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2026-04-08 - 14:30

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Wed Apr 08, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17905211795,16sleep20-21swapper/207:08:142
17918211693,18sleep00-21swapper/007:08:240
18025211593,16sleep30-21swapper/307:09:473
17853210080,14sleep10-21swapper/107:07:341
299732730,0sleep20-21swapper/210:45:172
206142690,0sleep20-21swapper/212:16:072
203072570,0sleep00-21swapper/009:29:020
167072570,0sleep20-21swapper/211:39:162
121552330,1sleep337-21rcuc/311:00:163
1807399230,21cyclictest0-21swapper/310:20:023
1807399230,21cyclictest0-21swapper/310:20:023
1807199221,19cyclictest0-21swapper/110:55:101
1807199220,20cyclictest0-21swapper/110:20:011
1807199220,20cyclictest0-21swapper/110:20:011
317352210,1sleep20-21swapper/211:20:272
1807399211,18cyclictest30579-21ssh11:20:113
1807199211,2cyclictest0-21swapper/108:55:101
313212200,1sleep00-21swapper/009:40:120
195612200,2sleep011-21rcuc/012:15:160
18072992017,2cyclictest32172-21kworker/u8:009:38:052
1807199200,2cyclictest0-21swapper/112:05:111
18072991916,2cyclictest14696-21kworker/u8:110:59:042
18071991914,3cyclictest25383-21latency_hist11:15:011
1807199191,16cyclictest0-21swapper/110:45:101
1807399171,14cyclictest17976-21ssh10:00:103
18072991714,2cyclictest32172-21kworker/u8:009:10:052
1807399160,14cyclictest0-21swapper/307:45:103
1807299160,14cyclictest16926-21ssh10:31:352
1807199161,3cyclictest29145-21ntpq12:25:171
18071991612,2cyclictest0-21swapper/111:41:581
277122150,3sleep027726-21ssh10:43:220
1807399151,12cyclictest24811-21ssh12:20:463
1807399151,12cyclictest10302-21df_inode08:10:133
18073991510,3cyclictest24947-21modprobe10:40:143
1807399150,2cyclictest1721-21apt-get09:10:103
1807399150,13cyclictest4635-21latency_hist10:20:003
1807399150,13cyclictest4635-21latency_hist10:20:003
1807399150,13cyclictest23538-21kernelversion10:05:153
1807399150,13cyclictest17661-21basename11:40:113
1807399150,13cyclictest0-21swapper/311:45:113
1807299151,2cyclictest0-21swapper/208:40:112
18072991512,2cyclictest6447-21kworker/u8:212:12:052
18072991512,2cyclictest2405-21kworker/u8:210:17:042
18072991512,2cyclictest2405-21kworker/u8:210:17:042
1807299151,12cyclictest26377-21ssh10:08:332
1807299151,12cyclictest0-21swapper/210:25:142
1807299151,12cyclictest0-21swapper/210:25:132
1807299150,14cyclictest0-21swapper/208:50:162
1807299150,13cyclictest0-21swapper/210:10:462
1807199151,3cyclictest0-21swapper/109:15:021
1807199151,12cyclictest2979-21apt-get09:45:051
18071991510,3cyclictest0-21swapper/110:15:211
18071991510,3cyclictest0-21swapper/110:15:211
18071991510,3cyclictest0-21swapper/109:40:151
1807199150,13cyclictest0-21swapper/111:36:481
1807099150,13cyclictest30852-21ssh12:27:070
81632140,3sleep20-21swapper/212:37:082
1807399149,3cyclictest0-21swapper/309:05:003
1807399142,6cyclictest0-21swapper/309:00:003
1807399141,2cyclictest10639-21ssh09:51:403
18073991411,2cyclictest27633-21rm10:10:103
18073991411,2cyclictest0-21swapper/308:05:113
1807399140,3cyclictest0-21swapper/312:08:513
1807399140,2cyclictest0-21swapper/310:46:503
1807399140,13cyclictest0-21swapper/310:56:003
1807399140,12cyclictest24908-21smartctl07:25:143
1807399140,12cyclictest1405-21diskmemload09:35:133
1807399140,12cyclictest0-21swapper/308:15:153
18072991411,2cyclictest6557-21kworker/u8:009:52:052
18072991411,2cyclictest5816-21kworker/u8:011:07:042
18072991411,2cyclictest31019-21kworker/u8:209:42:042
18072991411,2cyclictest28942-21kworker/u8:012:06:052
18072991411,2cyclictest2405-21kworker/u8:210:24:042
18072991411,2cyclictest2405-21kworker/u8:210:24:042
18072991411,2cyclictest20987-21kworker/u8:010:37:042
18072991411,2cyclictest16079-21apt-get09:25:062
18072991411,2cyclictest0-21swapper/208:45:102
1807299140,3cyclictest1405-21diskmemload11:16:282
1807299140,3cyclictest0-21swapper/211:32:262
1807299140,2cyclictest0-21swapper/212:00:142
1807299140,2cyclictest0-21swapper/211:53:562
1807299140,2cyclictest0-21swapper/207:25:162
1807199149,3cyclictest0-21swapper/111:55:121
18071991411,2cyclictest1405-21diskmemload12:35:181
18071991411,2cyclictest0-21swapper/111:31:481
18071991411,2cyclictest0-21swapper/110:42:281
18071991411,2cyclictest0-21swapper/110:36:081
18071991411,2cyclictest0-21swapper/109:53:371
18071991410,2cyclictest0-21swapper/109:10:111
1807199140,13cyclictest0-21swapper/110:31:181
1807199140,12cyclictest1405-21diskmemload12:00:001
1807199140,12cyclictest0-21swapper/109:28:251
18070991411,2cyclictest32172-21kworker/u8:009:18:040
18070991411,2cyclictest23810-21kworker/u8:111:19:040
60982130,2sleep30-21swapper/310:55:003
1807399132,6cyclictest6024-21apt-get08:00:003
1807399131,10cyclictest1856-21ssh11:56:393
18073991310,2cyclictest6708-21apt-get09:15:103
18073991310,2cyclictest0-21swapper/310:26:003
18073991310,2cyclictest0-21swapper/310:26:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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