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2026-05-25 - 23:23

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 May 25, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2399412710,2sleep3471rcuc/307:45:463
202631997058,9cyclictest1704890-21systemd-journal12:00:011
202629996659,5cyclictest187803-21kworker/u8:1+flush-8:009:30:580
202635996359,3cyclictest377299-21kworker/u8:2+flush-8:010:01:012
3520692610,1sleep1352072-21kthreadcore09:35:501
202629995955,3cyclictest3559123-21kworker/u8:2+flush-8:007:15:050
202631995750,5cyclictest239073-21apt-get07:41:371
202631995745,9cyclictest407818-21apt-get10:35:011
202629995748,7cyclictest392021-21ntpq10:15:540
202629995649,5cyclictest478310-21kworker/u8:0+flush-8:012:15:530
202635995549,4cyclictest407851-21kworker/u8:1+flush-8:011:45:582
202629995446,6cyclictest1704890-21systemd-journal12:40:000
202635995248,3cyclictest392608-21kworker/u8:0+flush-8:010:26:012
202635995246,4cyclictest398149-21kworker/u8:3+flush-8:011:10:482
202631995225,18cyclictest264100-21sh08:09:591
202629995245,5cyclictest398149-21kworker/u8:3+flush-8:011:10:550
202629995241,8cyclictest248394-21ntpq07:50:550
202635995147,3cyclictest478310-21kworker/u8:0+flush-8:012:15:592
202635995147,3cyclictest377299-21kworker/u8:2+events_unbound10:30:542
202635995146,4cyclictest187803-21kworker/u8:1+flush-8:010:16:002
202629995145,4cyclictest249535-21kworker/u8:0+flush-8:008:05:590
202629995139,10cyclictest518411-21diskstats12:25:460
202635995045,4cyclictest328289-21kworker/u8:0+flush-8:009:45:562
202635995045,4cyclictest209703-21kworker/u8:3+events_unbound07:20:592
202629995043,5cyclictest323305-21sed09:06:020
202635994945,3cyclictest303661-21kworker/u8:2+flush-8:009:05:542
202629994943,4cyclictest462400-21kworker/u8:2+flush-8:012:10:560
202635994845,2cyclictest427510-21kworker/u8:0+events_unbound11:25:502
202635994844,3cyclictest398149-21kworker/u8:3+flush-8:010:36:022
202631994825,12cyclictest433855-21apt-get11:00:401
202629994842,4cyclictest462400-21kworker/u8:2+flush-8:011:30:500
202629994842,4cyclictest377299-21kworker/u8:2+flush-8:010:40:570
202631994737,7cyclictest372383-21ntpq09:56:001
202629994740,4cyclictest521015-21kworker/u8:3+events_unbound12:35:000
202635994641,4cyclictest187803-21kworker/u8:1+events_unbound08:10:552
202635994538,5cyclictest427510-21kworker/u8:0+events_unbound11:05:582
202631994535,6cyclictest1704890-21systemd-journal10:55:461
202631994532,10cyclictest1704890-21systemd-journal08:10:481
202631994527,15cyclictest388300-21apt-get10:15:411
202629994539,4cyclictest187803-21kworker/u8:1+flush-8:010:11:010
4041092440,3sleep375-21kworker/3:1+events10:30:493
202635994440,3cyclictest427510-21kworker/u8:0+events_unbound10:51:012
202631994433,8cyclictest1704890-21systemd-journal11:11:091
202629994440,3cyclictest427510-21kworker/u8:0+flush-8:010:55:570
202629994437,5cyclictest3559123-21kworker/u8:2+flush-8:007:30:550
202629994433,9cyclictest439067-21diskstats11:05:460
2022562444,35sleep00-21swapper/007:07:200
202635994339,3cyclictest462400-21kworker/u8:2+flush-8:011:36:012
202635994339,3cyclictest263386-21kworker/u8:3+flush-8:009:11:032
202635994339,3cyclictest187803-21kworker/u8:1+flush-8:007:50:542
202629994336,5cyclictest407851-21kworker/u8:1+flush-8:010:45:570
202629994335,6cyclictest478310-21kworker/u8:0+events_unbound12:00:560
202629994335,6cyclictest462400-21kworker/u8:2+events_unbound11:45:490
202629994333,8cyclictest223399-21ntpq07:25:560
202635994238,3cyclictest187803-21kworker/u8:1+flush-8:009:55:472
202635994237,4cyclictest392608-21kworker/u8:0+flush-8:010:20:452
202635994236,5cyclictest187803-21kworker/u8:1+flush-8:008:41:002
202635994233,7cyclictest1704890-21systemd-journal09:44:592
202631994233,6cyclictest1704890-21systemd-journal11:53:481
202629994235,5cyclictest462400-21kworker/u8:2+flush-8:012:20:470
202629994233,7cyclictest263386-21kworker/u8:3+flush-8:008:20:560
202631994129,8cyclictest1704890-21systemd-journal08:58:471
202631994115,16cyclictest0-21swapper/112:30:001
202629994136,3cyclictest328289-21kworker/u8:0+events_unbound09:20:480
202629994135,5cyclictest407851-21kworker/u8:1+flush-8:011:00:560
202629994135,5cyclictest328289-21kworker/u8:0+flush-8:009:35:520
202629994135,4cyclictest3559123-21kworker/u8:2+events_unbound07:20:540
202635994029,9cyclictest238473-21ntpq07:40:552
202631994028,10cyclictest250299-21irqrtprio07:55:511
202629994033,6cyclictest462400-21kworker/u8:2+flush-8:012:05:560
202631993929,7cyclictest1704890-21systemd-journal10:10:461
202631993926,10cyclictest1704890-21systemd-journal09:25:471
202629993934,4cyclictest407851-21kworker/u8:1+flush-8:011:16:000
202629993932,5cyclictest303661-21kworker/u8:2+events_unbound08:55:570
202635993834,3cyclictest478310-21kworker/u8:0+events_unbound12:00:012
20263199386,23cyclictest589-21runrttasks09:10:201
202631993810,14cyclictest418728-21apt-get10:45:421
202629993832,4cyclictest263386-21kworker/u8:3+events_unbound08:45:440
202629993832,4cyclictest263386-21kworker/u8:3+events_unbound08:45:430
202629993831,5cyclictest263386-21kworker/u8:3+flush-8:008:25:480
202635993733,3cyclictest478310-21kworker/u8:0+flush-8:012:10:462
202631993728,6cyclictest517475-21grep12:21:021
202631993727,6cyclictest1704890-21systemd-journal08:35:461
202631993725,10cyclictest443466-21cron11:10:001
20263199371,24cyclictest244170-21taskset07:48:191
202629993733,3cyclictest268414-21kworker/u8:0+flush-8:008:15:590
202629993732,4cyclictest187803-21kworker/u8:1+flush-8:008:40:450
202629993732,3cyclictest187803-21kworker/u8:1+events_unbound09:41:000
202629993731,4cyclictest407851-21kworker/u8:1+events_unbound10:50:490
202629993730,5cyclictest478310-21kworker/u8:0+flush-8:011:55:550
202629993729,6cyclictest473336-21latency_hist11:40:010
202631993624,9cyclictest0-21swapper/110:35:591
20263199361,20cyclictest398167-21runrttasks10:25:191
20263199361,19cyclictest523023-21runrttasks12:30:031
20263199361,19cyclictest473341-21munin-run11:40:001
20263199360,17cyclictest256922-21kthreadcore08:00:491
202629993632,3cyclictest398149-21kworker/u8:3+events_unbound11:20:530
202629993631,4cyclictest328289-21kworker/u8:0+events_unbound09:15:490
202629993631,4cyclictest303661-21kworker/u8:2+events_unbound09:10:490
202629993630,4cyclictest328289-21kworker/u8:0+flush-8:010:00:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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