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2026-09-07 - 18:56

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 Sep 07, 2026 12:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40437422860,2chrt75-21kworker/3:1+events09:34:163
40221372770,6chrt0-21swapper/309:14:143
3899571994635,8cyclictest4160461-21cat11:30:012
3899571994438,4cyclictest3955580-21kworker/u8:2+events_unbound09:04:132
3899571994339,3cyclictest3921755-21kworker/u8:1+events_unbound08:04:112
3899571994233,6cyclictest3904483-21latency_hist07:15:012
3899565994236,3cyclictest1-21systemd07:35:000
38950132423,13sleep03895039-21apt-get07:09:060
3899571994136,3cyclictest4079677-21kworker/u8:2+events_unbound10:29:192
3899567994132,6cyclictest278-21systemd-journal10:44:081
3899565994132,7cyclictest4185303-21latency_hist11:55:000
3899565994034,4cyclictest4175161-21kworker/u8:2+events_unbound12:34:110
3899565994032,6cyclictest3931441-21latency_hist07:40:010
3899571993933,4cyclictest3986097-21kworker/u8:3+events_unbound09:24:132
3899567993929,8cyclictest4110494-21gpgv10:40:001
3899565993926,10cyclictest4110451-21apt-get10:40:010
3899571993833,4cyclictest3055708-21kworker/u8:2+flush-8:007:49:142
3899565993824,10cyclictest278-21systemd-journal09:53:090
3899571993732,4cyclictest4175161-21kworker/u8:2+flush-8:012:29:232
3899567993727,8cyclictest278-21systemd-journal12:00:001
3899567993627,6cyclictest6223-21latency_hist12:10:011
3899567993627,6cyclictest3981492-21/usr/sbin/munin08:34:181
3899565993628,6cyclictest4015450-21grep09:04:250
3899565993625,8cyclictest21079-21latency_hist12:25:010
3899571993526,6cyclictest4060470-21kworker/u8:0+events_unbound10:04:212
389956599356,17cyclictest576-21runrttasks07:24:210
3899571993429,3cyclictest4103304-21kworker/u8:3+events_unbound10:49:242
389956599349,17cyclictest3955800-21grep08:04:240
389956599345,18cyclictest0-21swapper/010:19:090
3899565993411,15cyclictest4019986-21ld09:09:190
3899571993329,3cyclictest4103304-21kworker/u8:3+events_unbound11:15:012
3899567993328,3cyclictest4002226-21kthreadcore08:54:141
3899567993328,3cyclictest3945585-21needreboot07:54:171
389956599337,15cyclictest3995168-21ntpq08:44:190
3899565993325,7cyclictest4091411-21sshd10:24:090
389956599332,19cyclictest0-21swapper/012:39:060
389956599332,15cyclictest838-21mta-sts-daemon10:09:180
3899565993317,10cyclictest4050429-21grep09:39:250
3899565993311,10cyclictest0-21swapper/010:29:480
3899567993227,4cyclictest3955580-21kworker/u8:2+flush-8:008:44:551
3899567993226,4cyclictest4103304-21kworker/u8:3+flush-8:011:24:101
3899567993226,4cyclictest4060470-21kworker/u8:0+events_unbound10:29:101
3899567993226,4cyclictest3055708-21kworker/u8:2+flush-8:007:24:251
3899567993225,5cyclictest4175161-21kworker/u8:2+events_unbound12:04:251
3899565993224,6cyclictest4155195-21apt-get11:25:010
3899565993223,6cyclictest278-21systemd-journal09:25:000
41817502310,3sleep1161rcu_preempt11:54:151
3899567993126,4cyclictest4060446-21idleruntime-cro09:50:001
3899567993126,3cyclictest3990817-21cron08:40:001
3899567993126,3cyclictest32232-21irqrtprio12:39:131
3899567993125,4cyclictest4140311-21idleruntime-cro11:10:011
3899567993124,5cyclictest3997089-21irqrtprio08:49:151
389956599318,10cyclictest4029849-21ntpq09:19:180
389956599317,11cyclictest920-21python312:04:250
389956599317,11cyclictest4104867-21ntpq10:34:190
389956599316,11cyclictest4084825-21ntpq10:14:190
389956599315,16cyclictest4179635-21/usr/sbin/munin11:49:230
389956599315,15cyclictest4116953-21ps10:49:150
389956599313,18cyclictest4189879-21python311:59:240
3899565993125,4cyclictest4074879-21chrt10:04:220
3899565993122,7cyclictest3980954-21latency_hist08:30:010
3899565993121,8cyclictest11694-21/usr/sbin/munin12:19:170
3899565993120,9cyclictest2098-21diskstats12:09:100
3899565993110,8cyclictest3975631-21python308:24:250
3899567993025,4cyclictest3955580-21kworker/u8:2+events_unbound08:19:221
3899567993025,3cyclictest4103304-21kworker/u8:3+flush-8:010:49:091
389956599306,5cyclictest4045235-21/usr/sbin/munin09:34:240
389956599306,12cyclictest4129834-21ntpq10:59:240
389956599306,12cyclictest4129834-21ntpq10:59:240
389956599306,12cyclictest10492-21/usr/sbin/munin12:14:190
389956599305,13cyclictest3940719-21ntpq07:49:200
389956599304,15cyclictest4144723-21ntpq11:14:220
389956599304,15cyclictest3910765-21ntpq07:19:210
389956599303,17cyclictest3990241-21ntpq08:39:200
389956599303,16cyclictest3961925-21df_inode08:14:090
3899565993024,4cyclictest3951205-21ls08:00:000
389956599302,17cyclictest3941876-21sshd07:54:070
389956599301,27cyclictest4040469-21munin-run09:30:000
3899571992924,4cyclictest3986097-21kworker/u8:3+flush-8:008:39:252
3899571992923,4cyclictest11656-21kworker/u8:1+events_unbound12:39:192
3899571992920,7cyclictest4040507-21cp09:30:002
3899567992925,2cyclictest0-21swapper/110:20:001
3899567992924,4cyclictest4140330-21kworker/u8:2+events_unbound11:29:171
3899567992924,3cyclictest4021257-21sshd09:14:081
3899567992922,5cyclictest278-21systemd-journal10:10:091
3899567992919,8cyclictest4075862-21/usr/sbin/munin10:09:201
389956599297,11cyclictest4171252-21/usr/sbin/munin11:44:110
389956599297,10cyclictest4169652-21ntpq11:39:200
389956599296,13cyclictest4146335-21/usr/sbin/munin11:19:140
389956599296,11cyclictest4131501-21/usr/sbin/munin11:04:110
389956599295,15cyclictest4005119-21ntpq08:54:200
389956599295,14cyclictest4115090-21ntpq10:44:200
389956599295,14cyclictest4059861-21ntpq09:49:200
389956599295,12cyclictest4159718-21ntpq11:29:180
389956599295,12cyclictest4010008-21ntpq08:59:210
389956599295,12cyclictest3985339-21ntpq08:34:220
389956599294,15cyclictest4164769-21ntpq11:34:210
389956599294,15cyclictest4136004-21aten2_r5power_p11:09:090
389956599294,15cyclictest4051860-21ps09:44:150
389956599294,15cyclictest3970443-21ntpq08:19:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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