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2026-06-12 - 01:10

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 Thu Jun 11, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
190909121180,3sleep10-21swapper/107:45:161
189972521160,3sleep00-21swapper/007:20:000
200743221050,3sleep10-21swapper/112:25:001
19513302940,3sleep10-21swapper/109:45:011
189541827640,13sleep30-21swapper/307:08:063
189422727042,20sleep10-21swapper/107:05:131
189449026746,14sleep00-21swapper/007:05:170
189499626544,13sleep20-21swapper/207:05:262
20046972550,1chrt2004698-21/usr/sbin/munin12:15:163
20017332460,2sleep33056-21PK-Backend12:05:223
20017332460,2sleep33056-21PK-Backend12:05:223
19015422460,4sleep33056-21PK-Backend07:25:003
20125622400,1sleep12012561-21awk12:40:001
139099400,3rtkit-daemon0-21swapper/012:35:060
139099390,3rtkit-daemon0-21swapper/011:52:360
19885492360,4sleep23056-21PK-Backend11:30:122
189570799359,14cyclictest1095-21runrttasks09:12:022
1895707993214,16cyclictest1964925-21timerandwakeup10:20:222
1895707993113,16cyclictest1920744-21cron08:20:002
19072642300,6sleep10-21swapper/107:40:141
1895707993014,14cyclictest1924214-21latency_hist08:30:012
1895709992910,17cyclictest2008258-21cut12:25:183
1895709992910,17cyclictest1972954-21expr10:45:123
189570799292,7cyclictest82332-21update-manager12:21:312
189570799292,24cyclictest0-21swapper/209:25:122
189570799292,10cyclictest2009345-21apt12:30:112
1895707992910,17cyclictest2008245-21grep12:25:172
189570799290,7cyclictest0-21swapper/210:50:112
1895707992811,15cyclictest1934868-21cron08:59:592
189570799279,16cyclictest2003311-21sed12:10:222
189570799278,17cyclictest2000850-21cstates12:05:132
189570799278,17cyclictest2000850-21cstates12:05:132
189570799275,6cyclictest436-20systemd-journal09:34:552
189570999260,4cyclictest1-21systemd08:35:003
189570799267,17cyclictest1974184-21sed10:50:012
189570799267,17cyclictest0-21swapper/209:59:262
189570799267,17cyclictest0-21swapper/209:36:082
1895707992619,6cyclictest0-21swapper/211:05:142
189570799261,6cyclictest1915778-21/usr/sbin/munin08:05:172
1895702992615,6cyclictest141rcu_preempt11:59:480
139099260,4rtkit-daemon1389-21rtkit-daemon11:03:060
139099260,4rtkit-daemon1389-21rtkit-daemon11:03:050
139099260,4rtkit-daemon1389-21rtkit-daemon10:08:361
139099260,4rtkit-daemon1389-21rtkit-daemon09:58:161
139099260,4rtkit-daemon1389-21rtkit-daemon09:00:340
139099260,4rtkit-daemon1389-21rtkit-daemon08:49:041
139099260,4rtkit-daemon1389-21rtkit-daemon07:38:461
19182152250,6sleep00-21swapper/008:10:160
189570999258,16cyclictest1975086-21grep10:50:173
189570999258,15cyclictest2010808-21latency_hist12:35:013
189570999258,15cyclictest1999405-21grep12:00:183
1895709992511,11cyclictest3056-21PK-Backend11:31:293
189570999250,19cyclictest3056-21PK-Backend08:45:173
189570799256,3cyclictest20123172chrt12:37:172
189570799253,4cyclictest0-21swapper/207:37:482
189570799253,19cyclictest1951001-21apt-get09:45:002
189570799252,8cyclictest1903078-21dump-pmu-power07:30:002
189570799251,4cyclictest0-21swapper/208:30:122
1895707992510,13cyclictest1982941-21apt-key11:15:002
189570799250,18cyclictest0-21swapper/207:51:022
1895704992513,8cyclictest2267-21packagekitd09:45:041
139099250,4rtkit-daemon1389-21rtkit-daemon11:28:171
139099250,4rtkit-daemon1389-21rtkit-daemon08:38:521
139099250,4rtkit-daemon1389-21rtkit-daemon08:25:011
19952202240,3sleep23056-21PK-Backend11:50:012
19286222240,3sleep00-21swapper/008:40:160
189570999247,15cyclictest1896023-21cpuspeed_turbos07:10:123
189570999243,19cyclictest1909632-21timerwakeupswit07:45:223
189570999241,5cyclictest436-20systemd-journal12:21:313
1895709992413,10cyclictest1944052-21/usr/sbin/munin09:25:153
189570999240,8cyclictest2011226-21cpuspeed_turbos12:35:123
189570999240,22cyclictest3056-21PK-Backend07:51:023
189570999240,22cyclictest1916384-21memory08:05:163
189570799247,15cyclictest1958817-21cpuspeed_turbos10:05:112
189570799247,15cyclictest0-21swapper/209:08:062
189570799247,15cyclictest0-21swapper/209:08:052
189570799247,15cyclictest0-21swapper/208:05:002
189570799247,15cyclictest0-21swapper/208:04:592
189570799246,3cyclictest19636142chrt10:19:182
189570799246,3cyclictest19293502chrt08:41:022
189570799245,5cyclictest883-21dbus-daemon09:05:012
189570799245,17cyclictest2156-21gnome-shell08:21:092
189570799240,8cyclictest436-20systemd-journal08:54:552
189570799240,7cyclictest1976494-21hddtemp_smartct10:55:152
189570799240,7cyclictest1961933-21perf10:15:002
189570499241,21cyclictest1317-21systemd08:43:251
139099240,4rtkit-daemon1389-21rtkit-daemon10:38:391
139099240,4rtkit-daemon1389-21rtkit-daemon10:19:031
139099240,4rtkit-daemon1389-21rtkit-daemon09:28:190
189570999239,12cyclictest1914901-21processes08:00:213
189570999239,12cyclictest1914901-21processes08:00:213
189570999237,14cyclictest1902165-21latency07:25:163
189570999231,17cyclictest1951005-21perf09:45:003
189570999230,21cyclictest3056-21PK-Backend11:05:123
189570999230,18cyclictest3056-21PK-Backend09:03:153
189570799236,15cyclictest0-21swapper/211:16:162
189570799235,4cyclictest1906840-21sshd07:40:072
189570799234,17cyclictest0-21swapper/210:39:232
189570799233,3cyclictest0-21swapper/212:16:272
189570799233,3cyclictest0-21swapper/211:39:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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