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2026-08-26 - 23:05

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 Wed Aug 26, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29987202970,2sleep00-21swapper/012:09:090
139099880,53rtkit-daemon0-21swapper/007:08:450
139099880,53rtkit-daemon0-21swapper/007:08:450
29505742860,2sleep20-21swapper/209:50:172
289279026747,14sleep20-21swapper/207:08:572
289279026747,14sleep20-21swapper/207:08:572
289268526544,14sleep30-21swapper/307:07:383
289268526544,14sleep30-21swapper/307:07:373
289265326143,13sleep10-21swapper/107:07:111
289265326143,13sleep10-21swapper/107:07:111
29380182530,4sleep13056-21PK-Backend09:15:141
29714932510,4sleep10-21swapper/110:50:181
28976202400,2sleep20-21swapper/207:20:152
139099390,3rtkit-daemon3056-21PK-Backend11:52:491
139099380,3rtkit-daemon3056-21PK-Backend08:03:341
289303699287,10cyclictest2951167-21taskset09:51:083
289303699270,13cyclictest0-21swapper/312:00:093
289303699270,12cyclictest2928484-21cut08:50:013
289303699266,8cyclictest2954664-21taskset10:01:353
289303699262,14cyclictest2926814-21date08:45:003
289303699260,15cyclictest2977750-21apt11:10:113
2893036992516,7cyclictest2949755-21/usr/sbin/munin09:50:003
2893036992510,13cyclictest2940112-21ntpq09:20:193
2893036992510,12cyclictest883-21dbus-daemon08:05:013
289303699250,14cyclictest0-21swapper/312:30:333
2893025992519,4cyclictest2902091-21cron07:35:000
139099250,17rtkit-daemon3056-21PK-Backend07:40:001
139099250,16rtkit-daemon3056-21PK-Backend08:25:221
289303699248,8cyclictest0-21swapper/307:57:253
2893036992414,7cyclictest436-20systemd-journal07:55:003
289303699241,14cyclictest2941956-21python309:25:213
289303699240,8cyclictest0-21swapper/311:50:183
289303699240,15cyclictest2974286-21apt11:00:143
289303699240,15cyclictest2893747-21latency07:10:163
289303699240,14cyclictest0-21swapper/310:24:533
2893033992413,3cyclictest34-21ksoftirqd/210:08:522
289303699232,16cyclictest2964745-21python310:30:223
2893036992319,2cyclictest2955218-21apt10:05:123
289303699230,9cyclictest2995176-21taskset11:58:123
289303699230,9cyclictest0-21swapper/307:25:193
289303699230,14cyclictest0-21swapper/310:13:073
289303699230,13cyclictest0-21swapper/312:07:543
289303699230,13cyclictest0-21swapper/311:23:393
289303699230,13cyclictest0-21swapper/310:40:533
289303699230,13cyclictest0-21swapper/307:17:543
289303699230,12cyclictest2919725-21taskset08:24:403
289303699230,10cyclictest2904059-21cat07:40:013
2893033992319,3cyclictest331rcuc/207:52:182
2893033992319,3cyclictest331rcuc/207:35:542
2893033992315,6cyclictest2975148-21python311:00:222
289303399230,21cyclictest2985057-21diskstats11:30:122
289302799230,21cyclictest3056-21PK-Backend12:00:561
2893025992321,1cyclictest0-21swapper/009:20:180
139099230,16rtkit-daemon3056-21PK-Backend08:53:171
139099230,15rtkit-daemon3056-21PK-Backend11:29:001
139099230,15rtkit-daemon3056-21PK-Backend09:11:261
139099230,14rtkit-daemon0-21swapper/008:45:130
28947912220,3sleep13056-21PK-Backend07:15:011
289303699222,10cyclictest0-21swapper/311:42:323
2893036992220,1cyclictest0-21swapper/309:02:253
2893036992220,1cyclictest0-21swapper/308:35:013
2893036992220,1cyclictest0-21swapper/308:18:253
2893036992219,2cyclictest0-21swapper/308:10:483
289303699221,6cyclictest2923244-21perf08:34:593
289303699221,6cyclictest2923244-21perf08:34:593
289303699220,9cyclictest3004119-21taskset12:23:223
289303699220,8cyclictest2973854-21runrttasks10:58:113
289303699220,8cyclictest2962730-21memory10:25:183
289303699220,8cyclictest2962730-21memory10:25:183
289303699220,14cyclictest0-21swapper/312:37:063
289303699220,14cyclictest0-21swapper/311:06:273
289303699220,13cyclictest0-21swapper/311:34:063
289303699220,13cyclictest0-21swapper/310:52:083
289303699220,13cyclictest0-21swapper/310:46:463
289303699220,13cyclictest0-21swapper/310:18:073
289303699220,13cyclictest0-21swapper/309:18:493
289303699220,13cyclictest0-21swapper/309:10:073
289303699220,13cyclictest0-21swapper/308:06:583
289303699220,13cyclictest0-21swapper/307:40:153
289303699220,12cyclictest2945835-21taskset09:37:493
289303699220,12cyclictest0-21swapper/312:27:313
289303699220,12cyclictest0-21swapper/312:14:123
289303699220,12cyclictest0-21swapper/309:57:343
289303699220,11cyclictest2921454-21taskset08:29:373
289303699220,10cyclictest0-21swapper/309:40:513
2893033992218,3cyclictest331rcuc/211:55:262
289303399220,21cyclictest0-21swapper/211:25:122
289303399220,20cyclictest2966083-21cat10:35:182
2893027992220,1cyclictest3056-21PK-Backend12:25:301
2893027992220,1cyclictest3056-21PK-Backend10:25:121
2893027992220,1cyclictest3056-21PK-Backend10:25:111
2893027992220,1cyclictest3056-21PK-Backend08:37:101
2893027992219,2cyclictest3056-21PK-Backend11:41:221
289302799220,20cyclictest3056-21PK-Backend11:14:591
2893025992220,1cyclictest0-21swapper/008:57:200
2893025992214,6cyclictest2941674-21memory09:25:170
2893025992213,7cyclictest2921109-21users08:25:210
139099220,3rtkit-daemon0-21swapper/012:22:330
139099220,15rtkit-daemon3056-21PK-Backend09:22:161
139099220,14rtkit-daemon0-21swapper/009:50:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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