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2025-07-06 - 03:32

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Sun Jul 06, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
296142115104,6sleep30-21swapper/319:06:013
29684211193,12sleep10-21swapper/119:06:561
86821080,1sleep3866-21irqstats22:35:183
29643210883,6sleep00-21swapper/019:06:230
29660210789,12sleep20-21swapper/219:06:362
2995499340,17cyclictest0-21swapper/323:10:123
2995199290,13cyclictest0-21swapper/020:00:140
120602240,1sleep337-21rcuc/321:40:183
69032220,1sleep10-21swapper/122:40:341
2995499210,19cyclictest0-21swapper/300:25:123
2995299210,19cyclictest332250irq/24-eth100:15:131
2995199210,16cyclictest0-21swapper/022:44:050
2995199210,16cyclictest0-21swapper/022:31:050
2995199210,16cyclictest0-21swapper/021:11:050
29952992015,3cyclictest332250irq/24-eth122:45:141
2995299200,18cyclictest0-21swapper/100:25:111
2995199200,2cyclictest0-21swapper/019:45:110
2995199200,2cyclictest0-21swapper/019:20:110
2995499190,17cyclictest0-21swapper/320:55:133
29953991915,3cyclictest20935-21kworker/u8:022:01:052
2995399191,2cyclictest0-21swapper/221:14:052
2995199190,18cyclictest0-21swapper/023:55:130
2995199190,17cyclictest0-21swapper/000:00:150
2995399182,2cyclictest29013-1kworker/u9:123:51:052
2995399182,2cyclictest0-21swapper/223:14:052
29953991815,2cyclictest8227-21kworker/u8:022:24:052
29953991815,2cyclictest5602-21kworker/u8:119:53:052
29953991815,2cyclictest5602-21kworker/u8:119:37:052
29953991815,2cyclictest5240-21kworker/u8:120:58:052
29953991815,2cyclictest5240-21kworker/u8:120:50:052
29953991815,2cyclictest28111-21kworker/u8:020:30:052
29953991815,2cyclictest28111-21kworker/u8:020:26:022
29953991815,2cyclictest28111-21kworker/u8:020:26:022
29953991815,2cyclictest27678-21kworker/u8:121:57:042
29953991815,2cyclictest26230-21kworker/u8:219:26:052
29953991815,2cyclictest26230-21kworker/u8:219:24:042
29953991815,2cyclictest26230-21kworker/u8:219:16:022
29953991815,2cyclictest20017-21kworker/u8:120:06:022
29953991815,2cyclictest18218-21kworker/u8:121:18:012
2995399181,2cyclictest0-21swapper/222:37:052
2995399181,15cyclictest0-21swapper/223:28:022
2995399181,15cyclictest0-21swapper/223:28:012
2995199180,17cyclictest0-21swapper/021:59:040
29953991714,2cyclictest8011-21kworker/u8:019:45:052
29953991714,2cyclictest31734-21kworker/u8:120:35:052
29953991714,2cyclictest2828-21kworker/u8:023:58:052
29953991714,2cyclictest2828-21kworker/u8:023:46:012
29953991714,2cyclictest27678-21kworker/u8:122:19:052
29953991714,2cyclictest20017-21kworker/u8:120:21:042
29953991714,2cyclictest18218-21kworker/u8:121:20:052
29953991714,2cyclictest17965-21kworker/u8:222:28:052
29953991714,2cyclictest13456-21kworker/u8:220:19:052
29953991714,2cyclictest13077-21kworker/u8:221:52:052
2995399170,2cyclictest0-21swapper/223:19:052
2995399170,2cyclictest0-21swapper/223:19:042
29951991714,2cyclictest6508-21kworker/u8:223:26:060
29951991714,2cyclictest6508-21kworker/u8:223:26:050
29951991714,2cyclictest5248-21kworker/u8:022:50:020
2995199170,16cyclictest0-21swapper/021:40:060
2995199170,15cyclictest0-21swapper/021:45:110
29954991611,3cyclictest30440-21sort22:00:003
29954991611,3cyclictest20772-21memory22:55:173
2995499161,13cyclictest0-21swapper/321:35:143
29953991613,2cyclictest6619-21kworker/u8:000:30:052
29953991613,2cyclictest5240-21kworker/u8:121:05:042
29953991613,2cyclictest29092-21kworker/u8:100:20:042
29953991613,2cyclictest29092-21kworker/u8:100:14:012
29953991613,2cyclictest28727-21kworker/u8:223:37:042
29953991613,2cyclictest1701-21kworker/u8:020:41:042
29953991613,2cyclictest14552-21kworker/u8:119:12:052
29953991613,2cyclictest14031-21kworker/u8:023:21:052
2995399161,2cyclictest23992-21ssh00:05:052
2995399161,2cyclictest0-21swapper/200:28:022
29953991611,3cyclictest22093-21hostname23:30:152
2995399160,2cyclictest0-21swapper/222:45:052
29952991611,3cyclictest0-21swapper/123:35:151
2995199160,2cyclictest0-21swapper/020:17:050
2995199160,15cyclictest0-21swapper/023:20:060
2995499152,7cyclictest0-21swapper/320:45:003
2995499152,7cyclictest0-21swapper/320:15:013
2995499151,12cyclictest14614-21if_err_eth019:50:163
29954991510,3cyclictest0-21swapper/300:20:183
2995499150,13cyclictest24489-21fschecks_count20:15:153
2995499150,13cyclictest13738-21diskmemload21:20:233
2995499150,13cyclictest13640-21sh22:48:233
2995499150,13cyclictest0-21swapper/323:27:343
2995499150,13cyclictest0-21swapper/323:27:333
2995499150,13cyclictest0-21swapper/322:40:063
2995399152,2cyclictest0-21swapper/221:39:052
2995399151,2cyclictest0-21swapper/200:17:052
29953991512,2cyclictest28727-21kworker/u8:223:42:052
2995399150,13cyclictest0-21swapper/220:02:052
29952991512,2cyclictest17591-21ssh00:30:261
2995299151,12cyclictest21085-21ssh22:22:551
2995299150,1cyclictest13738-21diskmemload22:39:071
2995299150,13cyclictest20619-21http_loadtime20:05:161
2995299150,13cyclictest0-21swapper/122:05:251
2995299150,13cyclictest0-21swapper/120:10:191
29951991512,2cyclictest23083-1kworker/u9:223:31:070
29951991512,2cyclictest18218-21kworker/u8:121:50:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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