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2026-08-30 - 19:14

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 30, 2026 00:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39712202361344,10sleep70-21swapper/719:08:0813
39711662360322,13sleep60-21swapper/619:07:1712
39712322357337,13sleep00-21swapper/019:08:170
39712852356337,12sleep130-21swapper/1319:09:015
39712422355312,14sleep40-21swapper/419:08:2010
39711442354334,13sleep90-21swapper/919:07:0415
39711402354333,14sleep50-21swapper/519:07:0011
39711282354334,13sleep110-21swapper/1119:06:503
39710952353333,13sleep140-21swapper/1419:06:226
39713472352331,14sleep150-21swapper/1519:09:527
39713032350330,13sleep120-21swapper/1219:09:164
39713332349330,12sleep10-21swapper/119:09:381
39711452349329,13sleep100-21swapper/1019:07:052
39712992348327,13sleep80-21swapper/819:09:1314
39711572347327,13sleep30-21swapper/319:07:149
39710342347327,13sleep20-21swapper/219:05:388
397175699446,25cyclictest58108-21ssh23:28:136
397175699437,11cyclictest0-21swapper/1423:39:136
3971720993837,1cyclictest4154562-21kworker/u32:2+flush-259:022:40:158
397175699360,11cyclictest0-21swapper/1419:37:356
3971723993636,0cyclictest0-21swapper/321:23:059
3971720993623,3cyclictest13134-21ssh22:53:028
3971717993434,0cyclictest0-21swapper/121:36:551
397175699339,11cyclictest0-21swapper/1419:48:346
3971756993333,0cyclictest0-21swapper/1420:40:166
3971741993329,1cyclictest1774-21snmpd22:09:2015
3971741993329,1cyclictest1774-21snmpd00:00:2615
3971729993332,1cyclictest4026636-21kworker/u32:5+flush-259:021:40:1911
3971717993333,0cyclictest0-21swapper/121:23:061
397175699328,11cyclictest0-21swapper/1422:00:236
3971756993232,0cyclictest0-21swapper/1421:15:076
3971756993231,1cyclictest4109645-21kworker/u32:0+events_unbound22:25:166
397175699322,30cyclictest4075759-21kworker/14:2-events22:36:386
397172999320,29cyclictest0-21swapper/523:40:1411
3971723993231,1cyclictest501rcuc/321:10:199
3971723993231,1cyclictest4021535-21kworker/u32:3+flush-259:021:00:189
3971717993231,1cyclictest1769-21arpwatch21:10:201
3971759993130,1cyclictest0-21swapper/1523:13:487
3971759993129,1cyclictest4080348-21grep21:15:117
397175999310,30cyclictest0-21swapper/1523:46:077
397175999310,30cyclictest0-21swapper/1520:08:457
397175699317,11cyclictest0-21swapper/1419:59:346
3971756993130,1cyclictest1774-21snmpd21:22:246
3971756993130,0cyclictest0-21swapper/1422:30:216
3971756993129,1cyclictest132232-21kworker/14:2-events00:35:106
397174499310,30cyclictest0-21swapper/1023:24:452
397174499310,30cyclictest0-21swapper/1000:30:082
3971741993130,1cyclictest1774-21snmpd22:53:0915
3971741993130,1cyclictest1774-21snmpd00:17:2315
397173899310,30cyclictest0-21swapper/821:25:1414
397173899310,30cyclictest0-21swapper/820:40:1014
3971735993128,3cyclictest1774-21snmpd21:59:5213
3971735993128,3cyclictest1774-21snmpd21:59:5113
3971735993128,3cyclictest1774-21snmpd21:54:3413
3971735993128,3cyclictest1774-21snmpd21:54:3313
397173599310,30cyclictest0-21swapper/720:21:1813
397173599310,30cyclictest0-21swapper/720:08:1913
397173399310,30cyclictest0-21swapper/621:31:0212
397173399310,30cyclictest0-21swapper/619:20:1512
397172799310,30cyclictest0-21swapper/421:30:4110
3971723993130,0cyclictest0-21swapper/321:15:089
3971720993130,1cyclictest95028-21kworker/u32:1+events_unbound00:11:028
3971720993128,3cyclictest4109645-21kworker/u32:0+events_unbound22:25:458
397172099310,30cyclictest0-21swapper/221:41:278
3971717993131,0cyclictest0-21swapper/122:36:381
3971714993130,1cyclictest1774-21snmpd19:52:500
3971759993029,1cyclictest1774-21snmpd22:59:307
3971759993029,1cyclictest1774-21snmpd19:51:567
397175999300,30cyclictest0-21swapper/1520:24:187
397175999300,1cyclictest0-21swapper/1522:24:567
397175999300,1cyclictest0-21swapper/1522:15:177
397175699305,0cyclictest0-21swapper/1400:23:096
3971756993030,0cyclictest0-21swapper/1422:55:556
3971756993029,1cyclictest1774-21snmpd23:58:326
3971756993029,1cyclictest1774-21snmpd21:58:156
3971756993029,1cyclictest1774-21snmpd21:58:156
3971756993029,1cyclictest1774-21snmpd19:10:376
3971756993029,1cyclictest0-21swapper/1400:05:326
397175699300,30cyclictest1491rcuc/1421:10:206
397175699300,30cyclictest0-21swapper/1420:37:466
3971754993029,1cyclictest0-21swapper/1320:52:235
397175499300,30cyclictest0-21swapper/1320:14:095
397175499300,30cyclictest0-21swapper/1300:36:485
397175499300,29cyclictest0-21swapper/1319:11:465
3971749993029,1cyclictest1774-21snmpd23:31:394
3971749993029,1cyclictest1774-21snmpd22:54:384
3971749993029,1cyclictest1774-21snmpd00:23:404
3971749993029,1cyclictest0-21swapper/1222:08:344
397174999300,1cyclictest0-21swapper/1220:57:314
397174899300,1cyclictest0-21swapper/1122:54:053
3971744993029,1cyclictest1774-21snmpd22:24:312
3971744993029,1cyclictest0-21swapper/1022:52:152
397174499300,30cyclictest0-21swapper/1020:59:502
397174499300,1cyclictest0-21swapper/1023:00:422
3971738993029,1cyclictest1774-21snmpd00:25:4414
3971738993029,1cyclictest1774-21snmpd00:14:2914
397173899300,27cyclictest0-21swapper/820:15:1514
397173899300,1cyclictest0-21swapper/823:40:1514
3971735993029,1cyclictest4037642-21mii-tool20:25:1513
3971733993029,1cyclictest1774-21snmpd19:27:3512
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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