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2025-08-26 - 16:33

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 Aug 26, 2025 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
341322460,3sleep03411-21cat11:40:030
213821420,3chrt2137-21munin-run09:30:010
2940821240,2sleep029411-21idleruntime-cro09:10:010
373921220,3sleep03743-21tr11:40:200
144121090,4sleep01112-21/usr/sbin/munin07:20:290
760721050,3sleep07605-21ntp_states11:55:220
1942921030,3sleep019462-21awk08:30:210
500021000,3sleep05041-21memory09:40:190
293162920,5sleep029352-21latency_hist11:15:020
208832900,4sleep020940-21grep08:35:270
231462890,2sleep023148-21sed10:50:180
125932880,2sleep012595-21modprobe08:04:590
60922794,8sleep06096-21df_inode11:50:130
2966427719,33sleep029711-21grep07:05:150
117342763,62sleep011803-21uptime12:10:330
324512754,61sleep032494-21ps09:20:260
143092743,60sleep014327-21awk08:10:250
30864997332,28cyclictest2908-21/usr/sbin/munin07:25:280
205012630,2sleep020500-21idleruntime10:40:150
30864996031,18cyclictest6209-21/usr/sbin/munin09:45:140
3086499599,18cyclictest19111-21/usr/sbin/munin10:35:250
3086499599,17cyclictest17952-21egrep08:25:110
30864995910,16cyclictest21966-21load08:40:180
3086499589,22cyclictest22189-21snmpd07:46:320
3086499589,18cyclictest7511-21cat07:45:020
3086499588,17cyclictest23069-21/usr/sbin/munin08:45:130
3086499588,17cyclictest11436-21/usr/sbin/munin10:05:150
3086499588,15cyclictest9973-21grep12:05:120
30864995833,17cyclictest18670-21runrttasks10:32:310
30864995811,15cyclictest13199-21/usr/sbin/munin08:05:300
30864995810,18cyclictest31023-21df_inode07:10:140
30864995810,16cyclictest8770-21df_inode09:55:160
30864995810,15cyclictest12495-21/usr/sbin/munin12:15:110
3086499579,16cyclictest5090-21/usr/sbin/munin11:45:300
3086499579,15cyclictest7608-21memory09:50:180
3086499578,15cyclictest3681-21irqstats09:35:170
3086499578,14cyclictest10123-21/usr/sbin/munin07:55:260
3086499577,17cyclictest26954-21/usr/sbin/munin09:00:310
30864995734,14cyclictest13999-21/usr/sbin/munin12:20:200
30864995725,13cyclictest376-21uptime07:15:320
30864995720,14cyclictest18961-21latency_hist12:40:030
30864995711,18cyclictest5256-21ntpq07:35:250
30864995711,18cyclictest24652-21ntp_states08:50:250
3086499569,17cyclictest26871-21/usr/sbin/munin11:05:190
3086499569,14cyclictest1-21systemd10:20:260
3086499568,21cyclictest15690-21users12:25:280
3086499568,16cyclictest29449-21grep11:15:120
3086499568,14cyclictest10020-21/usr/sbin/munin10:00:300
3086499567,15cyclictest13928-21/usr/sbin/munin10:15:310
3086499566,17cyclictest16590-21seq10:25:140
30864995623,23cyclictest25805-21latency08:55:180
30864995612,16cyclictest15360-21df_inode08:15:170
30864995610,14cyclictest25777-21memory11:00:230
3086499559,17cyclictest30810-21df11:20:130
3086499559,15cyclictest12753-21if_eth010:10:170
3086499559,14cyclictest29754-21wc09:10:220
3086499558,15cyclictest24270-21/usr/sbin/munin10:55:170
3086499558,15cyclictest2379-21if_eth009:30:200
3086499557,16cyclictest32745-21sshd11:26:150
30864995532,15cyclictest4225-21/usr/sbin/munin07:30:280
30864995532,15cyclictest16584-21/usr/sbin/munin12:30:240
30864995527,16cyclictest8718-21/usr/sbin/munin12:00:150
30864995527,16cyclictest1101-21/usr/sbin/munin11:30:210
3086499549,17cyclictest21746-21egrep10:45:130
30864995410,16cyclictest9450-21seq07:50:300
30864995410,16cyclictest16880-21ntpq08:20:190
3086499538,16cyclictest31120-21ntp_states09:15:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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