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2026-08-03 - 05:36

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 Mon Aug 03, 2026 00:43:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3436301995851,5cyclictest3587827-21sh00:20:010
3436302995645,6cyclictest3490805-21munin-run21:40:011
3436303995547,3cyclictest0-21swapper/200:40:012
3436302995548,4cyclictest0-21swapper/122:15:421
3436303995145,3cyclictest0-21swapper/221:40:012
343630299516,33cyclictest3570933-21ssh23:50:581
3436302995039,7cyclictest3567680-21awk23:45:501
3436302995039,7cyclictest3480215-21unixbench_singl21:21:031
3436303994734,5cyclictest0-21swapper/222:16:012
343630199472,38cyclictest1727787-21cups-browsed22:05:560
3436303994637,5cyclictest1003-21mta-sts-daemon00:00:522
343630399462,32cyclictest3567662-21ssh23:45:492
3436302994637,5cyclictest3472280-21cron21:10:011
3436303994536,6cyclictest421-21dbus-daemon23:25:012
3436303994536,6cyclictest421-21dbus-daemon23:25:012
3436303994531,11cyclictest3574160-21timerandwakeup23:56:012
3436303994531,11cyclictest3574160-21timerandwakeup23:56:012
3436302994534,7cyclictest1-21systemd22:05:021
3436301994534,8cyclictest151ktimers/000:05:580
3436302994433,7cyclictest421-21dbus-daemon19:20:481
3436301994437,4cyclictest3445318-21systemd-run19:40:010
343630199442,33cyclictest3588895-21ssh00:20:470
3436303994334,6cyclictest3547102-21grep23:11:042
3436303994231,8cyclictest3500845-21if_wlan021:55:482
3436301994236,3cyclictest3560983-21aten_r2power_cu23:35:400
3436301994234,6cyclictest3575727-21cups-browsed00:15:010
3436301994215,18cyclictest3540602-21ssh23:00:550
3436303994118,15cyclictest341rcuc/222:55:582
3436303994032,5cyclictest3449806-21systemd-run19:55:012
3436303994021,6cyclictest171rcu_preempt23:35:532
3436302994034,3cyclictest0-21swapper/123:20:491
3436302994034,3cyclictest0-21swapper/123:20:491
3436302994030,5cyclictest3589585-21vmstat00:21:021
3436302994029,8cyclictest3497377-21acpi21:50:391
3436301994026,3cyclictest0-21swapper/021:00:010
3436301994021,16cyclictest3490805-21munin-run21:40:010
343630399393,26cyclictest3588967-21ssh00:20:512
3436302993930,5cyclictest439-21systemd-logind19:30:011
3436302993930,5cyclictest3516287-21ntp_kernel_err22:20:501
3436302993928,7cyclictest420-21avahi-daemon23:19:571
3436301993932,5cyclictest3457276-21cron20:20:000
3436301993930,6cyclictest3559177-21tail23:31:020
3436301993930,6cyclictest3486368-21unixbench_multi21:31:030
3436301993923,9cyclictest12650irq/32-eth022:10:590
3436303993831,4cyclictest3507172-21needreboot22:05:522
3436303993830,5cyclictest3533311-21cron22:50:012
3436302993829,6cyclictest3510498-21mailstats22:11:021
3436302993825,10cyclictest3452840-21latency_hist20:05:021
3436301993830,5cyclictest12750irq/33-eth023:45:500
3436301993829,5cyclictest3501709-21unixbench_multi21:56:060
3436301993817,14cyclictest12650irq/32-eth023:50:540
3436303993729,5cyclictest3587805-21idleruntime-cro00:20:012
3436303993729,5cyclictest3466310-21systemd-run20:50:012
3436303993728,5cyclictest1000-21mta-sts-daemon21:47:022
3436303993727,7cyclictest421-21dbus-daemon21:20:012
3436303993727,6cyclictest3579789-21needreboot00:05:502
3436303993726,7cyclictest3592203-21mailstats00:26:022
3436303993723,10cyclictest3492285-21switchtime21:41:012
3436302993729,5cyclictest3584761-21cron00:15:001
3436302993729,5cyclictest3461781-21cron20:35:011
3436302993729,5cyclictest0-21swapper/121:50:011
3436302993728,7cyclictest3503077-21sh22:00:021
3436302993728,6cyclictest265-21systemd-journal00:40:011
3436302993726,6cyclictest0-21swapper/122:35:431
343630299372,30cyclictest3476512-21ssh21:15:501
343630199379,9cyclictest3577498-21ssh00:01:060
343630199378,9cyclictest3528482-21ntp_states22:40:540
343630199378,8cyclictest3476522-21ntpq21:15:500
3436301993731,4cyclictest3575690-21sendmail-msp00:00:010
3436301993731,4cyclictest3575690-21sendmail-msp00:00:010
3436301993724,8cyclictest3472289-21diskmemload23:40:500
343630199372,32cyclictest3498037-21ssh21:50:500
3436303993628,5cyclictest3540979-21timerwakeupswit23:01:022
3436303993622,7cyclictest0-21swapper/222:50:502
343630399362,26cyclictest3473457-21ssh21:10:512
3436302993628,5cyclictest3566592-21systemd-run23:45:011
3436302993628,5cyclictest3545430-21systemd-run23:10:011
3436302993627,5cyclictest3457340-21latency_hist20:20:011
343630199368,8cyclictest3484020-21ssh21:28:070
343630199368,7cyclictest3437196-21ntpq19:10:520
343630199368,10cyclictest3598017-21ntpq00:35:530
343630199367,12cyclictest3546638-21ntpq23:10:560
343630199366,10cyclictest3594953-21ntpq00:30:500
3436301993627,6cyclictest3493868-21cron21:45:010
3436301993625,8cyclictest3463284-21cat20:40:010
3436301993621,12cyclictest3470788-21cron21:05:010
343630199361,27cyclictest3516503-21ssh22:20:590
3436303993528,4cyclictest3518365-21latency_hist22:25:022
3436303993528,4cyclictest1003-21mta-sts-daemon22:12:092
3436303993527,5cyclictest3499982-21sh21:55:012
3436303993525,6cyclictest3485778-21ssh21:30:522
3436302993525,6cyclictest420-21avahi-daemon21:43:331
3436302993524,5cyclictest0-21swapper/121:10:501
3436302993512,15cyclictest421-21dbus-daemon00:00:511
343630199358,8cyclictest3551129-21ssh23:19:030
3436301993528,4cyclictest3442193-21unixbench_multi19:26:020
3436301993526,6cyclictest1727784-21cupsd22:51:510
343630199351,30cyclictest3555787-21sh23:25:570
343630199351,30cyclictest3555787-21sh23:25:570
3436303993427,4cyclictest3445295-21basename19:40:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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