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2026-06-17 - 19:49

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 Wed Jun 17, 2026 12:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2195499693,52cyclictest13694-21ssh12:10:112
21954996521,21cyclictest27-21ksoftirqd/210:30:132
21954995938,15cyclictest0-21swapper/210:15:122
2193799573,45cyclictest13709-21ssh12:10:120
2193799528,6cyclictest131rcu_preempt07:30:130
2195499513,40cyclictest21329-21ssh10:10:102
2193799491,38cyclictest26161-21ssh09:55:110
21964994841,5cyclictest36066irq/59-eth011:30:123
2194699473,35cyclictest17563-21sh09:15:111
2194699465,30cyclictest18782-21rm11:55:121
21937994629,12cyclictest0-21swapper/011:20:110
2194699434,32cyclictest4597-21ssh12:05:121
2193799432,27cyclictest844-21munin-node12:15:130
21946994115,21cyclictest21-21ksoftirqd/110:35:151
2193799411,29cyclictest30526-21ssh10:15:120
2195499401,10cyclictest24922-21fschecks_time08:20:162
2196499393,26cyclictest35966irq/58-eth009:10:133
2195499391,9cyclictest27787-21kthreadcore11:05:222
21964993820,11cyclictest0-21swapper/309:00:133
2193799381,30cyclictest29716-21ssh10:50:130
2196499372,23cyclictest35966irq/58-eth009:35:143
21946993713,12cyclictest21-21ksoftirqd/110:45:141
21964993619,11cyclictest35966irq/58-eth010:30:133
2196499361,22cyclictest35966irq/58-eth009:25:113
2195499368,8cyclictest0-21swapper/211:30:272
2195499361,8cyclictest13367-21tr11:15:212
2195499361,10cyclictest9087-21irqcore12:25:182
2194699362,26cyclictest17815-21ssh12:30:101
2193799361,9cyclictest15712-21diskstats11:00:160
2193799361,9cyclictest15712-21diskstats11:00:160
2196499353,18cyclictest35966irq/58-eth010:05:123
2195499352,13cyclictest4324-21ntp_states11:45:262
2195499351,10cyclictest29569-21kthreadcore07:15:202
2195499350,15cyclictest23671-21sh11:20:262
2194699356,17cyclictest23939-21ssh11:40:111
2194699355,5cyclictest131rcu_preempt09:30:141
2193799351,9cyclictest6008-21cut09:05:210
2193799351,9cyclictest24379-21processes10:45:270
2193799351,9cyclictest11560-21kthreadcore11:15:180
2193799351,8cyclictest14866-21/usr/sbin/munin11:35:290
2193799351,6cyclictest4128-21latency_hist07:25:010
21937993515,14cyclictest16944-21sh09:50:130
2196499344,20cyclictest35966irq/58-eth010:40:103
2195499342,13cyclictest2917-21kthreadcore11:10:212
2195499341,9cyclictest8834-21kthreadcore09:45:202
2195499341,9cyclictest8701-21cut08:35:192
2193799347,5cyclictest21809-21irqcore10:10:170
2193799347,3cyclictest10616-21kthreadcore10:20:230
2193799346,6cyclictest23746-21idleruntime07:45:160
2193799344,6cyclictest8169-21grep07:25:280
2193799341,9cyclictest5389-21ntp_192.168.11408:30:240
2193799341,9cyclictest29687-21cut07:50:180
2193799341,9cyclictest23574-21switchtime08:15:280
2193799341,9cyclictest1377-21kthreadcore07:55:190
2193799341,7cyclictest4533-21switchtime11:45:280
2193799341,7cyclictest28326-21ntp_192.168.11411:05:240
2193799341,7cyclictest18044-21kthreadcore10:25:200
2193799341,10cyclictest3187-21cron09:25:010
2193799340,7cyclictest2034-21nfs4_client09:00:250
2195499332,4cyclictest0-21swapper/209:50:132
2195499331,7cyclictest930-21snmpd12:01:072
2194699332,20cyclictest573566ssh11:30:121
2193799338,4cyclictest31014-21kthreadcore11:25:210
2193799338,4cyclictest31014-21kthreadcore11:25:210
2193799331,9cyclictest4073-21ssh09:25:160
2193799331,9cyclictest26999-21diskstats07:15:140
2193799331,9cyclictest15601-21unixbench_singl08:41:050
2193799331,7cyclictest5490-21/usr/sbin/munin08:00:280
2193799331,7cyclictest4063-21kthreadcore10:00:190
2193799331,7cyclictest16724-21grep08:45:180
2193799331,7cyclictest14053-21tune2fs07:35:170
2193799331,10cyclictest4696-21df12:05:140
2193799331,10cyclictest26349-21grep08:55:140
2193799331,10cyclictest10236-21sh11:15:010
2196499322,14cyclictest35966irq/58-eth011:35:123
2195499322,8cyclictest27704-21open_inodes11:40:272
2193799327,4cyclictest8014-21diskmemload11:58:050
2193799324,5cyclictest15882-21sh10:05:270
2193799323,6cyclictest16416-21/usr/sbin/munin09:30:270
2193799321,9cyclictest532-21kthreadcore12:20:190
2193799321,9cyclictest15209-21ssh09:12:430
2193799321,9cyclictest11954-21irqcore10:40:150
2193799321,8cyclictest29362-21ssh10:30:260
2193799321,8cyclictest26417-21latency_hist09:20:010
2193799321,8cyclictest19364-21irqstats07:40:170
2193799321,7cyclictest7437-21uname08:35:170
2193799321,7cyclictest15608-21irqcore08:10:190
2193799321,6cyclictest27576-21/usr/sbin/munin11:40:230
2193799321,10cyclictest23233-21kthreadcore07:10:200
2196499313,17cyclictest35966irq/58-eth009:45:133
2195499313,15cyclictest27346irq/40-dwc2_hso09:20:132
2195499311,8cyclictest9085-21/usr/sbin/munin07:30:322
2194699312,18cyclictest21-21ksoftirqd/108:40:141
2194699310,23cyclictest7813-21rm09:45:131
2193799318,4cyclictest25356-21tr09:35:230
2193799316,5cyclictest12977-21kthreadcore08:05:230
2193799311,9cyclictest5830-21df11:30:140
2193799311,9cyclictest27201-21df_inode12:35:150
2193799311,9cyclictest1091-21cut09:40:190
2193799311,8cyclictest32045-21kthreadcore08:25:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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