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2026-09-20 - 18:46

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 Sun Sep 20, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1178821300,2sleep20-21swapper/209:54:442
1178821300,2sleep20-21swapper/209:54:442
2914521270,3sleep30-21swapper/312:09:363
2914521270,3sleep30-21swapper/312:09:363
3253721070,3sleep20-21swapper/209:24:412
182121010,2sleep30-21swapper/309:29:413
54842880,2chrt5470-21awk12:34:231
54842880,2chrt5470-21awk12:34:231
80602800,2sleep18064-21gzip08:19:411
80602800,2sleep18064-21gzip08:19:411
172812780,2sleep20-21swapper/210:09:442
247462680,2sleep124748-21sed07:39:281
64132630,2sleep115787-21cyclictest12:34:431
64132630,2sleep115787-21cyclictest12:34:431
194082620,3sleep30-21swapper/308:49:413
194082620,3sleep30-21swapper/308:49:413
315262600,3sleep30-21swapper/310:49:373
315262600,3sleep30-21swapper/310:49:373
299592570,1chrt29958-21missed_timers10:44:390
299592570,1chrt29958-21missed_timers10:44:390
297812560,6sleep129785-21unixbench_singl07:49:451
297812560,6sleep129785-21unixbench_singl07:49:451
186652560,2chrt0-21swapper/210:14:382
297362530,3chrt0-21swapper/309:19:243
218302530,2sleep021872-21proc_pri07:29:430
149452520,3sleep00-21swapper/011:29:460
149452520,3sleep00-21swapper/011:29:460
45262500,3sleep20-21swapper/212:29:412
45262500,3sleep20-21swapper/212:29:412
158952500,4sleep014678-21systemd-journal10:07:410
158952500,4sleep014678-21systemd-journal10:07:410
130622500,2sleep10-21swapper/109:59:381
130622500,2sleep10-21swapper/109:59:381
273612490,2sleep20-21swapper/207:44:402
273612490,2sleep20-21swapper/207:44:402
278532470,2sleep129-21ksoftirqd/110:39:381
278532470,2sleep129-21ksoftirqd/110:39:381
143932460,2sleep114392-21memory11:29:391
143932460,2sleep114392-21memory11:29:391
15790994524,18cyclictest0-21swapper/011:44:340
15790994524,18cyclictest0-21swapper/011:44:340
66642430,1chrt0-21swapper/208:14:472
66642430,1chrt0-21swapper/208:14:472
327172430,2sleep016-21ksoftirqd/009:24:430
15790994315,3cyclictest0-21swapper/010:17:260
15790994219,21cyclictest24060-21idleruntime-cro09:04:220
15790994219,21cyclictest24060-21idleruntime-cro09:04:220
15790994219,21cyclictest24060-21idleruntime-cro09:04:220
55002410,2sleep10-21swapper/109:39:401
55002410,2sleep10-21swapper/109:39:401
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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