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2026-05-21 - 03:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot4s.osadl.org (updated Thu May 21, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1575425994534,8cyclictest1674781-21latency_hist20:45:011
1575433993937,1cyclictest1757865-21fwupd22:00:473
1575421993730,5cyclictest335557-21systemd-journal23:05:000
1575430993530,3cyclictest335557-21systemd-journal20:01:082
157543099351,33cyclictest1643406-21true20:15:002
157543099351,33cyclictest1643406-21true20:15:002
1575425993428,4cyclictest335557-21systemd-journal22:00:461
1575430993329,3cyclictest1515413-21kworker/u8:1+flush-259:019:15:162
1575421993329,2cyclictest1626885-21kworker/u8:3+flush-259:020:05:240
1575430993228,3cyclictest1841014-21kworker/u8:0+flush-259:023:35:152
1575425993228,3cyclictest1536687-21kworker/u8:4+flush-259:019:20:171
1575425993225,5cyclictest335557-21systemd-journal20:52:091
1575421993228,3cyclictest335557-21systemd-journal23:46:090
1575421993228,3cyclictest1840955-21apt-get23:25:000
1575433993025,4cyclictest335557-21systemd-journal19:52:103
1575430993026,3cyclictest1542690-21kworker/u8:2+flush-259:019:40:252
1575430993025,4cyclictest335557-21systemd-journal20:26:092
1575425993025,4cyclictest1825425-21kworker/u8:0+flush-259:023:15:181
1575425993025,3cyclictest1654354-21/usr/sbin/munin20:25:141
1575430992921,6cyclictest335557-21systemd-journal22:05:002
1575430992921,6cyclictest1626885-21kworker/u8:3+flush-259:020:40:312
1575421992923,4cyclictest509-21rs:main0
1575430992822,4cyclictest1753070-21latency_hist22:00:012
1575425992821,5cyclictest335557-21systemd-journal19:30:011
1575421992824,3cyclictest1841014-21kworker/u8:0+events_unbound23:33:110
157542199281,25cyclictest1-21systemd19:44:080
1575433992721,5cyclictest335557-21systemd-journal22:50:003
1575430992722,3cyclictest335557-21systemd-journal21:10:102
1575425992722,3cyclictest1836066-21apt-get23:20:111
1575421992723,3cyclictest1542690-21kworker/u8:2+events_unbound19:30:090
1575421992721,4cyclictest335557-21systemd-journal19:17:080
1575433992621,3cyclictest1815585-21diskstats23:00:143
1575433992618,6cyclictest1768575-21latency_hist22:15:003
1575425992620,4cyclictest1877509-21cp00:00:001
1575421992622,3cyclictest1882359-21kworker/u8:4+events_unbound00:37:080
1575421992622,3cyclictest1669851-21kworker/u8:0+events_unbound21:19:100
1575430992518,5cyclictest1846544-21latency_hist23:30:012
1575425992519,4cyclictest509-21rs:main1
1575421992520,4cyclictest1542690-21kworker/u8:2+events_unbound19:35:110
1575421992520,3cyclictest1696005-21kworker/u8:1+flush-259:021:55:230
1575421992518,5cyclictest1784110-21latency_hist22:30:000
157542199251,22cyclictest335557-21systemd-journal00:00:490
1575433992418,4cyclictest1784349-21/usr/sbin/munin22:30:143
1575430992419,3cyclictest1617170-21base6419:50:012
1575430992418,4cyclictest335557-21systemd-journal21:15:382
1575425992420,3cyclictest1888143-21/usr/sbin/munin00:10:121
1575425992418,4cyclictest335557-21systemd-journal21:42:091
1575425992415,8cyclictest1784112-21latency_hist22:30:001
1575421992421,2cyclictest1542690-21kworker/u8:2+flush-259:020:05:000
1575421992420,3cyclictest1626885-21kworker/u8:3+events_unbound20:40:280
1575421992419,4cyclictest1841014-21kworker/u8:0+events_unbound00:20:120
1575421992419,4cyclictest1542690-21kworker/u8:2+events_unbound19:45:180
1575421992419,3cyclictest1835551-21kworker/u8:1+events_unbound00:00:010
1575421992418,5cyclictest335557-21systemd-journal23:14:090
1575433992319,3cyclictest1841014-21kworker/u8:0+flush-259:000:15:153
1575433992319,3cyclictest1626885-21kworker/u8:3+events_unbound20:05:153
1575433992318,4cyclictest1626885-21kworker/u8:3+events_unbound20:00:183
1575430992317,5cyclictest1877968-21diskstats00:00:142
1575425992317,5cyclictest1918022-21ntpq00:35:211
1575421992320,2cyclictest1696005-21kworker/u8:1+flush-259:022:05:190
1575421992319,3cyclictest1712244-21kworker/u8:5+events_unbound21:32:100
1575421992319,3cyclictest1696005-21kworker/u8:1+flush-259:021:05:210
1575421992319,3cyclictest1626886-21kworker/u8:4+events_unbound19:55:260
1575421992319,3cyclictest1536687-21kworker/u8:4+events_unbound19:10:170
1575421992317,4cyclictest335557-21systemd-journal23:30:000
1575433992218,3cyclictest1773750-21kworker/u8:1+events_unbound22:20:153
1575433992218,3cyclictest1680155-21kworker/u8:4+flush-259:021:10:183
1575433992215,5cyclictest1747916-21latency_hist21:55:013
1575430992218,3cyclictest1732685-21kworker/u8:2+flush-259:021:40:142
1575430992218,2cyclictest1669851-21kworker/u8:0-ext4-rsv-conversion21:05:002
1575425992216,4cyclictest1898497-21/usr/sbin/munin00:20:181
1575421992219,2cyclictest1659529-21kworker/u8:1+events_unbound20:30:220
1575421992218,3cyclictest1669851-21kworker/u8:0+flush-259:021:01:390
1575421992218,3cyclictest1669851-21kworker/u8:0+events_unbound20:59:110
1575421992217,4cyclictest1841014-21kworker/u8:0+events_unbound23:36:090
1575421992217,4cyclictest1732685-21kworker/u8:2+flush-259:021:55:010
1575421992216,3cyclictest335557-21systemd-journal20:30:000
1575433992117,3cyclictest1815384-21kworker/u8:2+events_unbound23:10:243
1575433992117,3cyclictest1752270-21kworker/u8:3+flush-259:022:35:163
1575433992117,3cyclictest1626885-21kworker/u8:3+flush-259:020:20:163
1575433992115,4cyclictest509-21rs:main3
157542599218,11cyclictest1664804-21cpuspeed_turbos20:35:131
1575421992118,2cyclictest1778921-21kworker/u8:4+flush-259:022:50:000
1575421992118,2cyclictest1752270-21kworker/u8:3+flush-259:023:05:220
1575421992117,3cyclictest1835551-21kworker/u8:1+events_unbound00:10:130
1575421992117,3cyclictest1752270-21kworker/u8:3+events_unbound22:36:110
1575421992117,3cyclictest1696005-21kworker/u8:1+events_unbound22:00:220
1575421992115,4cyclictest1685126-21latency_hist20:55:010
1575433992017,2cyclictest1542690-21kworker/u8:2+events_unbound19:40:153
1575433992016,3cyclictest1542690-21kworker/u8:2+events_unbound20:15:183
1575433992016,3cyclictest1536687-21kworker/u8:4+flush-259:019:30:163
1575433992014,4cyclictest1717194-21/usr/sbin/munin21:25:143
1575433992013,5cyclictest1856821-21latency_hist23:40:013
1575430992018,2cyclictest1882359-21kworker/u8:4+flush-259:000:35:202
1575430992016,3cyclictest1752270-21kworker/u8:3+flush-259:022:35:142
1575430992016,3cyclictest1626885-21kworker/u8:3+flush-259:020:05:212
1575430992016,2cyclictest1722141-21turbostat.cron21:30:002
1575430992015,4cyclictest1542690-21kworker/u8:2+events_unbound19:55:192
1575430992013,5cyclictest1867114-21latency_hist23:50:012
1575430992013,5cyclictest1668716-21ntpq20:35:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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