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2026-05-03 - 16:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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.

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 rackeslot4s.osadl.org (updated Sun May 03, 2026 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2123696994842,4cyclictest2341286-21apt-get10:40:121
2123704994539,4cyclictest252-21systemd-journal10:55:153
2123696994033,5cyclictest2367031-21apt-get11:05:111
2123704993932,5cyclictest2268398-21latency_hist09:30:013
2123699993935,3cyclictest2123887-21kworker/u8:1+flush-259:008:50:142
2123699993833,3cyclictest252-21systemd-journal09:02:092
2123696993833,4cyclictest2123887-21kworker/u8:1+flush-259:009:40:231
2123694993733,3cyclictest2366534-21kworker/u8:3+flush-259:011:15:210
2123696993529,4cyclictest252-21systemd-journal08:57:111
2123694993531,3cyclictest2371928-21kworker/u8:0+flush-259:011:20:150
2123694993531,3cyclictest2123887-21kworker/u8:1+flush-259:007:50:230
2123696993430,3cyclictest2371928-21kworker/u8:0+events_unbound11:25:211
2123694993330,2cyclictest2371928-21kworker/u8:0+flush-259:011:15:010
2123694993329,2cyclictest2258088-21true09:19:590
2123694993228,3cyclictest2139398-21apt-get07:25:120
2123704993124,5cyclictest2288560-21ntpq09:45:203
2123696993126,4cyclictest2361863-21/usr/sbin/munin11:00:151
2123694993026,3cyclictest252-21systemd-journal08:45:000
2123699992924,3cyclictest2325848-21apt-get10:25:132
2123704992822,4cyclictest2377329-21/usr/sbin/munin11:15:203
2123696992824,3cyclictest2118546-21kworker/u8:0+events_unbound07:20:211
2123696992823,3cyclictest2180702-21apt-get08:05:111
2123694992824,3cyclictest2123887-21kworker/u8:1+events_unbound09:40:220
2123694992823,3cyclictest2408039-21kworker/u8:1+events_unbound11:49:590
2123694992822,5cyclictest2123887-21kworker/u8:1+flush-259:009:10:010
2123696992724,2cyclictest2377113-21kworker/u8:1+flush-259:011:20:011
2123696992720,5cyclictest2403129-21apt-get11:40:131
2123694992723,3cyclictest2123887-21kworker/u8:1+flush-259:007:10:240
2123694992722,4cyclictest2263481-21/usr/sbin/munin09:25:240
2123694992722,3cyclictest2170375-21apt-get07:55:130
2123694992720,5cyclictest2324713-21ntpq10:20:200
2123696992623,2cyclictest2206110-21kworker/u8:0+flush-259:008:30:201
2123696992622,3cyclictest2330757-21kworker/u8:1+events_unbound10:55:231
2123696992622,3cyclictest2123887-21kworker/u8:1+flush-259:007:10:201
2123696992620,4cyclictest2377091-21latency_hist11:15:011
2123696992619,5cyclictest2153758-21ntpq07:35:191
2123694992622,3cyclictest2273586-21kworker/u8:2+flush-259:010:15:250
2123694992622,3cyclictest2273586-21kworker/u8:2+flush-259:010:15:240
2123699992522,2cyclictest2123887-21kworker/u8:1+flush-259:008:35:212
2123699992520,4cyclictest2123887-21kworker/u8:1+flush-259:009:25:232
2123696992522,2cyclictest64996-21kworker/u8:2+events_unbound07:15:231
2123696992522,2cyclictest2408039-21kworker/u8:1+events_unbound11:50:141
2123696992521,3cyclictest2408040-21kworker/u8:4+events_unbound11:55:251
2123696992521,3cyclictest2118546-21kworker/u8:0+events_unbound07:40:211
2123696992520,4cyclictest2258065-21latency_hist09:20:001
2123696992520,3cyclictest2170337-21kworker/u8:3+flush-259:007:55:171
2123694992521,3cyclictest2408039-21kworker/u8:1+events_unbound11:55:290
2123694992521,3cyclictest2123887-21kworker/u8:1+flush-259:008:10:210
2123694992519,4cyclictest2435188-21diskstats12:10:130
2123694992519,4cyclictest2200131-21ntpq08:20:200
2123694992518,5cyclictest2396880-21ntpq11:30:210
2123694992518,5cyclictest2315242-21latency_hist10:15:010
2123699992419,3cyclictest2300001-21/usr/sbin/munin10:00:142
2123699992418,4cyclictest2346583-21diskstats10:45:142
2123699992417,5cyclictest252-21systemd-journal11:05:012
2123696992420,3cyclictest2309450-21kworker/u8:4+flush-259:010:30:221
2123696992420,3cyclictest2118546-21kworker/u8:0+flush-259:008:05:001
2123694992421,2cyclictest2330757-21kworker/u8:1+flush-259:010:45:010
2123694992420,3cyclictest2309450-21kworker/u8:4+events_unbound10:10:010
2123694992420,3cyclictest2309450-21kworker/u8:4+events_unbound10:10:000
2123694992420,3cyclictest2263008-21kworker/u8:0+events_unbound09:30:190
2123694992420,3cyclictest2118546-21kworker/u8:0+events_unbound07:35:230
2123694992419,4cyclictest2123887-21kworker/u8:1+events_unbound08:00:120
2123699992319,3cyclictest2408039-21kworker/u8:1+flush-259:012:20:162
2123696992319,3cyclictest2330757-21kworker/u8:1+events_unbound10:45:161
2123694992318,4cyclictest2263008-21kworker/u8:0+events_unbound09:35:020
2123694992317,4cyclictest2222297-21apt-get08:45:120
2123694992317,4cyclictest2195928-21kworker/u8:2+flush-259:008:25:200
2123704992218,2cyclictest2330975-21apt-get10:30:103
2123704992217,3cyclictest2253192-21apt-get09:15:113
2123704992217,3cyclictest2123887-21kworker/u8:1+flush-259:010:05:183
2123704992217,3cyclictest2123887-21kworker/u8:1+flush-259:010:05:173
2123704992216,4cyclictest2414280-21/usr/sbin/munin11:50:203
2123704992216,4cyclictest2211720-21awk08:35:013
2123699992217,4cyclictest2309450-21kworker/u8:4+flush-259:010:30:242
2123696992218,3cyclictest2263008-21kworker/u8:0+events_unbound09:35:161
2123694992218,3cyclictest2408040-21kworker/u8:4+events_unbound12:35:210
2123694992218,3cyclictest2118546-21kworker/u8:0+events_unbound07:30:250
2123694992217,4cyclictest2206110-21kworker/u8:0+events_unbound09:14:500
2123694992217,3cyclictest64996-21kworker/u8:2+flush-259:007:15:200
2123699992117,3cyclictest2123887-21kworker/u8:1+flush-259:009:10:172
2123699992117,2cyclictest509-21rs:main2
2123696992118,2cyclictest2273586-21kworker/u8:2+events_unbound09:45:221
2123696992117,3cyclictest2170337-21kworker/u8:3+events_unbound08:10:151
2123696992116,3cyclictest2408698-21apt-get11:45:131
2123696992115,4cyclictest252-21systemd-journal10:25:001
2123694992118,2cyclictest2371928-21kworker/u8:0+flush-259:012:20:210
2123694992118,2cyclictest2206110-21kworker/u8:0+flush-259:008:50:220
2123694992117,3cyclictest2123887-21kworker/u8:1+flush-259:009:05:000
2123694992114,5cyclictest252-21systemd-journal11:55:000
2123704992017,2cyclictest2366534-21kworker/u8:3+flush-259:011:30:173
2123699992015,4cyclictest2289134-21kworker/u8:0+flush-259:009:59:592
2123696992017,2cyclictest2371928-21kworker/u8:0+events_unbound12:25:231
2123696992017,2cyclictest2118546-21kworker/u8:0+events_unbound07:30:231
2123696992016,3cyclictest2123887-21kworker/u8:1+flush-259:008:55:001
2123696992014,4cyclictest2201287-21/usr/sbin/munin08:25:171
2123694992016,3cyclictest2371928-21kworker/u8:0+events_unbound12:05:220
2123694992016,3cyclictest2366534-21kworker/u8:3+flush-259:011:10:000
2123694992013,5cyclictest2138289-21ntpq07:20:210
2123699991914,4cyclictest2268830-21diskstats09:30:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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