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2025-07-01 - 12:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Tue Jul 01, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
377014922580,8sleep20-21swapper/219:06:372
377418521110,5sleep00-21swapper/019:16:570
38556552990,8sleep22197014-21PK-Backend23:10:162
162399950,77rtkit-daemon0-21swapper/019:05:090
162399920,5rtkit-daemon0-21swapper/022:32:100
162399830,6rtkit-daemon0-21swapper/021:10:300
162399790,6rtkit-daemon0-21swapper/020:37:050
162399790,5rtkit-daemon0-21swapper/022:02:320
38701432750,9sleep30-21swapper/323:50:293
162399740,10rtkit-daemon970-21ntpd00:24:101
377032227341,26sleep10-21swapper/119:08:501
162399730,11rtkit-daemon970-21ntpd23:49:061
38810672720,5sleep10-21swapper/100:25:211
162399720,9rtkit-daemon881143-21gmain23:31:171
162399720,6rtkit-daemon970-21ntpd00:13:451
162399710,7rtkit-daemon970-21ntpd23:11:441
162399710,4rtkit-daemon0-21swapper/119:37:091
377026626954,9sleep30-21swapper/319:08:093
162399690,8rtkit-daemon970-21ntpd19:45:401
162399620,9rtkit-daemon1622-21rtkit-daemon23:50:271
377055599610,56cyclictest1622-21rtkit-daemon00:09:381
3770550996119,14cyclictest3882751-21df00:30:170
38621252600,14chrt1753-21gnome-shell23:30:013
3770550996029,26cyclictest3794237-21diskstats20:15:220
3770550996022,9cyclictest3810962-21mktemp21:05:020
3770550996022,9cyclictest3810962-21mktemp21:05:010
162399600,9rtkit-daemon1622-21rtkit-daemon23:55:270
3770550995819,12cyclictest3791272-21grep20:05:290
3770550995816,16cyclictest1753-21gnome-shell19:13:000
162399580,8rtkit-daemon1622-21rtkit-daemon20:12:580
377055099579,18cyclictest1753-21gnome-shell21:27:360
3770550995713,14cyclictest875-21polkitd19:50:370
3770550995710,16cyclictest1753-21gnome-shell20:34:540
38258712560,25sleep2331rcuc/221:45:272
3770550995612,14cyclictest3242255-21gdbus00:25:020
3770550995612,13cyclictest468-21systemd-udevd22:44:570
377055099559,16cyclictest1753-21gnome-shell21:47:070
377055099558,16cyclictest1753-21gnome-shell20:50:410
377055099558,16cyclictest1753-21gnome-shell20:21:060
377055099557,17cyclictest1753-21gnome-shell21:58:200
377055099553,24cyclictest3857963-21proc_pri23:15:270
3770550995519,7cyclictest3850218-21/usr/sbin/munin22:55:220
3770550995519,7cyclictest3850218-21/usr/sbin/munin22:55:220
3770550995514,11cyclictest3804397-21grep20:45:140
3770550995514,11cyclictest3804397-21grep20:45:140
3770550995510,16cyclictest1753-21gnome-shell21:10:000
162399550,8rtkit-daemon1622-21rtkit-daemon23:46:240
377055099549,17cyclictest1753-21gnome-shell23:10:110
377055099548,17cyclictest1753-21gnome-shell20:27:060
377055099548,16cyclictest1753-21gnome-shell00:13:460
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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