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2026-08-11 - 21:56

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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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 50 highest latencies:
System rackbslot8s (updated Tue Aug 11, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21264042121106,9sleep60-21swapper/607:08:416
21262042116101,10sleep30-21swapper/307:05:503
21264892114100,9sleep70-21swapper/707:09:547
21262792114100,9sleep40-21swapper/407:06:554
2126268211398,10sleep20-21swapper/207:06:452
2126320211298,9sleep00-21swapper/007:07:300
2126211211298,9sleep10-21swapper/107:05:551
2126457211196,9sleep50-21swapper/507:09:285
2126737991030,100cyclictest0-21swapper/210:10:172
212675499102100,2cyclictest553-21snmpd10:35:486
212675499102100,2cyclictest553-21snmpd10:35:486
21267499910299,3cyclictest553-21snmpd07:54:275
21267379910299,2cyclictest553-21snmpd08:22:412
2126737991020,102cyclictest0-21swapper/207:35:002
21267339910299,3cyclictest553-21snmpd10:24:331
21267339910299,3cyclictest553-21snmpd07:52:221
2126758991010,100cyclictest0-21swapper/711:19:437
2126758991010,100cyclictest0-21swapper/708:10:507
2126758991010,100cyclictest0-21swapper/707:47:347
21267499910199,2cyclictest553-21snmpd10:27:365
21267499910199,2cyclictest553-21snmpd08:39:035
21267499910198,3cyclictest553-21snmpd09:54:165
21267499910198,3cyclictest553-21snmpd09:13:125
212674999101100,1cyclictest553-21snmpd11:48:095
2126749991010,100cyclictest0-21swapper/507:38:015
21267469910199,2cyclictest553-21snmpd12:08:374
212674699101100,1cyclictest553-21snmpd12:12:484
21267419910199,2cyclictest553-21snmpd12:19:453
21267419910197,0cyclictest553-21snmpd08:44:143
21267379910199,2cyclictest553-21snmpd10:37:002
21267379910199,2cyclictest553-21snmpd10:37:002
2126737991010,99cyclictest0-21swapper/211:22:582
2126737991010,99cyclictest0-21swapper/211:03:062
2126737991010,99cyclictest0-21swapper/207:34:242
2126737991010,100cyclictest0-21swapper/208:54:122
2126737991010,100cyclictest0-21swapper/207:58:282
21267339910199,2cyclictest553-21snmpd09:18:391
212673399101100,1cyclictest553-21snmpd07:44:301
2126733991010,101cyclictest0-21swapper/112:14:361
2126733991010,100cyclictest0-21swapper/108:44:171
2126733991010,100cyclictest0-21swapper/107:19:471
21267299910199,1cyclictest553-21snmpd09:07:040
2126729991010,100cyclictest0-21swapper/012:14:060
2126758991000,99cyclictest0-21swapper/710:39:557
2126758991000,99cyclictest0-21swapper/710:39:547
2126758991000,99cyclictest0-21swapper/709:12:127
21267549910099,1cyclictest553-21snmpd12:31:306
21267549910099,1cyclictest553-21snmpd11:31:556
21267549910099,1cyclictest553-21snmpd08:51:326
21267549910099,1cyclictest553-21snmpd08:19:136
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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