyclictest25450-21ntp_kernel_pll_07:10:231
2187899331,9cyclictest6315-21/usr/sbin/munin09:45:121
2187899331,9cyclictest4364-21timerandwakeup07:55:271
2187899331,9cyclictest29452-21latency_hist08:25:001
2187899331,9cyclictest15120-21ntp_states08:40:241
2187899331,8cyclictest31737-21ssh10:15:251
2187899331,7cyclictest8934-21sh11:35:011
2187899331,12cyclictest24475-21diskstats09:55:141
2190899324,15cyclictest28366irq/58-eth010:20:143
2190099322,20cyclictest22346irq/40-dwc2_hso10:15:112
2190099321,22cyclictest5830-21ssh11:15:122
2187899327,3cyclictest0-21swapper/111:46:021
2187899321,9cyclictest8001-21diskmemload10:50:161
2187899321,9cyclictest417-21latency_hist07:55:011
2187899321,9cyclictest23165-21latency_hist07:45:011
2187899321,9cyclictest21953-21tr08:50:171
2187899321,8cyclictest22045-21ntpq11:40:251
2187899321,8cyclictest22045-21ntpq11:40:241
2187899321,8cyclictest14925-21fschecks_count11:20:151
2187899321,8cyclictest13503-21/usr/sbin/munin10:25:261
2187899321,10cyclictest2101-21diskstats08:30:141
2190899313,5cyclictest28366irq/58-eth009:05:123
2190899312,15cyclictest28366irq/58-eth011:10:133
2187899317,4cyclictest0-21swapper/110:30:291
2187899311,8cyclictest27423-21irqrtprio07:15:181
2187899311,8cyclictest27423-21irqrtprio07:15:171
2187899311,10cyclictest32145-21kthreadcore09:00:181
2183599313,21cyclictest7452-21ssh12:10:130
2183599312,25cyclictest2186366ssh12:00:120
2183599311,23cyclictest16410-21ssh12:15:120
2187899301,9cyclictest9877-21usage_EthcTask08:00:311
2187899301,10cyclictest21527-21kthreadcore10:10:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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