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2025-11-19 - 03:52

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 Nov 19, 2025 00:44:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1474621290,3chrt0-21swapper/319:58:383
2440321270,2sleep30-21swapper/320:23:473
2243121240,2sleep30-21swapper/323:08:483
2243121240,2sleep30-21swapper/323:08:483
748521140,3sleep30-21swapper/323:53:513
2679521010,1sleep00-21swapper/020:28:500
132052920,2sleep113208-21missed_timers00:08:521
266832850,1sleep0171ktimers/023:18:540
325962820,3sleep30-21swapper/320:43:533
193722800,3sleep30-21swapper/321:33:573
193722800,3sleep30-21swapper/321:33:573
207172760,1sleep00-21swapper/020:13:510
14752740,4sleep30-21swapper/323:38:513
259932600,3sleep30-21swapper/323:18:413
300722590,2sleep20-21swapper/222:03:472
300722590,2sleep20-21swapper/222:03:472
305652580,2sleep30-21swapper/320:38:503
305652580,2sleep30-21swapper/320:38:503
30094995724,10cyclictest20529-21apt-get20:13:491
30093995529,5cyclictest29690-21apt-get22:03:360
30093995529,5cyclictest29690-21apt-get22:03:360
254902550,2chrt0-21swapper/220:23:582
151042550,3sleep30-21swapper/321:23:483
151042550,3sleep30-21swapper/321:23:483
34732540,3sleep03476-21fschecks_count19:28:490
34732540,3sleep03476-21fschecks_count19:28:490
242012540,3sleep20-21swapper/223:13:542
242012540,3sleep20-21swapper/223:13:542
59022530,2sleep30-21swapper/319:33:543
59022530,2sleep30-21swapper/319:33:543
301832520,3sleep30-21swapper/320:38:393
301832520,3sleep30-21swapper/320:38:393
109312510,3chrt0-21swapper/322:38:463
109312510,3chrt0-21swapper/322:38:463
30093995036,11cyclictest8948-21apt-get22:33:460
30093994919,17cyclictest2485-21taskset23:39:520
266922490,1sleep00-21swapper/021:53:520
30093994836,9cyclictest5400-21apt-get20:58:460
30093994738,4cyclictest32199-21apt-get20:43:490
30093994719,16cyclictest21821-21chrt21:39:370
30093994719,16cyclictest21821-21chrt21:39:370
30093994632,10cyclictest10994-21apt-get19:48:470
30093994618,10cyclictest4987-21chrt20:56:280
30093994618,10cyclictest4987-21chrt20:56:280
30093994616,19cyclictest0-21swapper/021:05:390
30093994616,19cyclictest0-21swapper/021:05:390
30093994533,9cyclictest3056-21apt-get23:43:470
30093994533,9cyclictest3056-21apt-get23:43:470
30093994532,9cyclictest29819-21apt-get23:28:470
30093994532,9cyclictest29819-21apt-get23:28:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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