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2026-06-16 - 18:05

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 Tue Jun 16, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40059632880,6chrt0-21swapper/207:45:342
3965566997465,7cyclictest4190655-21kworker/u8:0+flush-8:011:15:430
40404912720,5chrt0-21swapper/208:20:342
3965566996645,8cyclictest4125436-21ntpq09:45:390
3965574996454,8cyclictest4161112-21cp10:25:002
3965574996256,4cyclictest4190655-21kworker/u8:0+flush-8:011:40:442
3965574996155,4cyclictest31536-21apt-get11:30:002
3965571996054,4cyclictest4106255-21kworker/u8:3+events_unbound10:05:421
3965571995948,6cyclictest1704890-21systemd-journal09:45:421
3965571995851,4cyclictest56754-21kworker/u8:1+events_unbound12:35:421
3965571995851,4cyclictest56754-21kworker/u8:1+events_unbound12:35:421
3965571995850,6cyclictest4106255-21kworker/u8:3+flush-8:009:30:361
3965571995847,8cyclictest4150194-21ntpq10:10:381
3965571995846,9cyclictest4115580-21ntpq09:35:381
3965574995752,4cyclictest4076485-21kworker/u8:1+events_unbound11:00:432
3965571995650,4cyclictest2596405-21kworker/u8:2+events_unbound08:40:001
3965571995649,4cyclictest4106255-21kworker/u8:3+flush-8:010:00:311
3965571995649,4cyclictest4106255-21kworker/u8:3+flush-8:010:00:311
3965571995648,6cyclictest4042542-21kworker/u8:3+events_unbound08:45:431
828032550,2chrt75-21kworker/3:1+events12:20:333
3965571995548,5cyclictest2596405-21kworker/u8:2+flush-8:007:25:441
3965571995547,6cyclictest4057381-21/usr/sbin/munin08:40:441
3965574995349,3cyclictest3908046-21kworker/u8:0+flush-8:007:40:432
3965571995349,3cyclictest4042542-21kworker/u8:3+flush-8:008:25:411
3965571995344,6cyclictest4156081-21latency_hist10:20:021
41673382520,1sleep14167344-21sed10:30:321
3965571995244,6cyclictest4077160-21/usr/sbin/munin09:00:391
3965571995244,6cyclictest2596405-21kworker/u8:2+flush-8:008:30:281
3965571995139,9cyclictest1704890-21systemd-journal11:50:411
3965574995044,4cyclictest4042542-21kworker/u8:3+flush-8:008:55:392
3965571995044,4cyclictest3908046-21kworker/u8:0+flush-8:008:10:301
3965571995041,6cyclictest3976403-21ntpq07:15:371
3965571994916,31cyclictest1-21systemd09:55:411
3965571994916,31cyclictest1-21systemd09:55:411
3965566994940,6cyclictest4026992-21latency_hist08:10:010
3965566994838,7cyclictest66399-21latency_hist12:05:010
3965566994739,6cyclictest56754-21kworker/u8:1+flush-8:012:05:260
3965566994737,8cyclictest2596405-21kworker/u8:2+flush-8:008:35:310
3965566994737,7cyclictest4042542-21kworker/u8:3+flush-8:008:45:310
3965571994640,4cyclictest4091970-21kworker/u8:2+flush-8:009:15:311
3965571994635,8cyclictest10889-21ntpq11:05:371
3965566994636,8cyclictest4090878-21ntpq09:10:400
3965571994539,4cyclictest3908046-21kworker/u8:0+flush-8:007:20:361
3965574994439,4cyclictest4042542-21kworker/u8:3+flush-8:008:40:452
3965574994438,5cyclictest4091970-21kworker/u8:2+flush-8:009:15:332
3965571994436,5cyclictest81475-21latency_hist12:20:001
3965571994434,8cyclictest4156627-21diskstats10:20:261
3965566994435,7cyclictest4072482-21diskstats08:55:290
3965566994434,7cyclictest4047262-21latency_hist08:30:010
3965574994339,3cyclictest56754-21kworker/u8:1+events_unbound12:10:402
3965574994334,7cyclictest4111526-21turbostat.cron09:34:592
3965574994334,6cyclictest1704890-21systemd-journal12:35:002
3965571994337,4cyclictest4012450-21apt-get07:55:251
3965571994336,5cyclictest3908046-21kworker/u8:0+flush-8:008:20:281
3965571994336,3cyclictest3908046-21kworker/u8:0+flush-8:007:35:261
3965571994333,7cyclictest4076897-21latency_hist09:00:011
3965571994331,9cyclictest3969560-21ntpq07:10:361
3965571994236,4cyclictest4042542-21kworker/u8:3+flush-8:008:50:411
3965571994235,4cyclictest12076-21apt-get11:10:221
3965571994232,7cyclictest4186235-21/usr/sbin/munin10:50:391
3965574994137,3cyclictest4091970-21kworker/u8:2+flush-8:010:40:262
3965574994130,9cyclictest4057122-21awk08:40:002
3965571994135,4cyclictest4106255-21kworker/u8:3+events_unbound09:40:381
3965571994133,5cyclictest56754-21kworker/u8:1+events_unbound12:25:271
3965571994125,10cyclictest1704890-21systemd-journal09:21:411
3965566994131,8cyclictest3997073-21apt-get07:40:010
3965566994130,9cyclictest4037094-21apt-get08:20:000
3965566994129,9cyclictest1704890-21systemd-journal11:40:000
3965571994033,5cyclictest46126-21kworker/u8:2+events_unbound12:20:281
3965571994031,6cyclictest60586-21ntpq11:55:401
3965571994031,2cyclictest161rcu_preempt09:14:591
3965566994036,3cyclictest4190655-21kworker/u8:0+events_unbound11:20:340
3965571993930,7cyclictest1704890-21systemd-journal10:42:421
3965571993929,7cyclictest4085897-21ntpq09:05:381
3965566993929,8cyclictest4180135-21ntpq10:40:360
3965566993929,8cyclictest1704890-21systemd-journal10:20:000
3965571993833,4cyclictest3908046-21kworker/u8:0+flush-8:008:05:291
3965571993832,4cyclictest4091970-21kworker/u8:2+events_unbound10:25:421
3965571993832,4cyclictest2596405-21kworker/u8:2+flush-8:007:30:311
3965566993833,4cyclictest2596405-21kworker/u8:2+events_unbound09:05:420
39611932384,10sleep20-21swapper/207:05:312
39611932384,10sleep20-21swapper/207:05:312
3965574993732,3cyclictest46126-21kworker/u8:2+flush-8:012:15:402
3965571993731,4cyclictest4076485-21kworker/u8:1+flush-8:011:35:261
3965566993732,3cyclictest4091970-21kworker/u8:2+flush-8:010:25:320
3965566993731,4cyclictest4091970-21kworker/u8:2+events_unbound09:20:400
3965566993727,8cyclictest1704890-21systemd-journal12:30:410
3965571993630,4cyclictest46126-21kworker/u8:2+events_unbound12:30:331
3965571993629,4cyclictest4161477-21kworker/u8:0+flush-8:010:35:371
3965571993627,6cyclictest4106255-21kworker/u8:3+events_unbound09:50:301
3965566993630,5cyclictest4091970-21kworker/u8:2+events_unbound09:15:340
3965566993630,5cyclictest3908046-21kworker/u8:0+flush-8:007:15:290
3965566993626,8cyclictest4171389-21kworker/u8:3+flush-8:011:30:370
3965566993626,7cyclictest4135481-21ntpq09:55:390
3965566993626,7cyclictest4135481-21ntpq09:55:380
3965571993530,4cyclictest2596405-21kworker/u8:2+events_unbound07:45:371
3965571993529,4cyclictest4181352-21apt-get10:45:251
3965571993527,6cyclictest4076485-21kworker/u8:1+events_unbound10:55:431
3965566993530,3cyclictest4161477-21kworker/u8:0+events_unbound10:35:420
3965566993525,7cyclictest76543-21latency_hist12:15:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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