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2026-05-01 - 01:41

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 all highest latencies:
System rack4slot6s.osadl.org (updated Thu Apr 30, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
312222730,2sleep03123-21latency_hist08:35:020
87722650,3sleep0878-21/usr/sbin/munin08:25:240
293522560,2sleep02933-21grep10:35:250
2457521930,2sleep024571-21latency_hist12:00:020
667021230,2sleep06672-21latency10:50:150
2728721230,3chrt27288-21cpu12:10:120
2902921210,2sleep029030-21wc08:10:010
135129911829,16cyclictest9316-21/usr/sbin/munin11:00:180
135129911827,15cyclictest11335-21runrttasks11:07:440
135129911730,15cyclictest29892-21runrttasks12:20:100
135129911729,15cyclictest19070-21runrttasks11:37:430
794021160,4sleep07857-21/usr/sbin/munin10:55:160
135129911625,17cyclictest26193-21/usr/sbin/munin10:00:210
135129911517,13cyclictest12852-21latency_hist09:10:020
135129911429,15cyclictest1-21systemd12:25:010
135129911426,15cyclictest20866-21runrttasks07:37:080
135129911426,15cyclictest20710-21latency_hist11:45:010
135129911423,14cyclictest31659-21latency_hist08:20:020
135129911422,18cyclictest13303-21ntpq11:15:200
13512991137,15cyclictest13858-21ntpq07:10:160
135129911330,15cyclictest10019-21runrttasks08:58:320
135129911328,13cyclictest16641-21runrttasks09:24:310
135129911327,13cyclictest19384-21latency_hist09:35:020
135129911310,22cyclictest4262-21getprofile08:37:240
148521120,4sleep01512-21ntp_states12:35:200
135129911233,69cyclictest17986-21runrttasks11:34:220
135129911221,16cyclictest26621-21runrttasks12:05:580
13512991117,25cyclictest23989-21df07:50:120
13512991116,27cyclictest274272sleep008:02:500
135129911125,14cyclictest23248-21/usr/sbin/munin07:45:280
135129911121,15cyclictest19532-21runrttasks07:31:430
135129911118,14cyclictest22835-21runrttasks09:47:050
135129911110,15cyclictest32662-21ntp_states10:25:230
13512991107,15cyclictest12217-21/usr/sbin/munin11:10:260
135129911023,16cyclictest14288-21runrttasks09:15:120
135129911010,20cyclictest22072-21/usr/sbin/munin11:50:310
135129910929,15cyclictest4621-21runrttasks10:41:270
135129910924,14cyclictest21686-21runrttasks11:47:550
135129910924,13cyclictest25610-21runrttasks09:58:500
135129910923,15cyclictest18719-21latency_hist07:30:010
135129910913,16cyclictest1-21systemd07:20:440
135129910910,23cyclictest17025-21memory09:25:190
135129910910,15cyclictest1271-21fw_packets10:30:130
1065321090,5sleep010656-21ntp_states09:00:230
135129910827,16cyclictest7908-21runrttasks08:47:330
135129910827,14cyclictest21667-21runrttasks09:43:020
135129910811,20cyclictest31673-21users10:20:270
135129910811,18cyclictest28739-21ntpq10:10:210
135129910811,18cyclictest21840-21grep07:40:270
135129910810,24cyclictest25812-21users07:55:280
135129910810,18cyclictest15922-21ntp_states11:25:230
13512991077,16cyclictest14892-21/usr/sbin/munin07:15:270
135129910720,15cyclictest25686-21runrttasks12:03:520
135129910720,14cyclictest946-21ntpd09:50:190
135129910719,14cyclictest946-21ntpd08:20:210
135129910712,18cyclictest28567-21df12:15:090
135129910711,21cyclictest6084-21systemd10:47:550
135129910711,19cyclictest30055-21ntpq10:15:220
13512991068,18cyclictest27961-21sshd10:06:440
135129910619,13cyclictest1-21systemd08:41:440
135129910612,16cyclictest13128-21memory09:10:170
135129910522,14cyclictest276-21runrttasks09:35:220
135129910510,25cyclictest32454-21df12:30:110
13512991046,12cyclictest29694-21/usr/sbin/munin08:10:270
135129910410,18cyclictest14621-21ntpq11:20:190
13512991018,15cyclictest13537-21latency_hist07:10:020
1351299988,17cyclictest8775-21runrttasks08:53:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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