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2026-07-29 - 06:41

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 29, 2026 00:43:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2588658995334,9cyclictest2726644-21sh23:55:480
2588658995237,11cyclictest0-21swapper/023:35:490
258866099518,8cyclictest2624647-21diskmemload21:50:532
2588658995131,16cyclictest2693403-21switchtime23:01:010
2588659995038,7cyclictest843869-21cups-browsed22:52:391
2588659995022,21cyclictest843869-21cups-browsed21:45:521
2588659994941,5cyclictest2621632-21cron21:00:011
258866099484,41cyclictest2634998-21ssh21:25:472
2588658994810,34cyclictest2641167-21ssh21:35:490
2588660994736,7cyclictest1-21systemd00:00:012
2588658994724,16cyclictest12650irq/32-eth000:15:580
2588660994635,7cyclictest843869-21cups-browsed23:25:222
2588660994635,7cyclictest843869-21cups-browsed23:25:222
2588659994630,11cyclictest420-21avahi-daemon00:39:201
2588659994537,5cyclictest2695696-21fschecks_time23:05:441
2588659994537,4cyclictest0-21swapper/122:30:541
2588659994537,4cyclictest0-21swapper/122:30:541
2588659994536,5cyclictest1003-21mta-sts-daemon22:03:361
2588660994436,5cyclictest2615642-21grep20:40:002
2588660994436,5cyclictest2615642-21grep20:40:002
2588660994433,7cyclictest420-21avahi-daemon21:48:482
258866099442,33cyclictest2741750-21ssh00:20:482
2588659994435,5cyclictest2623228-21latency_hist21:05:021
2588660994332,8cyclictest1-21systemd00:30:022
258865999435,32cyclictest2662580-21ssh22:10:461
2588659994335,5cyclictest0-21swapper/100:00:011
2588658994336,4cyclictest2730189-21timerandwakeup00:01:090
2588660994234,5cyclictest2655348-21cron22:00:012
2588659994233,6cyclictest0-21swapper/121:20:001
2588658994234,5cyclictest2732044-21aten_r2power_cu00:05:410
2588660994032,5cyclictest2677222-21aten2.4-expect22:35:372
2588660994029,8cyclictest2667505-21latency_hist22:20:022
2588660994029,7cyclictest420-21avahi-daemon00:19:502
2588660994029,7cyclictest2695516-21aten_r2power_po23:05:412
2588659994032,5cyclictest2617185-21latency_hist20:45:011
2588658994032,5cyclictest1-21systemd20:30:010
2588658994032,5cyclictest1-21systemd20:30:010
2588658994031,6cyclictest2691864-21ssh23:00:010
2588658994031,5cyclictest151ktimers/019:30:500
2588658994025,4cyclictest0-21swapper/019:50:010
2588658994025,4cyclictest0-21swapper/019:50:010
2588660993931,5cyclictest0-21swapper/222:00:502
2588659993930,5cyclictest2711894-21unixbench_multi23:31:011
2588659993930,5cyclictest2711894-21unixbench_multi23:31:011
2588659993929,6cyclictest487-21rs:main1
2588658993934,3cyclictest2599156-21grep19:45:000
2588658993932,4cyclictest1002-21mta-sts-daemon21:25:580
2588658993928,7cyclictest2741661-21missed_timers00:20:460
2588658993926,4cyclictest2620789-21kernelversion20:55:450
2588658993926,10cyclictest0-21swapper/022:25:010
2588658993924,3cyclictest171rcu_preempt22:30:550
2588658993924,3cyclictest171rcu_preempt22:30:550
2588658993924,12cyclictest0-21swapper/022:00:010
2588660993830,5cyclictest2736214-21timerwakeupswit00:11:002
2588660993830,5cyclictest2736214-21timerwakeupswit00:11:002
2588660993829,6cyclictest421-21dbus-daemon23:20:012
2588659993829,6cyclictest421-21dbus-daemon00:10:011
2588659993829,6cyclictest420-21avahi-daemon21:24:081
258865999382,27cyclictest2741968-21ssh00:20:581
2588658993831,4cyclictest2698162-21latency_hist23:10:030
2588658993829,6cyclictest2745010-21sendmail_mailst00:25:570
2588658993829,6cyclictest2591735-21latency_hist19:20:020
258865899381,33cyclictest2686987-21sh22:50:540
2588660993730,4cyclictest2685859-21latency_hist22:50:022
2588660993728,5cyclictest2752691-21ssh00:40:002
2588660993727,6cyclictest843865-21cupsd22:53:132
2588659993731,3cyclictest0-21swapper/120:20:011
2588659993730,4cyclictest0-21swapper/123:15:011
2588659993729,5cyclictest2610000-21aten_r2power_fr20:20:371
2588659993728,6cyclictest2744523-21kernelversion00:25:441
2588659993728,4cyclictest0-21swapper/121:55:551
258865899374,24cyclictest665-21snmpd22:35:500
2588658993728,6cyclictest2617143-21cron20:45:000
2588658993725,9cyclictest2624651-21grep21:10:010
2588658993723,3cyclictest0-21swapper/023:46:030
258865899372,29cyclictest2735735-21ssh00:10:480
258865899372,29cyclictest2735735-21ssh00:10:480
2588658993721,3cyclictest0-21swapper/021:40:480
2588660993627,6cyclictest265-21systemd-journal19:55:012
2588660993627,6cyclictest2590070-21head19:11:052
2588659993628,6cyclictest2643140-21kworker/u8:5-xprtiod21:45:011
2588659993628,5cyclictest2666282-21unixbench_singl22:16:021
2588659993628,5cyclictest2624674-21systemd-run21:10:021
2588659993626,6cyclictest2747864-21ssh00:30:511
258865899366,8cyclictest14-21ksoftirqd/021:22:290
2588658993629,4cyclictest2609637-21cron20:20:010
2588658993628,5cyclictest843869-21cups-browsed21:53:230
2588658993624,9cyclictest2608025-21tail20:10:590
2588660993527,5cyclictest2617674-21fschecks_count20:45:422
2588660993526,6cyclictest2620440-21aten_r2power_en20:55:402
2588660993525,8cyclictest2613460-21needreboot20:30:452
2588660993525,8cyclictest2613460-21needreboot20:30:452
2588660993524,7cyclictest2707373-21latency_hist23:25:032
2588659993530,2cyclictest0-21swapper/100:20:011
2588659993528,3cyclictest0-21swapper/100:00:441
2588658993528,4cyclictest1002-21mta-sts-daemon22:14:240
2588658993524,6cyclictest14-21ksoftirqd/023:50:520
258866099345,23cyclictest2668756-21ssh22:20:522
258866099344,21cyclictest428-21mta-sts-daemon23:30:542
258866099344,21cyclictest428-21mta-sts-daemon23:30:542
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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