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2026-07-26 - 20:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Sun Jul 26, 2026 00:45:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1842099996463,1cyclictest1825522-1kworker/u33:2+i915_flip20:25:0510
184137325149,1sleep120-21swapper/1219:06:284
184129925048,1sleep40-21swapper/419:05:3110
184138624947,1sleep50-21swapper/519:06:3611
1842097994644,2cyclictest1837538-21kworker/u32:1+events_unbound19:15:029
1842097994644,2cyclictest1837538-21kworker/u32:1+events_unbound19:15:019
418998450,43rtkit-daemon0-21swapper/619:09:3512
184137124240,1sleep100-21swapper/1019:06:262
184157224139,1sleep70-21swapper/719:09:0313
184140724139,1sleep80-21swapper/819:06:5614
184137224038,1sleep110-21swapper/1119:06:273
1842091993837,1cyclictest1912788-21kworker/u32:2+flush-259:021:00:221
184139023836,1sleep90-21swapper/919:06:4115
184209799371,31cyclictest211rcu_preempt00:32:179
184152323735,1sleep150-21swapper/1519:08:227
184137523735,1sleep130-21swapper/1319:06:295
1842127993635,1cyclictest1967885-21kworker/u32:0+events_unbound21:45:144
184152823634,1sleep30-21swapper/319:08:269
184129523634,1sleep20-21swapper/219:05:298
1842097993535,0cyclictest0-21swapper/322:28:079
184137623533,1sleep140-21swapper/1419:06:306
184213399349,25cyclictest618598-21thunderbird19:24:056
184213399349,25cyclictest618598-21thunderbird19:24:046
184213399349,25cyclictest0-21swapper/1421:13:536
1842127993434,0cyclictest0-21swapper/1221:53:094
1842118993433,1cyclictest2115831-21kworker/u32:3+events_unbound23:40:192
184213399338,25cyclictest0-21swapper/1420:29:596
1842099993330,3cyclictest0-21swapper/422:49:2410
1842097993333,0cyclictest0-21swapper/322:16:359
1842097993333,0cyclictest0-21swapper/322:16:359
1842097993333,0cyclictest0-21swapper/321:12:589
183849823331,1sleep10-21swapper/119:05:121
183817323331,1sleep00-21swapper/019:05:110
184213399328,11cyclictest0-21swapper/1422:30:466
184213399328,11cyclictest0-21swapper/1421:57:506
184213399327,25cyclictest0-21swapper/1423:58:396
184213199320,29cyclictest0-21swapper/1320:15:165
184212799323,29cyclictest0-21swapper/1222:32:094
1842127993232,0cyclictest0-21swapper/1223:51:204
1842127993232,0cyclictest0-21swapper/1200:39:064
184212799320,2cyclictest2031636-21kworker/12:2+mm_percpu_wq22:24:174
184212799320,2cyclictest2031636-21kworker/12:2+mm_percpu_wq22:24:174
1842097993232,0cyclictest0-21swapper/323:43:219
1842097993232,0cyclictest0-21swapper/323:18:339
1842097993232,0cyclictest0-21swapper/323:07:559
1842097993232,0cyclictest0-21swapper/322:42:009
1842097993232,0cyclictest0-21swapper/321:01:529
1842097993232,0cyclictest0-21swapper/320:09:219
1842097993232,0cyclictest0-21swapper/300:37:369
1842097993232,0cyclictest0-21swapper/300:25:549
1842097993231,1cyclictest2115831-21kworker/u32:3+events_unbound23:45:169
184209799321,30cyclictest511ktimers/300:08:009
184209399320,29cyclictest0-21swapper/222:17:378
184209399320,29cyclictest0-21swapper/222:17:368
184209399320,29cyclictest0-21swapper/221:36:098
1842131993130,1cyclictest1774-21snmpd21:37:535
1842127993131,0cyclictest0-21swapper/1220:10:494
1842127993129,2cyclictest2098328-21kworker/u32:1+events_unbound23:17:064
1842118993130,1cyclictest2030330-21kworker/10:0+events23:54:032
1842118993130,1cyclictest2030330-21kworker/10:0+events22:34:032
1842118993130,1cyclictest2030330-21kworker/10:0+events22:25:382
1842118993130,1cyclictest2030330-21kworker/10:0+events00:01:052
1842118993130,1cyclictest1969305-21kworker/10:2+events22:17:412
1842118993130,1cyclictest1969305-21kworker/10:2+events22:17:402
1842118993130,1cyclictest1855409-21kworker/10:1+events21:20:152
1842118993130,1cyclictest1855409-21kworker/10:1+events21:11:132
1842118993130,1cyclictest1855409-21kworker/10:1+events20:08:042
1842118993130,1cyclictest1855409-21kworker/10:1+events19:43:252
1842118993129,1cyclictest2030330-21kworker/10:0+events23:30:572
1842118993129,1cyclictest2030330-21kworker/10:0+events00:20:182
184211899310,30cyclictest618700-21WRRende~ckend#123:55:582
184211899310,30cyclictest0-21swapper/1019:35:152
184211499310,30cyclictest0-21swapper/923:20:4515
1842112993130,1cyclictest1774-21snmpd23:07:0914
1842112993130,1cyclictest0-21swapper/823:01:5914
1842107993131,0cyclictest1825522-1kworker/u33:2+i915_flip19:45:1812
1842107993130,1cyclictest1774-21snmpd19:17:4712
1842107993130,1cyclictest1774-21snmpd19:17:4612
184210799310,30cyclictest0-21swapper/623:10:1512
184210299310,30cyclictest0-21swapper/522:45:1611
184210299310,30cyclictest0-21swapper/520:51:1611
184209999310,31cyclictest618598-21thunderbird23:13:5110
184209999310,30cyclictest0-21swapper/419:33:1310
1842097993131,0cyclictest0-21swapper/323:24:579
1842097993131,0cyclictest0-21swapper/321:38:339
1842097993131,0cyclictest0-21swapper/321:30:149
1842097993130,1cyclictest2133435-21kworker/u32:2+events_unbound23:55:139
1842097993130,1cyclictest2001027-21kworker/u32:2+events_unbound22:00:179
184208899310,30cyclictest0-21swapper/020:40:070
1842137993029,1cyclictest2004188-21ethtool21:55:157
1842133993029,1cyclictest1774-21snmpd21:36:126
1842133993027,2cyclictest618598-21thunderbird19:10:006
184213399300,30cyclictest0-21swapper/1422:36:146
184213399300,27cyclictest0-21swapper/1420:20:166
1842131993029,1cyclictest1774-21snmpd20:51:445
184213199300,30cyclictest0-21swapper/1321:33:005
1842127993030,0cyclictest0-21swapper/1221:42:184
184212799300,30cyclictest2065451-21kworker/12:2-events22:47:224
184212799300,30cyclictest0-21swapper/1221:01:054
1842123993029,1cyclictest1774-21snmpd23:39:373
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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