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2026-05-17 - 18:00

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 Sun May 17, 2026 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33783222260,8sleep0922-21systemd-logind07:10:020
33718221210,9sleep30-21swapper/307:05:263
39624821070,3sleep10-21swapper/109:50:221
33769326838,23sleep20-21swapper/207:09:112
33758226545,14sleep10-21swapper/107:07:471
4111972510,2sleep00-21swapper/010:35:120
3422452480,4sleep03056-21PK-Backend07:20:110
3422452480,4sleep03056-21PK-Backend07:20:110
3744472460,2sleep20-21swapper/208:50:162
3666392430,2sleep10-21swapper/108:30:101
3934462420,3sleep00-21swapper/009:45:040
337907992822,4cyclictest452793-21unin-run12:35:002
33790999260,4cyclictest0-21swapper/307:55:003
337907992620,5cyclictest34-21ksoftirqd/207:29:182
33790999253,5cyclictest345911-21diskstats07:30:133
33790999251,8cyclictest444473-21chrt12:10:153
33790999251,8cyclictest444473-21chrt12:10:143
337909992516,5cyclictest390606-21python309:35:213
139099250,4rtkit-daemon1389-21rtkit-daemon11:59:502
139099250,4rtkit-daemon1389-21rtkit-daemon11:44:282
33790999246,16cyclictest3704752sleep308:40:123
33790999243,6cyclictest345259-21cron07:30:003
337898992413,9cyclictest436-20systemd-journal07:45:000
337907992314,7cyclictest409467-21df_inode10:30:132
337898992321,1cyclictest0-21swapper/011:40:190
337898992315,6cyclictest408842-21/usr/sbin/munin10:30:010
33789899230,3cyclictest420247-21irqstats11:00:160
139099230,4rtkit-daemon1389-21rtkit-daemon09:51:172
3877462220,2sleep00-21swapper/009:30:000
337909992220,1cyclictest0-21swapper/308:13:263
337903992220,1cyclictest0-21swapper/111:36:561
337903992220,1cyclictest0-21swapper/111:33:521
337903992220,1cyclictest0-21swapper/109:09:051
337903992219,2cyclictest414966-21strings10:45:181
33790399220,3cyclictest0-21swapper/109:30:141
33790399220,21cyclictest0-21swapper/110:59:581
33790399220,20cyclictest3056-21PK-Backend12:15:211
337898992220,1cyclictest0-21swapper/012:18:240
337898992220,1cyclictest0-21swapper/012:13:310
337898992220,1cyclictest0-21swapper/012:13:310
337898992220,1cyclictest0-21swapper/010:48:270
337898992220,1cyclictest0-21swapper/007:36:030
337898992213,7cyclictest417467-21sshd10:54:540
4494292210,4chrt0-21swapper/212:25:022
4441882210,2sleep10-21swapper/112:10:131
4441882210,2sleep10-21swapper/112:10:121
3922152210,4sleep13056-21PK-Backend09:40:201
33790999214,6cyclictest42-21ksoftirqd/312:25:103
33790999213,6cyclictest42-21ksoftirqd/310:40:483
33790999213,3cyclictest42-21ksoftirqd/310:40:003
33790999212,7cyclictest42-21ksoftirqd/311:17:003
337909992119,1cyclictest3056-21PK-Backend12:09:303
337909992119,1cyclictest3056-21PK-Backend10:55:163
337909992119,1cyclictest3056-21PK-Backend10:49:213
337909992119,1cyclictest3056-21PK-Backend09:19:163
337909992119,1cyclictest3056-21PK-Backend08:38:003
337909992119,1cyclictest0-21swapper/312:32:213
337909992119,1cyclictest0-21swapper/308:01:303
337909992119,1cyclictest0-21swapper/307:48:313
337909992119,1cyclictest0-21swapper/307:11:143
33790999211,6cyclictest433655-21taskset11:40:063
33790999211,17cyclictest356002-21munin-run08:00:003
33790999210,7cyclictest389264-21taskset09:32:353
33790999210,20cyclictest3056-21PK-Backend10:03:113
33790999210,20cyclictest3056-21PK-Backend09:06:463
33790999210,19cyclictest385142-21python309:20:203
337907992119,1cyclictest0-21swapper/212:21:102
337907992119,1cyclictest0-21swapper/212:09:062
337907992119,1cyclictest0-21swapper/211:39:192
337907992119,1cyclictest0-21swapper/211:31:082
337907992119,1cyclictest0-21swapper/210:24:362
337907992119,1cyclictest0-21swapper/210:03:412
337907992119,1cyclictest0-21swapper/208:01:192
337907992117,3cyclictest453543-21latency12:35:152
33790799210,20cyclictest0-21swapper/210:42:132
33790799210,20cyclictest0-21swapper/210:16:112
33790799210,1cyclictest0-21swapper/207:50:112
337903992119,1cyclictest3056-21PK-Backend07:55:391
337903992119,1cyclictest3056-21PK-Backend07:43:071
337903992119,1cyclictest0-21swapper/112:07:381
337903992119,1cyclictest0-21swapper/109:57:391
337903992119,1cyclictest0-21swapper/108:36:001
337903992118,2cyclictest3056-21PK-Backend07:12:111
337903992113,6cyclictest436-20systemd-journal08:25:001
337903992113,6cyclictest436-20systemd-journal08:25:001
33790399210,20cyclictest3056-21PK-Backend12:00:561
33790399210,20cyclictest3056-21PK-Backend07:21:381
33790399210,20cyclictest3056-21PK-Backend07:21:381
33790399210,20cyclictest0-21swapper/110:50:111
33790399210,20cyclictest0-21swapper/110:17:541
33790399210,20cyclictest0-21swapper/108:57:371
33790399210,19cyclictest3056-21PK-Backend07:49:101
337898992119,1cyclictest0-21swapper/012:32:160
337898992119,1cyclictest0-21swapper/012:05:460
337898992119,1cyclictest0-21swapper/011:52:080
337898992119,1cyclictest0-21swapper/011:17:140
337898992119,1cyclictest0-21swapper/011:09:150
337898992119,1cyclictest0-21swapper/010:17:110
337898992119,1cyclictest0-21swapper/010:13:050
337898992119,1cyclictest0-21swapper/010:13:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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