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2026-04-23 - 16:59

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 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
353896521120,3sleep13056-21PK-Backend07:25:121
360170021090,5sleep13601696-21munin-run10:25:011
355203921020,3sleep10-21swapper/108:00:201
139099920,73rtkit-daemon0-21swapper/007:05:050
353252427340,26sleep30-21swapper/307:08:153
353159427144,19sleep20-21swapper/207:05:162
353169926745,14sleep10-21swapper/107:05:181
35508912390,4sleep03550875-21munin-run08:00:000
35930822350,2sleep30-21swapper/310:00:003
35930822350,2sleep30-21swapper/310:00:003
36117212280,4chrt0-21swapper/110:50:191
35579452270,7sleep0131ksoftirqd/008:20:010
3532809992714,5cyclictest26-21ksoftirqd/110:00:301
139099250,3rtkit-daemon1389-21rtkit-daemon07:36:560
3532817992410,4cyclictest34-21ksoftirqd/209:21:422
353281799238,13cyclictest3545399-21cron07:45:012
353281799237,4cyclictest34-21ksoftirqd/208:20:552
3532817992321,1cyclictest0-21swapper/210:04:082
3532817992321,1cyclictest0-21swapper/208:43:042
3532817992312,3cyclictest141rcu_preempt08:35:032
3532809992320,2cyclictest3056-21PK-Backend09:58:551
3532809992320,2cyclictest3056-21PK-Backend09:58:551
3532809992312,3cyclictest26-21ksoftirqd/110:25:481
3532805992320,2cyclictest0-21swapper/007:27:530
3532805992317,4cyclictest3637383-21munin-plugin-st12:05:000
3532805992310,11cyclictest3622724-21cron11:25:000
36036902220,4sleep00-21swapper/010:30:010
3532822992214,6cyclictest3565631-21df_inode08:40:123
353281799228,4cyclictest34-21ksoftirqd/208:26:542
353281799228,4cyclictest34-21ksoftirqd/208:05:442
353281799226,4cyclictest34-21ksoftirqd/212:39:362
353281799226,4cyclictest34-21ksoftirqd/211:41:022
353281799226,4cyclictest34-21ksoftirqd/210:23:182
353281799226,4cyclictest34-21ksoftirqd/209:54:472
353281799225,5cyclictest34-21ksoftirqd/208:45:112
3532817992220,1cyclictest0-21swapper/211:33:172
3532817992220,1cyclictest0-21swapper/210:57:482
3532817992220,1cyclictest0-21swapper/209:25:082
3532817992220,1cyclictest0-21swapper/209:16:562
3532817992220,1cyclictest0-21swapper/208:58:322
3532817992220,1cyclictest0-21swapper/208:58:322
3532817992220,1cyclictest0-21swapper/208:04:512
3532817992220,1cyclictest0-21swapper/207:23:002
3532817992212,8cyclictest3645292-21/usr/sbin/munin12:25:182
3532817992211,4cyclictest34-21ksoftirqd/211:37:282
353281799220,21cyclictest0-21swapper/211:49:342
353280999227,3cyclictest26-21ksoftirqd/108:41:381
3532805992220,1cyclictest0-21swapper/011:27:500
3532805992220,1cyclictest0-21swapper/009:36:570
3532805992220,1cyclictest0-21swapper/009:31:010
3532805992220,1cyclictest0-21swapper/008:45:470
3532805992220,1cyclictest0-21swapper/007:12:450
353280599220,20cyclictest3056-21PK-Backend07:52:000
139099220,4rtkit-daemon1389-21rtkit-daemon11:46:351
139099220,4rtkit-daemon1389-21rtkit-daemon08:36:241
35839612210,5chrt42-21ksoftirqd/309:30:243
3532822992119,1cyclictest3056-21PK-Backend08:28:283
3532822992119,1cyclictest0-21swapper/309:35:393
3532822992118,2cyclictest0-21swapper/307:55:163
3532822992113,6cyclictest3627567-21memory11:35:173
353282299211,18cyclictest3548044-21diskstats07:50:133
353281799217,3cyclictest34-21ksoftirqd/207:56:512
353281799216,4cyclictest34-21ksoftirqd/211:58:532
353281799216,4cyclictest34-21ksoftirqd/211:58:532
353281799214,4cyclictest34-21ksoftirqd/211:50:442
3532817992119,1cyclictest0-21swapper/212:13:062
3532817992119,1cyclictest0-21swapper/212:05:362
3532817992119,1cyclictest0-21swapper/212:04:342
3532817992119,1cyclictest0-21swapper/211:27:222
3532817992119,1cyclictest0-21swapper/209:05:422
3532817992119,1cyclictest0-21swapper/208:50:332
3532817992119,1cyclictest0-21swapper/208:12:082
3532817992119,1cyclictest0-21swapper/207:38:352
3532817992119,1cyclictest0-21swapper/207:33:422
3532817992119,1cyclictest0-21swapper/207:16:382
3532817992119,1cyclictest0-21swapper/207:12:532
3532817992118,2cyclictest0-21swapper/212:23:122
3532817992117,3cyclictest34-21ksoftirqd/211:15:012
3532817992117,3cyclictest34-21ksoftirqd/209:45:002
353281799210,20cyclictest0-21swapper/211:15:332
353280999216,4cyclictest26-21ksoftirqd/112:12:341
353280999216,4cyclictest26-21ksoftirqd/108:19:291
353280999213,2cyclictest141rcu_preempt10:47:471
3532809992119,1cyclictest3056-21PK-Backend11:09:591
3532809992119,1cyclictest0-21swapper/109:31:311
3532809992118,2cyclictest3056-21PK-Backend11:13:371
3532809992114,5cyclictest3561254-21cron08:29:591
3532809992113,6cyclictest3562996-21apt-get08:35:001
353280999211,18cyclictest3544082-21tr07:40:131
353280999210,19cyclictest3056-21PK-Backend10:07:121
3532805992119,1cyclictest3056-21PK-Backend12:08:110
3532805992119,1cyclictest0-21swapper/012:39:070
3532805992119,1cyclictest0-21swapper/012:23:460
3532805992119,1cyclictest0-21swapper/012:15:410
3532805992119,1cyclictest0-21swapper/012:14:400
3532805992119,1cyclictest0-21swapper/011:46:550
3532805992119,1cyclictest0-21swapper/011:39:260
3532805992119,1cyclictest0-21swapper/010:12:400
3532805992119,1cyclictest0-21swapper/009:26:080
3532805992119,1cyclictest0-21swapper/008:12:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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