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2026-08-23 - 21:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Sun Aug 23, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119559221090,4sleep13056-21PK-Backend07:15:021
139099830,64rtkit-daemon0-21swapper/307:05:243
119311428239,14sleep10-21swapper/107:06:481
119305628039,14sleep00-21swapper/007:06:040
119188826643,14sleep20-21swapper/207:05:082
12776162570,4sleep13056-21PK-Backend11:05:201
12776162570,4sleep13056-21PK-Backend11:05:191
11938862570,4sleep0161rcuc/007:10:130
12486902500,2sleep20-21swapper/209:45:002
12896562370,3sleep30-21swapper/311:40:193
12854162350,4sleep00-21swapper/011:30:010
12570262340,6sleep234-21ksoftirqd/210:05:222
119352499340,18cyclictest1251853-21taskset09:52:233
119352499330,21cyclictest1308109-21munin-run12:35:003
119352499321,18cyclictest1285410-21latency_hist11:30:013
119352499310,18cyclictest0-21swapper/308:58:303
119352499310,16cyclictest1246599-21taskset09:36:573
119352499310,15cyclictest1259394-21date10:15:003
119352499300,28cyclictest436-20systemd-journal10:40:003
119352499300,18cyclictest0-21swapper/311:34:283
119352499300,18cyclictest0-21swapper/311:07:493
119352499300,18cyclictest0-21swapper/311:07:493
119352499300,16cyclictest2156-21gnome-shell09:33:093
119352499300,16cyclictest0-21swapper/309:41:083
119352499300,16cyclictest0-21swapper/307:43:353
119352499291,15cyclictest1225786-21apt08:40:113
119352499290,17cyclictest0-21swapper/311:15:393
119352499290,17cyclictest0-21swapper/308:38:003
119352499290,16cyclictest1195088-21sshd07:14:123
119352499280,17cyclictest0-21swapper/308:45:503
119352499280,16cyclictest0-21swapper/311:58:503
119352499280,16cyclictest0-21swapper/310:40:263
119352499280,16cyclictest0-21swapper/307:53:373
119352499280,15cyclictest1293937-21latency_hist11:55:013
119352499271,24cyclictest1210845-21ntp_kernel_pll_07:55:193
119352499271,15cyclictest0-21swapper/312:18:353
1193524992710,15cyclictest1201198-21wc07:30:003
119352499270,16cyclictest0-21swapper/309:48:373
139099260,18rtkit-daemon0-21swapper/208:20:212
139099260,18rtkit-daemon0-21swapper/208:20:212
119352499264,11cyclictest0-21swapper/309:06:113
1193524992612,12cyclictest1217796-21ntp_states08:15:203
1193515992618,6cyclictest1271412-21perf10:50:001
119352499256,16cyclictest11959332sleep307:15:143
119352499253,20cyclictest1218998-21cstates08:20:133
119352499253,20cyclictest1218998-21cstates08:20:133
1193524992520,4cyclictest0-21swapper/309:56:513
119352499251,21cyclictest1221383-21python308:25:203
119352499250,23cyclictest0-21swapper/312:20:113
13015132240,4sleep13056-21PK-Backend12:15:131
12750942240,2sleep30-21swapper/311:00:003
119352499247,15cyclictest1207395-21cat07:45:203
119352499241,21cyclictest2156-21gnome-shell07:33:543
1193524992412,10cyclictest1237178-21ntp_states09:10:203
119352499240,22cyclictest1895067-21snapd10:03:433
119352499240,22cyclictest1288022-21ntp_states11:35:193
119352499240,22cyclictest1272171-21kernelversion10:50:183
139099230,15rtkit-daemon0-21swapper/207:15:202
119352499238,13cyclictest1261348-21cat10:20:133
119352499232,19cyclictest1282564-21uname11:20:163
1193524992315,6cyclictest1212720-21python308:00:213
1193524992312,10cyclictest1232947-21/usr/sbin/munin09:00:163
119352499231,20cyclictest1211-21kerneloops08:08:103
1193524992311,11cyclictest1-21systemd08:55:003
1193524992311,10cyclictest1199405-21idleruntime-cro07:24:593
119352499230,22cyclictest1305491-21sed12:25:173
119352499230,1cyclictest0-21swapper/310:45:593
119352499230,1cyclictest0-21swapper/309:25:223
1193515992311,10cyclictest1260415-21python310:15:211
119350799230,21cyclictest1295679-21munin-run12:00:000
139099220,14rtkit-daemon0-21swapper/209:00:212
12123342220,9chrt13-21ksoftirqd/008:00:170
119352499229,11cyclictest1240389-21cstates09:20:133
119352499228,12cyclictest436-20systemd-journal12:10:013
119352499228,12cyclictest1203738-21cat07:35:173
119352499227,13cyclictest1308369-21cpu12:35:123
119352499226,14cyclictest1299973-21expr12:10:123
119352499221,19cyclictest1278973-21df11:10:143
119352499220,21cyclictest1256513-21basename10:05:163
119352499220,21cyclictest1-21systemd11:50:003
119352499220,20cyclictest1238565-21grep09:15:153
119352499220,20cyclictest1216768-21cron08:15:003
1193515992220,1cyclictest3056-21PK-Backend07:57:521
1193515992220,1cyclictest0-21swapper/110:36:501
1193515992219,2cyclictest3056-21PK-Backend10:24:461
1193515992219,2cyclictest3056-21PK-Backend09:53:431
1193515992219,2cyclictest3056-21PK-Backend09:29:091
1193515992219,2cyclictest3056-21PK-Backend08:39:071
1193515992219,2cyclictest3056-21PK-Backend07:33:181
1193515992219,1cyclictest3056-21PK-Backend11:43:481
119351599220,20cyclictest3056-21PK-Backend12:07:411
119351599220,20cyclictest3056-21PK-Backend08:56:311
119351599220,20cyclictest3056-21PK-Backend08:16:231
119351599220,20cyclictest3056-21PK-Backend07:20:191
1193507992220,1cyclictest0-21swapper/007:55:100
119350799220,21cyclictest0-21swapper/010:04:000
12497092210,8sleep2331rcuc/209:45:212
119352499212,15cyclictest1275150-21apt11:00:123
1193524992119,1cyclictest0-21swapper/308:30:063
1193524992116,4cyclictest0-21swapper/310:15:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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