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2026-06-22 - 11:36

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 Jun 22, 2026 00:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2265599646,50cyclictest149003-21ssh23:35:370
2265599646,50cyclictest149003-21ssh23:35:370
22657995244,5cyclictest31658-21awk19:40:012
2265799492,32cyclictest109098-21ssh22:30:362
22655994938,7cyclictest12650irq/32-eth022:40:330
22657994835,9cyclictest421-21dbus-daemon19:50:372
22655994836,6cyclictest55603-21kworker/u8:3-xprtiod21:10:320
22655994836,6cyclictest55603-21kworker/u8:3-xprtiod21:10:320
22655994726,14cyclictest12650irq/32-eth022:55:320
22657994535,7cyclictest2465353-21cups-browsed21:30:582
2265599453,37cyclictest152019-21ssh23:40:320
2265599453,37cyclictest152019-21ssh23:40:320
22657994335,5cyclictest92595-21ssh22:05:012
22655994337,4cyclictest151ktimers/019:25:340
22655994331,6cyclictest92444-21kworker/u8:2-rpciod22:07:160
22655994331,6cyclictest0-21swapper/021:00:300
22655994331,6cyclictest0-21swapper/021:00:300
22657994235,4cyclictest65403-21cpuspeed21:20:232
22657994234,5cyclictest163128-21ssh00:00:012
22657994233,6cyclictest420-21avahi-daemon23:25:432
22656994233,5cyclictest72493-21timerwakeupswit21:30:401
22656994233,5cyclictest0-21swapper/122:10:311
22655994233,6cyclictest2465330-21cupsd23:34:310
22655994230,8cyclictest12650irq/32-eth021:25:350
22657994130,8cyclictest115083-21missed_timers22:40:262
22655994132,6cyclictest2564995-21munin-node21:55:170
22655994131,6cyclictest0-21swapper/023:00:290
22655994114,19cyclictest421-21dbus-daemon22:25:360
22657994032,5cyclictest37627-21grep20:00:012
22657994032,5cyclictest135730-21grep23:15:012
2265699404,5cyclictest171rcu_preempt23:30:321
22656994033,4cyclictest141835-21sh23:25:011
22656994032,4cyclictest0-21swapper/122:55:311
22656994030,6cyclictest2465353-21cups-browsed23:05:171
22655994027,10cyclictest0-21swapper/020:35:010
2265599402,30cyclictest72146-21ssh21:30:330
2265599402,30cyclictest136714-21ssh23:15:270
22657993931,5cyclictest58634-21diskmemload21:10:242
22657993931,5cyclictest58634-21diskmemload21:10:242
22657993931,5cyclictest34523-21unixbench_multi19:45:412
22657993921,14cyclictest351ktimers/222:25:272
22656993930,5cyclictest75024-21missed_timers21:35:311
22655993934,3cyclictest163132-21cron00:00:000
22655993932,4cyclictest64824-21idleruntime-cro21:20:000
22655993929,7cyclictest2465353-21cups-browsed22:34:570
22655993926,10cyclictest90606-21ntp_offset22:00:320
22656993829,7cyclictest0-21swapper/121:40:351
22657993730,3cyclictest0-21swapper/221:00:302
22657993730,3cyclictest0-21swapper/221:00:302
22656993729,5cyclictest36128-21cron19:55:011
22655993732,3cyclictest151ktimers/000:25:310
22655993730,4cyclictest41165-21fschecks_time20:10:220
22655993728,6cyclictest421-21dbus-daemon22:38:370
22655993721,13cyclictest694-21cron20:55:010
22657993629,4cyclictest187427-21ssh00:40:012
22657993628,4cyclictest0-21swapper/220:35:332
22656993629,4cyclictest175251-21munin-plugin-st00:20:011
22656993623,6cyclictest0-21swapper/122:45:371
2265599368,10cyclictest14-21ksoftirqd/023:55:010
2265599368,10cyclictest14-21ksoftirqd/023:55:010
22655993627,6cyclictest420-21avahi-daemon21:49:350
22655993626,6cyclictest12650irq/32-eth023:05:310
22655993625,8cyclictest172265-21cron00:15:010
22655993616,15cyclictest76697-21kworker/u8:3+rpciod00:00:360
2265599361,3cyclictest0-21swapper/000:05:330
22657993528,4cyclictest1001-21mta-sts-daemon22:56:532
22657993527,5cyclictest114375-21latency_hist22:40:032
22656993529,3cyclictest0-21swapper/100:00:001
22656993528,4cyclictest1-21systemd19:35:011
22656993525,7cyclictest1-21systemd19:10:011
22656993525,4cyclictest0-21swapper/120:45:271
22656993523,5cyclictest1002-21mta-sts-daemon22:00:401
2265599354,14cyclictest14-21ksoftirqd/021:35:330
22655993528,4cyclictest45220-21latency_hist20:25:020
22655993526,6cyclictest2465353-21cups-browsed22:50:000
22655993526,6cyclictest120695-21aten2.4-expect22:50:200
22655993523,9cyclictest35148-21fschecks_count19:50:270
22657993426,5cyclictest58635-21munin-run21:10:002
22657993426,5cyclictest58635-21munin-run21:10:002
22657993425,5cyclictest122488-21kworker/u8:5+xprtiod23:40:012
22657993425,5cyclictest122488-21kworker/u8:5+xprtiod23:40:012
2265799341,23cyclictest62838-21ssh21:15:342
22656993428,4cyclictest150958-21ssh23:40:011
22656993428,4cyclictest150958-21ssh23:40:011
22656993428,3cyclictest0-21swapper/121:20:001
22656993428,3cyclictest0-21swapper/100:40:011
22656993426,5cyclictest114147-21cron22:40:011
22656993424,7cyclictest108746-21if_wlan022:30:281
22656993424,7cyclictest1002-21mta-sts-daemon21:10:341
22656993424,7cyclictest1002-21mta-sts-daemon21:10:341
22656993423,9cyclictest65739-21missed_timers21:20:301
2265699342,28cyclictest179390-21ssh00:25:321
2265599343,23cyclictest102891-21ssh22:20:290
22655993426,5cyclictest2465353-21cups-browsed22:18:490
22655993426,5cyclictest144915-21latency_hist23:30:020
22655993424,5cyclictest58659-21systemd-run21:10:010
22655993424,5cyclictest58659-21systemd-run21:10:010
2265599342,26cyclictest265-21systemd-journal19:15:310
22655993412,4cyclictest191rcuc/020:00:010
22657993328,2cyclictest0-21swapper/223:50:382
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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