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2026-08-20 - 08:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Thu Aug 20, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12992211895,18sleep00-21swapper/019:05:490
11929211594,16sleep20-21swapper/219:05:072
13469211087,18sleep30-21swapper/319:06:483
13669210089,6sleep10-21swapper/119:09:231
244872790,0sleep20-21swapper/200:23:062
274602760,1sleep1221ktimersoftd/121:05:001
7542740,0sleep20-21swapper/221:13:302
251212720,0sleep20-21swapper/222:11:032
274422700,0sleep20-21swapper/221:40:162
255242490,1sleep025522-21ssh22:11:130
1374899253,20cyclictest0-21swapper/121:25:121
1374899252,9cyclictest32269-21ssh23:25:111
13750992313,2cyclictest0-21swapper/323:25:103
1375099230,21cyclictest0-21swapper/321:25:113
13748992218,2cyclictest25590-21kworker/u8:121:24:051
1374899221,18cyclictest29293-21diskmemload21:40:111
1374899220,2cyclictest0-21swapper/100:10:121
1374799220,2cyclictest0-21swapper/022:45:130
1374899202,16cyclictest207150irq/24-eth100:00:141
13748992015,3cyclictest207150irq/24-eth100:35:121
143212190,0sleep00-21swapper/021:26:310
207992170,1sleep120800-21munin-node1
1375099162,7cyclictest0-21swapper/321:03:013
1374999161,13cyclictest0-21swapper/200:26:232
1374899161,3cyclictest0-21swapper/123:56:401
1374899161,3cyclictest0-21swapper/123:00:431
1374899161,3cyclictest0-21swapper/120:20:151
13748991611,4cyclictest0-21swapper/123:54:291
1374899161,13cyclictest29628-21apt-get21:10:121
1374899161,13cyclictest18077-21sendmail-mta23:43:161
1374899161,13cyclictest1192-21sendmail-mta22:54:391
1374799160,14cyclictest5806-21ntp_states23:30:150
1374999151,3cyclictest5943-21ssh21:18:402
13749991510,3cyclictest29293-21diskmemload22:55:132
1374899152,7cyclictest0-21swapper/120:35:001
13748991512,2cyclictest0-21swapper/123:10:351
1374899151,12cyclictest17154-21sh23:09:521
13748991510,3cyclictest18974-21chrt21:31:091
13748991510,3cyclictest0-21swapper/122:00:131
1374899150,13cyclictest0-21swapper/122:47:231
1374799150,13cyclictest0-21swapper/023:41:350
1374799150,13cyclictest0-21swapper/000:00:150
312752140,1sleep2301ktimersoftd/222:17:332
312752140,1sleep2301ktimersoftd/222:17:322
273732140,2sleep10-21swapper/122:14:041
161242140,2sleep029293-21diskmemload22:01:480
1375099141,11cyclictest20025-21ssh00:18:463
1375099140,2cyclictest0-21swapper/321:16:013
1375099140,12cyclictest0-21swapper/321:30:133
1374999141,12cyclictest14341-21apt-get23:40:042
1374999141,11cyclictest7479-21sendmail-mta21:54:382
1374999141,11cyclictest0-21swapper/221:32:312
1374999140,2cyclictest0-21swapper/200:36:082
1374999140,12cyclictest31413-21ssh23:24:122
1374999140,12cyclictest22664-21ssh23:47:422
1374899142,7cyclictest1183-21copy20:00:001
1374899141,3cyclictest5600-21ssh21:50:531
13748991411,2cyclictest0-21swapper/121:55:191
13748991411,2cyclictest0-21swapper/100:32:201
13748991410,2cyclictest0-21swapper/123:20:111
1374899140,3cyclictest5502-21ssh22:57:021
1374899140,12cyclictest24534-21ssh21:37:171
1374899140,12cyclictest0-21swapper/123:37:431
1374899140,12cyclictest0-21swapper/119:15:111
13747991411,2cyclictest0-21swapper/023:55:550
13747991411,2cyclictest0-21swapper/021:54:450
13747991411,2cyclictest0-21swapper/000:37:160
13747991411,2cyclictest0-21swapper/000:11:160
1374799140,2cyclictest23404-21ssh22:42:250
1374799140,2cyclictest0-21swapper/022:36:150
1374799140,13cyclictest12122-21ssh22:30:460
1374799140,13cyclictest0-21swapper/023:04:250
1374799140,13cyclictest0-21swapper/022:54:050
1374799140,12cyclictest0-21swapper/023:28:340
1374799140,12cyclictest0-21swapper/021:41:480
57572131,3sleep15501-21apt-get22:25:051
52532130,1sleep00-21swapper/021:17:380
16902130,2sleep20-21swapper/221:47:032
13750991310,2cyclictest0-21swapper/300:38:213
13750991310,2cyclictest0-21swapper/300:30:563
13750991310,2cyclictest0-21swapper/300:26:283
13750991310,2cyclictest0-21swapper/300:24:593
1375099130,11cyclictest0-21swapper/321:10:133
1374999131,10cyclictest16640-21awk22:35:192
13749991310,2cyclictest0-21swapper/223:26:042
13749991310,2cyclictest0-21swapper/223:03:342
13749991310,2cyclictest0-21swapper/222:06:202
13749991310,2cyclictest0-21swapper/222:04:102
13749991310,2cyclictest0-21swapper/221:39:542
13749991310,2cyclictest0-21swapper/220:45:102
13749991310,2cyclictest0-21swapper/200:07:122
1374999130,2cyclictest20766-21ssh23:12:542
1374999130,2cyclictest19107-21ssh00:17:222
1374999130,2cyclictest0-21swapper/223:57:432
1374999130,2cyclictest0-21swapper/222:33:322
1374999130,12cyclictest29293-21diskmemload23:07:042
1374899132,6cyclictest0-21swapper/122:40:001
1374899131,3cyclictest0-21swapper/119:51:001
1374899131,10cyclictest0-21swapper/123:30:111
13748991310,2cyclictest1998-21kworker/u8:022:22:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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