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2026-09-07 - 12:02

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 50 highest latencies:
System rack4slot6s.osadl.org (updated Mon Sep 07, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2201022470,3sleep022009-21wc20:25:250
2674122410,3sleep026745-21latency22:50:200
1405421400,3sleep014052-21cat19:55:190
691421280,4chrt6915-21run-parts23:40:000
1950621270,3sleep019508-21grep20:15:270
877821210,2sleep08780-21awk21:40:210
2792421210,4chrt27925-21latency_hist20:50:000
2024021170,3chrt20243-21if_err_eth022:25:150
1788021140,2sleep017882-21latency20:10:180
2910721120,3sleep029104-21cat23:00:010
985821010,2sleep09859-21modprobe19:40:000
2804921010,4sleep028099-21df20:50:130
200712990,3sleep020112-21if_eth000:30:150
51662987,12sleep05235-21/usr/sbin/munin21:25:280
186952940,4sleep018726-21readlink22:20:000
189022920,5sleep018930-21cat00:25:190
46682850,3sleep04702-21sendmail19:20:010
35742840,2sleep03577-21sed21:20:180
224732847,62sleep022551-21grep00:40:020
64122810,2sleep06413-21ntp_states19:25:230
126462817,62sleep012697-21irqstats19:50:160
111382760,3sleep011198-21grep23:55:210
99027520,30sleep0997-21/usr/sbin/munin19:05:150
138192716,55sleep013832-21ntp_states00:05:230
116732710,2sleep011676-21sort21:50:320
99802700,3sleep010039-21processes23:50:260
2130996235,16cyclictest17677-21/usr/sbin/munin00:20:200
2130996232,21cyclictest22872-21/usr/sbin/munin22:35:180
213099617,19cyclictest4722-21ntpq23:30:200
213099609,19cyclictest29459-21/usr/sbin/munin23:00:220
2130996036,15cyclictest32195-21/usr/sbin/munin21:05:200
213099599,17cyclictest10097-21ntp_states21:45:230
213099599,15cyclictest20330-21/usr/sbin/munin20:20:160
2130995934,16cyclictest7509-21/usr/sbin/munin23:40:250
2130995911,15cyclictest8429-21/usr/sbin/munin23:45:110
213099589,17cyclictest2568-21grep21:15:280
213099588,20cyclictest30467-21/usr/sbin/munin23:05:180
2130995834,15cyclictest7550-21/usr/sbin/munin19:30:190
2130995820,15cyclictest167512chrt00:15:460
2130995810,16cyclictest25668-21load20:40:170
2130995810,15cyclictest1750-21munin-run23:20:010
213099579,16cyclictest12260-21/usr/sbin/munin00:00:130
213099578,16cyclictest15120-21uname22:05:170
2130995732,16cyclictest22501-21runrttasks22:34:240
2130995732,15cyclictest14956-21/usr/sbin/munin00:10:160
2130995731,15cyclictest7346-21/usr/sbin/munin21:35:160
2130995722,14cyclictest11173-21latency_hist19:45:010
2130995719,14cyclictest162022chrt20:04:090
2130995711,13cyclictest17414-21latency_hist22:15:000
2130995710,15cyclictest6089-21/usr/sbin/munin21:30:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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