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2026-05-10 - 10:06

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 May 10, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1270921330,3sleep012706-21cat22:45:010
2239521300,2sleep022396-21which21:15:260
2852021170,4chrt28518-21df21:40:150
1669921170,2sleep016698-21sort20:55:010
1296921150,4chrt12968-21/usr/sbin/munin22:45:180
785521110,3chrt7858-21netstat22:25:190
2104321030,4sleep021046-21/usr/sbin/munin19:05:170
3201521020,2sleep032016-21basename00:00:010
2732721000,3sleep027328-21egrep19:30:100
64492995,12sleep06445-21ntp_states00:25:250
49232930,4sleep04929-21df_inode00:20:150
34602916,13sleep03461-21sshd20:02:250
68062906,12sleep06876-21find20:15:260
250242900,2sleep025025-21mailstats21:25:240
130022896,12sleep013007-21df20:40:120
313372830,3sleep031385-21processes21:50:230
25962837,62sleep02625-21sort22:05:180
77642755,56sleep07768-21ntp_states00:30:230
99052740,4sleep09932-21systemctl00:40:000
105812740,2sleep010579-21sendmail_mailqu22:35:240
19672683,8sleep0288-21snmpd19:55:560
22061996216,15cyclictest18462-21/usr/sbin/munin23:05:270
4822613,8sleep00-21swapper00:02:010
22061996010,18cyclictest29781-21munin-run19:40:010
22061995934,16cyclictest14757-21/usr/sbin/munin20:45:290
2206199589,17cyclictest19404-21/usr/sbin/munin21:05:270
2206199589,16cyclictest16803-21/usr/sbin/munin20:55:160
2206199587,19cyclictest21854-21idleruntime-cro21:15:010
22061995833,17cyclictest430-21/usr/sbin/munin19:50:260
22061995813,16cyclictest27207-21df_inode21:35:120
2206199579,16cyclictest19410-21/usr/sbin/munin23:10:170
2206199579,15cyclictest32581-21ntpq21:55:210
2206199578,15cyclictest5018-21/usr/sbin/munin22:15:290
2206199578,15cyclictest25870-21/usr/sbin/munin21:30:130
2206199578,15cyclictest24258-21sshd21:23:240
2206199578,15cyclictest2261-21munin-node00:10:090
2206199578,14cyclictest9078-21/usr/sbin/munin20:25:300
2206199577,16cyclictest29746-21/usr/sbin/munin21:45:120
2206199577,16cyclictest21831-21/usr/sbin/munin23:20:240
2206199577,14cyclictest22157-21/usr/sbin/munin19:10:310
22061995733,15cyclictest23737-21/usr/sbin/munin19:15:240
22061995732,16cyclictest5382-21/usr/sbin/munin20:10:170
22061995732,15cyclictest14643-21/usr/sbin/munin22:50:260
22061995731,17cyclictest29969-21runrttasks19:40:120
22061995710,18cyclictest15525-21load22:55:180
2206199569,15cyclictest28278-21grep23:45:110
2206199569,15cyclictest10506-21/usr/sbin/munin20:30:160
2206199568,16cyclictest18113-21/usr/sbin/munin21:00:290
2206199568,15cyclictest2240-21date00:10:020
2206199568,13cyclictest25682-21/usr/sbin/munin23:35:200
2206199567,15cyclictest8902-21/usr/sbin/munin22:30:250
22061995635,14cyclictest31259-21/usr/sbin/munin19:45:120
22061995632,15cyclictest24099-21runrttasks23:28:370
22061995610,16cyclictest3736-21/usr/sbin/munin22:10:250
2206199559,16cyclictest11830-21memory20:35:180
2206199559,15cyclictest4164-21/usr/sbin/munin20:05:180
2206199558,16cyclictest17243-21chrt23:00:280
2206199558,15cyclictest7793-21/usr/sbin/munin20:20:140
2206199558,14cyclictest26990-21/usr/sbin/munin23:40:270
2206199557,15cyclictest307-21munin-node22:00:110
22061995533,14cyclictest24498-21/usr/sbin/munin23:30:150
22061995530,15cyclictest30389-21runrttasks23:52:220
2206199549,14cyclictest20956-21awk23:15:260
22061995433,14cyclictest6322-21runrttasks22:20:030
22061995431,15cyclictest4230-21runrttasks00:16:070
22061995431,14cyclictest26191-21/usr/sbin/munin19:25:170
22061995431,14cyclictest24843-21/usr/sbin/munin19:20:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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