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2025-12-11 - 22:51

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 Thu Dec 11, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2512822500,3sleep025129-21systemctl08:00:260
1414722490,2sleep014149-21wc09:25:010
3025021930,2sleep030251-21switchtime10:25:290
1585221390,4chrt15849-21memory07:25:180
1590121200,2sleep015902-21cat11:35:320
816721050,4sleep08223-21users11:05:290
200942980,3sleep020095-21sshd09:46:080
297682920,3sleep029801-21latency_hist08:20:020
169612854,8sleep017002-21memory09:35:180
66502844,8sleep06696-21netstat08:55:230
233962794,62sleep023430-21netstat12:05:210
271502774,7sleep027166-21munin-run08:10:000
1063427721,33sleep010660-21memory07:05:170
127102633,5sleep00-21swapper09:19:190
11673996210,20cyclictest19841-21ntpq07:40:240
1167399619,19cyclictest10228-21munin-run09:10:000
1167399609,18cyclictest14376-21/usr/sbin/munin07:20:240
1167399609,15cyclictest32324-21/usr/sbin/munin10:35:150
11673996018,16cyclictest25333-21sshd12:12:290
1167399599,17cyclictest28524-21/usr/sbin/munin10:20:120
1167399599,16cyclictest18234-21/usr/sbin/munin07:35:180
11673995933,17cyclictest17015-21/usr/sbin/munin07:30:140
11673995933,15cyclictest28967-21/usr/sbin/munin12:25:320
11673995920,12cyclictest2894-21ntp_states08:40:260
11673995910,17cyclictest1285-21cat10:40:160
57172580,2sleep05718-21cat08:50:280
1167399589,17cyclictest14692-21runrttasks11:30:310
1167399589,16cyclictest29942-21ntp_states12:30:210
1167399589,15cyclictest23402-21/usr/sbin/munin07:55:260
11673995816,13cyclictest28251-21latency_hist12:25:020
29272570,3sleep02929-21grep10:45:280
1167399579,18cyclictest22157-21seq12:00:240
1167399579,16cyclictest5331-21awk10:55:230
1167399579,16cyclictest10636-21ntp_states09:10:230
1167399579,15cyclictest3950-21/usr/sbin/munin08:45:150
1167399578,16cyclictest31532-21chrt08:25:260
1167399578,16cyclictest17984-21/usr/sbin/munin11:45:170
1167399578,14cyclictest22120-21irqstats09:55:170
11673995731,16cyclictest13309-21/usr/sbin/munin07:15:210
11673995726,22cyclictest15806-21/usr/sbin/munin09:30:220
11673995711,18cyclictest108-21systemd-journal09:30:000
11673995710,18cyclictest6636-21ntp_states11:00:240
11673995710,17cyclictest20549-21/usr/sbin/munin11:55:180
11673995710,15cyclictest31671-21sshd12:36:300
11673995710,14cyclictest19614-21ps11:50:270
11673995710,13cyclictest22170-21df_inode07:50:140
1167399569,17cyclictest30905-21cron10:30:020
1167399569,16cyclictest26488-21sshd12:16:250
1167399569,16cyclictest10202-21/usr/sbin/munin11:15:410
1167399569,16cyclictest10075-21sh11:15:000
1167399568,17cyclictest11522-21/usr/sbin/munin11:20:110
1167399568,16cyclictest27369-21/usr/sbin/munin08:10:140
1167399568,16cyclictest20736-21seq09:50:110
1167399567,24cyclictest12861-21awk11:25:120
11673995634,14cyclictest7830-21/usr/sbin/munin09:00:140
11673995634,14cyclictest32622-21/usr/sbin/munin08:30:170
11673995632,15cyclictest1844-21/usr/sbin/munin08:35:300
11673995631,15cyclictest25993-21/usr/sbin/munin10:10:150
11673995611,15cyclictest21009-21/usr/sbin/munin07:45:180
1167399559,17cyclictest23291-21/usr/sbin/munin10:00:310
1167399559,15cyclictest11832-21df_inode07:10:130
1167399558,14cyclictest30425-21/usr/sbin/munin08:20:270
1167399557,16cyclictest28376-21date10:20:010
1167399556,16cyclictest24585-21/usr/sbin/munin10:05:170
11673995531,15cyclictest18206-21/usr/sbin/munin09:40:140
11673995428,17cyclictest4610-21runrttasks10:52:370
11673995329,16cyclictest16778-21/usr/sbin/munin11:40:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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