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2026-04-23 - 10:28

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 Apr 23, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
325829121360,3sleep2331rcuc/219:39:562
324588927945,23sleep20-21swapper/219:05:112
139099790,65rtkit-daemon0-21swapper/119:07:581
324585627343,20sleep30-21swapper/319:05:073
324628926242,13sleep00-21swapper/019:05:160
32998662610,11sleep234-21ksoftirqd/221:35:202
32550232540,2sleep20-21swapper/219:30:012
33022942500,2sleep10-21swapper/121:45:011
32755152440,4sleep10-21swapper/120:25:211
139099340,4rtkit-daemon1389-21rtkit-daemon19:33:122
324750199287,2cyclictest141rcu_preempt21:00:003
324749699271,24cyclictest3357253-21idleruntime-cro00:20:002
324749199270,7cyclictest3280563-21cut20:40:170
32704412250,5sleep23270442-21dump-pmu-power20:15:002
139099250,4rtkit-daemon1389-21rtkit-daemon23:54:353
139099250,4rtkit-daemon1389-21rtkit-daemon22:45:193
3247501992419,4cyclictest42-21ksoftirqd/323:50:003
3247491992412,10cyclictest3286561-21cron20:59:590
139099240,3rtkit-daemon1389-21rtkit-daemon23:16:442
3247496992318,4cyclictest3283645-21cat20:50:122
3247496992314,7cyclictest3252650-21ls19:20:202
3247491992321,1cyclictest0-21swapper/022:49:560
3247491992315,6cyclictest436-20systemd-journal20:30:000
139099230,3rtkit-daemon1389-21rtkit-daemon22:33:272
324750199227,3cyclictest3289601-21timerwakeupswit21:05:213
3247501992220,1cyclictest3056-21PK-Backend21:18:153
3247501992220,1cyclictest0-21swapper/323:36:383
3247501992219,2cyclictest3056-21PK-Backend23:40:433
3247501992215,5cyclictest3334408-21cron23:15:003
324750199220,20cyclictest3056-21PK-Backend21:56:403
3247496992220,1cyclictest0-21swapper/221:46:222
3247496992220,1cyclictest0-21swapper/220:25:242
3247496992220,1cyclictest0-21swapper/200:09:322
324749699220,21cyclictest0-21swapper/220:15:032
324749699220,20cyclictest0-21swapper/222:21:172
324749699220,20cyclictest0-21swapper/221:32:302
3247493992216,4cyclictest33523102sleep100:05:121
3247493992214,6cyclictest3297982-21ntp_states21:30:191
3247491992220,1cyclictest0-21swapper/023:54:110
3247491992220,1cyclictest0-21swapper/023:32:410
3247491992220,1cyclictest0-21swapper/023:28:350
3247491992220,1cyclictest0-21swapper/022:51:580
3247491992220,1cyclictest0-21swapper/021:28:240
3247491992220,1cyclictest0-21swapper/021:22:420
3247491992220,1cyclictest0-21swapper/020:02:120
3247491992215,5cyclictest436-20systemd-journal22:40:000
139099220,4rtkit-daemon1389-21rtkit-daemon00:16:163
139099220,3rtkit-daemon1389-21rtkit-daemon21:22:253
139099220,3rtkit-daemon1389-21rtkit-daemon21:20:462
33632012210,3sleep20-21swapper/200:35:162
33311012210,4sleep13056-21PK-Backend23:05:011
3247501992119,1cyclictest3056-21PK-Backend20:39:273
3247501992119,1cyclictest3056-21PK-Backend00:28:563
3247501992119,1cyclictest3056-21PK-Backend00:01:393
3247501992119,1cyclictest3056-21PK-Backend00:01:393
3247501992119,1cyclictest0-21swapper/323:30:293
3247501992119,1cyclictest0-21swapper/320:53:283
3247501992119,1cyclictest0-21swapper/300:14:093
3247501992118,2cyclictest3056-21PK-Backend22:39:053
3247501992118,2cyclictest3056-21PK-Backend19:24:313
3247501992117,2cyclictest3336417-21idleruntime-cro23:20:003
3247501992116,4cyclictest42-21ksoftirqd/322:45:013
3247501992112,7cyclictest3353787-21cron00:10:003
324750199210,20cyclictest3056-21PK-Backend22:57:173
324750199210,20cyclictest3056-21PK-Backend22:08:163
324750199210,19cyclictest3056-21PK-Backend19:13:223
3247496992119,1cyclictest0-21swapper/223:54:322
3247496992119,1cyclictest0-21swapper/223:33:362
3247496992119,1cyclictest0-21swapper/223:03:292
3247496992119,1cyclictest0-21swapper/222:43:482
3247496992119,1cyclictest0-21swapper/221:56:242
3247496992119,1cyclictest0-21swapper/221:44:192
3247496992119,1cyclictest0-21swapper/221:07:292
3247496992119,1cyclictest0-21swapper/220:56:542
3247496992119,1cyclictest0-21swapper/220:24:232
3247496992119,1cyclictest0-21swapper/200:30:552
3247496992119,1cyclictest0-21swapper/200:26:362
3247496992119,1cyclictest0-21swapper/200:21:162
3247496992119,1cyclictest0-21swapper/200:04:122
3247496992119,1cyclictest0-21swapper/200:04:122
324749399216,13cyclictest3357255-21sh00:20:001
3247493992119,1cyclictest0-21swapper/119:20:031
3247493992119,1cyclictest0-21swapper/100:25:161
3247493992118,2cyclictest0-21swapper/122:20:111
3247493992114,5cyclictest3310986-21date22:10:011
3247493992113,6cyclictest1-21systemd20:45:021
324749399210,19cyclictest3056-21PK-Backend23:38:591
324749399210,19cyclictest3056-21PK-Backend21:25:151
3247491992119,1cyclictest3056-21PK-Backend23:00:100
3247491992119,1cyclictest0-21swapper/022:11:090
3247491992119,1cyclictest0-21swapper/021:53:380
3247491992119,1cyclictest0-21swapper/021:39:590
3247491992119,1cyclictest0-21swapper/020:13:340
324749199210,20cyclictest0-21swapper/022:02:240
324749199210,20cyclictest0-21swapper/021:09:310
324749199210,20cyclictest0-21swapper/020:21:530
324749199210,20cyclictest0-21swapper/020:05:020
324749199210,20cyclictest0-21swapper/019:43:330
324749199210,20cyclictest0-21swapper/019:31:020
324749199210,20cyclictest0-21swapper/019:15:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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