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2026-07-12 - 13:11

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 Sun Jul 12, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2169199761,15cyclictest21-21ksoftirqd/120:40:121
2169199756,58cyclictest31399-21ssh00:05:131
2170299593,37cyclictest29487-21ssh23:10:122
2170299581,2cyclictest0-21swapper/223:55:152
2169199563,7cyclictest131rcu_preempt20:20:141
21702995510,21cyclictest27-21ksoftirqd/221:15:152
2169199534,41cyclictest2601-21ssh00:25:141
2168499532,43cyclictest1379-21apt-get20:30:130
2170299523,12cyclictest27346irq/40-dwc2_hso20:50:132
2170299522,31cyclictest0-21swapper/222:55:142
2168499522,2cyclictest0-21swapper/019:30:140
2170299502,44cyclictest930-21snmpd19:15:132
2170299501,5cyclictest0-21swapper/220:25:142
21684995036,12cyclictest12-21ksoftirqd/023:25:130
2168499502,2cyclictest0-21swapper/020:10:100
2169199491,37cyclictest2165-21ssh21:25:101
2168499492,2cyclictest0-21swapper/020:25:130
2169199485,6cyclictest21-21ksoftirqd/100:20:131
2171099474,26cyclictest35966irq/58-eth022:55:143
2170299471,13cyclictest0-21swapper/223:05:132
2168499461,41cyclictest0-21swapper/023:55:150
2168499461,3cyclictest19395-21apt-get20:15:110
2168499461,39cyclictest0-21swapper/023:50:130
2168499452,35cyclictest442-21ssh22:00:140
2170299441,35cyclictest0-21swapper/221:30:122
2168499441,2cyclictest0-21swapper/019:10:120
2168499432,3cyclictest0-21swapper/019:25:140
2168499431,3cyclictest22344-21apt-get00:00:130
2168499430,4cyclictest29266-21apt-get21:40:110
2169199420,33cyclictest15009-21sh23:20:131
2171099419,22cyclictest35966irq/58-eth022:00:153
21710994116,17cyclictest35966irq/58-eth023:25:133
2168499411,36cyclictest0-21swapper/021:45:130
2170299401,11cyclictest18117-21ssh22:10:022
2169199401,32cyclictest22235-21rm22:30:111
2168499406,23cyclictest9358-21ssh22:58:010
2168499402,34cyclictest2589-21apt-get00:25:140
2168499402,31cyclictest0-21swapper/023:10:110
2168499401,35cyclictest0-21swapper/020:55:130
2170299393,26cyclictest24125-21ssh23:25:122
2170299391,8cyclictest3655-21latency_hist19:25:022
2169199392,25cyclictest31242-21apt-get22:35:131
2168499391,8cyclictest31081-21rm21:21:130
2168499391,4cyclictest0-21swapper/020:00:150
2168499391,3cyclictest0-21swapper/022:35:130
2168499391,2cyclictest25885-21apt-get22:50:130
2170299382,8cyclictest0-21swapper/221:25:102
2170299381,26cyclictest432-21ssh22:00:152
2170299381,14cyclictest31674-21grep19:50:292
2170299381,11cyclictest9305-21/usr/sbin/munin21:45:232
2169199386,29cyclictest9444-21ssh22:05:131
2168499383,2cyclictest10986-21apt-get20:40:130
2168499382,6cyclictest0-21swapper/019:45:130
2168499382,6cyclictest0-21swapper/019:45:120
2168499382,3cyclictest11255-21apt-get21:30:130
2168499382,32cyclictest0-21swapper/000:35:150
2168499382,31cyclictest11600-21apt-get00:30:130
2168499381,6cyclictest2555-21proc_pri19:20:280
2168499381,4cyclictest7873-21ssh22:40:130
2168499381,3cyclictest0-21swapper/021:00:120
2170299371,9cyclictest6243-21cat21:05:302
2170299371,9cyclictest11639-21grep23:00:152
2170299371,7cyclictest17065-21fschecks_count22:45:172
2168499371,7cyclictest28988-21ssh23:45:200
2168499371,7cyclictest12089-21timerandwakeup00:10:300
2168499371,4cyclictest0-21swapper/020:05:120
2168499371,3cyclictest0-21swapper/022:05:130
2168499371,3cyclictest0-21swapper/019:50:140
2168499370,8cyclictest23902-21apt-get21:55:170
2171099365,19cyclictest0-21swapper/323:10:113
2170299361,9cyclictest24097-21kthreadcore19:45:192
2170299361,9cyclictest24097-21kthreadcore19:45:182
2170299361,10cyclictest24137-21cut21:55:192
2170299360,9cyclictest28507-21cut00:20:222
2170299360,9cyclictest15146-21kthreadcore22:25:212
2169199362,27cyclictest11281-21ssh21:30:141
2168499361,7cyclictest24785-21sed20:20:190
2168499361,3cyclictest0-21swapper/023:15:140
2168499360,5cyclictest26010-21apt-get00:20:130
2168499360,4cyclictest22231-21apt-get22:30:130
2168499360,4cyclictest10962-21kthreadcore23:35:210
2171099358,16cyclictest0-21swapper/323:55:133
2171099353,19cyclictest35966irq/58-eth021:30:123
2171099351,19cyclictest35966irq/58-eth000:25:143
2170299352,12cyclictest2400-21munin-run21:05:022
2170299351,7cyclictest5248-21unixbench_singl20:30:302
2170299351,6cyclictest17915-21sort20:10:212
2170299351,20cyclictest7613-21sh21:10:142
2170299351,12cyclictest11419-21irqcore20:40:182
2170299351,10cyclictest22257-21ssh22:30:142
2170299350,9cyclictest4502-21usage_EthcTask19:55:322
21691993513,9cyclictest29019-21apt-get20:25:141
2168499351,6cyclictest21333-21ssh21:52:310
2168499351,6cyclictest21333-21ssh21:52:300
2168499351,3cyclictest17036-21apt-get00:15:110
2171099341,19cyclictest35966irq/58-eth019:20:143
2170299348,4cyclictest28095-21tr22:15:182
2170299348,4cyclictest28095-21tr22:15:172
2170299344,10cyclictest29396-21df_inode21:40:152
2170299342,27cyclictest6089-21ssh23:15:152
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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