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2026-08-28 - 00:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #8

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 rackaslot8s.osadl.org (updated Thu Aug 27, 2026 12:45:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17976216998,25sleep20-21swapper/207:05:072
197092167118,27sleep00-21swapper/007:07:500
197542138101,26sleep30-21swapper/307:08:253
196532137100,26sleep10-21swapper/107:07:061
319562600,2sleep00-21swapper/007:35:210
240632600,3sleep20-21swapper/211:21:402
19592590,3sleep01957-21ssh11:30:010
167102580,1sleep00-21swapper/010:05:170
56472570,2sleep00-21swapper/011:32:100
73252560,2sleep00-21swapper/009:10:110
35272530,2chrt0-21swapper/311:55:003
89242500,1sleep10-21swapper/111:58:391
96192470,1sleep20-21swapper/211:35:172
235212460,1sleep10-21swapper/112:09:271
160722430,2sleep10-21swapper/111:40:131
118882430,1sleep10-21swapper/110:01:171
69912420,2chrt0-21swapper/009:58:110
60152420,1sleep20-21swapper/209:57:122
136042400,2chrt0-21swapper/311:14:473
136042400,2chrt0-21swapper/311:14:473
214062390,2chrt0-21swapper/011:20:140
2015099381,16cyclictest15082-21awk09:40:200
2015099381,16cyclictest15082-21awk09:40:200
2015099381,14cyclictest21042-21cpuspeed_turbos09:45:140
262392360,9sleep122-21ksoftirqd/112:35:111
35702350,1sleep20-21swapper/209:31:482
2015099359,6cyclictest28029-21awk11:00:250
20150993510,6cyclictest16167-21ls08:15:140
20150993510,5cyclictest1131-21cat09:30:170
20150993411,3cyclictest4291-21unixbench-2d09:00:240
20150993410,6cyclictest29147-21date11:50:000
160682340,2sleep30-21swapper/310:05:123
20150993311,6cyclictest12-21ksoftirqd/010:20:120
325562320,2chrt0-21swapper/111:28:251
20150993213,3cyclictest28865-21/usr/sbin/munin08:45:250
20150993211,6cyclictest12-21ksoftirqd/012:20:240
20150993211,6cyclictest12-21ksoftirqd/009:25:120
20150993211,3cyclictest16583-21sh10:52:300
163082320,2sleep00-21swapper/009:15:530
227022310,2sleep20-21swapper/208:30:122
2015099312,10cyclictest30183-21hddtemp_smartct11:50:160
20150993111,3cyclictest6939-21diskmemload10:27:350
20150993111,3cyclictest11374-21sh09:37:470
102272310,1chrt0-21swapper/008:00:160
39332300,3sleep20-21swapper/211:06:552
221502300,3sleep21354-21cron11:45:002
2015099302,8cyclictest9920-21ssh10:00:160
2015099302,7cyclictest5045-21apt-get09:05:120
2015099301,10cyclictest640-21snmpd07:50:130
289762290,1sleep30-21swapper/310:37:593
20151992910,4cyclictest22-21ksoftirqd/111:51:121
2015099291,7cyclictest27982-21ssh12:12:090
2015099291,7cyclictest24300-21ssh10:58:260
20152992819,7cyclictest27380-21ntp_states11:00:202
2015199288,10cyclictest22-21ksoftirqd/111:13:361
2015199288,10cyclictest22-21ksoftirqd/111:13:361
2015199281,13cyclictest22-21ksoftirqd/111:48:451
2015099281,9cyclictest52950irq/141-enp3s0-12:35:100
127692280,3sleep228-21ksoftirqd/210:25:302
2015399271,24cyclictest0-21swapper/307:19:083
2015399271,24cyclictest0-21swapper/307:19:083
2015199275,11cyclictest22-21ksoftirqd/109:50:241
2015199274,12cyclictest22-21ksoftirqd/111:19:371
2015199274,10cyclictest22-21ksoftirqd/110:27:531
20151992711,5cyclictest22-21ksoftirqd/112:02:091
20151992711,4cyclictest22-21ksoftirqd/111:33:571
260482260,1sleep126051-21latency_hist11:00:001
253412260,3sleep225339-21ssh10:35:172
2015299260,23cyclictest23259-21ntp_states07:15:212
2015299260,23cyclictest23259-21ntp_states07:15:212
2015199268,4cyclictest22-21ksoftirqd/110:10:201
2015199261,24cyclictest0-21swapper/107:18:381
2015199261,24cyclictest0-21swapper/107:18:381
20150992620,5cyclictest0-21swapper/007:23:140
2015099261,2cyclictest0-21swapper/007:17:480
2015099261,2cyclictest0-21swapper/007:17:480
2015099261,10cyclictest13866-21apt-get08:10:100
133262260,2sleep30-21swapper/309:14:403
2015399251,1cyclictest0-21swapper/307:23:163
2015299257,12cyclictest141rcu_preempt12:26:522
2015299251,23cyclictest0-21swapper/207:20:102
2015199259,4cyclictest22-21ksoftirqd/111:06:041
2015199257,2cyclictest141rcu_preempt10:35:351
20151992523,1cyclictest0-21swapper/107:22:581
20151992510,4cyclictest22-21ksoftirqd/110:47:381
20151992510,4cyclictest22-21ksoftirqd/109:49:481
288092240,2sleep30-21swapper/312:12:583
2015299243,15cyclictest16097-21ssh10:05:132
2015299242,15cyclictest10792-21apt-get12:00:032
2015199248,9cyclictest22-21ksoftirqd/110:15:411
2015199248,2cyclictest141rcu_preempt09:40:351
2015199248,2cyclictest141rcu_preempt09:40:351
2015199246,3cyclictest141rcu_preempt10:34:491
2015199245,6cyclictest22-21ksoftirqd/109:30:121
2015199245,11cyclictest22-21ksoftirqd/112:33:481
2015199244,2cyclictest141rcu_preempt10:40:091
2015199242,10cyclictest0-21swapper/112:20:451
20151992418,4cyclictest22-21ksoftirqd/110:00:001
20151992414,3cyclictest141rcu_preempt09:23:211
20151992411,4cyclictest22-21ksoftirqd/109:16:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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