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2026-04-07 - 16:40

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 Tue Apr 07, 2026 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
189131995643,10cyclictest303928-21/usr/sbin/munin10:45:280
189133995445,5cyclictest0-21swapper/210:05:352
18913399482,35cyclictest328956-21ssh11:15:402
18913399477,33cyclictest242543-21ssh09:30:302
18913399477,33cyclictest242543-21ssh09:30:302
189132994729,12cyclictest0-21swapper/110:35:371
18913399465,33cyclictest250905-21sh09:40:352
189133994638,4cyclictest0-21swapper/211:20:302
18913299462,38cyclictest283718-21ssh10:20:321
189131994620,22cyclictest12450irq/33-eth009:25:330
189133994538,3cyclictest0-21swapper/212:35:282
189133994537,4cyclictest0-21swapper/207:55:252
189132994535,6cyclictest327842-21latency_hist11:15:021
189131994532,6cyclictest3521708-21cups-browsed10:05:400
189133994231,6cyclictest247146-21grep09:35:442
18913399422,33cyclictest337118-21ssh11:25:372
189132994227,11cyclictest261-21systemd-journal10:10:481
189132994215,8cyclictest421-21dbus-daemon11:55:021
189131994236,4cyclictest347977-21ssh11:40:010
189131994225,10cyclictest12350irq/32-eth010:50:300
189133994131,6cyclictest388701-21latency_hist12:30:032
189132994133,5cyclictest421-21dbus-daemon09:20:011
189132994133,5cyclictest210161-21sendmail-msp08:20:011
189132994131,6cyclictest420-21avahi-daemon12:23:581
189131994133,5cyclictest1-21systemd12:25:010
189131994127,11cyclictest202957-40mandb07:55:230
189131994125,13cyclictest221497-21ntpq08:55:310
189133994029,7cyclictest420-21avahi-daemon10:48:352
189133994027,8cyclictest325107-21timerandwakeup11:10:422
18913399402,27cyclictest316632-21ssh11:00:372
18913399402,27cyclictest316632-21ssh11:00:372
18913299408,27cyclictest353391-21ssh11:45:401
189132994032,5cyclictest189142-21systemd-run07:10:011
189132994032,5cyclictest189142-21systemd-run07:10:011
189132994031,6cyclictest421-21dbus-daemon11:15:431
189132994031,6cyclictest348011-21tr11:40:011
189132994031,6cyclictest335872-21latency_hist11:25:011
189132994031,4cyclictest0-21swapper/110:40:361
189131994034,4cyclictest380428-21systemd-run12:20:010
189131994034,3cyclictest0-21swapper/009:15:450
189133993933,3cyclictest0-21swapper/212:00:012
189133993931,5cyclictest695-21cron09:25:012
189133993931,5cyclictest368269-21ssh12:05:002
189133993931,5cyclictest211659-21systemd-run08:25:012
18913399392,28cyclictest353149-21ssh11:45:322
189132993932,4cyclictest0-21swapper/109:25:011
189132993931,5cyclictest376347-21munin-run12:15:011
189132993931,5cyclictest282607-21ssh10:20:021
189131993933,4cyclictest360151-21grep11:55:010
189131993932,4cyclictest225136-21cut09:10:000
189131993930,6cyclictest420-21avahi-daemon09:32:590
189131993930,6cyclictest420-21avahi-daemon09:32:590
189131993930,6cyclictest257221-21ssh09:48:490
189131993928,8cyclictest278450-21cron10:15:010
189131993925,11cyclictest261269-21ssh09:53:400
18913199392,31cyclictest250954-21ssh09:40:370
189132993831,3cyclictest0-21swapper/111:45:011
189132993827,9cyclictest3521708-21cups-browsed11:35:011
189131993830,5cyclictest352067-21ssh11:45:010
189131993825,11cyclictest228526-21ssh09:13:440
189131993825,10cyclictest268140-21ssh10:01:030
189131993822,14cyclictest319148-21ssh11:04:300
189131993822,14cyclictest319148-21ssh11:04:300
189131993822,12cyclictest297374-21ssh10:37:010
189133993731,3cyclictest0-21swapper/211:35:212
189133993729,5cyclictest270460-21latency_hist10:05:022
189133993729,4cyclictest266163-21kworker/u8:0+xprtiod10:00:012
189133993727,7cyclictest296670-21unixbench_singl10:35:472
18913399372,30cyclictest275563-21ssh10:10:342
189132993729,5cyclictest223652-21systemd-run09:05:011
189132993726,8cyclictest1055-21mta-sts-daemon11:56:071
189132993711,8cyclictest253519-21sh09:44:331
189132993710,10cyclictest246640-21ld09:35:321
189131993729,6cyclictest335225-21ssh11:23:510
189131993729,4cyclictest0-21swapper/010:55:370
189131993727,8cyclictest375692-21ssh12:13:460
189131993727,8cyclictest352290-21ssh11:45:030
189131993726,8cyclictest421-21dbus-daemon11:35:010
189131993726,8cyclictest388325-21ssh12:29:420
189131993725,10cyclictest247912-21ssh09:36:470
18913199371,30cyclictest283792-21ssh10:20:340
189133993626,6cyclictest284390-21unixbench_singl10:20:442
189133993623,9cyclictest389504-21missed_timers12:30:282
189132993628,5cyclictest274340-21cron10:10:011
189132993627,6cyclictest659-21snmpd08:35:321
189132993627,6cyclictest376952-21aten2.4-expect12:15:241
189132993611,4cyclictest1055-21mta-sts-daemon07:55:321
189132993610,10cyclictest311125-21sh10:54:471
189131993627,5cyclictest198979-21ntpq07:40:310
189131993626,8cyclictest329921-21ssh11:16:360
189131993626,8cyclictest292785-21ssh10:31:030
189131993626,8cyclictest264374-21ssh09:56:450
189131993626,7cyclictest189143-21/usr/sbin/munin07:10:010
189131993626,7cyclictest189143-21/usr/sbin/munin07:10:010
189131993623,10cyclictest369303-21ssh12:05:290
189131993623,10cyclictest322301-21ssh11:07:410
189133993527,5cyclictest373748-21systemctl12:10:432
189132993511,7cyclictest391705-21sh12:33:271
189132993510,7cyclictest199790-21latency_hist07:45:021
189131993527,6cyclictest364213-21sendmail12:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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