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2026-01-11 - 17:30

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 100 highest latencies:
System rack4slot1s.osadl.org (updated Sun Jan 11, 2026 12:44:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1687921120,1sleep00-21swapper/008:25:400
1687921120,1sleep00-21swapper/008:25:400
1223421000,2sleep20-21swapper/211:05:432
1223421000,2sleep20-21swapper/211:05:432
5302890,3sleep30-21swapper/310:35:363
5302890,3sleep30-21swapper/310:35:363
234802850,2sleep30-21swapper/308:40:513
234802850,2sleep30-21swapper/308:40:513
66022820,3sleep10-21swapper/107:55:501
66022820,3sleep10-21swapper/107:55:501
326682810,3sleep20-21swapper/212:00:422
46022790,3sleep20-21swapper/212:10:472
61942780,1sleep16195-21latency_hist10:50:341
61942780,1sleep16195-21latency_hist10:50:341
43552750,4chrt0-21swapper/207:50:452
105162750,3chrt0-21swapper/208:05:522
105162750,3chrt0-21swapper/208:05:522
56272690,3sleep05628-21latency_hist12:15:360
193002670,3sleep20-21swapper/211:25:372
193002670,3sleep20-21swapper/211:25:372
316092630,3sleep30-21swapper/309:05:313
316092630,3sleep30-21swapper/309:05:313
245812630,10sleep0201rcuc/008:45:420
236842610,2chrt23683-21awk08:40:520
236842610,2chrt23683-21awk08:40:520
288442570,1sleep10-21swapper/107:30:421
288442570,1sleep10-21swapper/107:30:421
273552560,2sleep30-21swapper/308:50:523
273552560,2sleep30-21swapper/308:50:523
311072550,2sleep30-21swapper/307:35:463
311072550,2sleep30-21swapper/307:35:463
311072550,2sleep30-21swapper/307:35:463
286352550,4sleep30-21swapper/307:30:403
286352550,4sleep30-21swapper/307:30:403
14222540,3sleep20-21swapper/210:35:482
14222540,3sleep20-21swapper/210:35:482
14222540,3sleep20-21swapper/210:35:482
227982530,1sleep00-21swapper/010:05:510
227982530,1sleep00-21swapper/010:05:510
11532530,3sleep30-21swapper/309:10:343
236202490,3chrt0-21swapper/011:35:440
236202490,3chrt0-21swapper/011:35:440
236202490,3chrt0-21swapper/011:35:440
29742460,3chrt0-21swapper/012:05:510
29742460,3chrt0-21swapper/012:05:510
27422460,3sleep20-21swapper/212:05:492
27422460,3sleep20-21swapper/212:05:492
284092450,2sleep00-21swapper/010:20:500
284092450,2sleep00-21swapper/010:20:500
155432450,2sleep20-21swapper/208:20:442
86622410,3sleep30-21swapper/309:30:373
225442410,2sleep30-21swapper/311:31:093
225442410,2sleep30-21swapper/311:31:093
324352390,3sleep00-21swapper/012:00:400
324352390,3sleep00-21swapper/012:00:400
21145993933,4cyclictest9125-21latency_hist08:05:280
21145993931,6cyclictest7956-21cron12:25:290
21145993931,6cyclictest7956-21cron12:25:290
293882380,3sleep30-21swapper/311:50:463
293882380,3sleep30-21swapper/311:50:463
21145993830,6cyclictest9841-21latency_hist12:30:290
91792370,2sleep30-21swapper/308:05:293
24162370,3sleep0171ktimers/007:45:440
24162370,3sleep0171ktimers/007:45:440
21145993729,5cyclictest201rcuc/010:39:080
21145993729,5cyclictest201rcuc/010:39:080
21145993729,5cyclictest201rcuc/010:39:080
169692370,1sleep116993-21/usr/sbin/munin09:50:491
169692370,1sleep116993-21/usr/sbin/munin09:50:491
21145993630,4cyclictest10355-21timerandwakeup08:05:510
21145993630,4cyclictest10355-21timerandwakeup08:05:510
21145993627,7cyclictest2956-21latency_hist09:15:300
21145993627,7cyclictest2956-21latency_hist09:15:300
239852350,3sleep30-21swapper/307:15:523
21146993529,4cyclictest21030-21idleruntime-cro11:30:291
21146993529,4cyclictest21030-21idleruntime-cro11:30:291
21146993529,4cyclictest21030-21idleruntime-cro11:30:291
21145993529,4cyclictest7412-21latency09:25:430
21145993528,6cyclictest352-21cron10:35:290
21145993528,6cyclictest352-21cron10:35:290
43962330,2chrt0-21swapper/310:45:373
43962330,2chrt0-21swapper/310:45:373
261042330,2sleep3431rcuc/308:50:363
2114899331,26cyclictest0-21swapper/310:27:533
2114899331,26cyclictest0-21swapper/310:27:533
21146993326,5cyclictest4630-21processes12:10:481
21145993316,4cyclictest90-1pr/ttyS012:30:390
21145993225,5cyclictest24655-21cron07:20:290
21145993222,7cyclictest6041-21threads09:20:520
21145993222,7cyclictest6041-21threads09:20:520
21145993213,3cyclictest201rcuc/007:36:480
21145993213,3cyclictest201rcuc/007:36:480
21145993213,3cyclictest201rcuc/007:36:480
207222320,3sleep00-21swapper/010:00:490
207222320,3sleep00-21swapper/010:00:490
2114899311,25cyclictest18379-21chrt08:29:333
2114899311,25cyclictest18379-21chrt08:29:333
21146993124,5cyclictest2080-21processes09:10:481
21146993124,5cyclictest2080-21processes09:10:481
21145993124,5cyclictest18367-21cut09:55:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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