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2026-08-16 - 15:34

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 Sun Aug 16, 2026 12:43:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3129585995343,7cyclictest3239970-21sshd11:11:012
3129585995343,7cyclictest3239970-21sshd11:11:012
3129585995239,8cyclictest3281577-21date12:20:032
3129582995243,6cyclictest421-21dbus-daemon07:20:010
3129582994839,6cyclictest2341350-21cups-browsed09:47:230
3129582994835,10cyclictest3166844-21sshd09:11:010
3129585994738,4cyclictest0-21swapper/211:25:592
3129582994738,5cyclictest3162587-21systemd-run09:00:010
3129582994737,8cyclictest0-21swapper/010:41:010
3129585994633,10cyclictest3267495-21mailstats11:56:062
3129582994628,9cyclictest12650irq/32-eth011:46:010
3129582994627,13cyclictest12650irq/32-eth009:40:570
312958299454,32cyclictest2341350-21cups-browsed11:00:580
3129582994538,4cyclictest3183997-21systemd09:40:010
3129582994533,10cyclictest3282789-21mailstats12:21:100
3129583994434,6cyclictest265-21systemd-journal12:04:591
3129583994434,6cyclictest265-21systemd-journal12:04:591
3129582994334,6cyclictest2341350-21cups-browsed10:19:080
3129582994334,6cyclictest2341350-21cups-browsed10:19:080
312958299424,17cyclictest3226579-21kworker/u8:0+rpciod10:50:560
3129582994231,8cyclictest3272189-21cron12:05:000
3129582994231,8cyclictest3272189-21cron12:05:000
3129582994219,14cyclictest151ktimers/009:51:030
312958399414,27cyclictest3255144-21ssh11:36:001
3129583994133,5cyclictest3269173-21systemd-run12:00:011
3129583994127,4cyclictest171rcu_preempt08:05:011
3129582994134,5cyclictest3156651-21latency_hist08:40:020
3129582994124,13cyclictest151ktimers/008:41:000
312958299412,34cyclictest3267234-21ssh11:55:570
312958599403,33cyclictest3273451-21rm12:06:012
312958599403,33cyclictest3273451-21rm12:06:012
3129585994031,6cyclictest421-21dbus-daemon07:20:012
3129583994033,4cyclictest1000-21mta-sts-daemon09:22:431
3129583994032,4cyclictest0-21swapper/107:20:011
3129583994030,6cyclictest421-21dbus-daemon10:59:411
3129582994025,12cyclictest3197865-21unixbench_multi10:01:100
3129585993933,3cyclictest0-21swapper/212:35:012
3129585993931,5cyclictest3146080-21idleruntime-cro08:05:012
3129583993931,4cyclictest1000-21mta-sts-daemon11:42:191
3129583993923,5cyclictest171rcu_preempt11:15:581
3129583993923,3cyclictest171rcu_preempt09:36:011
3129582993934,2cyclictest0-21swapper/009:20:010
3129582993932,4cyclictest3232677-21systemd-run11:00:020
3129582993926,10cyclictest3200801-21timerandwakeup10:06:100
312958299392,32cyclictest3236976-21ssh11:06:020
3129585993831,4cyclictest3281333-21ssh12:20:012
3129585993830,5cyclictest3144556-21cut08:00:002
3129585993830,5cyclictest3138595-21systemd-run07:40:012
312958399383,28cyclictest3169767-21rm09:15:561
3129583993831,4cyclictest3176536-21grep09:26:101
3129583993831,4cyclictest3176536-21grep09:26:101
3129583993830,5cyclictest3150559-21munin-run08:20:001
3129583993830,5cyclictest3150559-21munin-run08:20:001
3129583993826,9cyclictest2440529-21munin-node11:31:151
3129582993832,4cyclictest3131176-21latency_hist07:15:020
3129585993725,9cyclictest3285930-21timerandwakeup12:26:082
3129585993725,8cyclictest3173360-21timerwakeupswit09:21:082
312958399377,20cyclictest3209561-21ssh10:21:021
3129583993718,10cyclictest0-21swapper/109:50:021
312958299376,23cyclictest428-21mta-sts-daemon08:16:000
312958299376,23cyclictest428-21mta-sts-daemon08:16:000
3129582993730,5cyclictest12650irq/32-eth011:10:590
3129582993730,5cyclictest12650irq/32-eth011:10:590
3129582993722,10cyclictest12650irq/32-eth008:45:560
3129585993628,5cyclictest3224878-21ps10:46:072
3129585993624,8cyclictest420-21avahi-daemon10:51:152
3129583993629,4cyclictest3290421-21latency_hist12:35:011
3129583993629,4cyclictest3143051-21cron07:55:001
3129583993628,5cyclictest3275226-21sh12:10:001
3129583993628,5cyclictest3275226-21sh12:10:001
3129583993628,5cyclictest3266211-21latency_hist11:55:021
3129583993628,5cyclictest3191841-21unixbench_singl09:51:111
3129585993528,4cyclictest3164015-21unixbench_singl09:01:092
3129585993526,5cyclictest3246249-21mailstats11:21:052
3129585993525,6cyclictest3223513-21cron10:45:012
3129585993524,8cyclictest3209275-21latency10:20:542
3129585993524,6cyclictest1001-21mta-sts-daemon08:10:592
3129585993524,6cyclictest1001-21mta-sts-daemon08:10:592
312958399353,27cyclictest3276528-21ssh12:11:021
312958399353,27cyclictest3276528-21ssh12:11:021
312958399353,24cyclictest3215719-21ssh10:31:031
3129583993530,2cyclictest0-21swapper/111:01:011
3129583993529,3cyclictest0-21swapper/111:50:011
3129583993528,4cyclictest3205248-21cron10:15:011
3129583993528,4cyclictest3144597-21kworker/u8:11-xprtiod09:10:011
3129583993528,3cyclictest0-21swapper/111:21:011
3129583993527,5cyclictest3219124-21unixbench-2d10:36:101
3129583993524,7cyclictest3284923-21aten_r2power_fr12:25:471
3129583993518,7cyclictest171rcu_preempt07:46:111
3129583993518,7cyclictest171rcu_preempt07:46:111
3129583993517,2cyclictest171rcu_preempt10:16:051
3129583993517,2cyclictest171rcu_preempt10:16:051
3129582993520,12cyclictest3247894-21systemd-run11:25:010
3129585993428,3cyclictest0-21swapper/210:25:482
3129585993427,5cyclictest3129581-21cyclictest11:51:082
3129585993427,3cyclictest0-21swapper/209:51:092
3129585993426,5cyclictest3233619-21ssh11:00:542
3129585993426,5cyclictest3232631-21munin-run11:00:012
3129585993426,5cyclictest3165553-21cron09:10:012
3129585993426,5cyclictest265-21systemd-journal10:35:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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