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2026-06-07 - 21:17

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
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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 50 highest latencies:
System rack5slot4s.osadl.org (updated Sun Jun 07, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165696121820,6sleep30-21swapper/308:15:393
164458321810,3sleep375-21kworker/3:1-events08:00:423
158954699641,61cyclictest1-21systemd11:42:140
1589548996157,3cyclictest1850086-21kworker/u8:2+flush-8:011:42:371
1589551995949,7cyclictest1704890-21systemd-journal11:42:392
1589551995532,20cyclictest1740722-21cp09:40:002
1589548995545,8cyclictest1676014-21kworker/u8:2+flush-8:008:55:461
1589548995346,5cyclictest1784997-21kworker/u8:1+events_unbound11:00:501
1589548995144,5cyclictest1758112-21kworker/u8:0+events_unbound11:45:461
1589548995143,6cyclictest1784997-21kworker/u8:1+flush-8:010:30:471
1589548995044,4cyclictest753075-21kworker/u8:0+flush-8:007:35:451
1589548994944,3cyclictest1758112-21kworker/u8:0+events_unbound10:45:501
1589548994939,8cyclictest1838993-21ntpq11:15:451
1589548994843,4cyclictest1676014-21kworker/u8:2+events_unbound09:35:421
1589548994842,4cyclictest753075-21kworker/u8:0+flush-8:007:20:501
1589548994842,3cyclictest1758112-21kworker/u8:0+events_unbound10:35:481
1589546994836,9cyclictest1704890-21systemd-journal12:20:400
1589551994728,16cyclictest1704890-21systemd-journal09:53:562
1589548994742,4cyclictest1715596-21kworker/u8:1+events_unbound09:15:451
1589548994742,3cyclictest1850086-21kworker/u8:2+flush-8:011:35:481
1589548994740,5cyclictest1850086-21kworker/u8:2+flush-8:012:35:461
1589548994641,4cyclictest1784997-21kworker/u8:1+flush-8:011:10:381
1589548994641,3cyclictest1758112-21kworker/u8:0+events_unbound10:15:391
1589548994641,3cyclictest1758112-21kworker/u8:0+events_unbound10:15:391
1589548994640,4cyclictest1527706-21kworker/u8:2+events_unbound07:10:471
1589548994639,5cyclictest1890193-21kworker/u8:3+events_unbound12:15:441
1589548994634,9cyclictest1848886-21ntpq11:25:441
1589546994638,6cyclictest1784997-21kworker/u8:1+flush-8:010:30:460
1589546994634,9cyclictest1799274-21ntpq10:35:440
1589548994540,4cyclictest1631055-21kworker/u8:3+events_unbound08:20:531
1589548994539,5cyclictest1758112-21kworker/u8:0+events_unbound10:40:511
1589548994539,4cyclictest1631055-21kworker/u8:3+events_unbound08:25:511
1589548994539,4cyclictest1631055-21kworker/u8:3+events_unbound08:25:511
1589548994538,5cyclictest753075-21kworker/u8:0+flush-8:007:55:471
1589548994538,5cyclictest1701177-21kworker/u8:3+flush-8:011:20:461
1589548994536,7cyclictest1785579-21/usr/sbin/munin10:25:471
1589548994536,7cyclictest1675114-21ntpq08:30:441
1589551994433,9cyclictest1704890-21systemd-journal12:00:372
1589548994440,3cyclictest1665766-21kworker/u8:0+events_unbound08:45:321
1589548994439,4cyclictest1631055-21kworker/u8:3+events_unbound08:10:451
1589548994438,4cyclictest1890193-21kworker/u8:3+flush-8:012:20:451
1589548994437,5cyclictest1758112-21kworker/u8:0+flush-8:010:20:451
1589548994436,6cyclictest1758112-21kworker/u8:0+flush-8:011:55:461
1589548994338,4cyclictest1890193-21kworker/u8:3+flush-8:012:10:461
1589548994338,4cyclictest1721427-21kworker/u8:0+events_unbound09:30:491
1589548994335,6cyclictest1701177-21kworker/u8:3+events_unbound09:25:431
1589546994333,8cyclictest1769606-21ntpq10:05:440
1589546994332,9cyclictest753075-21kworker/u8:0+flush-8:008:00:440
1589548994238,3cyclictest1758112-21kworker/u8:0+events_unbound10:05:011
1589548994235,5cyclictest1850086-21kworker/u8:2+flush-8:012:00:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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