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2026-08-01 - 20:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Sat Aug 01, 2026 12:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2996191994741,4cyclictest275-21systemd-journal08:40:010
2996193994540,4cyclictest3265728-21kworker/u8:0+flush-8:012:37:561
2996191994436,6cyclictest3320027-21latency_hist12:35:010
2996193994336,5cyclictest3067857-21/usr/sbin/munin08:23:091
32653702420,4sleep20-21swapper/211:38:112
2996191994235,5cyclictest3265728-21kworker/u8:0+flush-8:011:47:560
2996193994031,7cyclictest3305229-21latency_hist12:20:011
2996191994031,6cyclictest3062460-21latency_hist08:15:010
2996193993933,4cyclictest3001253-21kworker/u8:3+events_unbound07:55:011
2996193993932,5cyclictest3226389-21/usr/sbin/munin11:03:111
2996193993930,7cyclictest3017913-21latency_hist07:30:001
2996193993831,5cyclictest3121826-21kworker/u8:1+flush-8:009:27:581
2996193993731,4cyclictest2985946-21kworker/u8:2+flush-8:007:13:061
2996193993729,6cyclictest3137381-21/usr/sbin/munin09:33:101
2996193993728,6cyclictest3225931-21latency_hist11:00:011
2996193993727,7cyclictest3146862-21latency_hist09:40:001
2996193993631,4cyclictest3265728-21kworker/u8:0+flush-8:012:22:571
2996191993628,6cyclictest3186398-21latency_hist10:20:010
2996191993626,7cyclictest3141874-21latency_hist09:35:010
2996193993530,4cyclictest3097132-21kworker/u8:2+events_unbound09:05:001
2996193993530,4cyclictest3001253-21kworker/u8:3+flush-8:007:37:581
2996193993529,4cyclictest2985946-21kworker/u8:2+flush-8:008:18:101
2996193993527,5cyclictest275-21systemd-journal08:26:421
2996193993526,6cyclictest3057504-21latency_hist08:10:011
2996193993525,7cyclictest275-21systemd-journal12:32:421
2996191993528,5cyclictest3151805-21kworker/u8:2+flush-8:011:42:560
2996191993528,5cyclictest3151805-21kworker/u8:2+flush-8:011:42:560
2996191993524,8cyclictest275-21systemd-journal12:40:000
2996197993426,5cyclictest275-21systemd-journal07:45:002
2996193993428,4cyclictest3009229-21irqrtprio07:22:571
2996193993427,5cyclictest3132014-21cron09:25:001
2996191993425,7cyclictest3131355-21ntpq09:23:060
2996197993329,3cyclictest3111804-21kworker/u8:3+flush-8:010:18:082
2996193993328,3cyclictest3161701-21systemd-run09:55:001
2996191993326,5cyclictest3265728-21kworker/u8:0+flush-8:012:23:010
29957212333,8sleep10-21swapper/107:08:371
2996193993228,2cyclictest3060143-21kthreadcore08:13:021
2996193993227,4cyclictest3018141-21kworker/u8:0+flush-8:007:33:091
2996193993227,3cyclictest3057520-21kworker/u8:1+flush-8:008:52:561
2996193993225,5cyclictest3241221-21apt-get11:17:541
2996193993224,6cyclictest3206728-21aten2_r5power_v10:42:571
2996191993227,3cyclictest3176393-21kworker/u8:1+flush-8:010:33:130
2996191993227,3cyclictest3088431-21irqrtprio08:42:580
2996197993125,5cyclictest401-21dbus-daemon12:40:012
2996197993121,8cyclictest3310873-21cpuspeed_turbos12:27:542
2996193993125,5cyclictest3151805-21kworker/u8:2+flush-8:012:03:131
2996193993125,4cyclictest3275576-21idleruntime-cro11:50:001
2996193993125,4cyclictest3111804-21kworker/u8:3+flush-8:010:08:081
2996191993125,4cyclictest3225927-21idleruntime-cro11:00:000
2996191993124,5cyclictest3290378-21cat12:05:000
2996191993124,5cyclictest3097579-21apt-get08:52:510
2996191993124,5cyclictest2985946-21kworker/u8:2+flush-8:007:20:000
2996191993121,8cyclictest275-21systemd-journal11:40:000
2996191993118,4cyclictest3157318-21aten2_r5power_p09:52:530
2996197993021,7cyclictest3107781-21fschecks_count09:02:572
2996193993025,3cyclictest3213730-21kthreadcore10:48:021
2996193993024,4cyclictest414-21systemd-logind08:33:491
2996193993024,4cyclictest3235649-21kworker/u8:3+flush-8:011:32:561
2996193993024,4cyclictest3111804-21kworker/u8:3+events_unbound09:20:001
2996193993020,8cyclictest3037029-21ntpq07:48:091
2996191993025,4cyclictest3151805-21kworker/u8:2+flush-8:011:58:080
2996193992925,3cyclictest3057520-21kworker/u8:1+flush-8:008:38:101
2996193992924,4cyclictest3265728-21kworker/u8:0+flush-8:012:27:591
2996193992924,3cyclictest3248560-21kthreadcore11:23:011
2996193992924,3cyclictest3001253-21kworker/u8:3+events_unbound08:02:561
2996193992923,4cyclictest3043870-21irqrtprio07:58:001
2996191992926,2cyclictest3051811-21needreboot08:03:020
2996191992924,3cyclictest3113016-21irqcore09:08:000
2996191992923,4cyclictest3012764-21unixbench_singl07:23:100
299619199290,25cyclictest571-21snmpd10:47:530
2996197992825,2cyclictest3077977-21cpuspeed_turbos08:32:552
2996193992823,4cyclictest3151805-21kworker/u8:2+events_unbound12:15:011
2996193992823,3cyclictest3156791-21systemd-run09:50:011
2996193992822,4cyclictest3166408-21unixbench_multi09:58:111
2996193992821,5cyclictest3235649-21kworker/u8:3+events_unbound11:28:081
2996191992823,3cyclictest3299483-21needreboot12:13:030
2996191992822,4cyclictest3265728-21kworker/u8:0+flush-8:012:28:140
2996191992822,4cyclictest3001179-21latency_hist07:15:000
2996197992724,2cyclictest3126818-21unixbench_singl09:18:112
2996197992721,5cyclictest2985946-21kworker/u8:2+flush-8:007:18:472
2996197992721,4cyclictest3121845-21cron09:15:002
2996193992723,3cyclictest3235649-21kworker/u8:3+flush-8:011:38:101
2996193992720,5cyclictest2174223-21kworker/u8:1+events_unbound07:18:071
2996193992719,2cyclictest0-21swapper/110:32:561
2996193992717,8cyclictest3121181-21ntpq09:13:051
2996191992723,3cyclictest3250947-21latency_hist11:25:000
2996191992722,4cyclictest3072158-21unixbench_singl08:23:110
2996191992722,3cyclictest3190781-21ps10:23:080
2996191992721,4cyclictest275-21systemd-journal10:26:420
2996191992718,7cyclictest3067401-21latency_hist08:20:010
2996191992718,6cyclictest3206130-21latency_hist10:40:000
2996197992621,3cyclictest3231672-21fschecks_time11:07:562
2996197992621,3cyclictest3196778-21aten2_r5power_c10:32:542
2996197992620,4cyclictest275-21systemd-journal08:00:002
2996197992618,6cyclictest3266467-21fschecks_count11:42:562
2996197992618,6cyclictest3266467-21fschecks_count11:42:562
2996193992621,3cyclictest0-21swapper/108:50:011
2996193992618,5cyclictest3270668-21latency_hist11:45:001
2996193992618,5cyclictest3270668-21latency_hist11:45:001
2996193992618,5cyclictest3097132-21kworker/u8:2+events_unbound09:08:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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