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2025-12-21 - 17:34

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Sun Dec 21, 2025 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
614321540,3sleep06142-21wc08:30:180
360421470,2sleep03605-21/usr/sbin/munin10:25:250
1896421300,3sleep018965-21cat07:15:000
2944421150,4chrt29445-21/usr/sbin/munin10:00:190
2042121150,3sleep020370-21/usr/sbin/munin07:20:110
1120421140,3chrt11205-21/usr/sbin/munin08:50:140
445321120,3chrt4455-21forks12:35:150
520121020,4sleep05273-21users08:25:250
74422960,4sleep07447-21/usr/sbin/munin10:40:220
242232957,11sleep024221-21ntp_states11:45:210
167632940,3sleep016767-21ntpq07:05:230
270092938,69sleep026820-21/usr/sbin/munin07:45:220
239512936,12sleep023952-21cron09:40:000
101202910,3sleep010186-21cut10:50:270
112532890,3sleep011279-21ntpq10:55:200
34142850,3sleep03097-21/usr/sbin/munin12:30:250
174752810,3sleep017541-21latency_hist09:15:010
1766999669,27cyclictest13603-21/usr/sbin/munin11:05:260
17669996527,28cyclictest29196-21/usr/sbin/munin12:05:160
17669996333,22cyclictest24281-21/usr/sbin/munin09:40:170
1766999627,19cyclictest21347-21/usr/sbin/munin11:35:310
17669996135,16cyclictest24488-21/usr/sbin/munin07:35:210
17669996131,23cyclictest28870-21runrttasks07:51:530
17669996131,21cyclictest30886-21/usr/sbin/munin10:05:260
17669996123,14cyclictest32743-21runrttasks08:06:460
17669996117,15cyclictest8745-21cat08:40:180
17669996035,16cyclictest30970-21/usr/sbin/munin08:00:200
17669996034,16cyclictest25496-21/usr/sbin/munin11:50:210
17669996024,13cyclictest13124-21sshd11:02:090
17669996010,18cyclictest3267-21munin-run08:20:000
193772590,3sleep019378-21mailstats09:20:260
1766999599,16cyclictest17593-21/usr/sbin/munin09:15:210
17669995934,16cyclictest19652-21/usr/sbin/munin07:15:280
17669995933,15cyclictest18942-21/usr/sbin/munin11:25:170
17669995922,14cyclictest27125-21runrttasks11:55:380
17669995921,12cyclictest2971-21ls12:30:000
1766999589,17cyclictest30553-21munin-run08:00:000
1766999588,16cyclictest4823-21grep10:30:210
1766999588,15cyclictest8436-21/usr/sbin/munin10:45:270
17669995836,14cyclictest23173-21/usr/sbin/munin11:40:280
17669995811,32cyclictest926-21ntpq10:15:220
1766999579,16cyclictest28090-21awk12:00:220
1766999578,18cyclictest21527-21/usr/sbin/munin09:30:160
1766999578,15cyclictest27974-21/usr/sbin/munin09:55:330
1766999578,15cyclictest20241-21/usr/sbin/munin09:25:260
1766999578,15cyclictest16172-21/usr/sbin/munin11:15:260
17669995735,14cyclictest15294-21/usr/sbin/munin11:10:240
17669995734,15cyclictest14666-21runrttasks09:03:120
17669995733,16cyclictest12526-21/usr/sbin/munin08:55:160
17669995732,16cyclictest21807-21/usr/sbin/munin07:25:180
17669995730,16cyclictest7418-21/usr/sbin/munin08:35:170
17669995730,16cyclictest2404-21/usr/sbin/munin10:20:260
17669995728,20cyclictest16220-21latency_hist09:10:020
17669995711,14cyclictest17490-21/usr/sbin/munin11:20:150
1766999568,15cyclictest31962-21ntp_states12:15:230
1766999568,15cyclictest20064-21/usr/sbin/munin11:30:320
17669995634,13cyclictest3615-21/usr/sbin/munin08:20:200
17669995629,16cyclictest25720-21/usr/sbin/munin09:45:250
17669995629,16cyclictest25583-21/usr/sbin/munin07:40:120
17669995612,17cyclictest6029-21memory10:35:170
17669995612,16cyclictest30673-21ntp_states12:10:220
1766999557,15cyclictest809-21ntp_states12:20:220
17669995510,16cyclictest26829-21irqstats09:50:170
1766999549,15cyclictest32138-21ntp_states10:10:220
17669995419,12cyclictest988-21/usr/sbin/munin08:10:170
1766999537,14cyclictest23458-21awk07:30:280
17669995310,15cyclictest9914-21chrt08:45:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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