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2026-10-20 - 00:46

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 here to display the system's profile data or here to proceed to next system.
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 all highest latencies:
System rack4slot6s.osadl.org (updated Mon Oct 19, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
289921300,4chrt2894-21munin-run08:15:000
661821260,2sleep06617-21sort10:35:000
2529221240,4chrt24812-21/usr/sbin/munin11:45:260
161621200,3chrt1617-21missed_timers12:20:190
445121140,4sleep04452-21ntp_states10:25:250
1615221100,3chrt16151-21processes11:10:240
1486921100,3chrt14866-21grep09:00:210
2417621060,2sleep024178-21ls09:35:270
2036621030,3sleep020365-21cat09:20:270
512221010,4sleep05159-21cat12:35:010
968421000,5sleep09743-21ntpq08:40:190
2152821000,2sleep021525-21grep09:25:260
1644021000,3sleep016518-21timerwakeupswit09:05:280
252282950,3sleep025272-21if_eth007:35:140
188182920,4sleep018836-21/usr/sbin/munin09:15:250
18602999159,20cyclictest27712-21irqstats09:50:180
18602998758,17cyclictest30035-21df_inode12:05:140
18602998658,19cyclictest25314-21/usr/sbin/munin09:40:230
18602998560,15cyclictest6907-21memory10:35:180
18602998559,15cyclictest31526-21awk10:05:130
18602998458,15cyclictest11593-21chrt08:47:130
18602998457,17cyclictest21477-21cat07:20:180
18602998457,15cyclictest22575-21cat09:30:170
18602998452,22cyclictest30488-21sshd10:00:240
18602998355,16cyclictest13112-21seq08:54:140
18602998256,15cyclictest27233-21chrt07:41:490
18602998255,15cyclictest27290-21runrttasks09:48:500
18602998255,14cyclictest23420-21chrt07:27:210
18602998254,17cyclictest28672-21seq07:48:100
18602998254,15cyclictest6019-21find08:25:260
18602998159,13cyclictest2933-21/usr/sbin/munin10:20:130
18602998157,14cyclictest8498-21seq08:35:230
18602998157,14cyclictest815-21/usr/sbin/munin10:10:280
18602998154,16cyclictest15706-21latency_hist11:10:020
18602998153,17cyclictest23653-21cat11:40:140
18602998055,15cyclictest18645-21date07:10:010
18602998054,15cyclictest28685-21/usr/sbin/munin12:00:290
18602998054,14cyclictest7496-21users08:30:300
18602998054,14cyclictest29855-21chrt09:58:490
18602998053,16cyclictest26533-21/usr/sbin/munin11:50:260
18602998051,18cyclictest31671-21egrep08:00:130
18602998050,17cyclictest877-21grep08:05:260
18602997957,13cyclictest5394-21irqstats12:35:180
18602997954,15cyclictest20980-21chrt07:18:370
18602997953,16cyclictest20935-21/usr/sbin/munin11:30:140
18602997953,15cyclictest27661-21ntpq11:55:220
18602997952,14cyclictest22299-21/usr/sbin/munin11:35:130
18602997949,18cyclictest18542-21latency11:20:180
18602997854,15cyclictest10879-21/usr/sbin/munin10:50:190
18602997851,17cyclictest11882-21grep10:55:100
18602997851,16cyclictest19173-21swap07:10:260
18602997844,20cyclictest13876-21/usr/sbin/munin08:55:280
18602997752,14cyclictest19711-21df11:25:130
18602997752,14cyclictest1840-21ntp_states10:15:220
18602997751,18cyclictest5163-21runrttasks08:22:190
18602997750,15cyclictest17665-21chrt09:10:260
18602997652,14cyclictest363-21ntp_states12:15:220
18602997651,14cyclictest32504-21latency_hist12:15:010
18602997650,15cyclictest29592-21wc07:50:290
18602997644,18cyclictest17169-21if_eth011:15:140
18602997554,12cyclictest3407-21runrttasks12:26:260
18602997551,15cyclictest24981-21runrttasks07:34:420
18602997550,15cyclictest8547-21threads10:40:260
18602997548,16cyclictest30369-21df_inode07:55:140
18602997548,14cyclictest13483-21ntp_states11:00:220
18602997450,13cyclictest3077-21df_inode08:15:140
18602997443,19cyclictest9313-21/usr/sbin/munin10:45:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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