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2026-08-03 - 00:35

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 Aug 02, 2026 00:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40991042365359,4sleep110-21swapper/1119:07:243
40989292363356,5sleep50-21swapper/519:05:2611
40990472361354,4sleep60-21swapper/619:06:4712
40989892356348,5sleep140-21swapper/1419:06:076
40989402354347,4sleep150-21swapper/1519:05:367
40991612349342,4sleep40-21swapper/419:08:0510
40991482349340,6sleep120-21swapper/1219:07:574
40991602345338,4sleep30-21swapper/319:08:049
40991022304297,5sleep100-21swapper/1019:07:232
40991452282274,5sleep90-21swapper/919:07:5415
40991572281272,6sleep20-21swapper/219:08:038
40977442112109,2sleep130-21swapper/1319:05:185
409919529793,3sleep10-21swapper/119:08:341
409926828785,1sleep80-21swapper/819:09:2914
409895727970,6sleep70-21swapper/719:05:4413
4099748994443,1cyclictest4184177-21kworker/u32:5+events_unbound21:40:140
409979799435,12cyclictest0-21swapper/1422:44:286
4099756994036,2cyclictest0-21swapper/223:20:258
4099752994039,1cyclictest121368-21kworker/u32:1+events_unbound23:10:191
409979799380,25cyclictest618700-21WRRende~ckend#123:39:236
4099748993837,1cyclictest4080936-21kworker/u32:1+events_unbound19:15:000
4099762993735,1cyclictest4117305-21kworker/4:2-events19:59:3710
4099762993735,1cyclictest4117305-21kworker/4:2-events19:59:3610
409899223731,5sleep00-21swapper/019:06:090
409979799360,23cyclictest0-21swapper/1419:15:476
4099762993636,0cyclictest0-21swapper/400:38:4110
4099762993635,1cyclictest88819-21kworker/4:0-events22:28:2410
4099764993433,1cyclictest227468-21kworker/u32:4+flush-259:000:05:2211
4099762993433,1cyclictest4184177-21kworker/u32:5+events_unbound21:15:2710
4099752993433,1cyclictest13889-21kworker/u32:2+events_unbound21:55:191
4099797993320,13cyclictest618666-21Renderer22:33:296
4099774993332,1cyclictest111028-21kworker/u32:0+events_unbound22:35:2714
4099774993331,1cyclictest0-21swapper/800:24:0314
4099762993333,0cyclictest0-21swapper/422:31:1810
409976299330,2cyclictest211rcu_preempt22:22:0310
4099752993333,0cyclictest0-21swapper/122:37:141
4099752993333,0cyclictest0-21swapper/122:32:181
4099797993229,2cyclictest1774-21snmpd21:16:146
4099774993232,0cyclictest0-21swapper/821:08:0414
4099774993231,1cyclictest4146396-21kworker/u32:0+events_unbound20:40:1814
4099774993231,1cyclictest0-21swapper/822:13:3614
4099762993232,0cyclictest0-21swapper/422:19:1210
409976299321,1cyclictest4117305-21kworker/4:2+mm_percpu_wq21:13:5210
4099752993232,0cyclictest0-21swapper/123:39:051
4099752993232,0cyclictest0-21swapper/121:15:061
4099799993130,1cyclictest272898-21mii-tool00:35:157
4099799993130,1cyclictest1774-21snmpd22:36:197
409979799317,11cyclictest0-21swapper/1421:05:376
4099781993130,1cyclictest205294-21kworker/10:1+events00:22:382
4099781993129,1cyclictest4043169-21kworker/10:0+events19:45:162
409977799310,30cyclictest0-21swapper/923:27:0415
4099774993130,1cyclictest185054-21kworker/u32:2+events_unbound00:25:2114
409977499310,30cyclictest0-21swapper/820:45:1614
4099772993130,1cyclictest1774-21snmpd22:15:3413
4099772993130,1cyclictest1774-21snmpd20:42:2213
409977299310,30cyclictest0-21swapper/720:51:4413
4099767993129,2cyclictest0-21swapper/619:11:4712
409976799310,30cyclictest0-21swapper/620:20:1612
4099762993131,0cyclictest0-21swapper/420:20:5610
4099762993128,2cyclictest0-21swapper/419:20:1510
4099752993131,0cyclictest0-21swapper/122:44:161
4099752993130,1cyclictest1774-21snmpd23:42:511
409974899310,31cyclictest0-21swapper/022:10:540
4099799993029,1cyclictest1774-21snmpd23:43:517
4099799993029,1cyclictest0-21swapper/1520:56:207
409979999300,30cyclictest618698-21WRScene~ilder#121:38:277
409979799306,13cyclictest0-21swapper/1419:26:466
409979799306,11cyclictest0-21swapper/1419:37:456
4099797993028,1cyclictest253479-21ethtool00:20:156
409979799300,1cyclictest0-21swapper/1419:56:216
409979799300,1cyclictest0-21swapper/1419:56:216
409979399300,30cyclictest0-21swapper/1322:35:175
409979399300,30cyclictest0-21swapper/1322:13:435
409979199300,30cyclictest0-21swapper/1221:46:364
4099787993029,1cyclictest266478-21mii-tool00:30:143
4099781993029,1cyclictest57446-21kworker/10:0+events22:17:242
4099781993029,1cyclictest57446-21kworker/10:0+events22:06:542
4099781993029,1cyclictest4043169-21kworker/10:0+events19:16:082
4099781993029,1cyclictest26668-21kworker/10:0+events21:34:462
4099781993029,1cyclictest205294-21kworker/10:1+events00:01:572
4099781993029,1cyclictest1774-21snmpd19:30:532
4099781993029,1cyclictest109783-21kworker/10:1+events22:55:362
4099781993029,1cyclictest109783-21kworker/10:1+events22:55:362
4099781993029,1cyclictest109783-21kworker/10:1+events22:40:442
4099781993029,1cyclictest10414-21kworker/10:2+events21:16:542
4099777993029,1cyclictest1774-21snmpd22:31:2215
4099777993029,1cyclictest0-21swapper/921:17:5915
409977799300,30cyclictest0-21swapper/900:09:1115
409977799300,1cyclictest618598-21thunderbird19:43:4515
4099774993030,0cyclictest0-21swapper/800:01:5314
4099774993029,1cyclictest4121321-21kworker/u32:3+events_unbound19:40:2214
4099774993029,1cyclictest4098968-21kworker/u32:4+events_unbound19:15:1414
4099774993029,0cyclictest0-21swapper/821:52:5614
409977499300,30cyclictest0-21swapper/823:41:3614
409977299300,30cyclictest0-21swapper/722:58:0013
409977299300,30cyclictest0-21swapper/722:58:0013
409977299300,1cyclictest0-21swapper/720:34:3513
4099767993029,1cyclictest1774-21snmpd22:16:4012
4099767993029,1cyclictest1774-21snmpd22:10:2212
4099767993029,1cyclictest1774-21snmpd21:04:3912
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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