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2026-04-25 - 21:34

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 Sat Apr 25, 2026 12:43:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3188554995850,5cyclictest3385312-21systemd-run12:30:011
3188554995850,5cyclictest3385312-21systemd-run12:30:011
3188553995145,3cyclictest0-21swapper/009:55:340
3188554994940,6cyclictest3233069-21aten_r2power_en09:20:311
3188553994840,6cyclictest2389957-21cups-browsed11:25:420
3188554994638,5cyclictest3325092-21grep11:15:001
3188554994638,5cyclictest3325092-21grep11:15:001
3188554994637,6cyclictest421-21dbus-daemon10:50:011
3188553994638,5cyclictest3250389-21unixbench_multi09:40:540
3188555994536,6cyclictest3361277-21systemd-run12:00:012
3188555994438,3cyclictest0-21swapper/211:40:012
3188555994436,5cyclictest3393336-21systemd-run12:40:012
3188555994435,7cyclictest3209526-21munin-run08:20:002
3188555994435,6cyclictest1-21systemd10:35:022
3188555994435,6cyclictest1-21systemd10:35:022
318855399445,33cyclictest3390522-21ssh12:35:430
3188553994437,5cyclictest0-21swapper/010:20:020
3188555994334,6cyclictest421-21dbus-daemon08:40:012
3188555994232,6cyclictest3256800-21latency_hist09:50:022
3188554994230,8cyclictest3237742-21sh09:25:431
3188553994233,7cyclictest12350irq/32-eth011:39:050
318855599416,30cyclictest3237833-21ssh09:25:462
318855599412,32cyclictest3245752-21ssh09:35:422
3188554994133,5cyclictest1055-21mta-sts-daemon09:50:471
3188554994132,6cyclictest3220031-21systemd-run08:55:011
3188553994136,3cyclictest151ktimers/008:45:470
3188553994133,5cyclictest1055-21mta-sts-daemon11:20:460
3188553994126,12cyclictest3256652-21systemd-run09:50:010
3188555994032,5cyclictest3272900-21latency_hist10:10:022
3188555994032,5cyclictest3224527-21diskmemload12:00:372
3188554994031,5cyclictest3224530-21munin-plugin-st09:10:011
3188553994034,4cyclictest3362683-21proc_pri12:00:500
3188553994034,3cyclictest3244528-21grep09:35:000
3188553994034,3cyclictest3244528-21grep09:35:000
3188553994012,24cyclictest3229848-21ssh09:15:480
3188555993929,6cyclictest421-21dbus-daemon09:52:372
3188553993931,5cyclictest3361263-21idleruntime-cro12:00:000
3188553993931,5cyclictest3286556-21unixbench-2d10:25:550
3188553993930,6cyclictest2389953-21cupsd09:28:360
3188553993925,11cyclictest3385334-21latency_hist12:30:010
3188553993925,11cyclictest3385334-21latency_hist12:30:010
318855399392,34cyclictest420-21avahi-daemon12:11:040
3188553993920,17cyclictest191rcuc/009:35:520
3188555993830,5cyclictest261-21systemd-journal08:30:032
3188555993830,4cyclictest0-21swapper/211:15:462
3188555993827,8cyclictest1-21systemd11:35:022
318855599382,30cyclictest3241853-21ssh09:30:472
318855599382,30cyclictest3241853-21ssh09:30:472
3188554993832,3cyclictest0-21swapper/110:20:011
318855399388,24cyclictest3322421-21ssh11:10:470
318855399388,24cyclictest3322421-21ssh11:10:470
3188553993830,5cyclictest3339035-21vmstat11:30:540
3188553993827,8cyclictest3294946-21sshd10:36:200
318855399382,31cyclictest3265879-21ssh10:00:410
318855399382,31cyclictest3265879-21ssh10:00:410
3188555993729,5cyclictest3337303-21latency_hist11:30:022
3188555993729,5cyclictest0-21swapper/212:10:022
3188555993728,6cyclictest3301537-21aten_r2power_po10:45:322
3188555993725,9cyclictest3230374-21unixbench_singl09:15:562
318855499374,6cyclictest171rcu_preempt10:10:421
318855499373,26cyclictest3282009-21ssh10:20:471
3188554993728,7cyclictest3268743-21sh10:05:011
3188554993728,7cyclictest3268743-21sh10:05:011
3188553993729,6cyclictest3306417-21mailstats10:50:490
3188553993727,3cyclictest3260645-21munin-plugin-st09:55:010
3188553993721,10cyclictest1055-21mta-sts-daemon11:45:420
3188553993721,10cyclictest1055-21mta-sts-daemon11:45:420
3188555993631,2cyclictest0-21swapper/211:15:002
3188555993631,2cyclictest0-21swapper/211:15:002
3188555993626,6cyclictest3282282-21mailstats10:20:562
318855599361,5cyclictest171rcu_preempt10:35:452
3188554993628,5cyclictest3295598-21ssh10:37:361
3188554993613,3cyclictest171rcu_preempt09:55:421
3188553993630,4cyclictest3215553-21systemd-run08:40:010
3188553993630,4cyclictest3203507-21cron08:00:010
3188553993620,9cyclictest12350irq/32-eth010:20:520
3188553993620,12cyclictest12350irq/32-eth009:20:460
318855599353,26cyclictest3233814-21ssh09:20:452
3188555993529,3cyclictest0-21swapper/211:10:012
3188555993529,3cyclictest0-21swapper/211:10:012
3188555993527,5cyclictest3354401-21needreboot11:50:412
3188555993524,8cyclictest3306004-21missed_timers10:50:382
318855599352,26cyclictest3386558-21ssh12:30:432
3188554993530,2cyclictest0-21swapper/107:30:021
3188554993528,4cyclictest0-21swapper/107:40:401
3188554993528,3cyclictest0-21swapper/112:05:011
3188554993527,5cyclictest3216980-21unixbench_singl08:40:531
3188554993526,7cyclictest3244527-21/usr/sbin/munin09:35:011
3188554993526,7cyclictest3244527-21/usr/sbin/munin09:35:011
3188554993525,7cyclictest695-21cron11:55:001
3188553993518,5cyclictest171rcu_preempt08:10:400
3188553993518,5cyclictest171rcu_preempt08:10:400
3188553993517,14cyclictest2389957-21cups-browsed12:15:500
3188553993516,4cyclictest171rcu_preempt09:05:480
3188553993514,16cyclictest659-21snmpd11:09:390
3188553993514,16cyclictest659-21snmpd11:09:390
3188555993428,3cyclictest0-21swapper/208:05:012
3188555993426,5cyclictest3298743-21unixbench_singl10:40:552
3188555993422,9cyclictest3190041-21idleruntime-cro07:15:012
3188555993420,9cyclictest420-21avahi-daemon07:55:452
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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