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2026-05-10 - 09:33

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 Sun May 10, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3007664997265,4cyclictest131ktimers/019:30:000
300766499702,29cyclictest15-21rcuc/000:35:010
3007668996827,36cyclictest0-21swapper/222:40:272
3007668996628,33cyclictest0-21swapper/221:20:002
300766499656,28cyclictest15-21rcuc/020:20:010
3007667996337,21cyclictest0-21swapper/123:20:011
3007667996324,29cyclictest0-21swapper/120:25:231
3007667996324,29cyclictest0-21swapper/120:25:231
3007668996233,23cyclictest0-21swapper/222:45:272
300766899622,16cyclictest3019947-21apt-get20:20:152
300766899614,51cyclictest3057145-21apt-get00:00:022
300766899614,51cyclictest3057145-21apt-get00:00:022
3007668996136,21cyclictest3052922-21cron23:35:012
3007668996115,38cyclictest0-21swapper/222:50:252
3007667996123,32cyclictest0-21swapper/119:20:011
3007667996115,38cyclictest0-21swapper/100:00:001
3007667996115,38cyclictest0-21swapper/100:00:001
3007667996053,4cyclictest1653-21lldpd21:05:121
3007668995933,21cyclictest0-21swapper/223:00:272
3007668995924,26cyclictest0-21swapper/221:00:282
3007668995924,26cyclictest0-21swapper/221:00:282
3007668995919,34cyclictest3030737-21grep21:20:292
3007668995919,33cyclictest0-21swapper/223:45:282
3007668995919,33cyclictest0-21swapper/223:45:282
3007668995914,36cyclictest0-21swapper/223:35:262
3007668995912,39cyclictest3021426-21munin-plugin-st20:30:002
3007668995912,39cyclictest3021426-21munin-plugin-st20:30:002
3007668995820,31cyclictest0-21swapper/219:55:202
3007668995814,38cyclictest1660-21snmpd20:07:252
3007667995834,20cyclictest3048519-21unixbench_multi23:05:281
3007664995851,5cyclictest131ktimers/022:10:010
3007668995711,38cyclictest3011493-21/usr/sbin/munin19:30:192
3007667995717,31cyclictest0-21swapper/119:15:011
3007664995741,12cyclictest3029951-21sendmail21:20:000
300766899566,45cyclictest3050300-21apt-get23:20:022
3007668995612,36cyclictest0-21swapper/221:05:272
300766799569,6cyclictest3056263-21grep23:50:271
3007668995522,28cyclictest0-21swapper/200:25:202
3007668995517,29cyclictest0-21swapper/222:05:282
300766899551,33cyclictest0-21swapper/221:50:002
3007667995522,29cyclictest0-21swapper/123:45:271
3007667995522,29cyclictest0-21swapper/123:45:261
300766899544,10cyclictest3041737-21sed22:25:272
3007668995417,29cyclictest0-21swapper/223:10:272
3007668995416,32cyclictest0-21swapper/200:20:202
3007668995414,30cyclictest0-21swapper/222:20:192
3007668995414,30cyclictest0-21swapper/222:20:192
3007668995411,35cyclictest0-21swapper/200:10:242
3007668995411,35cyclictest0-21swapper/200:10:232
300766799542,9cyclictest3038239-21/usr/sbin/munin22:05:271
3007667995427,21cyclictest3060831-21/usr/sbin/munin00:20:291
3007667995412,33cyclictest0-21swapper/123:10:241
3007668995327,22cyclictest3019425-21phc2sys-jitter20:15:262
3007668995327,21cyclictest0-21swapper/219:35:222
3007668995314,30cyclictest0-21swapper/220:40:232
3007668995313,33cyclictest0-21swapper/220:50:302
300766799533,15cyclictest3015413-21tail19:50:281
3007667995331,17cyclictest3054558-21grep23:40:271
3007667995325,21cyclictest0-21swapper/123:00:271
3007667995319,27cyclictest0-21swapper/122:45:281
3007667995311,35cyclictest0-21swapper/120:55:301
300766499531,48cyclictest3036696-21cron22:00:000
300766899527,35cyclictest0-21swapper/222:15:212
300766899523,6cyclictest3023231-21apt-key20:40:012
300766899523,6cyclictest3023231-21apt-key20:40:002
3007668995216,27cyclictest0-21swapper/219:30:012
300766899521,10cyclictest3031915-21/usr/sbin/munin21:30:202
300766799522,9cyclictest3060055-21/usr/sbin/munin00:15:191
3007667995215,31cyclictest1660-21snmpd20:15:591
3007667995213,29cyclictest0-21swapper/121:25:251
3007667995210,34cyclictest0-21swapper/119:20:271
3007664995242,5cyclictest167350irq/118-8000000.ethernet-tx022:15:170
3007664995214,33cyclictest0-21swapper/021:40:220
3007664995214,33cyclictest0-21swapper/021:40:220
300766899512,9cyclictest3024588-21phc2sys20:45:272
3007668995125,18cyclictest0-21swapper/219:15:272
3007668995122,21cyclictest0-21swapper/221:10:292
3007668995121,23cyclictest3017109-21grep20:00:282
3007668995120,22cyclictest0-21swapper/200:30:252
300766899511,11cyclictest3035534-21/usr/sbin/munin21:50:232
300766899511,10cyclictest3036919-21apt-get22:00:162
3007668995110,31cyclictest0-21swapper/219:20:282
300766799518,6cyclictest0-21swapper/120:40:011
300766799518,6cyclictest0-21swapper/120:40:011
300766799515,12cyclictest3030706-21sed21:20:281
3007667995134,12cyclictest0-21swapper/100:40:001
300766799512,9cyclictest3042868-21grep22:35:011
300766799512,10cyclictest3041070-21sed22:25:021
300766799512,10cyclictest3041070-21sed22:25:011
3007667995119,26cyclictest3025674-21grep20:50:291
3007667995119,25cyclictest0-21swapper/121:40:011
3007667995115,29cyclictest0-21swapper/121:55:001
3007667995115,29cyclictest0-21swapper/119:35:221
3007667995112,31cyclictest231ktimers/121:45:011
3007667995112,31cyclictest231ktimers/121:45:001
300766799511,12cyclictest3018246-21apt-get20:10:141
3007664995113,7cyclictest0-21swapper/000:00:020
3007664995113,7cyclictest0-21swapper/000:00:010
300766899502,9cyclictest3046620-21/usr/sbin/munin22:55:272
300766899502,8cyclictest3050764-21cut23:20:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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