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2026-07-15 - 14:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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.
Unexpectedly long latencies may be caused by SMIs
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 rack2slot7s.osadl.org (updated Wed Jul 15, 2026 12:43:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2355267995140,7cyclictest2504744-21mailstats12:15:492
2355266994939,5cyclictest1559552-21cups-browsed07:30:331
2355266994739,5cyclictest2389777-21systemd-run09:05:021
2355267994432,9cyclictest428-21mta-sts-daemon12:10:302
2355266994436,3cyclictest0-21swapper/109:40:041
2355265994431,10cyclictest2412603-21cron09:45:010
2355266994335,5cyclictest2420028-21sh09:55:521
2355267994234,5cyclictest2459726-21ssh11:00:542
2355266994235,4cyclictest2473144-21ssh11:25:001
2355266994235,4cyclictest1001-21mta-sts-daemon11:44:401
2355266994235,3cyclictest0-21swapper/109:10:431
2355266994234,6cyclictest2489539-21uname11:50:471
2355266994136,3cyclictest0-21swapper/112:20:451
2355266994136,3cyclictest0-21swapper/112:20:451
2355266994133,5cyclictest2497396-21systemd-run12:05:011
2355266994130,8cyclictest2374749-21idleruntime-cro08:15:011
2355265994135,3cyclictest1000-21mta-sts-daemon10:10:520
2355265994135,3cyclictest1000-21mta-sts-daemon10:10:520
2355267994033,4cyclictest2412629-21kworker/u8:12-rpciod10:25:012
235526799392,30cyclictest2498483-21ssh12:05:432
2355266993932,4cyclictest1003-21mta-sts-daemon07:15:401
2355266993931,5cyclictest2437503-21fschecks_count10:25:361
2355266993930,6cyclictest1000-21mta-sts-daemon12:05:511
2355266993928,7cyclictest2510966-21timerandwakeup12:25:541
2355266993928,7cyclictest2510966-21timerandwakeup12:25:541
2355267993832,3cyclictest0-21swapper/212:40:012
2355267993831,4cyclictest2473168-21idleruntime-cro11:25:012
2355267993830,5cyclictest421-21dbus-daemon11:35:012
2355267993829,6cyclictest2417273-21unixbench_multi09:50:552
2355266993830,5cyclictest2486859-21unixbench-2d11:45:531
2355266993830,5cyclictest2400427-21munin-plugin-st09:25:011
2355266993830,5cyclictest2400427-21munin-plugin-st09:25:011
2355266993830,4cyclictest2383776-21kworker/u8:2-rpciod09:50:581
2355266993830,4cyclictest1001-21mta-sts-daemon09:49:141
2355266993829,7cyclictest2459644-21unixbench_multi11:00:521
2355265993832,3cyclictest0-21swapper/008:30:010
2355265993830,5cyclictest2425605-21latency10:05:380
2355267993729,4cyclictest0-21swapper/209:20:482
2355267993729,4cyclictest0-21swapper/209:20:482
2355266993731,3cyclictest0-21swapper/112:00:011
2355266993729,5cyclictest2409548-21sendmail09:40:011
2355266993729,5cyclictest2406499-21idleruntime-cro09:35:001
2355265993712,17cyclictest151ktimers/008:30:380
235526599371,16cyclictest2352524-21kworker/u8:10+rpciod07:40:390
235526799367,24cyclictest2440938-21ssh10:30:412
2355267993628,5cyclictest2480313-21ssh11:35:442
2355267993628,5cyclictest2425140-21aten_r2power_cu10:05:322
2355267993628,5cyclictest2389826-21latency_hist09:05:022
2355267993628,5cyclictest2376249-21munin-plugin-st08:20:012
2355267993628,5cyclictest2368684-21unixbench_singl07:50:562
2355266993630,3cyclictest0-21swapper/110:40:471
2355266993630,3cyclictest0-21swapper/110:35:421
2355266993629,4cyclictest2506453-21munin-run12:20:011
2355266993629,4cyclictest2470100-21ssh11:20:001
2355266993628,5cyclictest2464179-21latency_hist11:10:031
2355266993628,5cyclictest2391250-21munin-run09:10:011
2355266993628,4cyclictest0-21swapper/110:15:491
2355265993630,4cyclictest2500422-21unin-run12:10:020
2355265993627,7cyclictest2397346-21sh09:20:010
2355265993626,7cyclictest2358274-21sendmail07:20:010
2355267993529,3cyclictest0-21swapper/207:15:012
2355267993527,5cyclictest2422386-21fschecks_time10:00:342
2355266993528,4cyclictest2376455-21latency_hist08:20:021
2355266993527,5cyclictest694-21cron11:30:001
2355266993527,5cyclictest2451950-21grep10:50:011
2355266993527,5cyclictest2425698-21missed_timers10:05:391
2355266993527,5cyclictest2397403-21systemd09:20:021
2355265993529,4cyclictest2473231-21latency_hist11:25:020
2355265993529,3cyclictest0-21swapper/011:00:430
2355265993528,4cyclictest2503410-21ssh12:15:010
2355265993528,3cyclictest0-21swapper/009:25:350
2355265993528,3cyclictest0-21swapper/009:25:350
2355265993522,11cyclictest2409548-21sendmail09:40:010
2355267993427,4cyclictest2421673-21munin-run10:00:012
2355266993426,5cyclictest1559552-21cups-browsed07:10:451
2355265993428,4cyclictest2442936-21latency_hist10:35:020
2355265993428,4cyclictest2421886-21latency_hist10:00:030
2355265993428,4cyclictest2371752-21cron08:05:010
2355267993326,4cyclictest2491384-21latency_hist11:55:022
2355267993326,4cyclictest2406478-21kworker/u8:3-nfsiod09:40:012
2355267993325,5cyclictest2395933-21unixbench_multi09:15:532
2355267993324,6cyclictest2439849-21systemd-run10:30:012
2355266993326,4cyclictest2359751-21cron07:25:011
2355266993326,3cyclictest0-21swapper/110:50:371
2355266993324,6cyclictest2455459-21head10:55:331
235526599337,16cyclictest151ktimers/011:45:440
2355265993327,4cyclictest2482292-21latency_hist11:40:020
2355265993323,7cyclictest2462722-21ssh11:05:560
2355265993322,8cyclictest2399019-21grep09:20:540
2355265993322,8cyclictest2399019-21grep09:20:540
2355265993320,7cyclictest12650irq/32-eth012:15:430
235526599331,25cyclictest2492376-21ssh11:55:420
235526599331,24cyclictest2392452-21ssh09:10:460
2355267993224,4cyclictest0-21swapper/208:55:002
2355267993223,5cyclictest2513176-21grep12:30:332
2355267993222,5cyclictest0-21swapper/209:25:432
2355267993222,5cyclictest0-21swapper/209:25:432
2355267993220,8cyclictest2508005-21timerwakeupswit12:20:542
2355267993220,8cyclictest2508005-21timerwakeupswit12:20:542
2355266993225,4cyclictest1002-21mta-sts-daemon12:30:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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