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2026-07-15 - 03:59

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Wed Jul 15, 2026 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1114822470,4sleep011146-21grep20:40:250
2637922240,2sleep026380-21forks21:40:140
2012721840,3chrt20128-21mailstats23:20:270
2879921330,3sleep028794-21latency_hist21:50:020
797021270,3chrt7971-21latency_hist22:35:020
1582121270,3sleep015824-21tr21:00:000
289712990,4sleep028975-21ntp_states23:55:230
97732896,10sleep09771-21ntp_states20:35:240
189502876,69sleep018535-21/usr/sbin/munin21:10:280
246672790,3sleep024691-21run-parts23:40:000
1870127721,33sleep018750-21awk19:05:130
302972750,3sleep030298-21awk00:00:260
19898996426,28cyclictest21490-21/usr/sbin/munin21:20:250
19898996225,13cyclictest27643-21runrttasks23:50:200
1989899609,18cyclictest8023-21/usr/sbin/munin22:35:260
19898996020,15cyclictest6973-21df20:25:130
19898996010,18cyclictest21281-21/usr/sbin/munin19:15:200
19898995936,14cyclictest31871-21/usr/sbin/munin22:00:250
19898995934,15cyclictest27920-21/usr/sbin/munin19:40:160
19898995910,15cyclictest749-21ntp_states20:00:240
1989899589,18cyclictest2707-21/usr/sbin/munin00:20:210
1989899588,16cyclictest3988-21/usr/sbin/munin00:25:210
19898995834,15cyclictest576-21/usr/sbin/munin00:10:270
19898995833,16cyclictest13528-21/usr/sbin/munin22:55:260
19898995832,17cyclictest3792-21runrttasks20:11:430
19898995810,17cyclictest31665-21df19:55:130
1989899579,15cyclictest4177-21/usr/sbin/munin22:20:190
1989899578,16cyclictest31327-21modprobe22:00:010
1989899578,15cyclictest22890-21ntp_states19:20:230
1989899577,17cyclictest5269-21/usr/sbin/munin00:30:270
1989899577,16cyclictest2860-21/usr/sbin/munin22:15:150
19898995733,16cyclictest31762-21/usr/sbin/munin00:05:270
19898995733,15cyclictest5784-21/usr/sbin/munin20:20:170
19898995733,15cyclictest14598-21/usr/sbin/munin23:00:140
19898995733,14cyclictest10620-21/usr/sbin/munin22:45:110
19898995710,16cyclictest26113-21/usr/sbin/munin23:45:180
1989899569,19cyclictest23944-21seq19:25:130
1989899569,19cyclictest20901-21sshd21:19:200
1989899569,15cyclictest1798-21df20:05:110
1989899568,16cyclictest8343-21chrt20:30:160
1989899568,16cyclictest5459-21/usr/sbin/munin22:25:280
1989899568,16cyclictest20050-21df19:10:120
1989899568,15cyclictest18350-21/usr/sbin/munin23:15:260
1989899566,18cyclictest25015-21chrt23:40:160
19898995632,16cyclictest16180-21/usr/sbin/munin21:00:210
19898995610,15cyclictest22427-21/usr/sbin/munin21:25:250
1989899559,15cyclictest20959-21/usr/sbin/munin23:25:190
1989899559,14cyclictest11963-21df_inode22:50:150
1989899558,16cyclictest9333-21/usr/sbin/munin22:40:160
1989899558,16cyclictest24994-21/usr/sbin/munin21:35:290
1989899558,16cyclictest15785-21/usr/sbin/munin23:05:290
1989899558,14cyclictest28868-21/usr/sbin/munin21:50:190
1989899557,16cyclictest30329-21munin-node19:50:110
1989899557,16cyclictest17120-21df23:10:130
1989899557,15cyclictest10832sleep022:07:020
19898995533,13cyclictest23958-21/usr/sbin/munin21:30:190
19898995533,13cyclictest1970-21/usr/sbin/munin22:10:280
19898995531,15cyclictest1473-21/usr/sbin/munin00:15:150
19898995528,17cyclictest25463-21ntp_states19:30:220
19898995524,22cyclictest14199-21runrttasks20:52:250
19898995516,28cyclictest0-21swapper23:30:110
1989899547,18cyclictest4910-21/usr/sbin/munin20:15:300
1989899547,15cyclictest17243-21/usr/sbin/munin21:05:280
1989899547,14cyclictest6562-21egrep00:35:130
19898995426,17cyclictest12076-21/usr/sbin/munin20:45:100
19898995410,14cyclictest29045-21/usr/sbin/munin19:45:150
1989899539,16cyclictest26921-21swap19:35:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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