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2026-07-08 - 06:37

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 08, 2026 00:43:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
768842996049,7cyclictest1-21systemd00:35:020
768842995344,6cyclictest771837-21idleruntime-cro19:20:000
768844995143,5cyclictest1-21systemd22:40:022
768843995140,8cyclictest848996-21mailstats22:20:461
768844995043,4cyclictest774847-21kworker/u8:10-xprtiod23:25:402
768844994939,6cyclictest826990-21fschecks_time21:45:312
768844994839,6cyclictest786839-21systemd-run20:10:012
768844994839,3cyclictest0-21swapper/221:55:422
768844994839,3cyclictest0-21swapper/221:55:422
768843994841,3cyclictest0-21swapper/121:15:011
768843994837,7cyclictest855213-21timerandwakeup22:30:541
768842994840,4cyclictest151ktimers/021:35:380
768844994736,5cyclictest0-21swapper/222:00:432
768844994736,5cyclictest0-21swapper/222:00:432
768843994736,6cyclictest1000-21mta-sts-daemon20:55:551
768842994739,5cyclictest817114-21grep21:30:010
76884499465,32cyclictest808944-21ssh21:15:392
768844994638,5cyclictest881168-21systemd23:15:012
768843994637,5cyclictest0-21swapper/121:20:421
768844994538,4cyclictest0-21swapper/223:50:372
768844994534,6cyclictest842520-21needreboot22:10:332
76884499453,31cyclictest915853-21ssh00:10:432
768843994537,5cyclictest873704-21vmstat23:00:511
768843994536,6cyclictest839484-21needreboot22:05:321
768842994534,7cyclictest0-21swapper/021:10:370
768842994526,13cyclictest12650irq/32-eth023:00:420
768843994435,7cyclictest0-21swapper/121:40:281
768843994433,7cyclictest421-21dbus-daemon20:35:011
768843994433,7cyclictest421-21dbus-daemon20:35:011
768842994436,5cyclictest829404-21latency_hist21:50:020
768842994432,8cyclictest151ktimers/022:20:370
768844994332,7cyclictest830960-21unixbench-2d21:50:492
768844994314,6cyclictest171rcu_preempt00:20:352
768844994310,20cyclictest428-21mta-sts-daemon21:05:422
76884399438,6cyclictest0-21swapper/119:10:361
768843994234,5cyclictest785354-21systemd-run20:05:011
768843994233,5cyclictest763654-21kworker/u8:5-xprtiod19:51:511
76884399422,33cyclictest815129-21ssh21:25:391
768842994231,8cyclictest879771-21unixbench_singl23:10:530
768844994133,5cyclictest776347-21systemd-run19:35:022
768844994130,7cyclictest872029-21ssh23:00:022
768844994127,6cyclictest0-21swapper/222:40:402
768844994127,6cyclictest0-21swapper/222:40:402
768843994133,5cyclictest803326-21latency_hist21:05:031
768843994132,4cyclictest1000-21mta-sts-daemon23:08:311
768843994132,4cyclictest1000-21mta-sts-daemon23:08:311
768843994129,10cyclictest899891-21sh23:45:281
768842994132,4cyclictest151ktimers/000:10:450
768844994032,5cyclictest826394-21latency_hist21:45:022
768843994032,5cyclictest773343-21munin-plugin-st19:25:001
768842994029,7cyclictest0-21swapper/022:35:010
768842994029,5cyclictest151ktimers/021:00:380
768844993932,4cyclictest817132-21kthreadd21:30:012
768844993931,5cyclictest908569-21cmp00:00:012
768844993927,7cyclictest894939-21unixbench_multi23:35:502
768843993929,6cyclictest421-21dbus-daemon00:00:311
768843993928,7cyclictest420-21avahi-daemon21:17:131
76884399392,29cyclictest818286-21ssh21:30:421
768842993931,5cyclictest847695-21systemd-run22:20:010
768842993920,11cyclictest151ktimers/020:15:420
76884299391,34cyclictest824286-21ssh21:40:360
768844993829,6cyclictest899441-21systemd-run23:45:012
768844993829,6cyclictest1003-21mta-sts-daemon21:39:092
768844993829,5cyclictest876160-21ntp_kernel_pll_23:05:402
768844993829,5cyclictest876160-21ntp_kernel_pll_23:05:402
768844993826,8cyclictest913195-21timerwakeupswit00:05:482
76884399383,29cyclictest921809-21ssh00:20:341
768843993830,5cyclictest905535-21systemd23:55:021
768843993828,6cyclictest890961-21fschecks_time23:30:311
768843993828,6cyclictest265-21systemd-journal21:52:071
768842993829,6cyclictest151ktimers/000:25:400
768842993828,6cyclictest829761-21telnet21:50:270
768842993826,9cyclictest773331-21cron19:25:000
768844993729,5cyclictest841558-21munin-plugin-st22:10:002
768843993728,6cyclictest884889-21gltestperf23:20:291
768843993727,7cyclictest420-21avahi-daemon22:12:161
76884399371,29cyclictest827353-21ssh21:45:371
768842993731,3cyclictest0-21swapper/023:20:010
768842993730,4cyclictest788310-21cron20:15:010
768842993727,7cyclictest0-21swapper/000:10:010
768842993726,6cyclictest0-21swapper/019:55:510
768844993629,4cyclictest797327-21sh20:45:012
768844993629,3cyclictest0-21swapper/219:30:022
768844993626,6cyclictest875042-21cron23:05:012
76884399363,23cyclictest870065-21sh22:55:431
768843993629,4cyclictest860500-21fschecks_count22:40:301
768843993629,4cyclictest860500-21fschecks_count22:40:301
768843993628,5cyclictest804840-21systemd-run21:10:011
768843993627,6cyclictest926865-21munin-plugin-st00:30:011
768843993625,8cyclictest882623-21timerandwakeup23:15:501
768843993623,10cyclictest261rcuc/120:50:371
768843993619,3cyclictest171rcu_preempt23:10:361
768842993628,5cyclictest567-21gdbus23:25:290
768842993626,7cyclictest1003-21mta-sts-daemon23:50:570
768842993614,14cyclictest12650irq/32-eth022:55:430
76884499353,23cyclictest845685-21sshd22:15:402
768844993528,3cyclictest763654-21kworker/u8:5-nfsiod20:40:012
768844993527,5cyclictest814075-21systemd-run21:25:012
768843993527,5cyclictest930579-21fschecks_time00:35:311
768843993527,5cyclictest930579-21fschecks_time00:35:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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