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2025-07-02 - 13:02

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 highest latencies:
System rack4slot6s.osadl.org (updated Wed Jul 02, 2025 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1684622710,2sleep016848-21latency_hist20:20:020
294922470,2sleep02947-21mailstats21:30:280
736121310,3chrt7359-21ls23:55:020
311449911081,18cyclictest11204-21latency_hist00:10:000
311449911076,22cyclictest14273-21/usr/sbin/munin20:10:170
1526621100,3sleep015269-21munin-run22:20:020
311449910983,15cyclictest12147-21cat20:00:290
311449910979,19cyclictest29860-21ntpq23:15:210
311449910978,18cyclictest27315-21ntp_states23:05:290
311449910882,14cyclictest28879-21/usr/sbin/munin23:10:280
311449910881,15cyclictest15340-21cat00:25:170
311449910879,15cyclictest3824-21df_inode21:35:120
311449910871,13cyclictest32242-21munin-run21:20:010
311449910782,14cyclictest8617-21munin-run00:00:000
311449910781,17cyclictest6422-21sendmail-msp19:40:010
311449910781,15cyclictest23910-21seq22:51:570
311449910780,16cyclictest28737-21ntpq21:05:210
311449910779,15cyclictest9261-21ls00:00:290
311449910776,20cyclictest5298-21/usr/sbin/munin23:45:280
311449910682,14cyclictest16548-21sh00:30:120
311449910678,16cyclictest6532-21sed21:45:160
311449910677,16cyclictest6015-21seq21:43:170
2607121060,4sleep026127-21/usr/sbin/munin20:55:210
311449910578,16cyclictest4243-21ntp_states19:30:260
311449910578,16cyclictest25187-21users20:50:280
311449910578,16cyclictest1649-21ntpq19:20:220
311449910480,13cyclictest269-21runrttasks20:30:260
311449910479,14cyclictest19546-21ntp_states22:35:240
311449910478,17cyclictest17785-21grep00:35:130
311449910478,15cyclictest13793-21munin-run00:20:010
311449910478,13cyclictest16983-21ntp_states22:25:250
311449910477,15cyclictest21698-21chrt22:44:530
311449910473,16cyclictest20727-21/usr/sbin/munin20:35:310
311449910467,22cyclictest13932-21/usr/sbin/munin00:20:250
311449910458,21cyclictest31497-21users23:20:300
311449910379,15cyclictest17020-21irqstats20:20:180
311449910376,17cyclictest7957-21awk21:50:250
311449910376,16cyclictest9169-21netstat21:55:200
311449910376,16cyclictest31294-21df19:10:140
311449910376,16cyclictest12981-21seq20:05:100
311449910376,15cyclictest560-21seq23:27:250
311449910376,15cyclictest24707-21ntp_states22:55:240
311449910376,15cyclictest12194-21seq00:12:410
311449910375,16cyclictest26768-21seq23:04:050
311449910374,17cyclictest9383-21ntp_offset19:50:210
311449910373,18cyclictest32572-21chrt21:20:190
311449910277,14cyclictest22083-21df20:40:140
311449910277,13cyclictest269-21runrttasks22:45:520
311449910276,14cyclictest2364-21munin-run21:30:000
311449910274,14cyclictest10393-21egrep19:55:140
311449910269,20cyclictest10640-21grep22:00:260
311449910264,21cyclictest2858-21memory19:25:200
311449910178,14cyclictest23365-21df20:45:130
311449910178,13cyclictest19065-21runrttasks22:34:320
311449910176,14cyclictest27452-21ntpq21:00:200
311449910174,14cyclictest29775-21/usr/sbin/munin21:10:280
311449910078,12cyclictest18254-21basename20:25:170
311449910076,14cyclictest4197-21users23:40:330
311449910074,14cyclictest7703-21munin-run19:45:010
311449910074,14cyclictest1270-21modprobe19:20:010
31144999975,14cyclictest269-21runrttasks23:39:330
31144999972,14cyclictest13699-21chrt22:12:520
31144999872,15cyclictest1302-21ntp_states23:30:250
31144999872,14cyclictest12734-21ls22:10:010
31144999866,20cyclictest108-21systemd-journal19:46:490
31144999773,14cyclictest15696-21ntp_states22:20:240
31144999365,15cyclictest31174-21ls19:10:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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