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2026-06-14 - 13:00

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 the 100 highest latencies:
System rack4slot6s.osadl.org (updated Sun Jun 14, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1848022260,2sleep018482-21timerandwakeup23:30:270
2333521330,2sleep023337-21basename19:40:010
1313221170,3chrt13130-21cat21:05:190
281121160,4chrt2812-21timerandwakeup00:35:280
1303021160,2sleep013033-21ntp_kernel_err23:10:170
3165321110,4chrt31654-21mailstats20:10:260
2885721100,3sleep028856-21sed00:10:310
2764121040,4sleep027713-21/usr/sbin/munin19:55:250
2606021040,3sleep026115-21awk21:55:220
2373021000,4sleep023758-21/usr/sbin/munin19:40:200
120902990,4sleep012092-21users23:05:290
323832980,4sleep032380-21cat00:25:180
266832920,3sleep026684-21sshd00:03:310
160392920,3sleep016107-21ps19:10:250
275932916,10sleep027594-21users00:05:300
83462885,10sleep08347-21sshd22:51:320
261112850,4sleep026150-21cat19:50:160
244562855,9sleep024462-21df_inode23:55:140
181382810,4sleep018183-21cpu21:25:110
5382790,3sleep0536-21threads20:15:270
290692790,3sleep029067-21grep20:00:240
13592795,62sleep01363-21memory22:25:180
1449827318,32sleep014554-21irqstats19:05:140
212642724,56sleep021293-21users21:35:270
15613996710,16cyclictest3189-21sshd22:31:320
15613996533,23cyclictest19811-21/usr/sbin/munin21:30:240
1561399627,15cyclictest24283-21modprobe23:55:000
15613996111,17cyclictest5313-21ntpq22:40:210
1561399607,17cyclictest1-21systemd19:25:250
15613996036,16cyclictest28520-21/usr/sbin/munin22:05:120
15613996017,17cyclictest25781-21latency_hist21:55:010
1561399599,18cyclictest31033-21/usr/sbin/munin22:15:170
1561399599,16cyclictest2822-21memory20:25:180
15613995935,15cyclictest22530-21/usr/sbin/munin21:40:260
15613995933,17cyclictest4431-21/usr/sbin/munin20:30:270
15613995933,16cyclictest30060-21/usr/sbin/munin00:15:270
15613995932,18cyclictest1404-21/usr/sbin/munin20:20:130
15613995919,13cyclictest15386-21/usr/sbin/munin23:20:310
15613995911,17cyclictest20730-21/usr/sbin/munin23:40:170
15613995910,15cyclictest19323-21awk23:35:160
1561399588,17cyclictest11670-21/usr/sbin/munin21:00:200
1561399588,16cyclictest10291-21/usr/sbin/munin23:00:140
1561399588,15cyclictest14065-21/usr/sbin/munin23:15:120
15613995836,14cyclictest17078-21/usr/sbin/munin19:15:130
15613995835,15cyclictest7855-21runrttasks20:45:130
15613995834,16cyclictest9948-21runrttasks20:52:420
15613995834,16cyclictest18880-21/usr/sbin/munin19:20:270
15613995810,16cyclictest4032-21ntpq22:35:220
1561399579,16cyclictest15538-21/usr/sbin/munin21:15:120
1561399579,16cyclictest14253-21/usr/sbin/munin21:10:170
1561399578,15cyclictest5451-21ntpq20:35:190
15613995734,15cyclictest17375-21/usr/sbin/munin21:20:270
15613995732,16cyclictest29874-21/usr/sbin/munin22:10:130
15613995711,17cyclictest1273-21ntp_states00:30:200
1561399568,15cyclictest16673-21/usr/sbin/munin23:25:240
15613995632,15cyclictest6569-21/usr/sbin/munin20:40:140
15613995631,16cyclictest27692-21/usr/sbin/munin22:00:290
1561399559,17cyclictest32497-21irqstats22:20:170
1561399558,15cyclictest24902-21irqstats19:45:180
1561399557,16cyclictest6334-21/usr/sbin/munin22:45:270
15613995534,13cyclictest30420-21/usr/sbin/munin20:05:280
15613995530,15cyclictest9042-21/usr/sbin/munin22:55:150
15613995530,15cyclictest11227-21runrttasks20:57:410
1561399549,15cyclictest30888-21/usr/sbin/munin00:20:180
1561399549,14cyclictest23591-21ntp_states21:45:230
15613995431,14cyclictest22233-21/usr/sbin/munin23:45:260
15613995210,15cyclictest21622-21seq19:31:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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