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2026-05-18 - 19:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 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 rackbslot8s (updated Mon May 18, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
760550212495,9sleep20-21swapper/207:05:482
7606612122107,10sleep10-21swapper/107:07:241
7606332118106,8sleep00-21swapper/007:06:590
7608342114100,9sleep50-21swapper/507:09:515
760775211499,10sleep30-21swapper/307:09:023
760648211499,10sleep60-21swapper/607:07:126
7606402114100,9sleep70-21swapper/707:07:067
760691210994,10sleep40-21swapper/407:07:514
761068991030,100cyclictest0-21swapper/209:45:462
761088991020,100cyclictest0-21swapper/707:51:557
7610859910299,2cyclictest883852-21kworker/6:012:39:156
76108599102100,2cyclictest833967-21kworker/6:109:20:106
76108599102100,1cyclictest883852-21kworker/6:012:24:086
761085991020,101cyclictest0-21swapper/611:56:426
7610689910299,3cyclictest553-21snmpd10:56:562
76106399102100,2cyclictest553-21snmpd09:25:231
761088991010,101cyclictest0-21swapper/712:00:517
7610859910199,1cyclictest883852-21kworker/6:011:48:166
7610859910199,1cyclictest883852-21kworker/6:010:17:206
76108599101100,1cyclictest883852-21kworker/6:011:52:586
76108599101100,1cyclictest883852-21kworker/6:011:25:546
76108599101100,1cyclictest883852-21kworker/6:011:21:446
76108599101100,1cyclictest883852-21kworker/6:011:16:276
76108599101100,1cyclictest883852-21kworker/6:010:52:016
76108599101100,1cyclictest883852-21kworker/6:010:43:146
76108599101100,1cyclictest883852-21kworker/6:010:35:446
76108599101100,1cyclictest883852-21kworker/6:010:32:106
76108599101100,1cyclictest883852-21kworker/6:010:10:126
76108599101100,1cyclictest856113-21kworker/6:210:02:086
76108599101100,1cyclictest784329-21kworker/6:209:17:566
76108599101100,1cyclictest784329-21kworker/6:209:12:006
761081991010,100cyclictest0-21swapper/509:19:405
761081991010,100cyclictest0-21swapper/507:37:105
7610769910198,2cyclictest553-21snmpd10:10:274
7610739910199,1cyclictest553-21snmpd08:52:583
7610689910198,3cyclictest553-21snmpd12:17:012
7610689910198,3cyclictest553-21snmpd11:42:122
7610689910198,3cyclictest553-21snmpd11:04:172
7610689910198,3cyclictest553-21snmpd09:41:232
7610689910198,3cyclictest553-21snmpd08:06:382
761068991010,101cyclictest0-21swapper/208:04:232
761068991010,100cyclictest0-21swapper/211:37:152
761068991010,0cyclictest0-21swapper/210:05:512
761063991010,100cyclictest0-21swapper/110:48:281
7610569910199,2cyclictest553-21snmpd11:07:200
7610569910199,2cyclictest553-21snmpd09:51:560
7610569910198,3cyclictest553-21snmpd11:55:210
761056991010,100cyclictest0-21swapper/011:33:500
761056991010,100cyclictest0-21swapper/011:01:430
761056991010,100cyclictest0-21swapper/010:01:000
761056991010,100cyclictest0-21swapper/008:00:140
7610889910099,1cyclictest0-21swapper/712:13:247
7610889910099,1cyclictest0-21swapper/711:10:057
761088991000,99cyclictest0-21swapper/710:57:257
761088991000,99cyclictest0-21swapper/710:54:257
761088991000,99cyclictest0-21swapper/709:42:537
761088991000,1cyclictest0-21swapper/707:15:157
761088991000,100cyclictest0-21swapper/710:10:157
761088991000,100cyclictest0-21swapper/709:27:507
761088991000,100cyclictest0-21swapper/709:20:167
761088991000,100cyclictest0-21swapper/707:13:537
7610859910099,1cyclictest883852-21kworker/6:012:26:566
7610859910099,1cyclictest883852-21kworker/6:012:15:446
7610859910099,1cyclictest883852-21kworker/6:012:10:196
7610859910099,1cyclictest883852-21kworker/6:012:08:376
7610859910099,1cyclictest883852-21kworker/6:012:00:346
7610859910099,1cyclictest883852-21kworker/6:011:41:256
7610859910099,1cyclictest883852-21kworker/6:011:35:126
7610859910099,1cyclictest883852-21kworker/6:011:30:366
7610859910099,1cyclictest883852-21kworker/6:011:05:146
7610859910099,1cyclictest883852-21kworker/6:011:00:426
7610859910099,1cyclictest883852-21kworker/6:010:55:296
7610859910099,1cyclictest883852-21kworker/6:010:45:066
7610859910099,1cyclictest883852-21kworker/6:010:25:096
7610859910099,1cyclictest883852-21kworker/6:010:20:156
7610859910099,1cyclictest883852-21kworker/6:010:05:026
7610859910099,1cyclictest856113-21kworker/6:209:56:256
7610859910099,1cyclictest856113-21kworker/6:209:50:026
7610859910099,1cyclictest856113-21kworker/6:209:45:026
7610859910099,1cyclictest856113-21kworker/6:209:40:046
7610859910099,1cyclictest833967-21kworker/6:109:32:436
7610859910099,1cyclictest833967-21kworker/6:109:26:076
7610859910099,1cyclictest784329-21kworker/6:208:10:206
7610859910099,1cyclictest779302-21kworker/6:007:45:186
7610859910099,1cyclictest750484-21kworker/6:107:30:136
7610859910099,1cyclictest750484-21kworker/6:107:10:146
7610859910099,1cyclictest553-21snmpd08:23:446
7610859910099,1cyclictest553-21snmpd07:50:496
7610859910099,1cyclictest553-21snmpd07:18:486
7610859910099,1cyclictest1046511-21kworker/6:212:31:006
7610859910098,1cyclictest883852-21kworker/6:011:10:026
7610859910098,1cyclictest833967-21kworker/6:109:36:006
7610819910099,1cyclictest553-21snmpd09:55:235
7610819910099,1cyclictest553-21snmpd08:24:505
7610819910099,1cyclictest553-21snmpd07:56:195
7610819910099,1cyclictest553-21snmpd07:48:225
7610819910099,0cyclictest553-21snmpd10:15:005
76108199100100,0cyclictest553-21snmpd10:58:115
761081991000,99cyclictest0-21swapper/511:43:535
761081991000,99cyclictest0-21swapper/511:13:295
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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