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2026-08-08 - 03:03

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 Sat Aug 08, 2026 00:45:39)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21809502381375,4sleep150-21swapper/1519:05:217
21822252358349,6sleep100-21swapper/1019:09:482
21822292357349,5sleep140-21swapper/1419:09:536
21822162349339,6sleep30-21swapper/319:09:419
21819132349341,5sleep130-21swapper/1319:06:065
21819962348340,5sleep40-21swapper/419:07:0110
21821672344336,5sleep10-21swapper/119:09:071
21820952342333,6sleep90-21swapper/919:08:1115
21819062340333,4sleep70-21swapper/719:06:0013
21822062339329,7sleep120-21swapper/1219:09:344
21820782335326,6sleep110-21swapper/1119:07:563
21818722315307,5sleep20-21swapper/219:05:398
21820512307298,6sleep60-21swapper/619:07:3512
21818462301290,7sleep50-21swapper/519:05:2611
21821772298291,4sleep80-21swapper/819:09:1414
2178663210694,9sleep00-21swapper/019:05:050
2182680994543,2cyclictest2173434-21kworker/u32:1+events_unbound19:15:011
2182699994442,2cyclictest2332297-21kworker/u32:0+events_unbound22:55:1813
2182689994442,2cyclictest2267422-21kworker/u32:1+flush-259:020:55:1810
2182689994442,2cyclictest2267422-21kworker/u32:1+flush-259:020:55:1810
2182689994341,1cyclictest2135555-21kworker/u32:2+events_unbound19:10:1710
2182689994139,1cyclictest2216771-21kworker/u32:2+events_unbound20:10:1310
2182689994039,1cyclictest2332297-21kworker/u32:0+events_unbound22:30:2010
2182689993838,0cyclictest0-21swapper/421:10:1810
2182724993736,1cyclictest2211409-21kworker/u32:0+flush-259:020:40:166
2182701993737,0cyclictest0-21swapper/822:52:4114
2182724993522,0cyclictest0-21swapper/1423:43:156
2182719993433,1cyclictest2527744-21kworker/u32:2+flush-259:000:30:205
2182689993434,0cyclictest0-21swapper/421:41:2510
2182689993434,0cyclictest0-21swapper/420:48:1910
2182689993432,2cyclictest2527744-21kworker/u32:2+events_unbound00:30:1810
2182692993331,2cyclictest2173434-21kworker/u32:1+events_unbound19:40:1611
2182689993332,1cyclictest0-21swapper/423:08:2110
2182704993228,3cyclictest1774-21snmpd21:06:5115
2182704993228,3cyclictest1774-21snmpd20:25:5615
2182689993232,0cyclictest0-21swapper/400:28:5010
2182689993231,1cyclictest2390130-21kworker/u32:1+events_unbound22:45:1810
2182685993229,3cyclictest1774-21snmpd20:56:429
2182685993229,3cyclictest1774-21snmpd20:56:429
2182724993130,1cyclictest1774-21snmpd23:24:416
218272499310,30cyclictest0-21swapper/1420:28:386
218271999310,2cyclictest618680-21Compositor22:20:175
218271099310,30cyclictest618619-21glean.dispatche22:43:573
218271099310,30cyclictest0-21swapper/1123:53:483
218271099310,30cyclictest0-21swapper/1123:53:483
2182704993125,3cyclictest618598-21thunderbird00:10:1415
2182701993131,0cyclictest0-21swapper/800:28:2414
2182701993129,2cyclictest618598-21thunderbird00:33:0814
2182701993129,2cyclictest1774-21snmpd23:16:3514
2182699993130,1cyclictest1774-21snmpd21:28:5313
218269499310,30cyclictest0-21swapper/621:58:4412
2182692993130,1cyclictest1774-21snmpd23:28:2611
2182689993131,0cyclictest0-21swapper/423:03:0910
2182689993131,0cyclictest0-21swapper/422:56:5410
2182689993131,0cyclictest0-21swapper/421:37:2310
2182689993128,3cyclictest591rcuc/400:22:5210
218268999310,31cyclictest2431636-21kworker/4:0-mm_percpu_wq23:16:4710
2182685993128,3cyclictest1774-21snmpd22:02:279
2182685993128,3cyclictest1774-21snmpd20:17:039
218268399310,30cyclictest0-21swapper/223:44:058
218268399310,30cyclictest0-21swapper/222:13:208
218268399310,30cyclictest0-21swapper/219:57:088
218268399310,30cyclictest0-21swapper/219:37:078
2182680993130,1cyclictest2332297-21kworker/u32:0+flush-259:021:50:181
218267899310,30cyclictest0-21swapper/022:20:380
218267899310,30cyclictest0-21swapper/021:01:070
218267899310,30cyclictest0-21swapper/021:01:070
218272699300,30cyclictest0-21swapper/1520:40:237
218272699300,30cyclictest0-21swapper/1520:25:177
218272699300,30cyclictest0-21swapper/1519:17:057
2182724993029,1cyclictest1774-21snmpd21:18:496
2182724993029,1cyclictest0-21swapper/1422:01:176
218272499300,30cyclictest0-21swapper/1421:40:156
218272499300,30cyclictest0-21swapper/1400:30:446
218271999300,1cyclictest0-21swapper/1322:07:265
218271999300,1cyclictest0-21swapper/1300:09:245
2182715993029,1cyclictest2543948-21mii-tool00:30:164
2182715993028,2cyclictest2276192-21kworker/u32:3+flush-259:021:30:174
218271599300,30cyclictest0-21swapper/1223:41:274
218271599300,30cyclictest0-21swapper/1222:22:094
218271599300,30cyclictest0-21swapper/1221:18:264
218271599300,30cyclictest0-21swapper/1200:12:194
218271599300,1cyclictest0-21swapper/1219:35:404
2182710993029,1cyclictest1774-21snmpd23:22:043
218271099300,30cyclictest0-21swapper/1123:45:333
218271099300,1cyclictest0-21swapper/1100:11:283
2182706993030,0cyclictest2359463-21kworker/10:1+events22:23:272
2182706993029,1cyclictest2479715-21ethtool23:40:152
2182706993029,1cyclictest2406528-21kworker/10:0+events23:09:472
2182706993029,1cyclictest2135579-21kworker/10:0+events21:48:492
2182706993029,1cyclictest1774-21snmpd19:37:322
2182706993029,1cyclictest1774-21snmpd00:18:312
218270699300,1cyclictest0-21swapper/1023:49:052
218270699300,1cyclictest0-21swapper/1021:11:582
2182704993029,1cyclictest1774-21snmpd19:33:5815
218270499300,30cyclictest0-21swapper/921:54:5515
2182701993030,0cyclictest0-21swapper/822:41:0314
218270199300,30cyclictest618598-21thunderbird00:02:1614
218270199300,30cyclictest618598-21thunderbird00:02:1514
218270199300,30cyclictest0-21swapper/820:50:5214
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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