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2026-09-01 - 20:14

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 01, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29678852710,1chrt2967886-21basename12:17:280
27946142670,3chrt2794619-21fschecks_time09:22:321
2662874996345,15cyclictest2818622-21latency_hist09:45:010
2662874995538,14cyclictest2768994-21latency_hist08:55:010
28972712510,3sleep3575-21kworker/3:2+events11:02:393
2662874995031,17cyclictest2893030-21latency_hist11:00:000
2662874994822,23cyclictest2933563-21diskstats11:42:320
2662874994822,23cyclictest2933563-21diskstats11:42:310
2662878994741,5cyclictest2918261-21kworker/u8:3+flush-8:012:27:281
2662878994741,4cyclictest2863098-21latency_hist10:30:011
2662878994741,4cyclictest2852427-21kworker/u8:1+events_unbound10:42:351
2662874994738,6cyclictest2882878-21latency_hist10:50:000
2662878994641,4cyclictest2918261-21kworker/u8:3+events_unbound12:22:461
2662878994640,4cyclictest2918261-21kworker/u8:3+events_unbound12:12:311
2662878994541,3cyclictest2689277-21kworker/u8:0+events_unbound07:47:461
2662878994539,4cyclictest2728963-21kworker/u8:2+events_unbound08:37:461
2662878994440,3cyclictest1641982-21kworker/u8:1+events_unbound07:25:011
2662878994339,3cyclictest2769229-21kworker/u8:2+events_unbound09:17:431
2662878994339,3cyclictest1641982-21kworker/u8:1+events_unbound07:42:461
2662878994335,5cyclictest2748950-21latency_hist08:35:011
266287499420,28cyclictest1-21systemd07:28:430
2662874994125,13cyclictest2867750-21grep10:32:490
2662878994035,4cyclictest2918261-21kworker/u8:3+flush-8:012:02:321
2662878994034,4cyclictest2808942-21kworker/u8:0+flush-8:009:37:461
2662874994031,7cyclictest2877968-21latency_hist10:45:010
2662874994023,14cyclictest2808705-21systemd-run09:35:000
2662874994022,15cyclictest2674639-21latency_hist07:20:010
2662874994014,23cyclictest2967459-21latency_hist12:15:010
266287499400,24cyclictest1-21systemd11:20:530
2662880993927,9cyclictest275-21systemd-journal08:40:002
2662878993934,3cyclictest2748787-21kworker/u8:1+events_unbound09:12:321
2662878993933,5cyclictest2643172-21kworker/u8:3+events_unbound07:12:441
2662878993933,4cyclictest2912854-21kworker/u8:0+flush-8:011:37:341
2662878993933,4cyclictest2912854-21kworker/u8:0+flush-8:011:37:341
2662878993933,4cyclictest2898047-21kworker/u8:1+events_unbound11:52:411
2662878993833,4cyclictest2937642-21kworker/u8:2+events_unbound11:57:411
2662878993832,4cyclictest2842595-21kworker/u8:3+flush-8:010:52:421
2662878993832,4cyclictest2748787-21kworker/u8:1+flush-8:009:32:441
2662878993831,5cyclictest1641982-21kworker/u8:1+flush-8:007:57:441
2662874993828,8cyclictest2733353-21ntpq08:17:400
2662878993732,4cyclictest2643172-21kworker/u8:3+events_unbound09:07:401
2662878993731,4cyclictest1641982-21kworker/u8:1+flush-8:008:02:401
2662874993729,5cyclictest2982006-21grep12:27:460
2662874993729,5cyclictest2943206-21apt-get11:52:280
2662874993728,6cyclictest2927916-21latency_hist11:35:010
2662874993719,15cyclictest2763588-21grep08:47:480
2662878993632,3cyclictest2912854-21kworker/u8:0+events_unbound11:42:321
2662878993632,3cyclictest2912854-21kworker/u8:0+events_unbound11:42:321
2662878993629,5cyclictest275-21systemd-journal08:14:431
2662878993629,5cyclictest2643172-21kworker/u8:3+flush-8:007:32:331
2662874993619,15cyclictest0-21swapper/008:57:370
2662874993618,15cyclictest0-21swapper/009:22:420
2662874993617,17cyclictest0-21swapper/008:07:480
2662874993616,17cyclictest0-21swapper/011:07:410
2662878993530,3cyclictest2754203-21kworker/u8:0+events_unbound08:52:351
2662878993530,3cyclictest2748787-21kworker/u8:1+flush-8:009:47:331
2662878993529,4cyclictest2748787-21kworker/u8:1+events_unbound09:02:311
266287499359,2cyclictest0-21swapper/010:12:320
2662874993529,4cyclictest2739516-21apt-get08:27:270
2662874993519,13cyclictest0-21swapper/008:12:430
2662874993517,16cyclictest2829494-21irqcore09:57:360
2662874993517,16cyclictest2778925-21idleruntime-cro09:05:000
2662874993516,17cyclictest0-21swapper/010:37:390
2662874993516,17cyclictest0-21swapper/008:22:320
2662874993516,16cyclictest0-21swapper/009:07:430
2662874993514,18cyclictest0-21swapper/009:52:370
266287499351,12cyclictest2953093-21apt-get12:02:290
26582462354,9sleep10-21swapper/107:07:381
2662878993430,3cyclictest2882201-21kworker/u8:0+flush-8:010:57:431
2662878993429,4cyclictest2898047-21kworker/u8:1+events_unbound11:47:361
2662878993429,4cyclictest2898047-21kworker/u8:1+events_unbound11:47:361
2662878993428,4cyclictest2912854-21kworker/u8:0+flush-8:011:22:431
2662878993427,5cyclictest275-21systemd-journal10:08:511
2662874993427,5cyclictest2852427-21kworker/u8:1+flush-8:010:22:330
2662874993417,15cyclictest2918722-21tune2fs11:27:320
2662874993416,15cyclictest0-21swapper/007:52:470
2662874993414,18cyclictest2704188-21unixbench_singl07:47:480
266287499340,9cyclictest2928285-21sshd11:36:530
266287499340,9cyclictest2928285-21sshd11:36:530
2662878993328,3cyclictest2824187-21cpuspeed_turbos09:52:311
2662878993327,5cyclictest1641982-21kworker/u8:1+flush-8:008:07:361
2662878993327,4cyclictest2937642-21kworker/u8:2+events_unbound12:17:361
2662878993327,4cyclictest2643172-21kworker/u8:3+flush-8:008:22:441
2662878993326,5cyclictest275-21systemd-journal11:04:531
266287499332,9cyclictest2942086-21ntpq11:47:440
266287499332,9cyclictest2942086-21ntpq11:47:440
266287499332,11cyclictest2883315-21apt-get10:52:270
266287499331,9cyclictest2907385-21ntpq11:12:440
266287499331,9cyclictest2748212-21ntpq08:32:410
2662874993318,13cyclictest0-21swapper/009:46:480
2662874993317,14cyclictest0-21swapper/007:22:460
2662874993316,14cyclictest0-21swapper/008:42:380
2662874993313,18cyclictest0-21swapper/007:40:010
2662874993311,5cyclictest2716311-21cut08:02:340
266287499331,10cyclictest2852446-21ntpq10:17:410
266287499331,10cyclictest2713707-21/usr/sbin/munin07:57:450
2662880993222,8cyclictest2763817-21apt-get08:50:002
2662878993228,3cyclictest2748787-21kworker/u8:1+events_unbound10:02:311
2662878993226,5cyclictest2852427-21kworker/u8:1+events_unbound10:32:311
2662878993226,4cyclictest2852427-21kworker/u8:1+flush-8:010:22:371
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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