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2026-09-15 - 15:55

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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 here to display the system's profile data or here to proceed to next system.
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: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot1s.osadl.org (updated Tue Sep 15, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1699421260,3chrt0-21swapper/008:44:220
1699421260,3chrt0-21swapper/008:44:220
215242950,3sleep00-21swapper/011:49:230
215242950,3sleep00-21swapper/011:49:230
11912830,3chrt0-21swapper/207:59:422
11912830,3chrt0-21swapper/207:59:422
114952830,4sleep20-21swapper/211:19:422
114952830,4sleep20-21swapper/211:19:422
114952830,4sleep20-21swapper/211:19:422
169112820,3sleep20-21swapper/210:09:312
251562690,3chrt0-21swapper/210:29:412
251562690,3chrt0-21swapper/210:29:412
310552560,2sleep20-21swapper/207:54:312
13082550,3sleep20-21swapper/209:29:192
13082550,3sleep20-21swapper/209:29:192
154402530,3chrt0-21swapper/010:04:380
242232490,4sleep20-21swapper/211:54:392
185922490,3sleep20-21swapper/210:14:292
4772480,2sleep30-21swapper/309:24:373
4772480,2sleep30-21swapper/309:24:373
308472470,2sleep00-21swapper/007:54:290
306782460,3chrt0-21swapper/209:19:342
306782460,3chrt0-21swapper/209:19:342
241782450,2sleep019737-21kworker/u9:1+xprtiod10:29:310
241782450,2sleep019737-21kworker/u9:1+xprtiod10:29:310
21772440,6sleep016-21ksoftirqd/008:04:300
21772440,6sleep016-21ksoftirqd/008:04:300
122922430,4sleep011453-21/usr/sbin/munin08:29:390
3022420,5sleep0307-21unixbench_singl10:49:410
3022420,5sleep0307-21unixbench_singl10:49:410
194572420,2sleep019582-21cat08:49:340
194572420,2sleep019582-21cat08:49:340
16045994125,14cyclictest16730-21fschecks_count10:09:301
89442400,3chrt0-21swapper/209:49:252
41242400,2sleep20-21swapper/209:34:382
172312400,3chrt0-21swapper/011:34:430
1604599392,5cyclictest700-21192.168.115.40-manager10:55:351
52462380,3sleep15250-21timerwakeupswit12:29:401
1604599381,8cyclictest11066-21ntp_kernel_err11:19:371
1604599381,8cyclictest11066-21ntp_kernel_err11:19:371
1604599381,8cyclictest11066-21ntp_kernel_err11:19:371
111422380,2sleep20-21swapper/209:54:312
1604599376,7cyclictest11365-21date08:29:221
1604599376,7cyclictest11365-21date08:29:221
1604599371,9cyclictest749-21runrttasks08:06:561
1604599371,9cyclictest749-21runrttasks08:06:561
1604599371,9cyclictest10005-21sshd11:17:441
16045993719,16cyclictest29816-21fschecks_count10:44:301
1604599371,8cyclictest14671-21/usr/sbin/munin10:04:291
1604599371,6cyclictest8040-21sshd11:11:441
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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