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2026-05-03 - 18:49

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 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 Sun May 03, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
89351021430,6sleep20-21swapper/212:00:122
82893421260,1sleep20-21swapper/208:55:192
82669821260,4sleep13056-21PK-Backend08:50:131
83909321160,3sleep30-21swapper/309:25:033
85543221120,2sleep30-21swapper/310:10:153
79317121100,4sleep20-21swapper/207:15:032
79062027341,25sleep30-21swapper/307:06:173
139099720,59rtkit-daemon0-21swapper/207:07:432
79091126747,11sleep10-21swapper/107:10:011
79063726644,14sleep00-21swapper/007:06:310
8272452350,3sleep00-21swapper/008:50:190
79105199289,4cyclictest856660-21sed10:15:002
7977462260,3chrt0-21swapper/207:25:212
79105199257,4cyclictest0-21swapper/209:20:172
791051992417,1cyclictest0-21swapper/209:16:492
8688762230,8sleep234-21ksoftirqd/210:50:122
791051992318,3cyclictest819245-21cron08:30:002
791051992318,3cyclictest819245-21cron08:30:002
79105199231,7cyclictest853268-21apt10:05:122
79104999230,21cyclictest3056-21PK-Backend11:32:491
791044992321,1cyclictest0-21swapper/010:25:340
791044992321,1cyclictest0-21swapper/008:13:130
791054992220,1cyclictest3056-21PK-Backend10:52:053
791054992220,1cyclictest0-21swapper/309:53:183
791054992219,2cyclictest3056-21PK-Backend11:08:273
791054992219,2cyclictest3056-21PK-Backend08:36:393
791054992219,2cyclictest3056-21PK-Backend07:25:543
79105499221,18cyclictest843725-21python309:35:213
79105199229,11cyclictest807115-21cron07:55:002
791051992218,2cyclictest978-21snmpd07:12:242
791051992217,4cyclictest0-21swapper/211:57:302
791049992220,1cyclictest3056-21PK-Backend09:26:551
791049992220,1cyclictest0-21swapper/111:45:331
791049992220,1cyclictest0-21swapper/110:29:421
791049992220,1cyclictest0-21swapper/109:00:061
791049992220,1cyclictest0-21swapper/107:12:521
79104999220,20cyclictest3056-21PK-Backend10:10:231
79104999220,20cyclictest0-21swapper/112:15:471
79104999220,20cyclictest0-21swapper/112:15:471
791044992220,1cyclictest3056-21PK-Backend07:55:210
791044992220,1cyclictest0-21swapper/012:23:090
791044992220,1cyclictest0-21swapper/011:55:310
791044992220,1cyclictest0-21swapper/011:21:030
791044992220,1cyclictest0-21swapper/011:12:330
791044992220,1cyclictest0-21swapper/010:52:170
791044992220,1cyclictest0-21swapper/010:01:200
791044992220,1cyclictest0-21swapper/009:53:170
791044992220,1cyclictest0-21swapper/009:29:160
791044992220,1cyclictest0-21swapper/009:20:380
791044992220,1cyclictest0-21swapper/009:07:000
791044992220,1cyclictest0-21swapper/008:38:480
791044992220,1cyclictest0-21swapper/007:48:050
79104499220,20cyclictest3056-21PK-Backend12:30:130
139099220,15rtkit-daemon3056-21PK-Backend09:07:203
139099220,14rtkit-daemon0-21swapper/208:39:352
791054992119,1cyclictest3056-21PK-Backend11:02:593
791054992119,1cyclictest3056-21PK-Backend09:13:023
791054992119,1cyclictest3056-21PK-Backend07:11:083
791054992119,1cyclictest0-21swapper/312:33:583
791054992119,1cyclictest0-21swapper/311:53:013
791054992119,1cyclictest0-21swapper/311:44:443
791054992119,1cyclictest0-21swapper/311:34:363
791054992119,1cyclictest0-21swapper/311:25:163
791054992119,1cyclictest0-21swapper/310:37:173
791054992119,1cyclictest0-21swapper/310:31:503
791054992119,1cyclictest0-21swapper/309:22:293
791054992119,1cyclictest0-21swapper/308:32:263
791054992119,1cyclictest0-21swapper/308:16:043
791054992119,1cyclictest0-21swapper/307:37:033
791054992118,2cyclictest3056-21PK-Backend10:59:213
791054992113,6cyclictest883-21dbus-daemon10:05:003
791054992110,3cyclictest8924632processes11:55:213
79105499210,2cyclictest829666-21apt-get09:00:043
79105499210,20cyclictest0-21swapper/312:21:413
79105499210,20cyclictest0-21swapper/311:18:353
79105499210,20cyclictest0-21swapper/311:18:353
791051992119,1cyclictest0-21swapper/209:01:002
791051992113,7cyclictest883-21dbus-daemon09:39:362
791051992111,8cyclictest883-21dbus-daemon10:00:012
79104999218,3cyclictest8935112ls12:00:131
791049992119,1cyclictest3056-21PK-Backend12:22:381
791049992119,1cyclictest3056-21PK-Backend11:12:341
791049992119,1cyclictest3056-21PK-Backend10:21:371
791049992119,1cyclictest3056-21PK-Backend09:52:031
791049992119,1cyclictest3056-21PK-Backend08:27:071
791049992119,1cyclictest3056-21PK-Backend08:27:061
791049992119,1cyclictest3056-21PK-Backend08:06:261
791049992119,1cyclictest0-21swapper/112:37:171
791049992119,1cyclictest0-21swapper/111:07:071
791049992119,1cyclictest0-21swapper/107:23:191
791049992118,2cyclictest3056-21PK-Backend09:32:581
79104999210,20cyclictest3056-21PK-Backend11:51:001
79104999210,20cyclictest0-21swapper/107:15:481
79104999210,19cyclictest3056-21PK-Backend11:44:311
79104999210,19cyclictest3056-21PK-Backend11:20:521
79104999210,19cyclictest3056-21PK-Backend11:16:121
79104999210,19cyclictest3056-21PK-Backend11:16:121
79104999210,19cyclictest3056-21PK-Backend10:19:481
79104999210,19cyclictest3056-21PK-Backend09:20:061
791044992119,1cyclictest3056-21PK-Backend10:20:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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