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2026-04-10 - 15:35

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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 rack5slot3s.osadl.org (updated Fri Apr 10, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
85252238164,24sleep30-21swapper/307:07:443
84942204166,25sleep20-21swapper/207:07:182
85582202165,24sleep10-21swapper/107:08:091
84072201165,24sleep00-21swapper/007:06:110
121132700,1sleep20-21swapper/210:55:162
8800996965,2cyclictest29853-21diskmemload11:33:552
8800996965,2cyclictest29853-21diskmemload11:33:542
283492560,2sleep230-21rcuc/210:20:012
128782490,1sleep012879-21uname07:15:190
80112420,1sleep20-21swapper/212:00:102
879599314,13cyclictest6864-40dnf09:30:171
99422300,3sleep230-21rcuc/209:35:222
878999291,20cyclictest25863-21kworker/0:010:28:350
8795992816,3cyclictest0-21swapper/110:27:311
879599281,15cyclictest0-21swapper/112:31:181
44522280,5sleep34456-21cpuspeed_turbos09:25:123
879599279,7cyclictest10663-21kworker/u8:109:50:021
879599272,21cyclictest16662-21munin-run08:40:011
879599271,11cyclictest5330-21turbostat.cron11:55:011
3992270,3sleep121-21rcuc/109:15:161
880599262,9cyclictest0-21swapper/309:43:413
878999268,15cyclictest14482-21perf08:35:010
878999261,19cyclictest23097-21kworker/0:208:58:260
878999260,19cyclictest6683-21kworker/0:010:43:400
878999260,19cyclictest28120-21kworker/0:110:22:190
878999260,19cyclictest28120-21kworker/0:110:22:190
878999260,19cyclictest13155-21kworker/0:211:04:150
880599250,7cyclictest0-21swapper/309:05:173
879599252,15cyclictest21036-21sshd08:49:561
878999251,17cyclictest19991-21kworker/0:311:27:390
312092250,3sleep00-21swapper/011:40:010
150932250,2sleep339-21rcuc/307:20:193
880599241,4cyclictest0-21swapper/310:18:253
879599241,3cyclictest0-21swapper/110:44:131
879599241,17cyclictest0-21swapper/110:14:331
879599240,2cyclictest87550irq/128-enp1s0-12:35:121
878999242,9cyclictest20683-21kworker/0:312:34:570
878999242,12cyclictest25863-21kworker/0:010:19:430
19512240,4sleep3401ktimersoftd/308:05:153
880599239,3cyclictest301652idleruntime07:55:163
880599231,4cyclictest0-21swapper/312:28:103
880599231,10cyclictest808-21snmpd10:07:383
8795992310,11cyclictest3250-21kworker/u8:207:27:451
8795992310,11cyclictest20382-21kworker/u8:008:52:441
878999237,8cyclictest17950-21kworker/0:207:35:150
39092231,2sleep00-21swapper/008:10:130
153972230,2sleep20-21swapper/209:50:132
15172231,18sleep21589-21awk10:30:172
880599221,12cyclictest4427-21ntp_states11:50:203
880599221,11cyclictest910-21systemd-logind08:40:143
880099227,4cyclictest214112sh11:15:212
880099225,10cyclictest22625-40dnf12:31:192
879599228,9cyclictest0-21swapper/110:01:461
879599226,15cyclictest0-21swapper/109:05:151
879599221,18cyclictest9137-21ls12:00:221
879599221,18cyclictest8675-21perl08:20:161
879599221,16cyclictest0-21swapper/110:18:511
879599221,15cyclictest0-21swapper/112:25:511
879599221,15cyclictest0-21swapper/111:40:451
879599221,13cyclictest0-21swapper/109:10:171
879599221,13cyclictest0-21swapper/109:10:171
879599221,11cyclictest0-21swapper/111:30:301
879599221,11cyclictest0-21swapper/111:30:301
8795992210,4cyclictest16125-21cat07:25:021
878999221,9cyclictest31953-21kworker/0:109:17:390
878999221,10cyclictest20457-21perf07:35:000
878999220,8cyclictest29195-21kworker/0:307:59:150
880599219,3cyclictest14141-21munin-run12:15:013
880599218,4cyclictest0-21swapper/311:30:413
880599218,4cyclictest0-21swapper/311:30:413
880599215,2cyclictest87350irq/126-enp1s0-11:01:433
880599213,8cyclictest0-21swapper/309:21:073
880599212,5cyclictest0-21swapper/310:10:253
880599211,11cyclictest0-21swapper/311:49:273
880599211,10cyclictest0-21swapper/312:15:333
880599210,5cyclictest0-21swapper/310:23:103
880599210,5cyclictest0-21swapper/310:23:103
880099212,5cyclictest20447-21munin-run07:35:012
8800992114,4cyclictest20721-21dump-pmu-power12:30:012
879599218,3cyclictest0-21swapper/112:13:421
879599216,4cyclictest0-21swapper/112:19:151
879599214,7cyclictest13609-21latency_hist11:00:021
879599211,9cyclictest21-21rcuc/109:25:171
879599211,6cyclictest22803-21cat10:05:181
8795992116,3cyclictest3145-21awk11:50:011
879599211,3cyclictest17326-21taskset12:20:151
879599211,17cyclictest29853-21diskmemload11:59:471
879599211,15cyclictest0-21swapper/110:21:571
879599211,15cyclictest0-21swapper/110:21:571
879599211,14cyclictest0-21swapper/110:49:371
879599211,14cyclictest0-21swapper/109:56:381
879599211,12cyclictest0-21swapper/110:52:251
879599211,11cyclictest28664-21/usr/sbin/munin07:50:241
879599211,10cyclictest0-21swapper/112:07:191
878999212,7cyclictest6864-40dnf09:30:160
878999211,8cyclictest14688-21kworker/0:008:49:450
878999211,12cyclictest20827-21kworker/0:108:51:300
878999211,11cyclictest9338-21/usr/sbin/munin10:50:130
301812210,1sleep10-21swapper/107:55:161
880599204,3cyclictest0-21swapper/311:19:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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