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2026-09-23 - 02:59

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 Wed Sep 23, 2026 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
338780121920,2sleep3481ktimers/322:10:003
32980722540,5sleep3481ktimers/320:39:113
3206998995243,6cyclictest3437222-21latency_hist23:00:010
3206998995144,5cyclictest3442678-21/usr/sbin/munin23:09:140
3206998995039,9cyclictest278-21systemd-journal00:25:000
3207005994944,4cyclictest3382292-21kworker/u8:0+events_unbound22:04:122
3207005994844,3cyclictest3496506-21kworker/u8:1+events_unbound00:04:102
3207005994640,4cyclictest3223659-21kworker/u8:2+events_unbound20:59:182
3207005994638,6cyclictest278-21systemd-journal21:35:002
3207005994541,3cyclictest3406989-21kworker/u8:2+events_unbound22:29:182
3206998994535,8cyclictest3243215-21ntpq19:44:110
3207002994435,6cyclictest278-21systemd-journal19:31:231
3206998994433,8cyclictest3347339-21ntpq21:29:100
320699899441,40cyclictest1-21systemd20:11:220
3207002994327,14cyclictest3268771-21apt-get20:10:021
3206998994333,7cyclictest3206815-21latency_hist19:10:010
320242524328,10sleep10-21swapper/119:08:421
3207005994233,7cyclictest3303562-21turbostat.cron20:45:002
3207002994235,5cyclictest3393286-21apt-get22:19:011
3207002994235,5cyclictest3393286-21apt-get22:19:011
3206998994231,7cyclictest3373172-21base6421:55:010
3207005994137,3cyclictest3464680-21kworker/u8:2+events_unbound23:29:072
3207005994136,3cyclictest3164491-21kworker/u8:0+events_unbound19:14:132
3207002994125,13cyclictest278-21systemd-journal22:11:211
3206998994131,7cyclictest3402453-21grep22:24:150
3207005994036,3cyclictest3259108-21kworker/u8:0+events_unbound20:25:012
3207005994036,3cyclictest2387910-21kworker/u8:4+flush-8:023:14:052
3207005994034,4cyclictest2387910-21kworker/u8:4+events_unbound21:05:042
3207002994033,5cyclictest278-21systemd-journal23:46:211
3206998994029,8cyclictest3329018-21diskstats21:14:010
3207002993931,5cyclictest278-21systemd-journal20:03:221
3207002993930,6cyclictest3308519-21latency_hist20:50:011
3206998993931,5cyclictest2387910-21kworker/u8:4+flush-8:021:09:120
3206998993930,7cyclictest3372735-21latency_hist21:55:010
320699899392,32cyclictest3196949-21kworker/0:0+events19:11:170
3207005993834,3cyclictest2387910-21kworker/u8:4+events_unbound21:45:002
3207002993829,7cyclictest278-21systemd-journal23:20:001
3207002993829,6cyclictest278-21systemd-journal22:09:211
3207002993827,8cyclictest278-21systemd-journal19:24:221
3207002993820,14cyclictest0-21swapper/121:19:001
3206998993831,4cyclictest3312752-21ntpq20:54:110
3206998993825,10cyclictest278-21systemd-journal19:50:010
35327712370,4sleep1291ktimers/100:39:011
3207005993733,3cyclictest3223659-21kworker/u8:2+events_unbound19:59:192
3207002993725,10cyclictest3321076-21kthreadcore21:04:041
3207002993720,15cyclictest3432176-21unixbench_singl22:54:161
3207002993719,16cyclictest0-21swapper/122:44:091
3207002993718,16cyclictest3283805-21latency_hist20:25:011
3207002993717,18cyclictest3342947-21unixbench_singl21:24:171
3207005993632,3cyclictest2387910-21kworker/u8:4+flush-8:019:15:222
3207002993629,5cyclictest3313966-21apt-get20:58:571
3207002993624,10cyclictest278-21systemd-journal20:11:221
3207002993624,10cyclictest0-21swapper/119:45:011
3207002993623,11cyclictest3343594-21apt-get21:28:571
3207002993621,13cyclictest3298620-21cron20:40:001
3207002993619,15cyclictest3289284-21apt-get20:33:551
3207002993617,17cyclictest0-21swapper/100:29:101
320699899363,27cyclictest3387813-21kworker/0:1+events23:38:530
3207005993531,3cyclictest2387910-21kworker/u8:4+events_unbound23:44:012
3207002993528,5cyclictest3442705-21apt-get23:08:561
3207002993521,12cyclictest3313261-21unixbench_multi20:54:181
3207002993518,15cyclictest0-21swapper/122:05:001
3207002993518,15cyclictest0-21swapper/121:14:041
3207002993517,16cyclictest3249145-21latency_hist19:50:011
3207002993517,16cyclictest0-21swapper/121:09:021
3207002993512,7cyclictest3207431-21apt-get19:13:571
3207002993511,6cyclictest3441504-21ntpq23:04:101
3207005993430,3cyclictest3464680-21kworker/u8:2+events_unbound00:19:142
3207005993430,3cyclictest3212056-21kworker/u8:1+events_unbound19:24:082
3207005993430,3cyclictest2387910-21kworker/u8:4+events_unbound19:45:072
3207002993424,8cyclictest3406908-21ntpq22:29:141
3207002993418,14cyclictest0-21swapper/122:48:551
3207002993418,14cyclictest0-21swapper/100:24:141
3207002993417,15cyclictest3473012-21irqcore23:39:001
3207002993417,15cyclictest3352821-21unixbench_singl21:34:161
3207002993417,15cyclictest0-21swapper/121:39:061
3207002993413,4cyclictest0-21swapper/121:44:141
3206998993429,3cyclictest3496562-21apt-get00:00:000
3206998993428,4cyclictest3333732-21apt-get21:18:590
3206998993427,5cyclictest3212056-21kworker/u8:1+flush-8:019:19:070
3206998993426,6cyclictest278-21systemd-journal00:10:330
3206998993425,7cyclictest3387790-21latency_hist22:10:000
3207005993327,4cyclictest3223659-21kworker/u8:2+events_unbound20:35:012
3207002993326,5cyclictest3457550-21apt-get23:23:551
3207002993325,6cyclictest3249539-21apt-get19:53:551
3207002993324,6cyclictest3412555-21latency_hist22:35:011
3207002993317,14cyclictest0-21swapper/123:59:041
3207002993316,15cyclictest0-21swapper/121:54:151
3207002993315,16cyclictest0-21swapper/123:34:121
3207002993314,2cyclictest0-21swapper/123:44:111
3207002993314,2cyclictest0-21swapper/122:39:011
3207002993313,5cyclictest0-21swapper/122:24:141
3207002993311,8cyclictest3238174-21ntpq19:39:081
3207002993311,3cyclictest0-21swapper/120:26:031
3206998993323,7cyclictest3323175-21grep21:04:150
32280482320,2sleep00-21swapper/019:29:060
3207005993226,4cyclictest3372589-21unixbench_multi21:54:162
3207005993222,7cyclictest3308520-21turbostat.cron20:50:002
3207002993216,14cyclictest0-21swapper/120:19:131
3207002993215,15cyclictest0-21swapper/121:59:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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