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2026-05-10 - 23:28

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 May 10, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3057321200,2sleep130575-21cat07:37:381
3057321200,2sleep130575-21cat07:37:381
321321150,4sleep20-21swapper/209:17:372
321321150,4sleep20-21swapper/209:17:372
119522950,4sleep20-21swapper/209:42:302
250972680,1sleep125099-21latency_hist10:17:301
252112670,3sleep30-21swapper/310:17:323
252112670,3sleep30-21swapper/310:17:323
103862670,3chrt0-21swapper/008:11:460
113262660,3sleep30-21swapper/311:07:293
113262660,3sleep30-21swapper/311:07:293
113262660,3sleep30-21swapper/311:07:293
180992640,3sleep20-21swapper/209:57:372
301032600,2sleep30-21swapper/310:27:453
301032600,2sleep30-21swapper/310:27:453
242302590,2chrt0-21swapper/308:47:353
242302590,2chrt0-21swapper/308:47:353
289412580,2sleep20-21swapper/211:52:392
289412580,2sleep20-21swapper/211:52:392
24772570,3sleep30-21swapper/312:07:443
24772570,3sleep30-21swapper/312:07:443
24772570,3sleep30-21swapper/312:07:443
77642540,3sleep20-21swapper/212:22:372
77642540,3sleep20-21swapper/212:22:372
240732540,3sleep20-21swapper/208:47:342
240732540,3sleep20-21swapper/208:47:342
279712530,3sleep027498-21/usr/sbin/munin08:57:370
156192490,2chrt15617-21grep08:22:440
156192490,2chrt15617-21grep08:22:440
34522450,2sleep13261-21/usr/sbin/munin12:12:321
34522450,2sleep13261-21/usr/sbin/munin12:12:321
267482450,2sleep126749-21cron10:22:211
267482450,2sleep126749-21cron10:22:211
20813994425,17cyclictest0-21swapper/109:42:211
20813994425,17cyclictest0-21swapper/109:42:211
20813994318,23cyclictest3363-21processes09:17:421
20813994318,23cyclictest3363-21processes09:17:421
78842420,3sleep10-21swapper/112:22:411
78842420,3sleep10-21swapper/112:22:411
284342420,3sleep30-21swapper/308:57:443
17352420,3sleep10-21swapper/107:47:351
17352420,3sleep10-21swapper/107:47:351
118372420,2sleep30-21swapper/308:12:463
112532420,3sleep30-21swapper/312:32:353
35172410,3sleep00-21swapper/009:17:430
35172410,3sleep00-21swapper/009:17:430
20813994117,3cyclictest0-21swapper/108:08:111
126172410,3chrt0-21swapper/211:07:442
126172410,3chrt0-21swapper/211:07:442
126172410,3chrt0-21swapper/211:07:442
126172410,3chrt0-21swapper/211:07:442
20813994019,3cyclictest9874-21latency_hist09:37:221
20813994019,3cyclictest9874-21latency_hist09:37:221
20813994019,3cyclictest9874-21latency_hist09:37:221
313532380,2sleep131356-21grep11:57:441
313532380,2sleep131356-21grep11:57:441
20807993825,11cyclictest31426-21netstat10:32:400
20807993825,11cyclictest31426-21netstat10:32:400
163882380,2sleep016441-21grep09:52:380
20813993728,7cyclictest11362-21netstat08:12:401
48602360,3chrt0-21swapper/209:22:362
48602360,3chrt0-21swapper/209:22:362
48602360,3chrt0-21swapper/209:22:362
20813993629,5cyclictest16074-21latency_hist08:27:211
20813993629,5cyclictest16074-21latency_hist08:27:211
20813993619,15cyclictest0-21swapper/109:57:351
98782350,2sleep09879-21mailstats12:27:420
98782350,2sleep09879-21mailstats12:27:420
173132350,3sleep10-21swapper/108:27:431
173132350,3sleep10-21swapper/108:27:431
133262350,2sleep013437-21fschecks_time11:12:340
133262350,2sleep013437-21fschecks_time11:12:340
133262350,2sleep013437-21fschecks_time11:12:340
133262350,2sleep013437-21fschecks_time11:12:340
326372340,3sleep020805-21cyclictest07:42:400
326372340,3sleep020805-21cyclictest07:42:400
326372340,3sleep020805-21cyclictest07:42:400
20813993427,5cyclictest3104-21idleruntime-cro12:12:211
20807993429,3cyclictest32385-21gltestperf12:02:330
20807993429,3cyclictest32385-21gltestperf12:02:330
20807993426,6cyclictest6512-21tr10:52:390
20807993426,6cyclictest6512-21tr10:52:390
20813993323,8cyclictest8329-21fschecks_count09:32:341
20813993323,8cyclictest8329-21fschecks_count09:32:341
20807993326,5cyclictest11671-21threads08:12:450
182112330,2sleep118214-21unixbench-2d11:22:431
182112330,2sleep118214-21unixbench-2d11:22:431
182112330,2sleep118214-21unixbench-2d11:22:431
182112330,2sleep118214-21unixbench-2d11:22:431
20813993225,5cyclictest26318-21cpuspeed07:27:321
20807993223,7cyclictest4772-21cron07:57:220
20807993222,8cyclictest1738-21cut12:07:340
20807993222,8cyclictest1738-21cut12:07:340
20807993222,8cyclictest1738-21cut12:07:340
303182310,1sleep030458-21/usr/sbin/munin09:02:450
303182310,1sleep030458-21/usr/sbin/munin09:02:450
20813993125,5cyclictest29008-21ntp_offset11:52:401
20813993125,5cyclictest29008-21ntp_offset11:52:401
20813993124,5cyclictest550-21cron10:52:211
20813993124,5cyclictest550-21cron10:52:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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