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2026-09-15 - 15:55

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 Sep 15, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
279120023470,4sleep30-21swapper/311:39:113
252428599216201,13cyclictest0-21swapper/012:18:250
252428599216201,13cyclictest0-21swapper/012:18:250
274769522020,3sleep375-21kworker/3:1-events10:54:103
252428799133128,3cyclictest0-21swapper/112:18:251
252428799133128,3cyclictest0-21swapper/112:18:251
26415322600,3sleep375-21kworker/3:1+events09:09:053
2524287995944,12cyclictest2571062-21latency_hist07:55:011
2524287995740,14cyclictest2650548-21latency_hist09:15:011
2524287995243,6cyclictest2838930-21latency_hist12:25:001
2524287995029,13cyclictest161rcu_preempt11:44:031
2524285994936,10cyclictest2615549-21latency_hist08:40:020
2524287994828,18cyclictest2823813-21latency_hist12:10:001
2524291994739,5cyclictest2829293-21apt-get12:18:252
2524291994739,5cyclictest2829293-21apt-get12:18:252
2524287994731,13cyclictest2586436-21/usr/sbin/munin08:14:191
2524287994731,13cyclictest2586436-21/usr/sbin/munin08:14:191
252428799471,28cyclictest2738449-21kthreadcore10:44:121
27245072460,4sleep10-21swapper/110:29:201
2524287994636,7cyclictest2561191-21latency_hist07:45:021
2524287994533,10cyclictest2828748-21idleruntime-cro12:15:001
2524287994435,7cyclictest2610611-21latency_hist08:35:011
2524285994430,5cyclictest2755202-21apt-get11:04:020
2524285994430,5cyclictest2755202-21apt-get11:04:010
2524285994335,5cyclictest2546492-21kworker/u8:2+flush-8:010:49:050
2524287994231,9cyclictest2641484-21diskstats09:09:051
2524291994134,5cyclictest2749838-21cat10:55:002
2524287993914,16cyclictest0-21swapper/110:59:181
2524285993931,6cyclictest2695642-21/usr/sbin/munin10:04:210
2524291993732,4cyclictest2596044-21kworker/u8:1+flush-8:010:09:182
2524287993727,8cyclictest2625682-21systemctl08:50:011
2524287993711,14cyclictest2710683-21df10:19:021
252428799370,22cyclictest2626223-21runrttasks08:51:401
2524291993626,8cyclictest2536418-21cat07:20:012
252428799363,29cyclictest0-21swapper/110:54:001
2524287993614,10cyclictest0-21swapper/108:02:251
252428799361,27cyclictest2804597-21apt-get11:54:031
252428799360,25cyclictest2690431-21taskset09:55:441
252428799360,23cyclictest2541851-21runrttasks07:28:541
252428799360,21cyclictest2849140-21runrttasks12:36:371
252428799360,20cyclictest2656536-21if_enp4s0.309:24:071
252428799359,18cyclictest0-21swapper/110:02:101
2524287993527,6cyclictest2680842-21apt-get09:49:001
252428799351,20cyclictest2769928-21runrttasks11:18:211
252428799351,18cyclictest2585881-21runrttasks08:09:511
252428799350,20cyclictest2561544-21runrttasks07:46:441
252428799350,20cyclictest2524762-21runrttasks07:13:581
2524285993527,5cyclictest2541861-21/usr/sbin/munin07:29:190
2524285993527,5cyclictest2471458-21kworker/u8:0+flush-8:007:24:050
2524285993525,7cyclictest278-21systemd-journal09:55:000
2524287993420,12cyclictest390-21dbus-daemon11:40:001
252428799340,24cyclictest0-21swapper/111:34:181
252428799340,21cyclictest2551178-21taskset07:34:241
252428799340,21cyclictest2531585-21runrttasks07:17:231
2524285993427,5cyclictest2524339-21cat07:10:020
25194962344,10sleep20-21swapper/207:05:232
2524291993326,5cyclictest278-21systemd-journal11:05:002
2524291993326,5cyclictest278-21systemd-journal11:05:002
2524287993323,8cyclictest2803422-21ntpq11:49:141
252428799332,15cyclictest0-21swapper/112:34:031
2524287993321,10cyclictest2758899-21needreboot11:04:131
2524287993321,10cyclictest2758899-21needreboot11:04:131
2524287993321,10cyclictest0-21swapper/109:54:061
2524287993311,9cyclictest0-21swapper/110:35:201
252428799330,18cyclictest2839199-21runrttasks12:25:421
252428799330,18cyclictest2536742-21runrttasks07:21:411
2524285993330,2cyclictest2656002-21kworker/u8:3+flush-8:009:29:040
252428599332,26cyclictest2829442-21kworker/0:2+events12:21:370
252428599332,26cyclictest2704973-21kworker/0:0+events10:20:250
252428599332,26cyclictest2541365-21kworker/0:1+events09:01:290
252428799328,15cyclictest0-21swapper/109:01:271
2524287993221,8cyclictest0-21swapper/108:59:081
252428799321,19cyclictest2591339-21runrttasks08:18:501
252428799321,18cyclictest576-21runrttasks09:34:211
252428799321,18cyclictest2760221-21tr11:09:041
252428799321,17cyclictest2700458-21runrttasks10:07:311
252428799320,19cyclictest2611010-21taskset08:37:241
252428799320,18cyclictest2780076-21sort11:29:031
252428799320,18cyclictest2616455-21aten2_r5power_v08:44:051
252428799320,18cyclictest2596318-21runrttasks08:23:521
252428799320,17cyclictest2705288-21runrttasks10:11:291
2524285993228,2cyclictest2695131-21systemd-run10:00:010
2524285993227,3cyclictest2600724-21cron08:25:010
2524285993224,6cyclictest2536128-21cron07:20:000
252428599322,25cyclictest2704973-21kworker/0:0+events11:50:570
252428599321,26cyclictest2704973-21kworker/0:0+events10:58:370
2524291993126,4cyclictest2715369-21kworker/u8:0+events_unbound10:25:012
252428799312,17cyclictest421rcuog/210:24:531
2524287993115,14cyclictest2741929-21kthreadcore10:49:091
252428799311,19cyclictest421rcuog/212:03:591
252428799310,17cyclictest2774856-21runrttasks11:23:191
252428799310,17cyclictest2556355-21sed07:40:011
2524285993127,2cyclictest2561965-21cpuspeed_turbos07:49:040
2524285993126,3cyclictest2714869-21systemd-run10:20:000
2524285993126,3cyclictest2675317-21cron09:40:000
2524287993018,10cyclictest0-21swapper/111:59:141
252428799301,18cyclictest0-21swapper/109:41:471
252428799301,18cyclictest0-21swapper/109:41:471
252428599307,19cyclictest2541365-21kworker/0:1+events10:05:050
2524285993026,2cyclictest2625903-21apt-key08:50:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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