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2026-09-23 - 20:41

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 Wed Sep 23, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2001321050,2chrt20014-21/usr/sbin/munin09:19:440
2001321050,2chrt20014-21/usr/sbin/munin09:19:440
109202790,3sleep30-21swapper/311:49:383
109202790,3sleep30-21swapper/311:49:383
166342770,4sleep30-21swapper/307:44:403
154512730,2chrt0-21swapper/209:09:292
47362690,1sleep04741-21interrupts08:39:400
47362690,1sleep04741-21interrupts08:39:400
126542690,2chrt12648-21cpuspeed11:54:410
151192600,1chrt0-21swapper/007:39:460
151192600,1chrt0-21swapper/007:39:460
115962580,2sleep00-21swapper/008:59:260
162592560,3sleep0181rcu_preempt07:44:370
130332550,3sleep30-21swapper/307:34:433
130332550,3sleep30-21swapper/307:34:433
301652530,3sleep00-21swapper/012:39:440
301652530,3sleep00-21swapper/012:39:440
74982520,2sleep10-21swapper/110:14:321
188662520,3sleep018868-21head12:09:410
130982500,4sleep10-21swapper/107:34:451
130982500,4sleep10-21swapper/107:34:451
19652490,4sleep30-21swapper/311:24:413
19652490,4sleep30-21swapper/311:24:413
319402480,3sleep20-21swapper/211:19:382
319402480,3sleep20-21swapper/211:19:382
132552440,3chrt0-21swapper/210:29:372
132552440,3chrt0-21swapper/210:29:372
253012420,3chrt0-21swapper/108:09:261
253012420,3chrt0-21swapper/108:09:261
308582410,1sleep3431rcuc/309:49:383
308582410,1sleep3431rcuc/309:49:383
293102410,2sleep129313-21unixbench_multi11:09:481
293102410,2sleep129313-21unixbench_multi11:09:481
187602410,2sleep018803-21grep10:44:350
187602410,2sleep018803-21grep10:44:350
529799399,5cyclictest281ktimers/109:03:261
5297993830,6cyclictest21695-21kernelversion09:24:411
40892370,2sleep2351rcuc/210:04:402
162332370,2sleep30-21swapper/312:04:293
162332370,2sleep30-21swapper/312:04:293
162332370,2sleep30-21swapper/312:04:293
287992360,3sleep30-21swapper/311:09:423
287992360,3sleep30-21swapper/311:09:423
264712360,3sleep20-21swapper/211:04:382
232252360,2sleep123407-21tail09:29:391
142802360,3sleep30-21swapper/311:59:263
323602350,5sleep30-21swapper/308:24:483
285662350,2sleep20-21swapper/209:44:302
285662350,2sleep20-21swapper/209:44:302
24642350,2sleep02468-21cpuspeed08:34:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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