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2026-05-17 - 21:58

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 May 17, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1728522560,2sleep017286-21awk10:25:270
2864722550,3sleep028645-21df09:05:120
50122540,2sleep0502-21sshd11:25:580
1698622350,2sleep016987-21egrep08:20:110
2378722180,3sleep023784-21cat10:50:260
3003021240,2sleep030029-21pluginstate11:15:250
3131921200,4chrt31317-21ntp_states11:20:230
2957721200,3chrt29576-21munin-plugin-st11:15:000
279221190,3chrt2776-21cpu07:25:110
2780821160,3sleep027805-21cat09:00:300
1063921110,3sleep010643-21ntp_states10:00:240
251221100,3chrt2510-21sshd07:23:570
554921040,3sleep05551-21missed_timers07:35:180
210922990,3sleep021091-21wc10:40:270
90732980,3sleep08879-21/usr/sbin/munin12:00:200
323762980,4sleep032421-21latency_hist09:20:020
63382940,3sleep06370-21latency_hist09:45:010
205702940,3sleep020538-21latency_hist10:40:020
152042898,66sleep015219-21munin-run12:25:020
113512790,2sleep011353-21latency_hist12:10:010
3119927720,32sleep031223-21munin-run07:10:000
68682755,58sleep06919-21mailstats09:45:260
30832700,3sleep03086-21sort09:30:260
31247996932,27cyclictest6358-21/usr/sbin/munin11:50:140
3124799606,21cyclictest13099-21/usr/sbin/munin08:05:120
3124799599,14cyclictest12734-21/usr/sbin/munin12:15:270
3124799598,17cyclictest16573-21sshd08:17:570
31247995934,16cyclictest30350-21/usr/sbin/munin09:10:250
31247995934,16cyclictest1257-21/usr/sbin/munin11:30:150
31247995924,13cyclictest16885-21ntp_kernel_pll_12:30:190
31247995910,16cyclictest1311-21/usr/sbin/munin09:25:130
3124799589,19cyclictest19692-21irqstats08:30:160
3124799589,15cyclictest7943-21memory09:50:180
3124799588,17cyclictest31750-21/usr/sbin/munin07:10:260
3124799588,16cyclictest4055-21/usr/sbin/munin07:30:140
31247995835,15cyclictest32747-21/usr/sbin/munin09:20:190
31247995834,15cyclictest24037-21runrttasks08:45:310
31247995834,15cyclictest15392-21/usr/sbin/munin12:25:120
31247995833,16cyclictest26050-21/usr/sbin/munin11:00:190
31247995832,17cyclictest24895-21/usr/sbin/munin08:50:160
31247995832,16cyclictest11862-21/usr/sbin/munin12:10:250
31247995826,22cyclictest13226-21runrttasks10:10:260
31247995810,16cyclictest6704-21df07:40:140
31247995810,15cyclictest7934-21/usr/sbin/munin07:45:280
3124799579,15cyclictest7565-21/usr/sbin/munin11:55:180
31247995734,15cyclictest18345-21/usr/sbin/munin10:30:190
3124799569,15cyclictest22017-21df10:45:120
3124799568,15cyclictest24534-21/usr/sbin/munin10:55:150
3124799567,16cyclictest9039-21/usr/sbin/munin09:55:290
3124799567,16cyclictest22004-21munin-run08:40:000
31247995632,16cyclictest12828-21runrttasks08:03:530
31247995632,15cyclictest14608-21/usr/sbin/munin08:10:200
31247995631,15cyclictest18475-21/usr/sbin/munin08:25:190
31247995630,17cyclictest11314-21runrttasks07:57:150
3124799558,18cyclictest4023-21irqstats09:35:170
3124799558,17cyclictest3903-21load11:40:170
3124799558,14cyclictest5002-21/usr/sbin/munin11:45:260
3124799557,14cyclictest119252sleep010:05:210
3124799556,15cyclictest25994-21/usr/sbin/munin08:55:140
31247995530,16cyclictest17953-21runrttasks12:35:110
31247995530,15cyclictest22435-21runrttasks08:40:210
31247995529,16cyclictest14278-21/usr/sbin/munin10:15:140
31247995524,24cyclictest2658-21runrttasks11:35:200
31247995510,17cyclictest15806-21ntpq10:20:210
3124799549,14cyclictest32637-21egrep07:15:120
31247995431,15cyclictest27723-21/usr/sbin/munin11:05:290
31247995431,14cyclictest10011-21runrttasks07:52:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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