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2026-09-20 - 21:49

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 Sun Sep 20, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1751269211991,23sleep10-21swapper/107:09:491
1751272211887,9sleep40-21swapper/407:09:514
17511982118104,9sleep60-21swapper/607:08:496
17511522118104,9sleep70-21swapper/707:08:107
17511922116102,9sleep00-21swapper/007:08:440
17511862115100,10sleep30-21swapper/307:08:383
1751064211499,10sleep20-21swapper/207:06:532
1750966210893,10sleep50-21swapper/507:05:275
1751551991053,0cyclictest59-21ksoftirqd/610:43:026
175155199103102,1cyclictest1980064-21kworker/6:012:32:286
17515499910399,4cyclictest553-21snmpd12:07:065
17515519910298,1cyclictest1857492-21kworker/6:110:11:276
1751532991020,0cyclictest0-21swapper/110:48:421
17515289910299,3cyclictest553-21snmpd08:44:200
17515289910299,3cyclictest553-21snmpd07:10:370
1751528991020,100cyclictest0-21swapper/010:06:550
17515519910199,2cyclictest1980064-21kworker/6:012:11:536
17515519910199,1cyclictest1857492-21kworker/6:111:12:306
175155199101100,1cyclictest1980064-21kworker/6:012:23:126
175155199101100,1cyclictest1980064-21kworker/6:012:18:326
175155199101100,1cyclictest1980064-21kworker/6:012:04:566
175155199101100,1cyclictest1980064-21kworker/6:011:51:326
175155199101100,1cyclictest1980064-21kworker/6:011:46:436
175155199101100,1cyclictest1980064-21kworker/6:011:40:186
175155199101100,1cyclictest1969022-21kworker/6:211:38:246
175155199101100,1cyclictest1969022-21kworker/6:211:31:506
175155199101100,1cyclictest1857492-21kworker/6:111:25:016
175155199101100,1cyclictest1857492-21kworker/6:111:20:536
175155199101100,1cyclictest1857492-21kworker/6:110:55:176
175155199101100,1cyclictest1857492-21kworker/6:110:48:546
175155199101100,1cyclictest1857492-21kworker/6:110:27:026
175155199101100,1cyclictest1857492-21kworker/6:110:22:126
175155199101100,1cyclictest1857492-21kworker/6:109:57:586
175155199101100,1cyclictest1857492-21kworker/6:109:57:586
175155199101100,1cyclictest1857492-21kworker/6:109:53:436
175155199101100,1cyclictest1835383-21kworker/6:009:46:336
175155199101100,1cyclictest1835383-21kworker/6:009:38:146
175155199101100,1cyclictest1813178-21kworker/6:109:11:586
17515499910199,2cyclictest553-21snmpd11:17:405
17515499910199,2cyclictest553-21snmpd09:41:035
17515499910199,2cyclictest553-21snmpd08:44:315
17515499910199,2cyclictest553-21snmpd07:49:365
17515499910199,2cyclictest553-21snmpd07:10:255
17515499910199,1cyclictest553-21snmpd08:15:125
17515499910198,3cyclictest553-21snmpd08:45:345
1751549991010,100cyclictest0-21swapper/511:49:125
1751549991010,100cyclictest0-21swapper/509:36:545
1751545991010,100cyclictest0-21swapper/407:34:464
17515409910199,2cyclictest553-21snmpd09:32:153
17515329910199,2cyclictest553-21snmpd12:38:511
1751532991010,100cyclictest0-21swapper/110:51:021
1751532991010,100cyclictest0-21swapper/108:15:091
1751532991010,0cyclictest0-21swapper/109:57:081
1751532991010,0cyclictest0-21swapper/109:57:071
17515289910199,2cyclictest553-21snmpd11:40:310
17515289910199,2cyclictest553-21snmpd08:55:340
1751528991010,101cyclictest0-21swapper/007:24:340
1751556991000,99cyclictest0-21swapper/710:08:377
1751556991000,99cyclictest0-21swapper/710:01:137
1751556991000,100cyclictest0-21swapper/712:15:187
1751556991000,100cyclictest0-21swapper/711:00:437
1751556991000,100cyclictest0-21swapper/707:51:207
17515519910099,1cyclictest1980064-21kworker/6:012:36:016
17515519910099,1cyclictest1980064-21kworker/6:012:25:126
17515519910099,1cyclictest1980064-21kworker/6:011:55:126
17515519910099,1cyclictest1857492-21kworker/6:111:15:026
17515519910099,1cyclictest1857492-21kworker/6:111:05:046
17515519910099,1cyclictest1857492-21kworker/6:111:00:036
17515519910099,1cyclictest1857492-21kworker/6:110:50:126
17515519910099,1cyclictest1857492-21kworker/6:110:35:176
17515519910099,1cyclictest1857492-21kworker/6:110:30:026
17515519910099,1cyclictest1857492-21kworker/6:110:15:306
17515519910099,1cyclictest1857492-21kworker/6:110:07:036
17515519910099,1cyclictest1857492-21kworker/6:110:00:106
17515519910099,1cyclictest1835383-21kworker/6:009:40:006
17515519910099,1cyclictest1835383-21kworker/6:009:30:066
17515519910099,1cyclictest1813178-21kworker/6:109:25:096
17515519910099,1cyclictest1813178-21kworker/6:109:20:136
17515519910099,1cyclictest1813178-21kworker/6:109:15:126
17515519910099,1cyclictest1795541-21kworker/6:208:55:176
17515519910099,1cyclictest1795541-21kworker/6:208:35:136
17515519910099,1cyclictest1770162-21kworker/6:108:03:206
17515519910099,1cyclictest1770162-21kworker/6:107:45:136
17515519910099,1cyclictest1729018-21kworker/6:207:20:016
17515519910099,1cyclictest1729018-21kworker/6:207:15:136
17515519910099,1cyclictest1729018-21kworker/6:207:10:146
1751551991000,100cyclictest0-21swapper/612:05:146
1751551991000,100cyclictest0-21swapper/608:31:446
17515499910099,1cyclictest553-21snmpd10:45:235
17515499910099,1cyclictest553-21snmpd09:46:435
17515499910099,1cyclictest553-21snmpd09:17:265
17515499910099,1cyclictest553-21snmpd08:29:195
17515499910099,1cyclictest1765839-21cat07:35:165
17515499910099,0cyclictest553-21snmpd10:04:285
17515499910098,2cyclictest553-21snmpd11:22:565
17515499910098,2cyclictest553-21snmpd11:08:365
17515499910098,2cyclictest553-21snmpd10:22:585
17515499910098,2cyclictest553-21snmpd09:02:425
1751549991000,99cyclictest0-21swapper/511:29:225
1751549991000,100cyclictest0-21swapper/510:31:305
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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