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2025-07-12 - 11:08

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 Sat Jul 12, 2025 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2277970998214,22cyclictest15-21rcuc/000:20:010
227797099731,66cyclictest0-21swapper/000:00:200
227797099731,2cyclictest0-21swapper/022:30:010
2277970997030,33cyclictest0-21swapper/021:55:210
2277970996965,2cyclictest0-21swapper/019:25:020
2277970996931,34cyclictest0-21swapper/021:10:290
227797099682,2cyclictest0-21swapper/020:00:010
227797099651,56cyclictest0-21swapper/020:50:210
227797099641,3cyclictest0-21swapper/021:00:010
227797099641,3cyclictest0-21swapper/021:00:010
2277970996357,3cyclictest0-21swapper/020:40:130
227797099621,8cyclictest2300110-21ps21:15:280
2277970996217,37cyclictest2284095-21grep19:40:330
2277970996129,23cyclictest0-21swapper/020:30:300
2277970996126,32cyclictest0-21swapper/019:25:290
2277970996119,37cyclictest0-21swapper/022:10:000
227797099611,52cyclictest0-21swapper/020:20:140
227797399608,18cyclictest22-21rcuc/122:05:011
227797099604,45cyclictest2311523-21grep22:20:290
2277970996037,20cyclictest2320913-21sendmail23:20:000
2277970996023,31cyclictest0-21swapper/022:00:230
2277970996012,4cyclictest0-21swapper/020:00:220
227797099592,16cyclictest2323447-21sed23:30:290
2277970995921,32cyclictest2317683-21latency_hist23:00:010
227797399583,34cyclictest24-21ksoftirqd/123:45:061
227797099583,9cyclictest2298568-21grep21:05:290
2277970995826,22cyclictest0-21swapper/023:45:190
2277970995818,31cyclictest0-21swapper/022:30:250
2277970995818,31cyclictest0-21swapper/022:30:240
227797099581,52cyclictest2281858-21df19:30:170
227797099579,36cyclictest0-21swapper/021:30:150
2277970995729,26cyclictest20950irq/209-8000000.ethernet21:45:290
227797099571,8cyclictest2319721-21meminfo23:10:270
2277970995710,9cyclictest2309915-21sh22:15:000
2277970995628,24cyclictest20950irq/209-8000000.ethernet00:35:010
2277970995628,24cyclictest20950irq/209-8000000.ethernet00:35:010
2277970995619,28cyclictest0-21swapper/022:15:330
2277970995614,36cyclictest20950irq/209-8000000.ethernet21:35:260
2277970995614,34cyclictest20950irq/209-8000000.ethernet19:50:290
227797099556,11cyclictest2316625-21unixbench_singl22:50:310
2277970995529,20cyclictest2293330-21ps20:35:280
2277970995513,33cyclictest0-21swapper/020:10:290
227797099551,2cyclictest0-21swapper/021:30:010
2277970995511,33cyclictest0-21swapper/020:20:020
227797099543,8cyclictest2278659-21grep19:10:280
227797099543,12cyclictest2282839-21sh19:35:220
2277970995341,6cyclictest19950irq/27-20000000.i2c20:25:290
227797099533,6cyclictest2329796-21latency_hist00:10:020
2277970995330,18cyclictest20950irq/209-8000000.ethernet00:25:210
2277970995322,27cyclictest0-21swapper/022:40:190
2277973995238,11cyclictest2324380-21munin-plugin-st23:40:001
227797099524,8cyclictest2301151-21head21:20:330
227797099524,11cyclictest2334654-21sed00:35:290
227797099523,6cyclictest2297355-21cut21:00:230
227797099522,9cyclictest2332123-21grep00:20:280
227797099522,9cyclictest2327826-21tail23:55:290
227797099522,7cyclictest2321719-21grep23:20:300
227797099521,41cyclictest2324659-21latency_hist23:40:010
227797099521,11cyclictest2295286-21cron20:50:000
227797099513,7cyclictest2325253-21grep23:40:270
227797099511,8cyclictest2329921-21fschecks_count00:10:210
227797099506,7cyclictest0-21swapper/022:35:300
227797099504,6cyclictest2322222-21tune2fs23:25:210
227797099503,11cyclictest2304570-21unixbench_multi21:40:290
2277974994940,4cyclictest2321879-21apt-key23:25:002
227797099493,6cyclictest2327034-21grep23:50:300
227797099493,6cyclictest2327034-21grep23:50:300
2277973994824,14cyclictest231ktimers/119:10:011
2277973994824,14cyclictest231ktimers/119:10:011
227797099483,9cyclictest2318339-21sed23:00:280
2277970994827,17cyclictest0-21swapper/019:10:010
2277970994827,17cyclictest0-21swapper/019:10:010
2277970994816,3cyclictest0-21swapper/019:45:070
2277970994815,30cyclictest131ktimers/021:50:240
2277973994735,6cyclictest0-21swapper/123:25:001
227797099472,7cyclictest2287893-21lsblk20:05:230
227797099472,6cyclictest2315733-21grep22:45:300
2277974994626,11cyclictest2316039-21/usr/sbin/munin22:50:222
227797099463,8cyclictest2318991-21ptp4l23:05:260
227797099462,12cyclictest2279442-21fschecks_time19:15:230
2277974994529,12cyclictest0-21swapper/220:30:002
2277974994427,11cyclictest311ktimers/219:10:122
227797499441,39cyclictest0-21swapper/221:45:012
2277973994431,8cyclictest0-21swapper/122:50:001
2277973994429,8cyclictest0-21swapper/123:15:291
2277973994429,10cyclictest0-21swapper/119:45:331
2277974994330,9cyclictest0-21swapper/219:40:002
2277973994331,6cyclictest0-21swapper/120:00:311
2277974994226,12cyclictest311ktimers/219:45:192
2277974994222,10cyclictest30-21rcuc/223:20:022
2277973994230,8cyclictest0-21swapper/121:50:321
2277973994228,10cyclictest0-21swapper/120:35:211
2277974994131,7cyclictest0-21swapper/222:05:302
2277974994120,16cyclictest311ktimers/200:20:132
227797499411,10cyclictest0-21swapper/223:50:022
227797499411,10cyclictest0-21swapper/223:50:012
2277973994133,5cyclictest2277967-21cyclictest20:25:001
2277974994027,8cyclictest311ktimers/220:55:122
2277974994027,8cyclictest311ktimers/220:55:122
2277974994027,8cyclictest0-21swapper/223:55:292
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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