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2026-08-31 - 06:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack2slot7s.osadl.org (updated Mon Aug 31, 2026 00:42:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1734667995040,7cyclictest421-21dbus-daemon21:31:132
173466799494,39cyclictest1857386-21ssh23:31:042
1734666994739,5cyclictest1828721-21cron22:45:011
1734665994740,4cyclictest1840933-21grep23:05:010
1734666994638,5cyclictest1772475-21head21:11:171
1734666994537,5cyclictest1749672-21systemd-run20:00:011
1734665994536,5cyclictest1874562-40systemctl00:00:010
1734666994437,4cyclictest1786021-21kworker/u8:2-rpciod21:50:011
1734666994436,5cyclictest1825710-21systemd22:40:021
1734665994438,4cyclictest1877613-21munin-run00:05:010
173466799434,33cyclictest1823944-21ssh22:36:132
1734666994336,3cyclictest0-21swapper/123:06:041
1734665994327,14cyclictest0-21swapper/020:20:010
1734666994214,8cyclictest171rcu_preempt21:41:061
1734665994236,4cyclictest1894650-21tail00:31:190
173466599422,21cyclictest171rcu_preempt20:51:090
173466599422,21cyclictest171rcu_preempt20:51:090
1734667994131,6cyclictest1769173-21systemd-run21:05:012
1734667994131,6cyclictest1-21systemd00:10:012
1734666994133,5cyclictest1804414-21latency_hist22:05:011
1734666994133,5cyclictest1804414-21latency_hist22:05:011
1734666994132,5cyclictest1847055-21systemd-run23:15:011
1734665994135,3cyclictest0-21swapper/021:36:090
1734667994035,2cyclictest0-21swapper/220:00:012
1734667994032,5cyclictest1792268-21latency_hist21:45:022
1734666994033,3cyclictest0-21swapper/123:16:041
1734666994032,5cyclictest1878106-21/usr/sbin/munin00:06:031
1734666994032,5cyclictest1776797-21systemd-run21:20:011
1734666994032,5cyclictest1776797-21systemd-run21:20:011
1734666994030,6cyclictest1744179-21sshd19:40:571
1734665994019,5cyclictest12750irq/33-eth022:56:090
1734667993931,5cyclictest1865446-21latency_hist23:45:022
1734667993931,5cyclictest1865446-21latency_hist23:45:022
1734666993932,4cyclictest1874534-21sendmail00:00:011
1734666993931,5cyclictest1868392-21cron23:50:001
1734666993931,5cyclictest1868392-21cron23:50:001
1734666993931,5cyclictest1769149-21cron21:05:001
1734666993931,5cyclictest1766133-21cron20:55:001
1734666993931,5cyclictest1766133-21cron20:55:001
1734666993930,5cyclictest0-21swapper/100:40:011
1734666993929,8cyclictest1894144-21ntp_offset00:31:101
1734665993926,10cyclictest0-21swapper/020:30:020
1734667993833,2cyclictest0-21swapper/222:56:092
1734666993832,3cyclictest0-21swapper/122:55:011
1734666993831,5cyclictest0-21swapper/122:20:551
1734666993829,6cyclictest1811141-21cpuspeed22:15:551
1734665993832,4cyclictest1813451-21munin-plugin-st22:20:010
1734665993829,7cyclictest0-21swapper/023:10:010
173466599382,32cyclictest151ktimers/000:06:040
1734665993822,6cyclictest4095404-21cups-browsed22:42:070
1734667993729,5cyclictest1767649-21sendmail21:00:002
1734667993728,6cyclictest1869523-21needreboot23:51:012
1734667993728,6cyclictest1869523-21needreboot23:51:012
1734667993728,6cyclictest1813667-21latency_hist22:20:032
1734666993731,3cyclictest0-21swapper/100:26:061
1734666993729,5cyclictest1871628-21latency_hist23:55:021
1734666993729,5cyclictest1871628-21latency_hist23:55:021
1734666993729,5cyclictest1860648-21processes23:36:131
1734665993733,2cyclictest0-21swapper/023:41:170
1734665993733,2cyclictest0-21swapper/023:41:170
1734665993732,3cyclictest0-21swapper/022:00:570
1734665993732,3cyclictest0-21swapper/022:00:570
1734665993732,2cyclictest0-21swapper/021:31:230
1734665993731,4cyclictest1845112-21needreboot23:11:010
1734665993729,5cyclictest420-21avahi-daemon21:56:570
1734665993728,7cyclictest1749637-21grep20:00:010
1734665993726,8cyclictest0-21swapper/022:10:020
1734665993715,8cyclictest12750irq/33-eth000:21:070
1734665993713,21cyclictest1777999-21ssh21:21:070
1734667993630,3cyclictest0-21swapper/221:40:012
1734667993629,3cyclictest0-21swapper/223:46:092
1734667993629,3cyclictest0-21swapper/223:46:092
1734667993628,5cyclictest1848800-21grep23:16:162
1734667993628,5cyclictest1799031-21uniq21:55:572
1734667993628,5cyclictest1782929-21grep21:30:012
1734667993627,6cyclictest1773912-21latency_hist21:15:032
1734667993626,6cyclictest1876358-21unixbench_multi00:01:222
1734666993630,3cyclictest0-21swapper/100:11:051
1734666993628,5cyclictest1795852-21telnet21:50:571
1734666993627,6cyclictest421-21dbus-daemon00:04:011
1734666993626,6cyclictest1003-21mta-sts-daemon21:21:051
1734665993628,4cyclictest1002-21mta-sts-daemon23:53:080
1734665993628,4cyclictest1002-21mta-sts-daemon23:53:080
1734665993620,12cyclictest151ktimers/019:41:030
1734667993527,3cyclictest0-21swapper/200:16:082
173466799351,29cyclictest1832999-21ssh22:51:052
1734666993524,7cyclictest4095404-21cups-browsed20:16:101
1734665993528,4cyclictest421-21dbus-daemon00:40:020
1734665993527,5cyclictest0-21swapper/021:30:010
1734665993523,9cyclictest0-21swapper/020:05:020
1734667993428,3cyclictest0-21swapper/221:10:012
1734667993427,4cyclictest1000-21mta-sts-daemon23:06:092
1734667993426,3cyclictest0-21swapper/222:11:072
1734666993427,4cyclictest1000-21mta-sts-daemon23:31:181
1734666993426,5cyclictest421-21dbus-daemon21:10:021
1734666993426,5cyclictest421-21dbus-daemon00:20:021
1734666993426,5cyclictest1743645-21munin-plugin-st19:40:001
1734666993426,5cyclictest1743645-21munin-plugin-st19:40:001
1734666993426,5cyclictest1736143-21cron19:15:011
1734666993421,5cyclictest1000-21mta-sts-daemon23:44:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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