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2026-08-10 - 10:51

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 Mon Aug 10, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28369302690,2sleep3575-21kworker/3:2-events19:55:003
2790443995939,17cyclictest275-21systemd-journal19:43:041
2790439995443,8cyclictest3025012-21latency_hist23:05:000
2790439995140,8cyclictest275-21systemd-journal22:25:010
2790443994938,8cyclictest2955717-21latency_hist21:55:021
2790439994331,10cyclictest2817837-21diskstats19:37:490
2790443994031,7cyclictest275-21systemd-journal19:15:011
2790443994031,6cyclictest2896175-21latency_hist20:55:011
2790443994026,12cyclictest3104602-21systemd-run00:25:001
2790439994031,6cyclictest2817356-21kworker/u8:1+flush-8:019:58:030
2790446993934,4cyclictest2955946-21kworker/u8:1+flush-8:022:33:002
2790439993929,8cyclictest2817356-21kworker/u8:1+flush-8:020:03:040
2790439993929,8cyclictest2817356-21kworker/u8:1+flush-8:020:03:040
2790439993928,8cyclictest275-21systemd-journal22:35:000
2790443993828,7cyclictest2960700-21latency_hist22:00:011
2790443993827,9cyclictest3006380-21irqrtprio22:47:521
2790439993828,7cyclictest3069486-21grep23:48:040
2790443993726,9cyclictest3077254-21kthreadcore23:57:541
2790443993716,18cyclictest3030181-21latency_hist23:10:011
2790443993711,13cyclictest0-21swapper/123:14:021
2790439993731,5cyclictest3064086-21kworker/u8:0+flush-8:000:05:010
279044399364,6cyclictest0-21swapper/119:22:471
2790443993620,15cyclictest3064086-21kworker/u8:0-ext4-rsv-conversion00:30:001
2790443993613,11cyclictest0-21swapper/122:08:221
2790446993529,4cyclictest2812195-21munin-plugin-st19:30:002
2790443993517,16cyclictest2906054-21systemd-run21:05:001
2790443993517,16cyclictest0-21swapper/120:10:001
2790443993510,12cyclictest0-21swapper/119:16:571
279044399348,14cyclictest0-21swapper/123:28:101
279044399343,5cyclictest0-21swapper/122:52:451
2790443993428,4cyclictest20823-21cron21:00:001
2790443993422,10cyclictest0-21swapper/121:20:001
2790443993419,13cyclictest2941321-21apt-get21:42:421
2790443993418,14cyclictest0-21swapper/119:40:001
2790443993417,15cyclictest2881326-21cron20:40:011
2790443993417,15cyclictest0-21swapper/123:35:001
2790443993417,15cyclictest0-21swapper/119:58:061
2790443993415,17cyclictest0-21swapper/122:03:001
2790443993415,17cyclictest0-21swapper/121:37:591
2790446993328,3cyclictest3000288-21kworker/u8:2+flush-8:023:30:002
2790446993327,4cyclictest2846542-21unixbench_singl20:03:072
2790446993327,4cyclictest2846542-21unixbench_singl20:03:072
2790446993323,7cyclictest2921064-21awk21:20:002
279044399334,4cyclictest0-21swapper/121:07:451
279044399334,4cyclictest0-21swapper/121:07:451
2790443993325,6cyclictest2980914-21apt-get22:22:431
2790443993323,7cyclictest2995296-21latency_hist22:35:011
2790443993317,14cyclictest0-21swapper/100:07:501
2790443993316,15cyclictest0-21swapper/122:58:011
2790443993316,15cyclictest0-21swapper/122:43:021
2790443993315,16cyclictest0-21swapper/122:12:511
2790443993315,16cyclictest0-21swapper/122:12:511
2790439993324,7cyclictest2865835-21ntpq20:22:580
2790439993324,7cyclictest2816464-21ntpq19:32:590
279044399323,6cyclictest0-21swapper/100:17:441
279044399322,12cyclictest2911412-21apt-get21:12:441
2790443993221,10cyclictest2927062-21sort21:27:521
2790443993218,12cyclictest2890941-21unixbench_multi20:48:051
2790443993218,12cyclictest0-21swapper/120:27:521
2790443993217,13cyclictest1-21systemd23:16:071
2790443993217,13cyclictest0-21swapper/119:50:001
2790443993216,14cyclictest0-21swapper/121:32:481
2790443993216,14cyclictest0-21swapper/121:22:571
2790443993216,14cyclictest0-21swapper/120:17:591
2790443993216,14cyclictest0-21swapper/120:03:011
2790443993216,14cyclictest0-21swapper/120:03:011
2790443993215,15cyclictest0-21swapper/120:43:031
2790439993227,3cyclictest2807304-21systemd-run19:25:010
279043999320,30cyclictest3079657-21munin-run00:00:010
2790446993127,3cyclictest2955946-21kworker/u8:1+flush-8:023:32:582
2790446993126,4cyclictest2980476-21kworker/u8:3+flush-8:022:42:522
279044399318,6cyclictest3118809-21ntpq00:38:011
2790443993118,11cyclictest0-21swapper/121:47:491
2790443993115,14cyclictest0-21swapper/120:23:031
2790443993114,15cyclictest0-21swapper/123:52:541
2790443993113,16cyclictest0-21swapper/123:42:581
2790443993113,15cyclictest2875645-21ntpq20:32:571
2790443993112,2cyclictest0-21swapper/100:32:551
2790443993112,2cyclictest0-21swapper/100:13:081
2790439993126,3cyclictest3060355-21aten2_r5power_p23:42:460
2790439993126,3cyclictest2988935-21kthreadcore22:27:550
2790439993126,3cyclictest2961526-21fschecks_time22:02:480
2790439993126,3cyclictest2882117-21fschecks_time20:42:490
2790439993125,4cyclictest2916057-21apt-key21:15:000
279044399303,6cyclictest0-21swapper/123:47:471
279044399303,5cyclictest0-21swapper/119:32:451
2790443993014,14cyclictest3044533-21switchtime23:23:041
2790443993014,14cyclictest2856444-21unixbench_singl20:13:061
2790443993011,17cyclictest2807853-21cpu19:27:471
2790439993024,4cyclictest3115704-21sed00:37:520
2790439993023,5cyclictest3074623-21cron23:55:000
2790439993023,5cyclictest2930929-21latency_hist21:30:010
2790439993022,5cyclictest3114271-21grep00:33:090
2790439993021,6cyclictest275-21systemd-journal23:05:010
2790439993020,8cyclictest2831251-21ntpq19:48:010
27855632304,9sleep20-21swapper/219:05:212
2790446992924,3cyclictest3015904-21fschecks_time22:57:482
2790446992924,3cyclictest2975992-21aten2_r5power_c22:17:462
279044399297,3cyclictest0-21swapper/122:15:441
2790443992915,12cyclictest0-21swapper/122:27:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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