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2025-12-01 - 21:42

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 Mon Dec 01, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3134222600,3sleep031341-21timerandwakeup11:40:300
2372022430,2sleep023721-21cat09:05:310
3005322080,3sleep030054-21find09:30:250
361921550,2sleep03621-21latency_hist07:50:010
1801621380,4chrt18015-21awk08:45:150
3123221310,3chrt31227-21ntp_states09:35:230
2233621110,4sleep021838-21/usr/sbin/munin09:00:270
122102930,4sleep012211-21sshd10:27:030
42002830,3sleep04202-21sed09:55:280
2455727619,32sleep024607-21df07:05:130
6702733,5sleep00-21swapper09:42:480
25757996629,25cyclictest21966-21/usr/sbin/munin11:05:190
2575799649,19cyclictest27307-21ntpq09:20:210
2575799638,19cyclictest27136-21/usr/sbin/munin07:15:150
49462610,2sleep04947-21cat07:55:000
25757996130,22cyclictest6394-21ntp_states12:10:230
25757996129,22cyclictest8022-21/usr/sbin/munin10:10:270
25757996110,19cyclictest13534-21sshd08:26:360
2575799608,16cyclictest193022sleep008:50:130
25757996023,12cyclictest9969-21cron10:20:000
2575799599,20cyclictest22189-21snmpd11:29:550
2575799599,18cyclictest25647-21/usr/sbin/munin11:20:110
2575799599,16cyclictest14280-21ntp_states10:35:240
2575799599,15cyclictest20526-21/usr/sbin/munin08:55:310
2575799598,19cyclictest4950-21/usr/sbin/munin10:00:250
25757995932,16cyclictest12765-21/usr/sbin/munin12:35:200
25757995912,21cyclictest31026-21/usr/sbin/munin07:30:180
25757995910,16cyclictest1448-21runrttasks07:40:210
2575799588,16cyclictest28457-21/usr/sbin/munin07:20:310
2575799587,17cyclictest6017-21latency_hist12:10:010
25757995834,15cyclictest1450-21/usr/sbin/munin11:50:310
25757995833,15cyclictest16669-21/usr/sbin/munin10:45:160
25757995833,14cyclictest9090-21/usr/sbin/munin08:10:180
25757995812,16cyclictest5302-21ntp_states07:55:250
25757995810,18cyclictest10276-21ntp_states12:25:230
25757995810,17cyclictest8566-21munin-run12:20:000
25757995810,15cyclictest14222-21/usr/sbin/munin08:30:170
2575799579,18cyclictest6913-21users08:00:270
2575799579,18cyclictest25856-21/usr/sbin/munin07:10:140
2575799579,18cyclictest11590-21/usr/sbin/munin12:30:250
2575799579,15cyclictest32371-21sshd07:35:130
2575799578,15cyclictest24331-21/usr/sbin/munin11:15:260
2575799577,15cyclictest15306-21/usr/sbin/munin10:40:360
25757995733,15cyclictest13300-21/usr/sbin/munin10:30:320
25757995731,16cyclictest10541-21/usr/sbin/munin10:20:260
25757995730,17cyclictest20982-21/usr/sbin/munin11:00:290
25757995714,16cyclictest15958-21sshd08:35:340
25757995710,16cyclictest30020-21/usr/sbin/munin11:35:270
2575799569,15cyclictest3520-21/usr/sbin/munin12:00:190
2575799569,15cyclictest29744-21/usr/sbin/munin07:25:290
2575799569,15cyclictest23045-21/usr/sbin/munin11:10:300
2575799569,14cyclictest11507-21/usr/sbin/munin08:20:190
2575799569,13cyclictest6247-21/usr/sbin/munin10:05:140
2575799567,16cyclictest1073-21/usr/sbin/munin09:45:270
2575799567,15cyclictest7624-21/usr/sbin/munin08:05:250
2575799567,15cyclictest17872-21/usr/sbin/munin10:50:110
25757995633,15cyclictest28667-21/usr/sbin/munin11:30:280
25757995631,15cyclictest25793-21/usr/sbin/munin09:15:150
2575799558,17cyclictest24730-21chrt09:10:240
2575799558,16cyclictest16671-21munin-node08:40:100
2575799558,15cyclictest2208-21/usr/sbin/munin11:55:310
25757995531,15cyclictest10778-21/usr/sbin/munin08:15:300
25757995530,16cyclictest2500-21irqstats09:50:170
25757995518,13cyclictest32238-21interrupts11:45:170
25757995511,18cyclictest28373-21df09:25:120
2575799548,14cyclictest22189-21snmpd10:59:340
25757995414,13cyclictest22189-21snmpd12:20:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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