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2025-12-25 - 20:58
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack0slot2.osadl.org (updated Thu Dec 25, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
365764726352,8sleep50-21swapper/507:07:055
3658098995145,5cyclictest650-21systemd-journal09:09:077
365759624939,7sleep40-21swapper/407:06:244
3658098994841,6cyclictest3690865-21latency_hist07:24:077
3658091994038,2cyclictest3836259-21kworker/u16:5+events_unbound09:09:224
365771423929,7sleep60-21swapper/607:08:026
36485382383,29sleep70-21swapper/707:04:107
3658098993529,5cyclictest3991039-21latency_hist09:59:077
3658098993529,5cyclictest3991039-21latency_hist09:59:077
3658091993533,2cyclictest4039865-21kworker/u16:3+events_unbound10:59:064
3658091993432,2cyclictest3657842-21kworker/u16:2+events_unbound07:14:234
39233432330,1chrt3923317-21munin-run09:24:077
3658098993130,0cyclictest0-21swapper/707:09:257
365809899310,30cyclictest3981400-21systemd-run09:54:077
3658097993128,3cyclictest4088304-21kworker/u16:2+flush-8:010:59:216
3658091993028,2cyclictest4156131-21kworker/u16:4+events_unbound11:54:204
3658098992928,0cyclictest0-21swapper/709:44:337
3658091992927,2cyclictest4039576-21kworker/u16:2+events_unbound10:24:204
3658097992825,2cyclictest3884786-21kworker/u16:2+events_unbound09:14:216
3658098992721,5cyclictest4185011-21latency_hist11:39:077
3658098992625,0cyclictest0-21swapper/710:49:257
3658098992624,1cyclictest0-21swapper/712:04:287
3658097992623,2cyclictest3609487-21kworker/u16:3+flush-8:007:09:336
3658098992524,0cyclictest0-21swapper/709:09:377
3658097992522,2cyclictest3667656-21kworker/u16:4+flush-8:007:59:266
3658091992523,2cyclictest4185045-21kworker/u16:1+events_unbound11:49:214
3658091992523,2cyclictest4068928-21kworker/u16:0+events_unbound11:29:314
3658091992523,2cyclictest4068928-21kworker/u16:0+events_unbound11:29:314
3658091992523,2cyclictest3690637-21kworker/u16:0+events_unbound07:39:224
3658098992322,0cyclictest0-21swapper/709:34:247
3658098992317,5cyclictest650-21systemd-journal10:29:077
3658093992319,3cyclictest4156131-21kworker/u16:4+flush-8:011:29:335
3658093992319,3cyclictest4156131-21kworker/u16:4+flush-8:011:29:335
3658091992321,2cyclictest3951414-21kworker/u16:0+events_unbound09:59:214
3658098992221,0cyclictest0-21swapper/710:29:357
3658097992220,2cyclictest4039865-21kworker/u16:3+flush-8:011:24:076
3658093992220,2cyclictest3836259-21kworker/u16:5+events_unbound08:49:225
3658093992218,3cyclictest4107347-21pool-/usr/libex10:59:015
3658091992220,2cyclictest4185045-21kworker/u16:1+events_unbound12:29:214
3658091992220,2cyclictest3800410-21kworker/u16:2+events_unbound08:44:254
3658091992220,2cyclictest3667656-21kworker/u16:4+events_unbound08:29:224
3658098992120,0cyclictest0-21swapper/712:09:217
3658097992119,2cyclictest4185045-21kworker/u16:1+flush-8:011:59:336
3658093992119,2cyclictest29997-21kworker/u16:2+flush-8:012:14:225
3658091992119,2cyclictest3836259-21kworker/u16:5+events_unbound08:54:324
3658091992119,2cyclictest3826104-21kworker/u16:0+events_unbound08:39:314
3658091992119,2cyclictest3788061-21kworker/u16:0+events_unbound08:19:264
3658091992119,2cyclictest3788061-21kworker/u16:0+events_unbound08:19:264
3658097992017,2cyclictest3972029-21kworker/u16:4+events_unbound10:39:216
3658097992017,2cyclictest3719996-21kworker/u16:2+events_unbound08:04:336
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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