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2026-08-27 - 18:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 50 highest latencies:
System rack7slot7s.osadl.org (updated Thu Aug 27, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1134729683,9sleep00-21swapper/007:07:060
1129929061,9sleep20-21swapper/207:06:262
1006028673,9sleep30-21swapper/307:05:163
1141528364,15sleep10-21swapper/107:07:591
131912550,0sleep00-21swapper/012:09:150
1166199270,24cyclictest0-21swapper/211:19:492
1166399251,19cyclictest0-21swapper/311:20:133
1166199240,24cyclictest0-21swapper/212:10:572
1165799240,21cyclictest0-21swapper/109:17:471
11663992320,3cyclictest0-21swapper/310:37:043
11661992322,1cyclictest0-21swapper/207:45:142
1165799230,23cyclictest0-21swapper/109:22:031
1165799221,19cyclictest13569-21df_abs08:20:141
1166399210,0cyclictest0-21swapper/310:18:523
1166199210,21cyclictest0-21swapper/212:20:042
1166199210,21cyclictest0-21swapper/211:02:152
11657992120,1cyclictest0-21swapper/111:45:141
1166199200,18cyclictest0-21swapper/209:26:212
11657992016,3cyclictest25-21ksoftirqd/112:32:511
11663991918,1cyclictest0-21swapper/312:37:273
1166199190,19cyclictest0-21swapper/211:39:032
1165799190,16cyclictest0-21swapper/109:56:251
1165499195,7cyclictest16612-21munin-run07:20:000
1166399180,2cyclictest0-21swapper/311:44:073
1166399180,18cyclictest28867-21kworker/3:011:26:333
1165499189,2cyclictest225-21systemd-journal10:40:000
11663991715,2cyclictest0-21swapper/310:54:193
1166399170,17cyclictest28867-21kworker/3:011:07:033
1166199170,2cyclictest0-21swapper/209:50:142
1166199170,17cyclictest0-21swapper/209:12:422
1165799170,17cyclictest0-21swapper/111:18:201
24072160,1sleep20-21swapper/211:43:212
1166399160,4cyclictest0-21swapper/310:10:013
1166399160,4cyclictest0-21swapper/310:10:013
11657991613,2cyclictest1859-21cron09:05:001
1165799160,16cyclictest0-21swapper/112:03:381
11654991611,4cyclictest4257-21diskmemload12:30:210
11663991510,3cyclictest8033-21wc12:05:243
1166199157,5cyclictest537-21snmpd10:38:542
1166199156,5cyclictest2630-21tr11:05:132
1166199155,1cyclictest24911-21apt-get10:40:112
11661991510,4cyclictest25330-21apache210:27:362
1166199150,1cyclictest0-21swapper/212:01:222
1166199150,13cyclictest0-21swapper/212:35:122
1165799155,10cyclictest4257-21diskmemload10:52:181
1165799152,6cyclictest0-21swapper/109:43:561
11657991513,1cyclictest29329-21open_inodes09:25:221
1165799150,1cyclictest0-21swapper/112:06:121
11654991514,1cyclictest0-21swapper/010:55:310
11654991511,3cyclictest24865-21mailstats12:15:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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