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2025-12-26 - 16:01

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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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 50 highest latencies:
System rack4slot6s.osadl.org (updated Fri Dec 26, 2025 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1351222750,4sleep013511-21wc10:20:260
3129422520,2sleep031297-21latency_hist09:25:010
2632022070,3sleep026318-21if_err_eth009:05:160
208321980,3sleep02081-21fgrep07:30:230
687921270,2sleep06882-21wc09:55:190
953221170,2sleep09531-21if_err_eth008:00:160
1370121170,2sleep013702-21expr08:15:270
1849321110,4chrt18491-21ls10:40:180
1854121040,3sleep018586-21/usr/sbin/munin08:35:160
1198421000,4sleep011988-21ntp_states12:20:230
39942990,4sleep03930-21/usr/sbin/munin11:50:170
314402990,4sleep031470-21ls07:20:020
289912980,4sleep029029-21netstat09:15:200
323942970,4sleep032480-21sed11:35:010
144522940,3sleep014493-21netstat12:30:200
167392920,4sleep016788-21ls12:40:020
223602890,2sleep022364-21cpu08:50:110
224152825,8sleep022445-21ntpq10:55:200
2879227717,14sleep00-21swapper07:09:450
28873996830,28cyclictest446-21/usr/sbin/munin07:25:120
28873996636,22cyclictest18292-21latency_hist10:40:020
28873996611,17cyclictest12029-21memory10:15:200
147892640,2sleep014790-21latency08:20:180
28873996130,21cyclictest4708-21/usr/sbin/munin09:45:290
2887399608,18cyclictest5208-21/usr/sbin/munin11:55:150
2887399599,17cyclictest26099-21idleruntime-cro09:05:010
2887399599,17cyclictest10112-21sshd10:07:270
2887399598,17cyclictest23476-21/usr/sbin/munin11:00:210
28873995937,14cyclictest23933-21/usr/sbin/munin08:55:240
28873995933,16cyclictest1545-21/usr/sbin/munin11:40:200
2887399589,20cyclictest2702-21chrt09:40:010
2887399589,17cyclictest8125-21/usr/sbin/munin07:55:210
2887399588,18cyclictest12982-21/usr/sbin/munin12:25:260
2887399588,17cyclictest17175-21/usr/sbin/munin08:30:290
2887399588,17cyclictest10424-21/usr/sbin/munin12:15:100
2887399588,16cyclictest9092-21/usr/sbin/munin12:10:260
28873995834,15cyclictest8321-21/usr/sbin/munin12:05:270
28873995810,14cyclictest12007-21/usr/sbin/munin08:10:240
2887399578,17cyclictest19772-21/usr/sbin/munin08:40:220
2887399578,16cyclictest4138-21systemctl07:40:000
2887399577,19cyclictest32686-21/usr/sbin/munin09:30:190
28873995734,15cyclictest10805-21/usr/sbin/munin08:05:140
28873995731,16cyclictest32748-21latency_hist07:25:010
28873995730,17cyclictest30027-21/usr/sbin/munin11:25:160
28873995710,15cyclictest6704-21memory12:00:170
2887399569,18cyclictest14690-21ntpq10:25:190
2887399568,17cyclictest10772-21ls10:10:190
2887399568,14cyclictest15895-21/usr/sbin/munin08:25:130
2887399566,14cyclictest20881-21/usr/sbin/munin10:50:200
28873995632,15cyclictest4672-21/usr/sbin/munin07:40:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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