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2026-06-26 - 15:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, 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.

Total number of samples: 50 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 rack4slot6s.osadl.org (updated Fri Jun 26, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
561222550,3sleep05613-21switchtime08:45:270
12020214421,32sleep012021-21ntp_states07:05:210
1450921250,3chrt14507-21grep11:25:260
129289912427,17cyclictest4235-21/usr/sbin/munin08:40:260
3193521230,3chrt31936-21latency_hist12:35:010
2370521230,3chrt23702-21grep07:50:230
12928991229,18cyclictest2550-21memory10:40:180
129289911927,14cyclictest22659-21sshd11:58:210
129289911832,15cyclictest31842-21runrttasks10:27:520
129289911828,15cyclictest25641-21/usr/sbin/munin12:10:110
129289911826,14cyclictest19074-21runrttasks07:32:440
129289911729,14cyclictest5634-21runrttasks10:51:190
129289911530,12cyclictest19884-21/usr/sbin/munin09:40:270
129289911529,14cyclictest30598-21runrttasks12:29:480
129289911512,18cyclictest10391-21ntp_states11:10:230
129289911428,15cyclictest16326-21runrttasks11:34:160
129289911428,14cyclictest14393-21seq07:15:180
129289911327,14cyclictest30477-21runrttasks08:16:010
129289911323,17cyclictest27522-21ntpq08:05:210
129289911231,11cyclictest16604-21runrttasks07:23:330
129289911225,15cyclictest31980-21runrttasks08:22:340
129289911225,15cyclictest16549-21runrttasks11:35:100
129289911225,14cyclictest4889-21latency_hist10:50:010
129289911225,14cyclictest1740-21switchtime08:30:280
129289911213,21cyclictest24605-21ntp_states12:05:230
129289911126,15cyclictest28522-21/usr/sbin/munin08:10:250
129289911126,14cyclictest13820-21runrttasks11:24:450
129289911124,15cyclictest20109-21runrttasks11:48:290
129289911123,15cyclictest7180-21runrttasks08:52:020
12928991109,25cyclictest23208-21memory12:00:180
12928991109,18cyclictest18108-21ntpq11:40:180
129289911026,14cyclictest26563-21runrttasks08:00:310
129289911026,14cyclictest2037-21runrttasks10:38:370
129289911012,17cyclictest27346-21ntp_states10:10:220
129289911010,21cyclictest28445-21ntpq12:20:200
12928991099,29cyclictest7520-21/usr/sbin/munin11:00:190
12928991098,16cyclictest16024-21/usr/sbin/munin09:25:290
129289910927,14cyclictest9926-21runrttasks11:09:440
129289910922,14cyclictest24023-21runrttasks09:57:270
129289910910,13cyclictest9265-21ntp_states09:00:220
1703721080,3sleep017056-21open_inodes09:30:230
12928991088,15cyclictest3582-21sshd08:39:210
12928991088,13cyclictest7778-21cat08:55:140
129289910827,16cyclictest18909-21runrttasks09:37:500
129289910824,13cyclictest30574-21runrttasks10:23:010
12928991077,16cyclictest19773-21/usr/sbin/munin07:35:210
129289910726,14cyclictest11104-21sshd09:07:210
12928991069,15cyclictest12507-21seq09:13:180
12928991069,13cyclictest20715-21ntp_states11:50:220
12928991068,14cyclictest22494-21systemctl07:45:270
129289910620,15cyclictest27161-21runrttasks12:15:200
12928991059,15cyclictest32699-21ntpq08:25:230
12928991057,15cyclictest26944-21munin-run10:10:000
129289910512,18cyclictest20910-21ntp_states09:45:240
129289910510,23cyclictest29605-21cut10:20:020
12928991048,16cyclictest32234-21missed_timers12:35:180
12928991047,14cyclictest24787-21ntp_states10:00:250
12928991047,13cyclictest20981-21memory07:40:180
129289910310,13cyclictest14278-21/usr/sbin/munin09:20:140
12928991028,12cyclictest6259-21df10:55:110
12928991027,14cyclictest24643-21/usr/sbin/munin07:55:150
129289910211,12cyclictest13005-21wc09:15:170
129289910110,13cyclictest11887-21switchtime11:15:270
1292899998,13cyclictest137432sleep007:11:230
12928995727,20cyclictest22949-21runrttasks09:54:120
1292899569,18cyclictest17169-21ntpq07:25:180
12928995530,16cyclictest622-21runrttasks10:32:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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