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2026-05-07 - 02:17

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
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 Thu May 07, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19112992860,2chrt0-21swapper/223:41:042
1637769996657,6cyclictest1753708-21latency_hist21:05:010
1637773996357,4cyclictest1848107-21apt-get22:40:021
1637769996156,3cyclictest1714098-21kworker/u8:1+flush-8:023:11:010
1637769996152,7cyclictest280-21systemd-journal23:20:010
16419162600,1chrt1641919-21proc_pri19:11:130
1637774996050,8cyclictest280-21systemd-journal19:36:152
1637769996054,4cyclictest1848107-21apt-get22:40:010
1637769995952,5cyclictest280-21systemd-journal19:41:160
1637769995849,7cyclictest1779009-21apt-get21:30:550
1637769995750,6cyclictest1694082-21kworker/u8:3+flush-8:020:36:060
1637769995747,8cyclictest1848928-21diskstats22:40:590
17022992530,6sleep30-21swapper/320:11:073
1637773995347,4cyclictest1813610-21apt-get22:05:561
1637773995345,6cyclictest1913656-21apt-get23:45:561
1637774995246,4cyclictest280-21systemd-journal22:00:002
1637774995246,4cyclictest1928133-40logrotate00:00:002
1637769995142,6cyclictest1808362-21latency_hist22:00:010
1637773995042,6cyclictest1888559-21base6423:20:011
1637774994843,4cyclictest1642660-21kworker/u8:1+flush-8:019:56:082
1637773994841,4cyclictest1958624-21apt-get00:30:551
1637773994739,6cyclictest1842942-21apt-get22:35:011
163776999471,44cyclictest1-21systemd19:59:590
1637773994638,6cyclictest1773525-21latency_hist21:25:011
1637769994539,4cyclictest1714098-21kworker/u8:1+events_unbound22:26:030
1637769994538,4cyclictest1758931-21kworker/u8:0+flush-8:021:41:010
1637773994436,6cyclictest1888242-21store23:20:011
1637769994440,3cyclictest1642660-21kworker/u8:1+flush-8:019:36:140
1637769994436,6cyclictest1958070-21apt-get00:30:000
1637769994435,6cyclictest280-21systemd-journal00:10:010
1637774994338,4cyclictest1729202-21kworker/u8:2+flush-8:022:56:142
1637774994338,3cyclictest1758931-21kworker/u8:0+flush-8:021:11:172
1637773994336,5cyclictest1918564-21/usr/sbin/munin23:51:141
1637773994332,8cyclictest1762785-21ntpq21:11:111
1637769994338,4cyclictest1642660-21kworker/u8:1+flush-8:019:51:140
1637769994333,8cyclictest1918838-21diskstats23:50:580
1637773994236,4cyclictest1933430-21apt-get00:05:571
1637773994231,8cyclictest280-21systemd-journal00:13:341
1637769994235,6cyclictest801828-21kworker/u8:2+flush-8:019:15:030
1637769994234,5cyclictest1918271-21latency_hist23:50:010
1637773994132,7cyclictest280-21systemd-journal00:40:001
1637773994132,7cyclictest1783963-21apt-get21:35:541
1637773994132,6cyclictest1843493-21apt-get22:35:561
1637773994131,8cyclictest280-21systemd-journal23:09:591
1637769994135,4cyclictest1903746-21apt-get23:35:560
1637769994134,5cyclictest801828-21kworker/u8:2+flush-8:019:46:130
1637769994133,6cyclictest801828-21kworker/u8:2+flush-8:019:26:010
1637773994032,6cyclictest1953481-21apt-get00:25:551
1637773994031,6cyclictest280-21systemd-journal23:11:361
1637769994033,5cyclictest1754029-21apt-get21:05:570
16374882408,20sleep10-21swapper/119:08:341
16373952404,32sleep20-21swapper/219:07:232
1637774993934,3cyclictest1758931-21kworker/u8:0+flush-8:021:36:072
1637773993933,4cyclictest1714098-21kworker/u8:1+events_unbound22:21:161
1637773993930,7cyclictest280-21systemd-journal19:19:321
1637773993930,6cyclictest1858254-21latency_hist22:50:011
1637773993927,9cyclictest1708025-21ntpq20:16:081
1637769993934,3cyclictest1729202-21kworker/u8:2+events_unbound21:21:070
1637769993933,4cyclictest1778452-21apt-get21:30:010
1637769993932,6cyclictest1758931-21kworker/u8:0+flush-8:021:16:150
1637774993831,5cyclictest280-21systemd-journal22:40:002
1637774993831,5cyclictest280-21systemd-journal21:10:002
1637774993827,8cyclictest280-21systemd-journal21:16:362
1637773993833,4cyclictest801828-21kworker/u8:2+flush-8:019:31:151
1637769993834,3cyclictest1729202-21kworker/u8:2+events_unbound22:11:130
1637769993833,4cyclictest801828-21kworker/u8:2+flush-8:020:01:140
1637769993831,5cyclictest1714098-21kworker/u8:1+flush-8:023:06:010
1637773993731,4cyclictest1928467-21apt-get00:00:571
1637769993733,3cyclictest1758931-21kworker/u8:0+events_unbound22:24:370
1637769993731,4cyclictest1898196-21kworker/u8:3+flush-8:000:06:170
1637769993730,5cyclictest280-21systemd-journal20:12:320
1637774993628,6cyclictest280-21systemd-journal20:23:332
1637774993626,7cyclictest280-21systemd-journal19:25:012
1637773993629,6cyclictest1729202-21kworker/u8:2+flush-8:022:16:141
1637773993629,6cyclictest1729202-21kworker/u8:2+flush-8:022:16:141
163776999360,33cyclictest1-21systemd23:30:010
1637774993527,6cyclictest280-21systemd-journal22:50:012
1637773993529,4cyclictest1679234-21kworker/u8:0+flush-8:020:21:071
1637773993528,5cyclictest801828-21kworker/u8:2+flush-8:019:26:131
1637773993526,7cyclictest1699341-21apt-get20:10:571
1637773993525,8cyclictest1893303-21apt-get23:25:011
1637773993524,8cyclictest1683303-21ntpq19:51:091
1637769993530,4cyclictest1928388-21kworker/u8:2+flush-8:000:01:170
1637774993429,4cyclictest1642660-21kworker/u8:1+flush-8:019:26:142
1637774993425,7cyclictest280-21systemd-journal21:00:012
1637773993427,5cyclictest1793876-21apt-get21:45:551
1637769993429,4cyclictest1898196-21kworker/u8:3+flush-8:023:56:010
1637769993428,4cyclictest1758931-21kworker/u8:0+flush-8:022:51:040
1637769993424,8cyclictest1875982-21kworker/u8:0+flush-8:023:21:060
1637769993423,9cyclictest1813859-21diskstats22:06:020
1637773993325,5cyclictest1773838-21apt-get21:25:561
1637773993323,8cyclictest1714163-21/usr/sbin/munin20:26:081
1637773993323,8cyclictest1714163-21/usr/sbin/munin20:26:081
1637773993228,3cyclictest1868117-21cron23:00:001
1637773993227,4cyclictest801828-21kworker/u8:2+flush-8:019:46:011
1637773993225,5cyclictest1694383-21apt-get20:05:561
1637769993227,3cyclictest1813277-21cron22:05:000
1637769993225,5cyclictest1729202-21kworker/u8:2+flush-8:022:56:110
1637774993127,3cyclictest1694082-21kworker/u8:3+events_unbound20:26:112
1637774993127,3cyclictest1694082-21kworker/u8:3+events_unbound20:26:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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