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2026-08-30 - 15:02

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 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 792 highest latencies:
System rack4slot6s.osadl.org (updated Sun Aug 30, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30261214020,97sleep030312-21df07:05:120
2615621290,2sleep026157-21df11:00:140
309421230,4chrt3091-21ntp_states09:30:220
1340221220,4chrt13403-21mailstats12:15:260
1309321200,3sleep013089-21latency_hist10:10:010
3259321170,2sleep032590-21grep09:20:010
771321160,4chrt7714-21apt.systemd.dai09:49:020
967621140,3sleep09725-21users12:00:330
1806821130,4chrt18067-21cut12:35:010
143621050,4sleep01441-21sshd11:30:140
599021010,3sleep05991-21users09:40:300
171252920,3sleep017059-21/usr/sbin/munin10:25:150
3822900,3sleep0413-21latency09:20:200
162912866,65sleep016352-21/usr/sbin/munin08:15:260
117632858,62sleep011793-21idleruntime12:10:150
189822830,2sleep018984-21switchtime08:25:280
256092818,60sleep025610-21sshd08:51:140
277982796,60sleep027802-21ntp_states09:00:220
241982770,2sleep024196-21timerwakeupswit08:45:270
104692714,55sleep010473-21df_inode12:05:120
226192670,2sleep022620-21wc10:45:250
31457996620,16cyclictest16168-21/usr/sbin/munin12:25:280
31457996338,14cyclictest23641-21/usr/sbin/munin10:50:150
31457996334,18cyclictest0-21swapper11:15:120
31457996311,18cyclictest6534-21/usr/sbin/munin11:50:190
90912593,8sleep00-21swapper07:48:220
3145799599,18cyclictest288-21snmpd11:42:150
3145799599,18cyclictest21636-21/usr/sbin/munin08:35:290
31457995934,15cyclictest10990-21/usr/sbin/munin07:55:220
31457995910,16cyclictest31560-21/usr/sbin/munin07:10:270
3145799589,18cyclictest276-21runrttasks10:00:200
3145799589,16cyclictest5468-21cat07:35:010
3145799589,16cyclictest2846-21memory11:35:170
3145799589,15cyclictest19317-21/usr/sbin/munin12:40:020
3145799588,16cyclictest374-21/usr/sbin/munin07:15:140
3145799588,15cyclictest28800-21/usr/sbin/munin09:05:210
3145799587,18cyclictest2985-21/usr/sbin/munin07:25:130
3145799586,18cyclictest10462-21awk10:00:000
31457995834,14cyclictest15957-21/usr/sbin/munin10:20:180
31457995831,18cyclictest14786-21/usr/sbin/munin10:15:240
31457995810,16cyclictest14860-21/usr/sbin/munin08:10:200
3145799579,15cyclictest307-21munin-node07:20:100
3145799579,15cyclictest14299-21/usr/sbin/munin12:20:260
31457995735,13cyclictest20106-21/usr/sbin/munin10:35:270
31457995731,17cyclictest12723-21runrttasks08:01:140
31457995731,15cyclictest30575-21/usr/sbin/munin09:10:280
31457995710,16cyclictest288-21snmpd10:34:280
31457995710,16cyclictest26345-21/usr/sbin/munin08:55:170
3145799569,17cyclictest7973-21seq07:44:430
3145799569,17cyclictest17447-21tr08:20:190
3145799569,15cyclictest8399-21/usr/sbin/munin09:50:240
3145799569,14cyclictest138952sleep010:11:260
3145799568,16cyclictest5770-21awk11:45:270
3145799568,15cyclictest5835-21ntp_states07:35:210
31457995633,14cyclictest22546-21/usr/sbin/munin08:40:190
31457995633,14cyclictest19942-21/usr/sbin/munin08:30:180
31457995632,16cyclictest1024-21runrttasks11:28:120
31457995632,15cyclictest1593-21/usr/sbin/munin09:25:140
31457995631,16cyclictest4672-21/usr/sbin/munin09:35:280
31457995631,15cyclictest8893-21runrttasks11:59:250
31457995610,16cyclictest21238-21open_files10:40:240
3145799558,15cyclictest13455-21chrt08:05:170
31457995531,16cyclictest28861-21/usr/sbin/munin11:10:190
31457995530,15cyclictest27521-21/usr/sbin/munin11:05:160
31457995510,18cyclictest9535-21if_eth007:50:130
3145799547,14cyclictest31406-21/usr/sbin/munin11:20:140
31457995430,16cyclictest25874-21runrttasks10:59:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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