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2026-06-16 - 19:55

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 Tue Jun 16, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2039822630,2sleep020396-21grep08:15:190
586522410,3sleep05861-21cat07:20:010
2373321230,3sleep023735-21basename10:35:010
1751721190,3sleep017516-21open_files12:15:240
1283121160,3sleep012834-21tr07:45:250
3054721130,5chrt30548-21netstat11:00:190
32699910073,15cyclictest14723-21forks12:05:130
32699910070,18cyclictest4033-21chrt09:17:210
177732980,4sleep017581-21/usr/sbin/munin08:05:220
3269999670,17cyclictest25449-21ntp_states10:40:210
3269999670,15cyclictest21754-21runrttasks08:20:210
3269999667,15cyclictest276-21runrttasks08:28:410
3269999566,17cyclictest6802-21chrt09:28:490
3269999566,16cyclictest18820-21ntp_states12:20:220
3269999468,15cyclictest3319-21/usr/sbin/munin11:20:210
3269999468,15cyclictest15593-21seq07:55:330
3269999468,14cyclictest16686-21/usr/sbin/munin08:00:250
3269999467,14cyclictest24624-21runrttasks08:30:290
3269999467,14cyclictest18643-21latency_hist10:15:010
3269999466,17cyclictest27904-21/usr/sbin/munin08:45:170
3269999466,15cyclictest29247-21/usr/sbin/munin08:50:140
3269999465,17cyclictest24563-21runrttasks10:36:210
3269999465,16cyclictest16447-21open_inodes10:05:250
3269999464,15cyclictest10148-21/usr/sbin/munin07:35:250
3269999456,23cyclictest427-21/usr/sbin/munin11:10:130
3269999369,14cyclictest23057-21chrt12:36:010
3269999369,13cyclictest8256-21df11:40:130
3269999368,15cyclictest27024-21find08:40:250
3269999367,17cyclictest20412-21users12:25:290
3269999367,15cyclictest21283-21seq10:25:090
3269999268,13cyclictest27874-21irqstats10:50:170
3269999266,15cyclictest9674-21/usr/sbin/munin11:45:170
3269999266,14cyclictest4142-21seq07:11:530
3269999263,17cyclictest32207-21users11:05:290
3269999259,18cyclictest25605-21ntpq08:35:240
3269999258,22cyclictest12050-21/usr/sbin/munin11:55:150
3269999258,21cyclictest4516-21/usr/sbin/munin09:20:180
3269999165,16cyclictest7149-21/usr/sbin/munin09:30:130
3269999165,14cyclictest13202-21runrttasks09:53:290
3269999164,16cyclictest609-21/usr/sbin/munin09:05:170
3269999162,16cyclictest15015-21memory10:00:170
3269999158,20cyclictest2580-21chrt09:11:020
3269999067,14cyclictest30930-21grep08:55:250
3269999066,14cyclictest11192-21/usr/sbin/munin07:40:130
3269999062,18cyclictest30263-21date11:00:010
3269999056,20cyclictest5659-21runrttasks11:30:100
3269999055,20cyclictest6890-21/usr/sbin/munin11:35:170
3269999047,20cyclictest9128-21users07:30:280
3269998966,14cyclictest7845-21users07:25:290
3269998965,15cyclictest205-21cron11:50:010
3269998963,15cyclictest6032-21df_inode07:20:140
3269998961,15cyclictest13945-21basename09:55:250
3269998958,18cyclictest13657-21ntpq12:00:230
3269998955,20cyclictest19155-21ntp_states08:10:230
3269998954,22cyclictest31782-21/usr/sbin/munin09:00:110
3269998951,23cyclictest10952-21/usr/sbin/munin09:45:240
3269998866,14cyclictest1-21systemd12:35:010
3269998863,15cyclictest27243-21seq10:47:050
3269998862,15cyclictest276-21runrttasks09:36:580
3269998764,12cyclictest20292-21ntp_states10:20:210
3269998761,15cyclictest2315-21/usr/sbin/munin11:15:300
3269998753,22cyclictest19866-21systemctl10:20:000
3269998753,20cyclictest15934-21/usr/sbin/munin12:10:250
3269998663,13cyclictest9822-21latency09:40:170
3269998551,22cyclictest13696-21/usr/sbin/munin07:50:150
3269998456,16cyclictest5033-21runrttasks11:26:210
3269997952,16cyclictest3318-21wc07:10:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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