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2026-05-31 - 20:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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.

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 50 highest latencies:
System rackbslot5s.osadl.org (updated Sun May 31, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1258174996038,18cyclictest1280434-21grep08:10:243
1258168995827,6cyclictest0-21swapper/110:45:001
1258163995242,6cyclictest1296425-21auditctl09:00:010
1258174994924,21cyclictest1277039-21head08:00:273
1258172994936,10cyclictest311ktimers/208:55:122
1258172994840,4cyclictest1317508-21cron10:00:002
1258163994832,12cyclictest121ktimers/009:00:130
1258174994433,7cyclictest1339918-21basename11:05:013
125817499441,38cyclictest1326598-21/usr/sbin/munin10:25:173
1258172994431,9cyclictest311ktimers/209:25:112
1258163994433,8cyclictest0-21swapper/012:30:110
1258174994330,10cyclictest391ktimers/311:30:133
125817499431,4cyclictest0-21swapper/308:45:133
125817499431,37cyclictest1366229-21/usr/sbin/munin12:20:123
125817499431,37cyclictest1316257-21/usr/sbin/munin09:55:153
125817499431,10cyclictest1340151-21apt-get11:05:133
125817499421,4cyclictest0-21swapper/308:25:133
125817499421,38cyclictest1354515-21/usr/sbin/munin11:45:173
125817499421,38cyclictest1329689-21/usr/sbin/munin10:35:273
125817499411,9cyclictest1355904-21apt-get11:50:123
125817499411,4cyclictest0-21swapper/311:25:113
125817499411,4cyclictest0-21swapper/307:55:133
125817499411,37cyclictest1364876-21memory12:15:183
125817499411,37cyclictest1310610-21/usr/sbin/munin09:40:133
125817499411,37cyclictest1287191-21/usr/sbin/munin08:30:273
125817499411,37cyclictest1287191-21/usr/sbin/munin08:30:273
125817499411,37cyclictest1271151-21/usr/sbin/munin07:45:193
125817499411,35cyclictest1363170-21meminfo12:10:183
125817499411,35cyclictest1357723-21diskstats11:55:153
125817499411,35cyclictest1328046-21/usr/sbin/munin10:30:143
125817499411,35cyclictest1290619-21/usr/sbin/munin08:40:243
125817499411,35cyclictest1267793-21/usr/sbin/munin07:35:193
125817499410,7cyclictest1336728-21apt-get10:55:133
1258172994134,4cyclictest1303284-21idleruntime-cro09:20:012
1258172994131,6cyclictest0-21swapper/207:20:012
1258168994132,6cyclictest1361247-21fschecks_time12:05:181
125817499402,35cyclictest1265026-21/usr/sbin/munin07:25:253
125817499401,8cyclictest1335629-21/usr/sbin/munin10:50:223
125817499401,4cyclictest0-21swapper/310:15:143
125817499401,4cyclictest0-21swapper/310:05:133
125817499401,36cyclictest1351636-21/usr/sbin/munin11:35:253
125817499401,36cyclictest1351636-21/usr/sbin/munin11:35:253
125817499401,36cyclictest1315212-21users09:50:253
125817499401,36cyclictest1273121-21/usr/sbin/munin07:50:203
125817499401,35cyclictest1302177-21latency09:15:173
125817499401,35cyclictest1296677-21/usr/sbin/munin09:00:133
125817499401,35cyclictest1293356-21/usr/sbin/munin08:50:153
125817499401,34cyclictest1325039-21memory10:20:193
125817499401,34cyclictest1317878-21/usr/sbin/munin10:00:153
125817499401,34cyclictest1305857-21meminfo09:25:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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