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2026-09-02 - 10:11

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 Wed Sep 02, 2026 00:42:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151670399602,36cyclictest1630432-21ssh23:16:071
1516703995243,5cyclictest1548196-21systemd-run20:55:011
1516703995130,5cyclictest171rcu_preempt00:26:071
1516703994637,6cyclictest0-21swapper/119:40:011
1516702994640,4cyclictest1542295-21latency_hist20:35:020
1516704994538,3cyclictest0-21swapper/221:21:112
1516704994536,6cyclictest3847961-21cups-browsed22:26:102
1516702994535,8cyclictest1553820-21needreboot21:11:050
1516704994438,3cyclictest0-21swapper/200:21:102
1516703994329,11cyclictest1627838-21timerwakeupswit23:11:171
1516702994335,5cyclictest420-21avahi-daemon22:23:140
1516704994235,3cyclictest0-21swapper/223:41:062
1516704994235,3cyclictest0-21swapper/200:01:182
1516703994231,8cyclictest3847961-21cups-browsed19:16:001
151670299422,31cyclictest1676194-21modprobe00:31:040
1516704994130,7cyclictest420-21avahi-daemon21:51:292
1516703994133,4cyclictest0-21swapper/122:00:001
1516703994132,6cyclictest1590389-21if_wlan022:11:011
1516702994134,4cyclictest1574181-21grep21:45:000
151670299412,29cyclictest1645727-21ssh23:41:070
1516704994033,4cyclictest0-21swapper/223:35:012
1516704994032,4cyclictest1591748-21kworker/u8:3-xprtiod22:15:012
1516703994032,4cyclictest0-21swapper/121:16:061
1516703994031,5cyclictest1530201-21systemd-run19:55:011
1516703994030,8cyclictest421-21dbus-daemon22:30:021
1516702994033,4cyclictest0-21swapper/023:11:080
1516704993932,4cyclictest1656766-21kthreadd00:00:022
1516703993931,5cyclictest694-21cron00:00:011
1516703993931,5cyclictest1568151-21latency_hist21:35:021
1516703993931,5cyclictest1568151-21latency_hist21:35:021
1516703993928,8cyclictest1679109-21latency00:36:011
1516702993932,5cyclictest1636815-21sendmail_mailtr23:26:190
1516702993931,5cyclictest1609252-21mailstats22:41:120
1516702993927,9cyclictest3847961-21cups-browsed21:56:260
1516702993926,10cyclictest0-21swapper/022:16:190
1516704993832,3cyclictest0-21swapper/222:41:062
1516704993832,3cyclictest0-21swapper/219:26:052
151670499382,26cyclictest665-21snmpd21:31:272
151670499382,26cyclictest665-21snmpd21:31:272
1516703993830,5cyclictest1002-21mta-sts-daemon21:23:271
1516702993833,3cyclictest1653748-21kworker/u8:12-xprtiod00:00:010
1516704993728,5cyclictest1000-21mta-sts-daemon20:21:052
1516703993730,4cyclictest1002-21mta-sts-daemon00:16:091
1516703993729,5cyclictest1542199-21systemd-run20:35:011
1516703993726,8cyclictest1563723-21unixbench_singl21:26:171
1516703993712,18cyclictest420-21avahi-daemon23:51:061
1516704993630,3cyclictest0-21swapper/220:06:042
1516704993627,5cyclictest1624878-21unixbench_multi23:06:172
1516703993630,3cyclictest0-21swapper/123:10:011
1516703993629,4cyclictest1659773-21grep00:05:001
1516703993629,4cyclictest1540693-21munin-plugin-st20:30:001
1516703993629,4cyclictest1540693-21munin-plugin-st20:30:001
1516703993628,5cyclictest1527719-21fschecks_time19:46:011
1516703993622,7cyclictest1642599-21sh23:36:041
1516702993631,3cyclictest1516701-21cyclictest19:20:020
1516702993630,4cyclictest1565045-21latency_hist21:30:020
1516702993629,5cyclictest1-21systemd22:30:020
1516702993627,7cyclictest1545189-21munin-plugin-st20:45:020
1516702993627,6cyclictest1652195-21timerandwakeup23:51:160
1516702993616,5cyclictest12650irq/32-eth020:11:050
1516704993528,5cyclictest0-21swapper/221:40:002
1516704993528,5cyclictest0-21swapper/221:40:002
1516704993527,5cyclictest1542114-21unixbench_singl20:31:222
1516703993527,5cyclictest1569871-21unixbench_multi21:36:271
1516703993527,5cyclictest1569871-21unixbench_multi21:36:271
1516703993527,4cyclictest1002-21mta-sts-daemon19:31:061
1516703993521,10cyclictest0-21swapper/100:21:071
151670299353,22cyclictest1667124-21ssh00:16:080
1516702993528,5cyclictest1633269-21ssh23:21:010
1516702993528,3cyclictest0-21swapper/022:01:120
1516702993525,7cyclictest0-21swapper/022:11:040
1516702993524,7cyclictest12650irq/32-eth022:56:040
1516702993524,7cyclictest12650irq/32-eth022:56:040
1516702993516,12cyclictest12650irq/32-eth023:36:050
151670499343,6cyclictest171rcu_preempt23:11:082
1516704993429,2cyclictest0-21swapper/200:15:002
1516704993428,3cyclictest0-21swapper/223:36:042
1516704993428,3cyclictest0-21swapper/222:00:002
1516704993428,2cyclictest0-21swapper/223:51:042
1516704993427,5cyclictest1614000-21latency_hist22:50:022
1516704993427,5cyclictest0-21swapper/221:10:562
1516704993426,5cyclictest1668973-21systemd-run00:20:012
1516704993426,5cyclictest1616986-21systemd-run22:55:012
1516704993426,5cyclictest1604745-21munin-run22:35:012
1516703993428,3cyclictest0-21swapper/123:00:571
1516703993426,5cyclictest1000-21mta-sts-daemon22:24:411
151670399342,26cyclictest1615106-21rm22:51:041
1516702993428,4cyclictest1521071-21tail19:21:190
1516702993426,5cyclictest1574823-21aten_r2power_po21:45:570
1516702993421,9cyclictest567-21gdbus21:31:070
1516702993421,9cyclictest567-21gdbus21:31:070
151670299341,24cyclictest1550542-21sshd21:01:050
151670499337,6cyclictest171rcu_preempt23:26:102
1516704993328,2cyclictest0-21swapper/219:20:012
1516704993327,3cyclictest0-21swapper/200:30:022
1516704993326,4cyclictest1556593-21sort21:16:032
1516704993325,3cyclictest0-21swapper/200:31:042
1516704993324,6cyclictest421-21dbus-daemon20:40:022
1516704993324,6cyclictest1596141-21head22:20:552
1516704993322,8cyclictest1650598-21idleruntime-cro23:50:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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