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2026-03-13 - 22:56

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 Fri Mar 13, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1708022700,3sleep017079-21cat07:25:260
2394221870,2sleep023944-21cron12:05:000
2944321490,4sleep029494-21latency_hist08:15:020
2815421430,2sleep028155-21modprobe08:10:000
2839221280,3chrt28389-21ntp_states10:15:210
866821160,3chrt8589-21latency_hist09:00:020
485921030,3sleep04910-21/usr/sbin/munin08:45:120
111892990,3sleep011230-21latency_hist09:10:010
49642920,4sleep04970-21ntpq10:50:210
6832910,5sleep0673-21latency_hist10:35:010
193692900,3sleep019394-21latency07:35:160
101662905,10sleep010233-21processes11:10:250
267022890,3sleep026780-21grep10:10:020
220802895,9sleep022105-21ntp_states07:45:200
297442860,3sleep029761-21/usr/sbin/munin08:15:180
272602865,67sleep027327-21threads10:10:250
318622850,3sleep031903-21latency_hist10:30:010
24822825,65sleep02525-21ntpq08:35:180
293812765,61sleep029422-21memory12:25:180
1262727420,30sleep012652-21munin-run07:10:020
44952723,6sleep00-21swapper08:43:080
164452725,57sleep016446-21sshd07:24:200
251052713,5sleep00-21swapper07:56:250
12678996430,23cyclictest14330-21/usr/sbin/munin09:20:250
12678996230,21cyclictest1037-21/usr/sbin/munin08:30:110
1267899609,17cyclictest17766-21/usr/sbin/munin09:35:180
12678996021,13cyclictest13096-21open_inodes07:10:230
12678996010,17cyclictest6138-21/usr/sbin/munin08:50:240
1267899599,15cyclictest15020-21/usr/sbin/munin11:30:130
1267899598,17cyclictest21130-21/usr/sbin/munin07:40:280
1267899589,16cyclictest32157-21/usr/sbin/munin08:25:180
1267899589,15cyclictest30871-21/usr/sbin/munin08:20:250
1267899588,17cyclictest25696-21/usr/sbin/munin08:00:250
12678995834,16cyclictest18985-21/usr/sbin/munin11:45:170
12678995810,15cyclictest16590-21ntp_states11:35:200
1267899579,16cyclictest25938-21users12:10:270
1267899579,15cyclictest29594-21/usr/sbin/munin10:20:160
1267899579,15cyclictest15498-21ntp_states09:25:230
1267899578,16cyclictest13737-21/usr/sbin/munin11:25:220
1267899578,15cyclictest20367-21/usr/sbin/munin09:45:280
1267899578,14cyclictest21646-21/usr/sbin/munin09:50:290
1267899577,18cyclictest20180-21/usr/sbin/munin11:50:130
12678995733,15cyclictest28348-21/usr/sbin/munin12:20:230
12678995733,15cyclictest23233-21/usr/sbin/munin07:50:140
12678995731,16cyclictest19365-21/usr/sbin/munin09:40:190
12678995711,17cyclictest24091-21sh10:00:000
1267899569,15cyclictest307-21munin-node11:40:100
1267899568,18cyclictest30565-21df12:30:110
1267899568,17cyclictest8564-21/usr/sbin/munin11:05:190
1267899568,16cyclictest2113-21/usr/sbin/munin10:40:240
1267899567,16cyclictest11312-21/usr/sbin/munin09:10:270
12678995632,15cyclictest14263-21/usr/sbin/munin07:15:180
12678995631,17cyclictest24323-21/usr/sbin/munin10:00:110
12678995631,16cyclictest18088-21/usr/sbin/munin07:30:150
12678995610,16cyclictest22415-21sshd11:58:200
12678995610,15cyclictest3797-21sendmail_mailqu10:45:250
1267899559,17cyclictest288-21snmpd09:04:210
1267899559,16cyclictest5963-21/usr/sbin/munin10:55:270
1267899559,15cyclictest796-21/usr/sbin/munin10:35:140
1267899559,15cyclictest12860-21/usr/sbin/munin09:15:200
1267899558,14cyclictest31798-21/usr/sbin/munin12:35:160
1267899557,16cyclictest16485-21/usr/sbin/munin09:30:240
1267899556,17cyclictest26821-21seq12:15:180
12678995532,15cyclictest13263-21runrttasks11:22:100
1267899548,15cyclictest288-21snmpd12:07:200
1267899548,13cyclictest7271-21/usr/sbin/munin11:00:260
1267899539,13cyclictest12312-21munin-run11:20:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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