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2026-07-11 - 04:11

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 Sat Jul 11, 2026 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
997921100,2sleep20-21swapper/222:23:292
997921100,2sleep20-21swapper/222:23:292
997921100,2sleep20-21swapper/222:23:292
21712960,3sleep02174-21grep20:33:400
21712960,3sleep02174-21grep20:33:400
177832740,2chrt17784-21unixbench_singl19:48:420
177832740,2chrt17784-21unixbench_singl19:48:420
261152660,3chrt0-21swapper/021:38:370
261152660,3chrt0-21swapper/021:38:370
261152660,3chrt0-21swapper/021:38:370
219322640,3chrt21935-21wc20:03:170
219322640,3chrt21935-21wc20:03:170
3815995347,4cyclictest15525-21sort00:03:340
3815995347,4cyclictest15525-21sort00:03:340
174672530,1chrt0-21swapper/000:08:360
174672530,1chrt0-21swapper/000:08:360
174672530,1chrt0-21swapper/000:08:360
66372510,3sleep20-21swapper/223:38:392
66372510,3sleep20-21swapper/223:38:392
15972470,3sleep10-21swapper/120:33:341
15972470,3sleep10-21swapper/120:33:341
97352460,3chrt0-21swapper/319:28:353
97352460,3chrt0-21swapper/319:28:353
223192460,2sleep00-21swapper/021:28:370
223192460,2sleep00-21swapper/021:28:370
223192460,2sleep00-21swapper/021:28:370
381599442,34cyclictest15319-21awk00:03:320
381599442,34cyclictest15319-21awk00:03:320
256632440,2sleep20-21swapper/220:13:172
256632440,2sleep20-21swapper/220:13:172
86052430,2sleep20-21swapper/220:53:282
381699423,28cyclictest14776-21latency_hist00:03:251
381699423,28cyclictest14776-21latency_hist00:03:251
381699423,28cyclictest14776-21latency_hist00:03:251
3072420,2sleep30-21swapper/321:58:263
3072420,2sleep30-21swapper/321:58:263
3815993728,7cyclictest27675-21threads23:08:390
3815993728,7cyclictest27675-21threads23:08:390
3815993728,7cyclictest27675-21threads23:08:390
3816993629,5cyclictest1-21systemd21:43:171
3816993629,5cyclictest1-21systemd21:43:171
3816993629,5cyclictest1-21systemd21:43:171
3816993528,5cyclictest26445-21gltestperf00:33:321
3815993528,5cyclictest3808-21cyclictest21:13:380
221442350,3sleep20-21swapper/222:53:402
221442350,3sleep20-21swapper/222:53:402
221442350,3sleep20-21swapper/222:53:402
3815993422,4cyclictest181rcu_preempt22:33:140
3815993422,4cyclictest181rcu_preempt22:33:140
3815993422,4cyclictest181rcu_preempt22:33:140
11542340,3sleep30-21swapper/323:24:003
11542340,3sleep30-21swapper/323:24:003
55882330,3sleep0201rcuc/023:38:290
55882330,3sleep0201rcuc/023:38:290
381899332,23cyclictest14761-21chrt00:03:232
381899332,23cyclictest14761-21chrt00:03:232
381899332,23cyclictest14761-21chrt00:03:232
3816993328,3cyclictest1497-21latency_hist23:28:171
3816993328,3cyclictest1497-21latency_hist23:28:171
3816993327,4cyclictest4985-21grep20:43:311
3816993327,4cyclictest4985-21grep20:43:311
381599339,5cyclictest171ktimers/000:33:370
381599339,5cyclictest171ktimers/000:33:370
3815993326,5cyclictest550-21cron21:23:180
3815993326,5cyclictest550-21cron21:23:180
3815993320,3cyclictest90-1pr/ttyS020:10:150
3815993320,3cyclictest90-1pr/ttyS020:10:150
3815993319,3cyclictest90-1pr/ttyS000:29:520
3815993319,3cyclictest90-1pr/ttyS000:29:520
3815993217,4cyclictest90-1pr/ttyS020:38:570
3815993217,4cyclictest90-1pr/ttyS020:38:570
3815993216,4cyclictest181rcu_preempt23:35:010
3815993210,11cyclictest16-21ksoftirqd/023:28:430
3815993210,11cyclictest16-21ksoftirqd/023:28:430
3815993210,11cyclictest16-21ksoftirqd/023:28:430
382499311,23cyclictest14771-21chrt00:03:243
382499311,23cyclictest14771-21chrt00:03:243
382499311,23cyclictest14771-21chrt00:03:243
3816993126,4cyclictest9210-21ntp_offset20:53:351
3816993126,4cyclictest9210-21ntp_offset20:53:351
3816993126,4cyclictest9210-21ntp_offset20:53:351
3816993125,5cyclictest22327-21needreboot21:28:361
3816993125,5cyclictest22327-21needreboot21:28:361
3816993125,5cyclictest22327-21needreboot21:28:361
3816993123,6cyclictest550-21cron19:43:291
3816993123,6cyclictest550-21cron19:43:291
3816993123,5cyclictest25666-21cron20:13:181
3816993123,5cyclictest25666-21cron20:13:181
3815993126,3cyclictest8731-21gltestperf20:53:290
3815993126,3cyclictest8731-21gltestperf20:53:290
3815993126,3cyclictest8731-21gltestperf20:53:290
3815993124,5cyclictest545-21in:imuxsock19:56:590
3815993124,5cyclictest545-21in:imuxsock19:56:590
3815993124,5cyclictest545-21in:imuxsock19:56:590
3815993124,5cyclictest29860-21cpu00:43:290
3815993124,5cyclictest29860-21cpu00:43:290
3815993123,6cyclictest8260-21gltestperf22:18:310
3815993123,6cyclictest8260-21gltestperf22:18:310
3815993123,6cyclictest32527-21gltestperf23:23:310
3815993123,6cyclictest32527-21gltestperf23:23:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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