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2025-12-08 - 13:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot6s.osadl.org (updated Mon Dec 08, 2025 00:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3489004997413,18cyclictest3544958-21/usr/sbin/munin00:35:201
348901199731,58cyclictest0-21swapper/300:20:143
348900299651,23cyclictest0-21swapper/019:30:020
3489008995745,8cyclictest0-21swapper/222:20:292
348900499579,17cyclictest3536983-21apt-get23:50:011
348900299531,15cyclictest15-21rcuc/021:10:010
348900299531,15cyclictest15-21rcuc/021:10:010
3489008995240,9cyclictest3518223-21sendmail22:00:002
3489008995231,4cyclictest32-21ksoftirqd/220:35:222
3489008995231,4cyclictest32-21ksoftirqd/220:35:212
3489004995239,9cyclictest0-21swapper/121:45:001
3489004995236,11cyclictest0-21swapper/121:50:011
3489004995233,10cyclictest0-21swapper/119:15:021
3489004995233,10cyclictest0-21swapper/119:15:011
3489008995135,10cyclictest3512178-21grep21:20:302
3489008995022,25cyclictest0-21swapper/219:25:222
3489004995040,5cyclictest3510440-21munin-plugin-st21:14:591
3489002995042,5cyclictest0-21swapper/019:15:010
3489002995042,5cyclictest0-21swapper/019:15:010
3489008994938,6cyclictest0-21swapper/220:45:302
3489002994939,8cyclictest3500309-21munin-plugin-st20:14:590
3489008994837,7cyclictest3534446-21munin-plugin-st23:34:592
3489008994835,10cyclictest3525067-21sendmail22:40:002
3489008994826,11cyclictest311ktimers/223:25:172
3489002994821,24cyclictest3525919-21latency_hist22:45:010
3489008994729,13cyclictest311ktimers/222:45:132
3489004994738,5cyclictest3517377-21munin-plugin-st21:54:591
3489004994737,5cyclictest0-21swapper/121:39:591
348900499472,39cyclictest231ktimers/119:55:141
348900299477,31cyclictest21250irq/208-8000000.ethernet00:10:110
3489002994741,4cyclictest3507909-21sendmail21:00:000
3489002994632,9cyclictest0-21swapper/020:50:310
3489002994632,9cyclictest0-21swapper/020:50:300
348900299461,8cyclictest0-21swapper/020:40:010
348900299461,8cyclictest0-21swapper/020:40:010
3489008994532,8cyclictest0-21swapper/219:45:282
3489008994516,25cyclictest3525931-21apt-key22:45:012
3489004994536,4cyclictest3518217-21sh22:00:001
3489004994511,17cyclictest3488997-21cyclictest22:20:031
3489008994432,8cyclictest0-21swapper/219:15:302
3489008994431,7cyclictest0-21swapper/222:25:292
3489008994431,7cyclictest0-21swapper/222:25:292
3489004994433,6cyclictest3533606-21munin-plugin-st23:30:001
3489002994433,9cyclictest0-21swapper/023:55:000
348900299443,37cyclictest0-21swapper/021:35:290
3489002994431,9cyclictest0-21swapper/021:40:290
3489002994429,10cyclictest0-21swapper/023:05:340
3489008994334,5cyclictest0-21swapper/219:15:002
3489008994334,5cyclictest0-21swapper/219:15:002
3489008994328,10cyclictest311ktimers/222:10:132
3489008994327,11cyclictest0-21swapper/220:55:292
3489008994324,13cyclictest311ktimers/223:20:122
3489004994335,4cyclictest0-21swapper/122:30:011
3489004994335,4cyclictest0-21swapper/122:30:001
3489004994326,13cyclictest231ktimers/123:40:131
3489004994326,13cyclictest231ktimers/123:40:131
348900499431,6cyclictest0-21swapper/122:50:011
3489002994338,2cyclictest0-21swapper/021:45:240
3489002994331,8cyclictest0-21swapper/021:30:300
3489002994331,7cyclictest0-21swapper/022:45:290
3489002994327,11cyclictest0-21swapper/019:40:290
3489008994229,7cyclictest311ktimers/221:40:122
3489008994228,9cyclictest0-21swapper/223:55:292
3489008994227,10cyclictest311ktimers/200:00:242
3489004994226,13cyclictest231ktimers/119:40:161
3489002994235,4cyclictest0-21swapper/022:25:130
3489002994235,4cyclictest0-21swapper/022:25:130
3489002994230,7cyclictest0-21swapper/021:00:320
3489002994227,11cyclictest0-21swapper/022:00:290
3489002994226,9cyclictest0-21swapper/022:05:220
3489002994224,14cyclictest131ktimers/000:25:180
348900299421,9cyclictest0-21swapper/021:55:190
3489008994132,5cyclictest0-21swapper/221:50:222
3489008994132,4cyclictest3500242-21head20:10:322
3489008994132,4cyclictest3488997-21cyclictest21:10:002
3489008994132,4cyclictest3488997-21cyclictest21:10:002
3489008994131,5cyclictest0-21swapper/223:00:262
348900499418,6cyclictest3511281-21apt-get21:20:011
3489004994125,8cyclictest0-21swapper/119:25:321
348900299414,25cyclictest3532750-21kworker/u8:3+events_power_efficient23:30:160
3489002994129,8cyclictest0-21swapper/023:00:290
3489002994127,8cyclictest0-21swapper/000:05:290
3489002994126,9cyclictest0-21swapper/020:20:310
3489002994126,9cyclictest0-21swapper/020:20:300
348900299411,4cyclictest0-21swapper/022:15:000
3489008994030,7cyclictest3513807-21grep21:30:302
3489008994029,6cyclictest3495158-21grep19:40:292
3489004994031,5cyclictest3538782-21grep23:55:311
3489004994024,12cyclictest231ktimers/120:45:151
3489004994021,15cyclictest231ktimers/121:25:131
3489004994021,14cyclictest231ktimers/123:50:141
348900299403,4cyclictest0-21swapper/021:55:000
3489002994034,4cyclictest21250irq/208-8000000.ethernet23:45:280
348900899395,28cyclictest32-21ksoftirqd/219:55:212
3489008993926,8cyclictest0-21swapper/222:50:302
3489004993930,5cyclictest0-21swapper/100:09:591
3489004993927,8cyclictest0-21swapper/119:15:051
3489004993922,12cyclictest231ktimers/122:55:131
348900299393,5cyclictest0-21swapper/022:55:000
3489002993928,8cyclictest0-21swapper/023:15:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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