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2026-04-12 - 05:16

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 Apr 12, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3130892393387,4sleep20-21swapper/219:09:018
3128742385379,4sleep120-21swapper/1219:06:144
3130042370333,30sleep130-21swapper/1319:07:525
3128912364357,5sleep100-21swapper/1019:06:282
3131602359319,32sleep80-21swapper/819:09:5514
3130292356335,13sleep140-21swapper/1419:08:106
3128842355335,13sleep30-21swapper/319:06:219
3130412353331,14sleep70-21swapper/719:08:1913
3096912352339,8sleep110-21swapper/1119:05:093
3128212350330,13sleep50-21swapper/519:05:3511
3130662349329,13sleep150-21swapper/1519:08:437
3128422349330,12sleep60-21swapper/619:05:5312
3128472348328,13sleep90-21swapper/919:05:5515
3131142346327,13sleep10-21swapper/119:09:171
3131482345325,13sleep00-21swapper/019:09:480
3130122345327,12sleep40-21swapper/419:07:5910
4201522630,0sleep140-21swapper/1421:12:356
31363699459,11cyclictest0-21swapper/1400:23:516
31363699448,11cyclictest0-21swapper/1421:28:086
31363699448,11cyclictest0-21swapper/1420:22:146
31363699438,10cyclictest0-21swapper/1423:50:556
31363699437,36cyclictest0-21swapper/1419:38:186
31363699437,36cyclictest0-21swapper/1419:27:196
31363699437,11cyclictest0-21swapper/1423:28:566
313636994316,26cyclictest510648-21ssh22:23:036
31363699427,10cyclictest0-21swapper/1422:45:016
31363699425,36cyclictest0-21swapper/1421:39:086
31363699425,36cyclictest0-21swapper/1421:39:076
31363699415,11cyclictest0-21swapper/1423:17:586
31363699415,11cyclictest0-21swapper/1419:16:216
31363699357,4cyclictest0-21swapper/1422:12:046
313601993532,3cyclictest376898-21kworker/u32:3+events_unbound20:40:278
313601993433,0cyclictest0-21swapper/219:10:178
31363699338,25cyclictest0-21swapper/1423:39:556
31363699338,25cyclictest0-21swapper/1422:01:066
31363699337,25cyclictest0-21swapper/1420:44:136
313616993333,0cyclictest0-21swapper/722:45:5813
31360199330,32cyclictest516650-21sh22:27:188
31360199330,30cyclictest0-21swapper/222:09:418
31364399322,30cyclictest0-21swapper/1522:16:017
31363699327,25cyclictest0-21swapper/1420:55:116
31363699327,25cyclictest0-21swapper/1420:11:156
31363399320,29cyclictest0-21swapper/1319:55:165
313628993229,3cyclictest1774-21snmpd23:22:543
313616993232,0cyclictest0-21swapper/700:09:3913
31360999320,29cyclictest0-21swapper/523:05:1611
313601993229,3cyclictest556646-21ssh22:59:498
31360199320,29cyclictest0-21swapper/223:51:288
31360199320,29cyclictest0-21swapper/223:42:398
31360199320,29cyclictest0-21swapper/223:30:318
31360199320,29cyclictest0-21swapper/223:24:078
31360199320,29cyclictest0-21swapper/223:19:488
31360199320,29cyclictest0-21swapper/222:47:538
31360199320,29cyclictest0-21swapper/222:43:328
31360199320,29cyclictest0-21swapper/222:15:558
31360199320,29cyclictest0-21swapper/222:13:228
31360199320,29cyclictest0-21swapper/221:58:548
31360199320,29cyclictest0-21swapper/221:48:508
31360199320,29cyclictest0-21swapper/221:43:258
31360199320,29cyclictest0-21swapper/221:39:028
31360199320,29cyclictest0-21swapper/221:39:018
31360199320,29cyclictest0-21swapper/221:32:028
31360199320,29cyclictest0-21swapper/221:32:018
31360199320,29cyclictest0-21swapper/221:12:268
31360199320,29cyclictest0-21swapper/200:28:228
31360199320,29cyclictest0-21swapper/200:05:398
31364399311,1cyclictest0-21swapper/1500:04:197
31364399310,30cyclictest0-21swapper/1522:51:107
31363699316,25cyclictest0-21swapper/1420:00:166
31363399310,30cyclictest0-21swapper/1320:15:165
31362899310,30cyclictest490855-21ssh22:07:153
31362899310,30cyclictest0-21swapper/1123:25:153
313624993130,1cyclictest658377-21kworker/10:1+events00:18:532
31362299310,30cyclictest0-21swapper/922:48:5915
31362299310,30cyclictest0-21swapper/920:25:2715
31362299310,30cyclictest0-21swapper/900:33:2815
31362299310,30cyclictest0-21swapper/900:05:4215
313616993131,0cyclictest0-21swapper/721:38:2213
313616993131,0cyclictest0-21swapper/721:38:2113
313616993131,0cyclictest0-21swapper/700:30:5213
313616993131,0cyclictest0-21swapper/700:14:0313
313616993130,1cyclictest311656-21kworker/u32:1+flush-259:019:20:1513
313612993131,0cyclictest0-21swapper/623:06:0612
313612993131,0cyclictest0-21swapper/619:40:2312
313612993131,0cyclictest0-21swapper/600:30:5212
31360999310,30cyclictest0-21swapper/521:35:5311
31360999310,30cyclictest0-21swapper/521:35:5211
313607993130,1cyclictest1774-21snmpd23:43:3010
31360799310,30cyclictest0-21swapper/419:50:1510
31360399310,30cyclictest0-21swapper/321:30:169
31360399310,30cyclictest0-21swapper/321:30:159
31360399310,30cyclictest0-21swapper/319:26:459
313601993126,3cyclictest0-21swapper/222:21:118
313601993124,6cyclictest782-21systemd-journal21:20:208
31360199310,30cyclictest0-21swapper/221:50:078
31360199310,30cyclictest0-21swapper/221:15:168
31360199310,28cyclictest0-21swapper/223:26:168
31360199310,28cyclictest0-21swapper/222:52:418
31360199310,28cyclictest0-21swapper/220:55:208
31360199310,28cyclictest0-21swapper/219:55:178
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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