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2026-04-25 - 00:49

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 24, 2026 12:45:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14911995816,31cyclictest131rcu_preempt12:15:120
14911995816,31cyclictest131rcu_preempt12:15:110
1492799564,4cyclictest27-21ksoftirqd/212:00:112
14935995528,15cyclictest35966irq/58-eth012:10:133
1492799541,8cyclictest0-21swapper/208:20:112
1493599534,30cyclictest35966irq/58-eth011:45:133
14935995217,15cyclictest35966irq/58-eth010:05:123
1491999501,44cyclictest21040-21apt-get07:50:111
1491999493,37cyclictest13770-21ssh09:35:121
1491999482,42cyclictest0-21swapper/108:30:121
1491999461,25cyclictest7032-21tune2fs11:55:161
1492799451,34cyclictest0-21swapper/210:30:102
1491999452,37cyclictest15787-21apt-get12:00:121
1491999441,34cyclictest24671-21apt-get10:35:141
1491999441,2cyclictest0-21swapper/108:35:121
1491199444,5cyclictest0-21swapper/012:20:130
1491199443,5cyclictest131rcu_preempt10:15:110
1491999431,38cyclictest0-21swapper/108:10:111
1491999431,37cyclictest17460-21apt-get11:25:111
1491199435,24cyclictest3029-21ssh10:05:110
1493599424,22cyclictest35966irq/58-eth010:50:123
1492799422,21cyclictest7017-21ssh11:55:172
1491999421,36cyclictest0-21swapper/110:55:111
1491999413,35cyclictest0-21swapper/108:00:121
1491999412,36cyclictest26432-21ssh10:00:121
1491999411,35cyclictest1610-21apt-get12:10:141
1491999411,2cyclictest0-21swapper/112:05:121
1491999411,27cyclictest13200-21tr11:40:201
1491999411,25cyclictest12807-21sh10:27:031
1492799402,23cyclictest21078-21ssh11:45:132
1491999402,34cyclictest17475-21apt-get08:20:121
1491199402,25cyclictest17345-21ssh09:55:120
1491999393,32cyclictest0-21swapper/112:35:131
1491999393,31cyclictest18738-21apt-get08:55:111
1491999392,34cyclictest10591-21apt-get12:15:121
1491999392,34cyclictest10591-21apt-get12:15:111
1491999391,3cyclictest0-21swapper/109:50:141
1491999391,3cyclictest0-21swapper/109:05:131
1491999391,36cyclictest29459-21apt-get07:25:121
1491999391,25cyclictest11407-21latency_hist07:40:031
1491199392,30cyclictest5513-21ssh12:30:140
1492799387,22cyclictest27-21ksoftirqd/208:55:122
1491999382,33cyclictest0-21swapper/109:45:121
1491999382,33cyclictest0-21swapper/109:45:111
1491999382,27cyclictest9956-21ssh09:15:121
1491999381,24cyclictest8103-21kthreadcore11:00:211
1491999381,22cyclictest6655-21ntp_192.168.11410:05:241
1491999380,3cyclictest22764-21apt-get11:10:121
1491999380,24cyclictest7722-21cat11:35:301
1492799372,3cyclictest131rcu_preempt09:40:112
1491999371,32cyclictest20997-21apt-get10:15:121
1491999371,31cyclictest19239-21ssh10:50:131
1491999371,25cyclictest32247-21unixbench_singl09:25:291
1491999361,2cyclictest0-21swapper/108:05:131
1491999361,2cyclictest0-21swapper/107:30:111
1491999361,25cyclictest481266ssh09:30:141
1491999361,24cyclictest22384-21sh10:32:451
1491999361,22cyclictest30020-21sh11:30:231
1491999361,19cyclictest11707-21ssh12:32:071
1491999360,2cyclictest23623-21apt-get09:00:131
14927993510,21cyclictest27-21ksoftirqd/207:50:112
1491999352,28cyclictest22782-21apt-get09:40:111
1491999351,4cyclictest0-21swapper/110:10:121
1491999351,30cyclictest9233-21kthreadcore11:20:191
1491999351,30cyclictest9233-21kthreadcore11:20:181
1491999351,30cyclictest22621-21if_err_eth008:25:171
1491999351,30cyclictest22621-21if_err_eth008:25:161
1491999351,29cyclictest0-21swapper/107:15:131
1491199351,30cyclictest15807-21ssh12:00:110
1491999341,3cyclictest0-21swapper/107:55:141
1491999341,30cyclictest27729-21latency_hist09:25:021
1491999341,2cyclictest0-21swapper/108:45:121
1491999341,29cyclictest17493-21mailstats08:50:251
1491999341,29cyclictest13771-21apt-get11:05:141
1491999340,4cyclictest17326-21apt-get09:55:101
1492799331,25cyclictest4701-21ssh09:30:112
1491999339,22cyclictest2062-21ssh12:26:331
1491999331,29cyclictest17018-21kthreadcore07:45:191
1491999331,28cyclictest30325-21fschecks_time10:20:161
1491999331,28cyclictest30325-21fschecks_time10:20:151
1491999331,28cyclictest23324-21sshd12:20:231
1491999331,28cyclictest12296-21tr07:40:191
1491999331,28cyclictest10527-21fschecks_time10:45:151
1491999331,21cyclictest0-21swapper/111:52:171
1491199332,23cyclictest17485-21ssh11:25:140
14935993216,10cyclictest35966irq/58-eth009:40:133
1491999321,28cyclictest8060-21timerandwakeup08:40:281
1491999321,28cyclictest2968-21awk11:15:241
1491999321,28cyclictest29217-21sshd07:24:171
1491999321,28cyclictest17189-21users08:15:311
1491999321,20cyclictest7414-21sh10:42:041
1491199329,6cyclictest0-21swapper/008:20:110
1493599313,17cyclictest35966irq/58-eth011:55:123
1493599313,13cyclictest0-21swapper/312:20:133
1492799312,18cyclictest27346irq/40-dwc2_hso07:40:152
1492799311,24cyclictest0-21swapper/209:55:122
1492799311,12cyclictest21003-21ssh10:15:102
1491999310,27cyclictest921-21ssh09:10:121
1491199311,22cyclictest4900-21cut12:10:220
1492799305,16cyclictest27346irq/40-dwc2_hso11:40:122
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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