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2026-04-10 - 03:01

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 Fri Apr 10, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
578722388368,13sleep20-21swapper/219:07:288
578112372317,12sleep110-21swapper/1119:06:493
577262367322,14sleep130-21swapper/1319:06:015
545312366357,6sleep80-21swapper/819:05:0914
579362360352,5sleep90-21swapper/919:08:2315
578382358338,13sleep150-21swapper/1519:07:097
578372354334,13sleep140-21swapper/1419:07:086
578222354346,5sleep50-21swapper/519:06:5911
579972353333,13sleep100-21swapper/1019:09:132
576892352331,14sleep70-21swapper/719:05:4013
579092350330,13sleep30-21swapper/319:08:019
578782350331,13sleep60-21swapper/619:07:3112
578412348328,14sleep10-21swapper/119:07:111
580262347328,13sleep120-21swapper/1219:09:314
579722346324,14sleep40-21swapper/419:08:5010
577672342321,14sleep00-21swapper/019:06:220
5857599489,0cyclictest0-21swapper/1419:40:396
5857599459,11cyclictest0-21swapper/1423:53:166
5857599448,11cyclictest0-21swapper/1422:47:226
58575994343,0cyclictest0-21swapper/1422:31:516
5857599426,11cyclictest0-21swapper/1419:29:406
58540993838,0cyclictest274343-21ssh22:36:298
3080282380,0sleep100-21swapper/1023:03:562
58540993734,3cyclictest0-21swapper/223:49:258
58575993636,0cyclictest0-21swapper/1423:41:496
58575993628,4cyclictest0-21swapper/1419:53:296
58559993612,23cyclictest0-21swapper/820:37:0614
5857599359,26cyclictest0-21swapper/1420:02:376
5857599359,0cyclictest0-21swapper/1422:14:256
58575993535,0cyclictest0-21swapper/1419:11:156
58575993510,0cyclictest0-21swapper/1421:19:306
58575993510,0cyclictest0-21swapper/1419:18:416
5857599350,9cyclictest0-21swapper/1421:08:316
58566993535,0cyclictest0-21swapper/1100:16:153
58540993533,2cyclictest214298-21sed21:50:158
58540993532,3cyclictest0-21swapper/222:08:138
58540993532,2cyclictest0-21swapper/200:30:138
5857599349,25cyclictest0-21swapper/1420:46:336
5857599349,0cyclictest0-21swapper/1420:35:346
58566993434,0cyclictest0-21swapper/1121:42:453
58566993434,0cyclictest0-21swapper/1121:42:453
58540993433,1cyclictest1769-21arpwatch22:54:458
58540993432,0cyclictest0-21swapper/222:55:078
58540993431,1cyclictest349568-21kworker/2:0-events00:03:018
58540993431,0cyclictest0-21swapper/221:48:238
58540993430,2cyclictest0-21swapper/221:15:198
5854099340,31cyclictest189097-21awk21:30:258
58580993328,5cyclictest1774-21snmpd00:24:297
5858099330,0cyclictest0-21swapper/1500:05:147
5857599339,24cyclictest0-21swapper/1420:57:326
5857599338,0cyclictest0-21swapper/1422:58:216
58575993333,0cyclictest0-21swapper/1422:44:536
58575993333,0cyclictest0-21swapper/1421:30:036
58575993333,0cyclictest0-21swapper/1420:42:076
58566993333,0cyclictest0-21swapper/1121:48:273
58566993332,1cyclictest380537-21kworker/u32:3-writeback00:39:333
58566993332,1cyclictest380537-21kworker/u32:3-writeback00:39:333
58566993332,1cyclictest280832-21kworker/u32:5+events_unbound22:45:223
58566993332,1cyclictest0-21swapper/1121:38:313
58566993332,1cyclictest0-21swapper/1121:38:313
5854999330,30cyclictest0-21swapper/519:24:1911
58540993333,0cyclictest0-21swapper/222:24:278
58540993332,1cyclictest0-21swapper/223:58:138
58540993332,1cyclictest0-21swapper/223:29:118
58540993331,2cyclictest1769-21arpwatch23:35:178
58540993331,2cyclictest0-21swapper/222:19:098
58540993331,2cyclictest0-21swapper/200:13:598
58540993330,2cyclictest0-21swapper/200:08:518
58549993228,4cyclictest1774-21snmpd20:55:2311
58543993232,0cyclictest0-21swapper/322:31:519
58543993232,0cyclictest0-21swapper/300:21:519
58540993232,0cyclictest0-21swapper/222:46:528
58540993231,1cyclictest0-21swapper/221:10:378
58540993231,0cyclictest0-21swapper/223:12:318
58540993230,2cyclictest0-21swapper/221:22:378
58540993230,0cyclictest0-21swapper/222:25:178
58540993229,3cyclictest0-21swapper/223:08:278
58540993228,3cyclictest429830-21sh00:36:498
58540993228,3cyclictest429830-21sh00:36:498
5854099320,30cyclictest237799-21kworker/2:2+mm_percpu_wq23:15:188
5854099320,30cyclictest0-21swapper/200:29:318
5854099320,29cyclictest0-21swapper/223:42:508
5854099320,29cyclictest0-21swapper/223:20:278
58580993129,2cyclictest0-21swapper/1523:26:107
58580993128,3cyclictest103518-21ethtool20:00:157
5857599316,0cyclictest0-21swapper/1420:13:366
58575993130,1cyclictest1774-21snmpd22:23:026
5857599312,29cyclictest1501ktimers/1421:48:296
5857599311,30cyclictest1501ktimers/1422:50:156
58573993130,1cyclictest1774-21snmpd21:05:415
5857399310,30cyclictest0-21swapper/1322:40:155
5857399310,30cyclictest0-21swapper/1321:45:555
5857399310,30cyclictest0-21swapper/1300:10:415
58566993130,1cyclictest183938-21kworker/11:1-events22:50:153
5856499310,30cyclictest0-21swapper/1019:45:162
5856199310,30cyclictest0-21swapper/921:35:1615
5856199310,30cyclictest0-21swapper/921:35:1615
5855999310,30cyclictest0-21swapper/823:40:4014
58554993130,1cyclictest1774-21snmpd21:26:0013
5855499310,30cyclictest0-21swapper/719:39:3013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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