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2025-07-13 - 11:48

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 Sun Jul 13, 2025 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2744721510,5chrt27446-21/usr/sbin/munin23:10:150
2023421360,4chrt20232-21users22:40:290
825921300,3chrt8256-21ntp_states21:55:270
1373921170,3chrt13737-21grep20:10:290
309121070,2sleep03093-21awk23:40:280
1456021010,5sleep014597-21cat22:20:180
19632870,2sleep01964-21/usr/sbin/munin23:35:320
174902830,4sleep017536-21proc_pri20:25:260
2926927823,32sleep029270-21ntp_states19:05:250
142882690,3sleep014289-21egrep00:25:110
68532650,2sleep06852-21open_inodes23:55:270
30174996417,16cyclictest31861-21ntpq19:15:270
30174996237,16cyclictest4481-21/usr/sbin/munin23:45:320
30174996237,14cyclictest641-21/usr/sbin/munin21:25:270
30174996110,16cyclictest15772-21/usr/sbin/munin22:25:350
3017499598,17cyclictest29973-21/usr/sbin/munin23:20:210
30174995922,13cyclictest27247-21latency_hist23:10:010
30174995910,20cyclictest6015-21mailstats19:40:300
30174995910,18cyclictest32608-21df_inode23:30:160
30174995910,17cyclictest12315-21ntp_states20:05:260
3017499589,17cyclictest28655-21/usr/sbin/munin23:15:290
3017499589,16cyclictest25212-21mailstats23:00:280
3017499588,16cyclictest17059-21/usr/sbin/munin22:30:220
3017499588,15cyclictest324-21munin-node21:15:110
30174995816,12cyclictest25266-21snmpd19:25:160
30174995813,28cyclictest11877-21memory00:15:200
30174995811,16cyclictest5534-21irqstats21:45:180
30174995810,18cyclictest10919-21/usr/sbin/munin22:05:280
30174995810,16cyclictest1702-21memory21:30:180
3017499579,20cyclictest20310-21wc20:35:290
3017499579,16cyclictest4112-21/usr/sbin/munin21:40:190
3017499579,14cyclictest6855-21/usr/sbin/munin19:45:160
3017499579,14cyclictest22213-21/usr/sbin/munin22:50:230
3017499578,18cyclictest13168-21/usr/sbin/munin22:15:350
3017499578,16cyclictest22466-21if_eth020:45:160
3017499578,16cyclictest13011-21/usr/sbin/munin00:20:190
3017499578,16cyclictest10658-21ntpq00:10:210
30174995734,14cyclictest16035-21/usr/sbin/munin20:20:160
30174995733,15cyclictest8846-21runrttasks19:51:230
30174995732,15cyclictest3077-21/usr/sbin/munin19:30:160
30174995732,15cyclictest14846-21/usr/sbin/munin20:15:230
30174995731,15cyclictest15985-21/usr/sbin/munin00:30:290
30174995711,18cyclictest26083-21awk21:00:000
30174995710,15cyclictest26368-21seq21:00:190
3017499569,15cyclictest4265-21/usr/sbin/munin19:35:300
3017499569,15cyclictest21217-21ntp_states22:45:240
3017499569,13cyclictest12707-21seq22:12:200
3017499568,15cyclictest28805-21/usr/sbin/munin21:10:290
3017499568,14cyclictest21066-21/usr/sbin/munin20:40:160
3017499568,13cyclictest31265-21/usr/sbin/munin23:25:270
3017499567,17cyclictest7888-21seq00:00:130
30174995632,14cyclictest24178-21/usr/sbin/munin20:50:290
30174995632,14cyclictest23575-21/usr/sbin/munin22:55:170
30174995631,16cyclictest10164-21runrttasks19:56:400
30174995629,15cyclictest31497-21/usr/sbin/munin21:20:160
30174995610,16cyclictest30427-21uname19:10:190
3017499559,13cyclictest6821-21/usr/sbin/munin21:50:200
3017499558,15cyclictest16856-21/usr/sbin/munin00:35:190
3017499558,13cyclictest18736-21ntpq20:30:220
3017499556,18cyclictest9271-21/usr/sbin/munin22:00:180
30174995518,12cyclictest5469-21netstat23:50:210
30174995511,13cyclictest108-21systemd-journal19:20:330
3017499549,17cyclictest18630-21ntpq22:35:260
3017499548,15cyclictest2803-21chrt21:35:130
3017499548,14cyclictest27516-21/usr/sbin/munin21:05:140
30174995424,20cyclictest9249-21if_eth000:05:190
30174995310,15cyclictest10925-21/usr/sbin/munin20:00:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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