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2026-09-22 - 14:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, 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 792 highest latencies:
System rack9slot4s (updated Tue Sep 22, 2026 00:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
135759912051145,55cyclictest14143-21grep19:25:170
135769910901070,17cyclictest13968-21ls19:25:141
132252647600,32sleep00-21swapper/019:21:530
132172607561,31sleep10-21swapper/119:21:471
2761221170,2sleep027614-21unixbench_multi00:15:290
283402940,3sleep1201rcuc/120:00:261
233782570,4sleep10-21swapper/100:05:201
1357699449,6cyclictest22-21ksoftirqd/123:25:161
13576994421,4cyclictest22-21ksoftirqd/121:43:111
13576994411,6cyclictest22-21ksoftirqd/120:20:181
19432430,3sleep0111rcuc/020:15:290
13576994321,12cyclictest22-21ksoftirqd/119:50:111
13576994313,5cyclictest22-21ksoftirqd/122:01:221
139222420,9sleep11357699cyclictest22:15:141
46952410,8sleep01357599cyclictest21:50:150
204022410,8sleep01357599cyclictest21:05:220
1357699415,4cyclictest81rcu_preempt22:50:121
1357699405,6cyclictest22-21ksoftirqd/100:05:011
1357699405,4cyclictest81rcu_preempt00:40:131
13576994026,4cyclictest22-21ksoftirqd/123:00:221
1357699401,6cyclictest22-21ksoftirqd/100:10:251
1357699395,4cyclictest81rcu_preempt22:35:291
1357699395,4cyclictest81rcu_preempt22:25:111
1357699395,4cyclictest81rcu_preempt00:50:111
1357699394,4cyclictest81rcu_preempt00:15:111
1357699393,6cyclictest22-21ksoftirqd/100:30:221
13576993919,9cyclictest22-21ksoftirqd/122:08:421
1357699391,7cyclictest22-21ksoftirqd/100:25:131
1357699384,4cyclictest81rcu_preempt23:20:161
1357699384,4cyclictest81rcu_preempt22:40:111
1357699382,5cyclictest22-21ksoftirqd/120:55:231
13576993821,5cyclictest22-21ksoftirqd/121:38:381
1357699381,7cyclictest22-21ksoftirqd/123:45:121
1357699381,7cyclictest22-21ksoftirqd/123:15:121
1357699381,7cyclictest22-21ksoftirqd/122:55:131
1357699381,7cyclictest22-21ksoftirqd/122:10:121
1357699381,7cyclictest22-21ksoftirqd/122:10:121
1357699381,7cyclictest22-21ksoftirqd/121:50:121
1357699381,7cyclictest22-21ksoftirqd/121:05:121
1357699381,6cyclictest22-21ksoftirqd/100:45:181
1357699373,4cyclictest81rcu_preempt22:30:141
13576993722,13cyclictest22-21ksoftirqd/121:20:001
13576993718,5cyclictest22-21ksoftirqd/120:49:191
1357699371,7cyclictest22-21ksoftirqd/121:30:281
1357699371,7cyclictest22-21ksoftirqd/120:35:291
1357699371,7cyclictest22-21ksoftirqd/120:15:111
1357699371,6cyclictest22-21ksoftirqd/123:50:161
1357699371,6cyclictest22-21ksoftirqd/122:20:111
1357699371,6cyclictest22-21ksoftirqd/100:35:241
1357699366,4cyclictest81rcu_preempt21:10:231
1357699363,4cyclictest81rcu_preempt23:05:141
1357699362,4cyclictest81rcu_preempt23:30:151
1357699361,5cyclictest22-21ksoftirqd/119:40:231
13576993615,4cyclictest22-21ksoftirqd/120:30:151
13576993610,4cyclictest81rcu_preempt21:00:261
1357599361,21cyclictest7095-21chrt23:21:060
257652351,4sleep025797-21/usr/sbin/munin22:45:270
1357699356,4cyclictest81rcu_preempt20:05:241
1357699352,4cyclictest81rcu_preempt23:11:331
1357699351,7cyclictest22-21ksoftirqd/123:35:141
1357699351,4cyclictest81rcu_preempt00:20:131
13576993513,12cyclictest81rcu_preempt20:12:451
1357599352,20cyclictest30196-21/usr/sbin/munin20:05:260
277632341,5sleep027817-21/usr/sbin/munin20:00:160
195852340,8sleep01357599cyclictest22:30:170
17622341,9sleep00-21swapper/021:41:490
1357699341,6cyclictest22-21ksoftirqd/121:47:581
116382341,29sleep011676-21df_inode23:35:130
247622331,4sleep011565-21gdbus21:16:270
1357699335,4cyclictest81rcu_preempt23:55:151
1357699332,18cyclictest25918-21df_inode19:55:131
13576993317,4cyclictest22-21ksoftirqd/123:44:061
13576993316,6cyclictest22-21ksoftirqd/119:45:211
13576993314,7cyclictest22-21ksoftirqd/120:25:301
13576993312,4cyclictest22-21ksoftirqd/121:55:301
57842320,21sleep03-21ksoftirqd/020:25:290
195622321,5sleep00-21swapper/019:37:190
1357699321,6cyclictest22-21ksoftirqd/119:35:181
1357599328,5cyclictest2605-21missed_timers23:10:220
1357599327,5cyclictest81rcu_preempt21:45:270
1357599325,11cyclictest0-21swapper/023:15:110
1357599321,5cyclictest81rcu_preempt22:40:210
1357599321,5cyclictest81rcu_preempt20:10:120
1357599321,19cyclictest22622-21chrt22:37:230
13575993210,6cyclictest0-21swapper/000:47:290
13576993116,12cyclictest22-21ksoftirqd/122:45:161
1357599318,12cyclictest6978-21ps21:55:280
1357599316,6cyclictest0-21swapper/021:30:000
1357599313,16cyclictest0-21swapper/020:40:110
1357599311,3cyclictest81rcu_preempt23:45:050
13575993112,6cyclictest10049-21cron20:40:010
1357599311,19cyclictest530-21basename23:05:200
13575993111,6cyclictest22545-21munin-run00:05:000
13575993111,16cyclictest12968-21unixbench_singl22:10:310
13575993111,16cyclictest12968-21unixbench_singl22:10:300
287512301,25sleep028914-21cstates22:55:130
1357699303,4cyclictest22-21ksoftirqd/121:20:121
1357699302,5cyclictest81rcu_preempt19:30:021
1357699301,4cyclictest81rcu_preempt20:50:111
1357699301,4cyclictest81rcu_preempt20:40:161
1357599307,11cyclictest13573-21cyclictest00:20:150
1357599306,12cyclictest16696-21ntp_states20:55:250
1357599305,12cyclictest4615-21timerandwakeup00:40:300
1357599304,4cyclictest81rcu_preempt20:20:290
1357599302,15cyclictest29546-21hddtemp_smartct21:30:220
1357599302,14cyclictest14552-21users23:40:280
13575993013,5cyclictest26457-21ntp_states19:55:230
13575993012,6cyclictest16726-21hddtemp_smartct19:30:170
1357599301,18cyclictest952-21pidof00:31:000
13575993011,6cyclictest16345-21ntpdc22:20:210
1357599301,15cyclictest22535-21python21:10:280
111672301,5sleep00-21swapper/022:05:430
79432291,5sleep00-21swapper/020:32:390
324452291,5sleep00-21swapper/021:38:050
258762291,5sleep00-21swapper/000:10:510
194072291,5sleep00-21swapper/021:04:190
1357599295,14cyclictest81rcu_preempt22:50:290
1357599292,14cyclictest31064-21/usr/sbin/munin00:25:260
1357599292,13cyclictest8478-21perl22:00:170
1357599292,13cyclictest17541-21/usr/sbin/munin23:50:190
13575992911,5cyclictest9044-21taskset00:55:010
1357599291,11cyclictest23991-21cstates19:50:120
13575992910,6cyclictest9803-21diskstats23:30:150
135042291,5sleep00-21swapper/020:46:440
187192281,5sleep00-21swapper/022:25:500
152932281,5sleep00-21swapper/022:19:270
1357699281,4cyclictest81rcu_preempt21:29:191
13575992812,4cyclictest21881-21munin-node19:45:100
1357599281,14cyclictest23479-21/usr/sbin/munin00:05:230
28922271,5sleep00-21swapper/000:35:330
1357599274,8cyclictest25590-21diskstats21:20:150
1357599272,13cyclictest0-21swapper/019:40:200
1357599271,14cyclictest31192-21tr23:00:200
1357599271,14cyclictest15420-21chrt20:52:010
1357599261,14cyclictest20459-21runrttasks23:58:120
1357599261,13cyclictest11038-21snmpd23:28:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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