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2026-05-29 - 22:27

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 Fri May 29, 2026 12:42:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3279499996656,6cyclictest1-21systemd12:21:002
3279499996656,6cyclictest1-21systemd12:21:002
3279498994737,7cyclictest3356269-21awk12:00:011
3279498994638,5cyclictest3304371-21munin-plugin-st09:10:011
3279498994535,4cyclictest0-21swapper/112:21:001
3279498994535,4cyclictest0-21swapper/112:21:001
3279499994331,8cyclictest2555081-21cups-browsed07:40:552
3279499994331,8cyclictest2555081-21cups-browsed07:40:552
3279498994335,5cyclictest3282779-21systemd-run07:25:011
3279499994234,4cyclictest0-21swapper/210:40:002
3279498994232,7cyclictest3349325-21/usr/sbin/munin11:35:531
3279499994131,6cyclictest3326305-21systemd-run10:20:012
3279498994133,5cyclictest3344276-21cut11:20:011
3279499994030,6cyclictest261-21systemd-journal09:47:422
3279499994029,6cyclictest0-21swapper/211:00:012
3279499993932,4cyclictest0-21swapper/212:00:012
3279499993917,13cyclictest3364682-21sshd12:25:582
3279498993932,3cyclictest0-21swapper/109:40:001
3279498993931,5cyclictest601-21gdbus09:47:421
3279497993921,10cyclictest151ktimers/011:51:010
327949999384,24cyclictest3289207-21run-parts08:01:002
327949999384,24cyclictest3289207-21run-parts08:01:002
3279499993827,7cyclictest439-21systemd-logind09:10:012
3279497993831,4cyclictest555-21ModemManager09:46:570
3279499993731,3cyclictest0-21swapper/212:10:582
3279499993731,3cyclictest0-21swapper/212:10:582
3279499993727,6cyclictest420-21avahi-daemon09:41:072
3279499993719,4cyclictest171rcu_preempt08:05:592
3279498993729,5cyclictest3281001-21systemd-run07:15:011
3279497993731,4cyclictest3342789-21systemd-run11:15:020
3279497993721,11cyclictest151ktimers/010:36:000
3279499993629,4cyclictest3318709-21sh09:55:012
3279498993628,5cyclictest3295090-21cron08:35:011
3279497993628,5cyclictest3323245-21systemd-run10:10:010
3279499993525,7cyclictest1-21systemd08:45:022
3279498993529,3cyclictest0-21swapper/109:00:011
3279498993529,3cyclictest0-21swapper/107:40:011
3279498993528,4cyclictest0-21swapper/107:30:011
3279498993525,8cyclictest3333794-21sh10:45:011
3279497993528,4cyclictest3366696-21grep12:31:120
3279497993528,4cyclictest3357771-21cron12:05:000
3279497993528,4cyclictest3296900-21systemd08:45:020
3279499993426,5cyclictest3347296-21systemd-run11:30:012
3279499993425,6cyclictest3339774-21latency_hist11:05:022
3279499993425,6cyclictest1054-21mta-sts-daemon08:50:592
3279499993423,8cyclictest3280380-21ntp_kernel_pll_07:10:592
3279499993422,9cyclictest3321745-21sh10:05:012
3279499993414,7cyclictest36-21ksoftirqd/211:10:592
3279499993413,4cyclictest171rcu_preempt10:26:012
327949899346,9cyclictest171rcu_preempt11:41:051
3279498993426,5cyclictest3347675-21aten_r2power_vo11:30:521
3279498993426,5cyclictest3318737-21systemd-run09:55:021
3279498993426,5cyclictest2555081-21cups-browsed09:41:001
3279497993429,3cyclictest0-21swapper/008:40:010
3279497993427,4cyclictest1054-21mta-sts-daemon11:55:590
3279497993426,5cyclictest2555081-21cups-browsed08:15:490
3279497993426,5cyclictest1-21systemd10:10:170
3279499993326,3cyclictest341rcuc/208:15:012
3279499993323,6cyclictest3293109-21systemd-run08:20:022
3279499993321,3cyclictest171rcu_preempt11:21:022
3279499993319,3cyclictest171rcu_preempt11:31:012
3279499993318,11cyclictest421-21dbus-daemon07:51:022
3279499993318,11cyclictest421-21dbus-daemon07:51:022
3279499993312,16cyclictest421-21dbus-daemon09:56:022
3279498993327,3cyclictest0-21swapper/110:20:011
3279497993327,4cyclictest421-21dbus-daemon10:00:020
3279497993326,4cyclictest3301354-21cut09:00:010
3279497993325,6cyclictest420-21avahi-daemon11:46:070
3279497993324,6cyclictest3295101-21munin-plugin-st08:35:010
3279497993321,9cyclictest3303338-21cpuspeed09:05:510
3279499993224,5cyclictest3344260-21cron11:20:012
3279498993226,3cyclictest0-21swapper/108:00:001
3279498993226,3cyclictest0-21swapper/108:00:001
3279498993224,5cyclictest3364352-21fschecks_time12:25:531
3279498993224,5cyclictest3324771-21idleruntime-cro10:15:011
3279498993223,6cyclictest2555081-21cups-browsed11:01:221
3279498993221,7cyclictest1056-21mta-sts-daemon07:50:591
3279498993221,7cyclictest1056-21mta-sts-daemon07:50:591
3279497993226,4cyclictest3344814-21fschecks_time11:20:530
3279497993224,6cyclictest3326787-21sshd10:20:530
3279497993220,9cyclictest0-21swapper/009:35:520
3279497993220,10cyclictest261-21systemd-journal11:10:000
327949999319,9cyclictest3308328-21ntpq09:21:022
3279499993125,3cyclictest0-21swapper/212:35:022
3279499993123,6cyclictest0-21swapper/207:40:012
3279499993122,4cyclictest3302752-21unixbench_multi09:01:102
3279499993121,6cyclictest3301404-21latency_hist09:00:022
3279499993112,3cyclictest171rcu_preempt07:21:012
3279497993124,4cyclictest3336835-21latency_hist10:55:010
3279497993124,4cyclictest3321802-21latency_hist10:05:020
3279497993122,5cyclictest191rcuc/011:31:020
3279497993121,8cyclictest3310277-21unixbench_multi09:26:110
3279497993121,8cyclictest3310277-21unixbench_multi09:26:110
3279497993117,11cyclictest3363823-21cron12:25:000
3279497993117,11cyclictest3363823-21cron12:25:000
3279499993024,3cyclictest0-21swapper/208:40:012
3279499993023,3cyclictest3311787-21unixbench_singl09:31:122
3279499993023,3cyclictest3311787-21unixbench_singl09:31:122
3279499993021,6cyclictest1-21systemd07:35:012
3279499993021,5cyclictest3368232-21tail12:36:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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