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2026-08-04 - 23:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Tue Aug 04, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
256125622320,2sleep3575-21kworker/3:2-events11:03:003
256125622320,2sleep3575-21kworker/3:2-events11:03:003
25223932660,6sleep3451irq_work/310:25:003
2326686995447,5cyclictest2627000-21base6412:10:002
25507402510,2chrt291ktimers/110:52:591
24664322510,4chrt0-21swapper/309:27:593
2326686994941,6cyclictest275-21systemd-journal11:10:002
2326679994729,15cyclictest2597030-21latency_hist11:40:010
2326679994641,4cyclictest2358314-21kworker/u8:0+flush-8:007:45:000
2326679994641,4cyclictest2358314-21kworker/u8:0+flush-8:007:45:000
2326679994524,18cyclictest2437919-21latency_hist09:00:010
2326679994413,16cyclictest0-21swapper/009:37:510
2326684994235,5cyclictest2388045-21apt-get08:10:001
2326679994219,20cyclictest2587597-21/usr/sbin/munin11:33:030
2326679994124,15cyclictest2461855-21needreboot09:23:020
2326679994120,19cyclictest2442874-21latency_hist09:05:010
2326679994117,21cyclictest2637029-21latency_hist12:20:000
2326679994117,21cyclictest2637029-21latency_hist12:20:000
2326679994031,6cyclictest2646898-21latency_hist12:30:010
2326686993933,5cyclictest2358314-21kworker/u8:0+flush-8:007:48:102
2326686993933,4cyclictest2398174-21apt-get08:20:002
232667999398,5cyclictest0-21swapper/007:57:550
2326679993912,14cyclictest0-21swapper/008:23:110
2326679993823,13cyclictest2602162-21latency_hist11:45:010
2326679993821,15cyclictest2348110-21unixbench_multi07:28:090
2326679993811,15cyclictest0-21swapper/010:35:270
2326684993728,6cyclictest2592096-21latency_hist11:35:011
2326684993726,8cyclictest275-21systemd-journal09:50:001
2326684993725,8cyclictest275-21systemd-journal10:40:381
2326679993718,17cyclictest2612067-21cron11:55:000
2326679993716,19cyclictest2653640-21cut12:37:580
2326684993631,4cyclictest2388511-21kworker/u8:3+flush-8:008:12:531
2326684993630,4cyclictest2388511-21kworker/u8:3+flush-8:008:23:091
2326684993629,5cyclictest2562667-21kworker/u8:0+events_unbound12:08:061
2326679993624,10cyclictest2482617-21cron09:45:000
2326684993523,9cyclictest2546928-21ntpq10:48:041
2326679993520,13cyclictest2517445-21sendmail10:20:010
232667999351,9cyclictest2456786-21/usr/sbin/munin09:18:020
2326684993429,3cyclictest2553016-21apt-get10:57:481
232667999348,2cyclictest0-21swapper/012:12:540
2326679993426,6cyclictest275-21systemd-journal08:45:000
2326679993426,6cyclictest2452745-21latency_hist09:15:010
2326679993416,16cyclictest0-21swapper/011:07:580
2326679993416,16cyclictest0-21swapper/008:12:500
2326679993416,16cyclictest0-21swapper/008:10:000
2326679993416,15cyclictest2577270-21latency_hist11:20:010
2326679993415,17cyclictest2506487-21kthreadcore10:08:020
2326679993415,17cyclictest0-21swapper/011:48:030
2326679993414,18cyclictest0-21swapper/010:05:010
2326679993414,18cyclictest0-21swapper/007:30:570
232667999341,12cyclictest2413696-21apt-get08:37:510
2326686993327,3cyclictest2499049-21kthreadcore10:02:592
2326684993324,7cyclictest2337736-21ntpq07:18:011
2326679993319,12cyclictest275-21systemd-journal11:30:000
2326679993318,13cyclictest2528510-21fschecks_count10:32:540
2326679993318,13cyclictest0-21swapper/007:37:540
2326679993316,15cyclictest0-21swapper/007:13:090
2326679993315,16cyclictest0-21swapper/012:10:000
2326679993314,17cyclictest2409350-21sort08:32:580
232667999331,3cyclictest2447133-21ntp_states09:08:050
2326684993227,4cyclictest2368258-21kworker/u8:2+flush-8:008:32:561
2326684993227,3cyclictest2374382-21irqrtprio07:57:551
2326684993224,6cyclictest2532752-21latency_hist10:35:011
2326684993223,6cyclictest2447783-21latency_hist09:10:011
232667999329,7cyclictest2337655-21cat07:18:000
232667999326,8cyclictest2493421-21grep09:57:530
232667999325,14cyclictest2544400-21cut10:47:580
232667999323,7cyclictest2368997-21fschecks_count07:52:550
232667999322,9cyclictest2432307-21ntpq08:53:010
232667999322,27cyclictest0-21swapper/007:10:010
2326679993215,15cyclictest851-21mta-sts-daemon08:03:050
2326679993214,16cyclictest0-21swapper/008:17:590
2326679993213,18cyclictest0-21swapper/007:48:100
2326679993212,18cyclictest2578283-21cut11:22:550
232667999321,10cyclictest2466796-21ntpq09:28:010
2326679993210,5cyclictest2559203-21cut11:02:580
2326679993210,5cyclictest2559203-21cut11:02:580
23220782324,10sleep20-21swapper/207:07:412
2326686993122,7cyclictest2601981-21apt-get11:45:002
2326684993123,6cyclictest2289415-21kworker/u8:1+flush-8:007:38:101
2326684993122,7cyclictest2471785-21ntpq09:33:041
2326684993120,8cyclictest275-21systemd-journal09:35:381
232667999316,23cyclictest2551598-21cut10:52:590
232667999311,9cyclictest2618250-21ps12:02:580
232667999311,9cyclictest2526827-21ntpq10:28:020
232667999311,9cyclictest2472048-21python309:33:100
2326679993117,12cyclictest0-21swapper/008:50:000
2326679993113,16cyclictest401-21dbus-daemon10:45:000
23220702313,5sleep10-21swapper/107:07:351
2326684993025,3cyclictest1-21systemd11:45:001
232667999309,3cyclictest0-21swapper/010:12:500
232667999301,9cyclictest2342718-21ntpq07:23:030
2326679993015,13cyclictest2617034-21sh12:00:000
2326679993013,15cyclictest0-21swapper/010:22:540
2326679993011,2cyclictest0-21swapper/010:57:580
2326679993010,7cyclictest2640351-21cut12:22:580
2326686992922,5cyclictest2597024-21ls11:40:012
2326684992923,4cyclictest2437744-21unixbench_singl08:58:091
2326684992923,3cyclictest0-21swapper/108:05:011
2326684992922,5cyclictest2358314-21kworker/u8:0+flush-8:007:47:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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