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2026-04-28 - 14:51

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 Apr 28, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
389534921500,5sleep30-21swapper/300:16:143
3588306995955,3cyclictest2117976-21kworker/u8:2+events_unbound19:36:211
3588306995854,3cyclictest3709269-21kworker/u8:1+events_unbound22:11:201
3588303995644,9cyclictest3788954-21diskstats22:31:060
3588306995552,2cyclictest3853120-21kworker/u8:3+events_unbound23:46:201
3588306995552,2cyclictest3777688-21kworker/u8:0+events_unbound23:06:101
3588306995551,3cyclictest3614944-21kworker/u8:3+events_unbound21:06:201
3588306995550,4cyclictest3768644-21kworker/u8:2+events_unbound22:16:201
3588303995445,6cyclictest3887807-21latency_hist00:10:010
3588306995248,3cyclictest2739554-21kworker/u8:0+events_unbound19:11:121
3588306995246,4cyclictest3877877-40logrotate00:00:011
3588303995243,7cyclictest3734280-21/usr/sbin/munin21:36:160
3588306995143,6cyclictest3629773-21latency_hist19:50:011
3588306995046,3cyclictest3777688-21kworker/u8:0+events_unbound23:26:211
3588306995046,3cyclictest3777688-21kworker/u8:0+events_unbound23:26:211
3588306995046,3cyclictest3614944-21kworker/u8:3+events_unbound22:06:161
3588306995040,7cyclictest3901860-21ntpq00:21:201
3588306994940,6cyclictest3757865-21ntpq21:56:171
3588306994845,2cyclictest3614944-21kworker/u8:3+events_unbound20:11:261
3588306994844,3cyclictest2739554-21kworker/u8:0+events_unbound19:26:231
3588303994842,5cyclictest3689255-21kworker/u8:0+flush-8:021:56:220
3588306994744,2cyclictest3614944-21kworker/u8:3+events_unbound20:56:051
3588306994743,3cyclictest3853120-21kworker/u8:3+events_unbound23:51:071
3588306994743,3cyclictest3843247-21kworker/u8:1+events_unbound00:06:261
3588306994743,3cyclictest3812675-21kworker/u8:3+events_unbound22:56:191
3588306994743,3cyclictest3709269-21kworker/u8:1+events_unbound21:20:391
3588306994743,3cyclictest3709269-21kworker/u8:1+events_unbound21:16:231
3588306994743,3cyclictest3614944-21kworker/u8:3+events_unbound20:26:101
3588306994740,5cyclictest3857871-21latency_hist23:40:001
3588303994738,6cyclictest3684279-21latency_hist20:45:010
3588306994643,2cyclictest3614944-21kworker/u8:3+events_unbound21:01:091
3588306994642,3cyclictest3878121-21kworker/u8:3+events_unbound00:36:161
3588306994642,3cyclictest3777688-21kworker/u8:0+events_unbound23:16:061
3588306994642,3cyclictest3709269-21kworker/u8:1+events_unbound21:31:221
3588306994642,3cyclictest3709269-21kworker/u8:1+events_unbound21:11:111
3588306994642,3cyclictest3614944-21kworker/u8:3+events_unbound20:21:131
3588306994642,3cyclictest2739554-21kworker/u8:0+events_unbound19:21:101
3588306994635,9cyclictest3743007-21ntpq21:41:161
3588303994641,4cyclictest3853120-21kworker/u8:3+flush-8:023:46:120
3588303994640,4cyclictest3798842-21diskstats22:41:040
3588303994638,5cyclictest3743894-21latency_hist21:45:000
3588303994636,8cyclictest280-21systemd-journal21:20:000
3588309994535,7cyclictest3887809-21awk00:10:002
3588306994541,3cyclictest3843247-21kworker/u8:1+events_unbound23:31:061
3588306994541,3cyclictest3777688-21kworker/u8:0+events_unbound22:41:071
3588303994537,6cyclictest280-21systemd-journal22:20:010
3588306994440,3cyclictest3812675-21kworker/u8:3+events_unbound23:01:191
3588306994440,3cyclictest3614944-21kworker/u8:3+events_unbound20:31:211
3588306994339,3cyclictest3614944-21kworker/u8:3+events_unbound21:51:071
3588306994339,3cyclictest3614944-21kworker/u8:3+events_unbound21:26:101
3588306994339,3cyclictest3614944-21kworker/u8:3+events_unbound19:51:071
3588306994339,3cyclictest3614944-21kworker/u8:3+events_unbound19:51:061
3588306994339,3cyclictest2117976-21kworker/u8:2+events_unbound20:06:201
3588306994334,7cyclictest3888110-21/usr/sbin/munin00:11:161
3588303994333,8cyclictest3853465-21diskstats23:36:050
3588306994239,2cyclictest3822955-21kworker/u8:2+events_unbound23:11:251
3588306994239,2cyclictest3614944-21kworker/u8:3+events_unbound19:56:081
3588306994238,3cyclictest3768644-21kworker/u8:2+events_unbound22:51:251
3588306994238,3cyclictest3614944-21kworker/u8:3+events_unbound22:01:101
3588306994238,3cyclictest3614944-21kworker/u8:3+events_unbound21:46:061
3588306994238,3cyclictest3614944-21kworker/u8:3+events_unbound21:46:061
3588306994234,6cyclictest280-21systemd-journal21:40:001
3588306994232,8cyclictest3623982-21ntpq19:41:161
3588303994235,6cyclictest3843247-21kworker/u8:1+flush-8:023:56:170
3588306994137,3cyclictest3878121-21kworker/u8:3+events_unbound00:31:211
3588303994137,3cyclictest3614944-21kworker/u8:3+flush-8:020:01:130
3588303994135,4cyclictest3614944-21kworker/u8:3+flush-8:021:01:080
3588303994131,8cyclictest3907589-21apt-get00:30:000
3588309994029,8cyclictest3659350-21awk20:20:012
3588306994036,3cyclictest3822955-21kworker/u8:2+events_unbound00:01:171
3588306994036,3cyclictest3674389-21kworker/u8:1+events_unbound20:36:071
3588306994036,3cyclictest3614944-21kworker/u8:3+events_unbound20:52:381
3588303994035,3cyclictest3614944-21kworker/u8:3+flush-8:022:06:130
3588303994030,8cyclictest3713086-21ntpq21:11:170
3588306993935,3cyclictest3614944-21kworker/u8:3+events_unbound20:00:391
3588303993935,3cyclictest3614944-21kworker/u8:3+flush-8:020:21:070
3588303993929,8cyclictest3843596-21diskstats23:26:070
3588303993929,8cyclictest3843596-21diskstats23:26:060
3588306993832,4cyclictest280-21systemd-journal22:25:001
3588306993828,3cyclictest3838390-21apt-get23:21:041
3588309993731,4cyclictest2739554-21kworker/u8:0+events_unbound19:15:032
3588306993733,3cyclictest3777688-21kworker/u8:0+events_unbound22:46:101
3588306993733,3cyclictest2117976-21kworker/u8:2+events_unbound19:17:021
3588306993727,8cyclictest280-21systemd-journal22:33:271
3588303993732,4cyclictest3812675-21kworker/u8:3+flush-8:023:01:070
3588303993729,6cyclictest280-21systemd-journal19:30:000
3588303993722,4cyclictest0-21swapper/021:21:060
3588309993630,4cyclictest3907801-21base6400:30:012
3588306993632,3cyclictest3887520-21kworker/u8:0+events_unbound00:16:091
3588306993632,3cyclictest3822955-21kworker/u8:2+events_unbound23:43:391
3588306993632,3cyclictest3614944-21kworker/u8:3+events_unbound20:15:381
3588303993632,3cyclictest3614944-21kworker/u8:3+flush-8:020:11:070
3588303993631,4cyclictest2117976-21kworker/u8:2+flush-8:020:51:220
3588303993630,4cyclictest2117976-21kworker/u8:2+flush-8:020:36:120
3588303993627,6cyclictest3818290-21latency_hist23:00:010
3588309993530,3cyclictest2117976-21kworker/u8:2+flush-8:019:21:262
3588306993531,3cyclictest3822955-21kworker/u8:2+events_unbound00:28:391
3588306993531,3cyclictest3768644-21kworker/u8:2+events_unbound22:35:371
3588306993531,3cyclictest2117976-21kworker/u8:2+events_unbound20:46:381
3588303993530,4cyclictest2117976-21kworker/u8:2+flush-8:020:06:080
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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