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2026-06-27 - 10:44

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 Jun 27, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
401884821760,5sleep3451irq_work/300:00:253
38765362880,2chrt471rcuc/321:40:233
3724991996456,6cyclictest3382387-21kworker/u8:3+flush-8:019:30:311
3724991995948,8cyclictest3751865-21/usr/sbin/munin19:35:321
3724991995447,5cyclictest2306736-21kworker/u8:2+flush-8:023:05:301
37877612520,4chrt0-21swapper/020:10:220
3724991995143,5cyclictest3756785-21kworker/u8:0+flush-8:020:45:201
3724991995042,6cyclictest2306736-21kworker/u8:2+flush-8:023:30:321
3724991995041,6cyclictest3830888-21latency_hist20:55:011
3724991994839,6cyclictest3955484-21/usr/sbin/munin23:00:251
3724991994741,4cyclictest4029207-21ntpq00:10:271
3724991994638,5cyclictest3756785-21kworker/u8:0+flush-8:019:55:191
3724991994637,7cyclictest4004039-21ntpq23:45:241
3724986994637,6cyclictest3950249-21latency_hist22:55:010
3724991994537,5cyclictest3846199-21kworker/u8:1+events_unbound21:20:011
3724991994532,9cyclictest2306736-21kworker/u8:2+flush-8:022:00:321
3724991994437,5cyclictest2306736-21kworker/u8:2+flush-8:020:30:201
3724991994436,6cyclictest2306736-21kworker/u8:2+flush-8:019:20:321
3724986994434,7cyclictest4010157-21/usr/sbin/munin23:55:260
3724991994333,8cyclictest3861403-21diskstats21:25:171
3724991994331,8cyclictest1704890-21systemd-journal20:25:551
3724991994136,3cyclictest3756785-21kworker/u8:0+flush-8:020:40:301
3724991994035,4cyclictest2306736-21kworker/u8:2+flush-8:022:30:311
3724996993933,4cyclictest3845735-21apt-get21:10:002
3724991993934,4cyclictest2306736-21kworker/u8:2+flush-8:022:46:251
3724991993932,5cyclictest3796224-21latency_hist20:20:011
3724991993928,9cyclictest3728974-21ntpq19:10:281
3724986993929,8cyclictest3775401-21ntpq19:55:270
3724996993828,7cyclictest1704890-21systemd-journal22:25:012
3724986993829,7cyclictest1704890-21systemd-journal21:25:000
3724986993829,6cyclictest3985206-21latency_hist23:30:010
3724991993731,4cyclictest3925282-21latency_hist22:30:021
3724991993730,5cyclictest3831153-21apt-get20:55:121
3724991993728,6cyclictest3850927-21latency_hist21:15:001
3724991993727,7cyclictest1704890-21systemd-journal23:24:591
37245502373,9sleep10-21swapper/119:06:391
3724996993627,7cyclictest1704890-21systemd-journal19:35:012
3724991993631,4cyclictest2306736-21kworker/u8:2+flush-8:023:40:161
3724991993631,3cyclictest4054835-21awk00:40:001
3724991993631,3cyclictest3382387-21kworker/u8:3+flush-8:019:20:001
3724991993629,5cyclictest3915008-21grep22:15:351
3724991993629,5cyclictest3875757-21kworker/u8:1+flush-8:022:50:311
3724986993629,5cyclictest3965138-21latency_hist23:10:010
372498699361,29cyclictest3761536-21kworker/0:0+events20:40:170
3724996993529,4cyclictest2306736-21kworker/u8:2+flush-8:019:40:322
3724991993528,5cyclictest2306736-21kworker/u8:2+flush-8:023:35:271
3724991993528,4cyclictest4015214-21apt-get00:00:141
3724991993516,13cyclictest1704890-21systemd-journal21:03:251
3724986993526,7cyclictest1704890-21systemd-journal23:35:000
3724986993524,8cyclictest3889638-21ntpq21:50:280
3724996993427,5cyclictest1704890-21systemd-journal23:52:162
3724996993427,5cyclictest1704890-21systemd-journal22:16:142
3724991993429,3cyclictest3805283-21kworker/u8:1+events_unbound20:35:311
3724991993428,4cyclictest3756785-21kworker/u8:0+flush-8:019:45:201
3724991993427,5cyclictest3776603-21/usr/sbin/munin20:00:281
3724991993426,6cyclictest3382387-21kworker/u8:3+flush-8:019:25:301
3724991993425,6cyclictest1704890-21systemd-journal23:25:251
3724991993419,10cyclictest1704890-21systemd-journal23:58:151
3724986993430,2cyclictest3761538-21systemd-run19:45:010
3724986993424,7cyclictest3895564-21latency_hist22:00:010
3724996993326,5cyclictest3876003-21apt-get21:40:152
3724991993327,4cyclictest3869891-21kworker/u8:0+events_unbound21:35:311
3724986993328,3cyclictest3821457-21cpuspeed_turbos20:45:180
3724986993323,8cyclictest4019960-21latency_hist00:05:010
3724986993316,14cyclictest1704890-21systemd-journal23:19:240
372498699330,31cyclictest3905516-21true22:10:010
37245662334,9sleep20-21swapper/219:06:522
3724991993227,3cyclictest4000046-21kworker/u8:3+flush-8:000:15:211
3724991993224,6cyclictest3885833-21kworker/u8:3+flush-8:022:05:301
3724986993224,6cyclictest3999077-21ntpq23:40:260
3724996993125,4cyclictest3826217-21apt-get20:50:142
3724996993125,4cyclictest3382387-21kworker/u8:3+flush-8:019:10:312
3724991993126,3cyclictest2306736-21kworker/u8:2+flush-8:019:50:181
3724991993121,7cyclictest3965157-21kworker/u8:1+flush-8:000:30:301
372498699315,20cyclictest3761536-21kworker/0:0+events20:15:150
3724986993120,8cyclictest3980013-21latency_hist23:25:010
3724986993110,20cyclictest3761536-21kworker/0:0+events21:00:010
3724996993026,2cyclictest4010414-21tr23:55:162
3724996993026,2cyclictest3959773-21unixbench_singl23:00:332
3724996993025,3cyclictest3850535-21unixbench_singl21:10:342
3724991993025,4cyclictest3875757-21kworker/u8:1+events_unbound22:40:301
372498699309,19cyclictest4044943-21kworker/0:1+events00:36:150
3724986993025,4cyclictest3855890-21awk21:20:000
3724986993025,3cyclictest1-21systemd21:09:590
3724986993020,8cyclictest3944371-21ntpq22:45:260
372498699301,27cyclictest3761536-21kworker/0:0+events20:25:250
38342742290,6sleep3451irq_work/320:55:243
3724996992925,2cyclictest3965634-21tr23:10:172
3724991992924,3cyclictest3820994-21kworker/u8:3+events_unbound21:30:351
372498699299,15cyclictest3761536-21kworker/0:0+events22:10:180
372498699296,21cyclictest3761536-21kworker/0:0+events21:35:170
3724986992925,2cyclictest3777552-21kthreadcore20:00:230
3724986992923,5cyclictest3869891-21kworker/u8:0+flush-8:021:45:310
3724986992923,5cyclictest3869891-21kworker/u8:0+flush-8:021:45:310
3724986992918,2cyclictest421rcuog/220:05:310
372498699291,27cyclictest3761536-21kworker/0:0+events22:15:270
3724986992911,17cyclictest3761536-21kworker/0:0+events22:55:230
37247902292,6sleep00-21swapper/019:09:480
3724996992824,2cyclictest3866176-21aten2_r5power_p21:30:172
3724996992822,4cyclictest3756785-21kworker/u8:0+flush-8:020:55:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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