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2026-06-17 - 20:04

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 Wed Jun 17, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2214222890,3sleep022143-21mailstats07:45:250
493722650,3sleep04936-21wc10:50:250
2397022550,2sleep023971-21wc12:05:100
2065922470,3sleep020661-21missed_timers07:40:180
3080522140,2sleep030804-21sort10:25:200
405822040,2sleep04059-21cat08:41:040
1926821210,3chrt19266-21ntp_states09:40:180
1448521210,3chrt14484-21/usr/sbin/munin07:15:270
2972021190,3sleep029722-21grep08:15:200
2553721150,3sleep025541-21ntp_states12:10:220
2319821110,3chrt23196-21memory07:50:170
1648021030,3sleep016476-21cat07:25:010
66332990,3sleep06641-21vmstat08:50:290
194282960,3sleep019429-21sh07:35:240
24892950,3sleep02538-21ls10:40:250
186622950,3sleep018674-21latency_hist11:45:010
116062870,3chrt11603-21cat11:15:270
296722820,3sleep029671-21wc12:25:270
282592750,2sleep028305-21cat08:10:170
279342733,5sleep00-21swapper08:09:090
269142730,3sleep026912-21grep10:10:170
267282720,3sleep026730-21missed_timers12:15:190
1168227220,30sleep011687-21ntp_states07:05:260
209872707,12sleep0129-21systemd-udevd11:53:010
12585996435,17cyclictest7802-21/usr/sbin/munin08:55:250
12585996420,15cyclictest16845-21ntpq07:25:200
12585996320,15cyclictest1-21systemd11:40:010
12585996123,14cyclictest13636-21runrttasks09:19:470
1258599607,17cyclictest9749-21/usr/sbin/munin11:10:170
291102593,8sleep00-21swapper10:19:370
1258599598,22cyclictest114-21systemd-journal11:30:000
12585995936,15cyclictest3438-21/usr/sbin/munin10:45:150
12585995934,16cyclictest9415-21runrttasks11:08:200
12585995913,17cyclictest15360-21ntpq09:25:180
12585995911,14cyclictest18846-21awk09:40:000
1258599589,15cyclictest288-21snmpd09:33:430
1258599588,18cyclictest25788-21runrttasks08:00:170
1258599588,17cyclictest2752-21/usr/sbin/munin08:35:270
1258599587,17cyclictest10441-21awk09:05:270
1258599587,15cyclictest316122sleep008:22:240
12585995835,14cyclictest32072-21/usr/sbin/munin10:30:170
12585995833,16cyclictest30498-21/usr/sbin/munin12:30:120
12585995832,16cyclictest11731-21/usr/sbin/munin09:10:270
12585995815,13cyclictest5859-21/usr/sbin/munin10:55:130
12585995810,16cyclictest21425-21df_inode11:55:140
1258599578,18cyclictest25435-21/usr/sbin/munin10:05:160
1258599578,17cyclictest13826-21/usr/sbin/munin09:20:300
1258599577,17cyclictest22672-21/usr/sbin/munin12:00:190
1258599577,16cyclictest12347-21/usr/sbin/munin11:20:180
12585995732,16cyclictest765-21/usr/sbin/munin10:35:150
12585995710,18cyclictest17850-21/usr/sbin/munin07:30:290
12585995710,16cyclictest12825-21irqstats07:10:170
1258599568,17cyclictest1021-21sshd08:30:160
1258599568,16cyclictest8900-21ntpq09:00:210
1258599568,16cyclictest28153-21/usr/sbin/munin12:20:240
1258599567,17cyclictest14921-21/usr/sbin/munin11:30:180
12585995632,16cyclictest19063-21/usr/sbin/munin11:45:180
12585995632,15cyclictest5038-21/usr/sbin/munin08:45:240
12585995631,15cyclictest7178-21/usr/sbin/munin11:00:120
12585995629,17cyclictest31779-21/usr/sbin/munin12:35:150
12585995611,15cyclictest21845-21ntp_states09:50:230
12585995611,14cyclictest20411-21irqstats09:45:170
12585995610,17cyclictest29424-21if_err_eth010:20:150
1258599557,17cyclictest32155-21sshd08:25:160
1258599557,16cyclictest22829-21munin-node09:55:090
1258599549,14cyclictest24498-21missed_timers07:55:180
1258599548,14cyclictest24437-21ntp_states10:00:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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