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2026-06-17 - 07:44

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 Wed Jun 17, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
192300021440,3sleep375-21kworker/3:1+events22:05:013
1746770996945,22cyclictest1981761-21ntpq23:00:360
1746770996943,23cyclictest1779227-21diskstats19:40:280
1746781996863,4cyclictest1746524-21kworker/u8:3+flush-8:020:30:422
1746770996744,20cyclictest2041120-21ntpq00:00:390
1746770996743,21cyclictest1847225-21ntpq20:45:390
1746781996458,4cyclictest1746524-21kworker/u8:3+events_unbound19:40:432
1746777996454,8cyclictest2006501-21ntpq23:25:371
1746770996453,8cyclictest1971899-21ntpq22:50:380
19480822630,3chrt75-21kworker/3:1+events22:30:023
1746781996255,5cyclictest2037276-21kworker/u8:0+events_unbound00:25:392
1746777996251,9cyclictest1931921-21ntpq22:10:411
1746770996238,8cyclictest1704890-21systemd-journal21:40:010
1746781996156,4cyclictest1798556-21kworker/u8:2+flush-8:021:50:292
1746777996151,8cyclictest1777768-21ntpq19:35:371
1746781996055,3cyclictest1932393-21kworker/u8:2+events_unbound22:15:382
1746777996051,7cyclictest2007668-21/usr/sbin/munin23:30:361
1746770995951,6cyclictest1812402-21ntpq20:10:380
1746770995951,6cyclictest1812402-21ntpq20:10:380
1746770995847,8cyclictest1901825-21ntpq21:40:370
1746777995748,7cyclictest1886736-21ntpq21:25:381
1746770995739,5cyclictest2001517-21ntpq23:20:360
1746777995647,7cyclictest1962688-21latency_hist22:45:011
1746770995647,6cyclictest2076408-21ntpq00:35:410
1746781995551,3cyclictest1798556-21kworker/u8:2+flush-8:021:10:432
1746781995450,3cyclictest1932393-21kworker/u8:2+events_unbound00:00:442
1746770995447,5cyclictest1997515-21latency_hist23:20:000
1746777995344,7cyclictest2042490-21/usr/sbin/munin00:05:381
1746777995344,7cyclictest1951971-21ntpq22:30:401
1746777995343,8cyclictest1967001-21ntpq22:45:381
1746770995343,7cyclictest1967879-21latency_hist22:50:000
1746781995247,3cyclictest1798556-21kworker/u8:2+flush-8:020:00:442
1746777995242,8cyclictest2017555-21/usr/sbin/munin23:40:381
1746777995241,9cyclictest2066298-21ntpq00:25:381
1746781995146,3cyclictest1892213-21kworker/u8:3+flush-8:022:00:272
1746770995143,5cyclictest1767845-21ntpq19:25:340
1746770995141,7cyclictest2051244-21ntpq00:10:410
1746781995044,4cyclictest1746524-21kworker/u8:3+events_unbound19:50:392
1746777995038,10cyclictest1704890-21systemd-journal20:40:001
1746781994944,3cyclictest1798556-21kworker/u8:2+events_unbound21:05:312
1746777994940,7cyclictest1797578-21ntpq19:55:341
1746781994844,3cyclictest923664-21kworker/u8:0+events_unbound19:20:392
1746777994839,7cyclictest1877989-21/usr/sbin/munin21:20:401
1746777994838,7cyclictest2071298-21ntpq00:30:421
1746770994839,6cyclictest1833314-21latency_hist20:35:010
18235712470,4sleep00-21swapper/020:25:260
1746770994737,8cyclictest1817324-21ntpq20:15:360
1746781994642,3cyclictest1902224-21kworker/u8:1+events_unbound21:40:452
1746777994636,7cyclictest1891731-21ntpq21:30:421
1746770994636,7cyclictest1857984-21latency_hist21:00:020
1746770994438,4cyclictest2022514-21apt-get23:45:230
1746781994339,3cyclictest1932393-21kworker/u8:2+flush-8:022:25:402
1746777994334,7cyclictest1848384-21/usr/sbin/munin20:50:411
1746777994232,8cyclictest2061442-21ntpq00:20:411
1746777994232,7cyclictest1902964-21/usr/sbin/munin21:45:351
1746770994232,7cyclictest1704890-21systemd-journal19:21:080
1746781994134,5cyclictest1932977-21base6422:15:012
1746777994134,5cyclictest2027447-21apt-get23:50:231
1746770994127,9cyclictest1892213-21kworker/u8:3+flush-8:023:55:360
1746770994126,11cyclictest1932798-21apt-get22:15:000
18352622400,4sleep0882-21mta-sts-daemon20:35:330
1746777994032,6cyclictest2037034-40logrotate00:00:001
1746770994029,9cyclictest1838793-21diskstats20:40:280
1746770993933,4cyclictest1798556-21kworker/u8:2+events_unbound21:55:010
1746770993926,10cyclictest1704890-21systemd-journal21:50:010
1746770993924,11cyclictest1947020-21kworker/u8:1+events_unbound22:55:390
174677099391,34cyclictest1982722-21kworker/0:1+events23:40:370
19571072370,2sleep3471rcuc/322:35:423
1746777993729,6cyclictest1758663-21apt-get19:20:011
174677099379,22cyclictest1803496-21kworker/0:0+events20:20:230
1746770993729,5cyclictest1947868-21latency_hist22:30:000
1746770993711,23cyclictest1882695-21kworker/0:0+events23:05:410
1746781993629,5cyclictest1704890-21systemd-journal23:35:002
174677099369,21cyclictest1982722-21kworker/0:1+events23:30:240
1746770993628,5cyclictest2037276-21kworker/u8:0+flush-8:000:15:260
1746770993627,6cyclictest1932393-21kworker/u8:2+flush-8:023:35:310
1746770993625,9cyclictest1807484-21ntpq20:05:360
1746770993625,9cyclictest1807484-21ntpq20:05:360
174677099356,24cyclictest1872804-21kworker/0:1+events21:20:220
1746770993524,8cyclictest1772868-21ntpq19:30:400
1746770993523,8cyclictest1704890-21systemd-journal23:15:000
1746781993430,3cyclictest1947020-21kworker/u8:1+events_unbound22:35:352
1746781993428,4cyclictest1892213-21kworker/u8:3+flush-8:021:45:052
1746777993429,4cyclictest1746524-21kworker/u8:3+flush-8:020:30:371
1746777993428,4cyclictest1803750-21apt-get20:05:241
1746777993428,4cyclictest1803750-21apt-get20:05:231
1746777993425,7cyclictest1783957-21/usr/sbin/munin19:45:421
1746777993425,6cyclictest1803474-21latency_hist20:05:011
174677099342,26cyclictest1803496-21kworker/0:0+events20:05:010
1746781993327,4cyclictest1704890-21systemd-journal21:40:012
1746777993327,4cyclictest1908178-21apt-get21:50:241
1746777993323,8cyclictest1818801-21diskstats20:20:261
1746770993329,3cyclictest2037276-21kworker/u8:0+flush-8:000:05:090
1746770993327,4cyclictest1962276-21grep22:40:450
1746770993310,21cyclictest2022262-21kworker/0:2+events00:21:200
1746781993226,4cyclictest1798556-21kworker/u8:2+events_unbound20:15:072
1746781993224,6cyclictest1704890-21systemd-journal19:20:002
1746777993226,4cyclictest923664-21kworker/u8:0+flush-8:019:21:481
1746777993225,5cyclictest1987910-21apt-get23:10:251
1746777993221,8cyclictest1704890-21systemd-journal23:46:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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