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2026-05-07 - 15:20

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 Thu May 07, 2026 12:43:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1593074995751,4cyclictest1637192-21grep09:20:010
1593075995439,11cyclictest1055-21mta-sts-daemon09:20:501
1593074995446,5cyclictest1-21systemd11:15:020
1593074995142,6cyclictest790599-21cups-browsed10:20:490
1593075994636,6cyclictest1718243-21latency_hist11:00:031
1593074994538,4cyclictest1633117-21kworker/u8:8-events_unbound09:55:490
1593074994534,7cyclictest421-21dbus-daemon07:30:010
1593076994436,5cyclictest1637181-21sendmail09:20:012
1593075994436,5cyclictest1713997-21munin-plugin-st10:55:011
1593074994332,9cyclictest1726095-21munin-plugin-st11:10:000
1593076994234,4cyclictest0-21swapper/210:35:012
1593074994235,4cyclictest1-21systemd07:45:020
1593075994133,5cyclictest1600558-21/usr/sbin/munin07:35:011
1593076994033,4cyclictest1728318-21kworker/u8:1-xprtiod12:00:542
1593076994033,3cyclictest0-21swapper/210:50:502
1593076994032,6cyclictest1603582-21systemd-run07:45:012
1593076994032,5cyclictest1794666-21idleruntime-cro12:35:012
1593076994030,8cyclictest1718074-21ssh11:00:022
1593075994032,5cyclictest1681747-21systemd-run10:15:011
1593075994032,5cyclictest1681747-21systemd-run10:15:011
1593075994031,6cyclictest1629049-21grep09:10:011
1593075994029,8cyclictest0-21swapper/111:40:501
1593074994033,5cyclictest0-21swapper/010:10:410
1593074994033,5cyclictest0-21swapper/010:10:410
1593074994032,5cyclictest790599-21cups-browsed11:36:520
1593074994032,5cyclictest790599-21cups-browsed11:36:520
1593074994032,5cyclictest659-21snmpd11:16:140
1593074994032,5cyclictest1-21systemd12:40:020
1593074994030,7cyclictest1665556-21cut09:55:020
1593076993932,3cyclictest0-21swapper/210:25:552
1593076993931,5cyclictest1626075-21systemd-run09:00:012
1593076993930,6cyclictest420-21avahi-daemon09:13:312
1593076993929,7cyclictest421-21dbus-daemon12:35:552
1593076993929,7cyclictest1735990-21timerwakeupswit11:21:022
1593075993930,6cyclictest1798695-21sendmail12:40:011
1593075993930,6cyclictest1-21systemd11:05:011
159307599392,28cyclictest1650627-21ssh09:35:481
159307599391,30cyclictest1743509-21ssh11:30:471
1593074993933,3cyclictest0-21swapper/012:25:480
1593074993932,5cyclictest421-21dbus-daemon10:50:020
1593074993932,4cyclictest1646019-21aten_r2power_vo09:30:380
1593074993932,4cyclictest1646019-21aten_r2power_vo09:30:380
1593074993930,6cyclictest790599-21cups-browsed09:13:420
1593074993930,6cyclictest420-21avahi-daemon10:02:260
1593074993930,5cyclictest1776902-21kworker/u8:0-xprtiod12:20:530
1593074993929,7cyclictest1691389-21mailstats10:25:570
1593076993830,5cyclictest1701912-21cron10:40:012
159307699381,31cyclictest1747634-21ssh11:35:512
159307699381,31cyclictest1747634-21ssh11:35:512
1593075993832,4cyclictest1593073-21cyclictest11:40:001
1593075993832,4cyclictest1593073-21cyclictest11:40:001
1593075993830,5cyclictest1794658-21ssh12:35:011
1593075993830,5cyclictest1689816-21cron10:25:011
1593075993824,10cyclictest1727856-21timerwakeupswit11:10:581
1593074993832,4cyclictest1770560-21cut12:05:010
1593074993826,9cyclictest0-21swapper/009:35:570
1593076993730,4cyclictest1669607-21idleruntime-cro10:00:012
1593076993728,6cyclictest790599-21cups-browsed12:07:182
1593076993728,6cyclictest790599-21cups-browsed12:07:182
1593076993726,8cyclictest1751580-21ntp_kernel_err11:40:472
1593075993728,6cyclictest421-21dbus-daemon09:55:011
1593075993728,6cyclictest1627544-21cron09:05:011
1593075993727,6cyclictest420-21avahi-daemon09:15:561
1593075993722,11cyclictest1658369-21idleruntime09:45:411
159307499374,18cyclictest171rcu_preempt10:35:530
1593074993730,4cyclictest1722051-21cron11:05:000
1593076993630,4cyclictest1744129-21unixbench_multi11:31:002
1593076993630,3cyclictest0-21swapper/211:55:572
1593076993629,3cyclictest0-21swapper/209:25:492
1593076993628,5cyclictest1601931-21unixbench_multi07:36:002
1593075993630,3cyclictest0-21swapper/107:55:011
1593074993619,14cyclictest1766581-21latency_hist12:00:020
1593076993529,3cyclictest0-21swapper/211:50:542
1593076993529,3cyclictest0-21swapper/210:20:002
1593076993527,6cyclictest695-21cron12:20:002
1593076993527,5cyclictest695-21cron09:25:012
1593076993527,5cyclictest1719947-21unixbench_singl11:01:002
1593076993525,7cyclictest1653458-21systemctl09:40:002
1593075993528,4cyclictest1705987-21kworker/u8:4-xprtiod11:55:461
1593075993528,4cyclictest0-21swapper/110:00:011
1593075993527,5cyclictest1767475-21if_eth012:00:421
1593075993527,5cyclictest1643127-21grep09:26:001
1593075993526,6cyclictest1690697-21sort10:25:411
1593074993527,5cyclictest1714529-21/usr/sbin/munin10:55:380
1593074993526,7cyclictest12350irq/32-eth011:20:510
1593076993428,3cyclictest0-21swapper/210:11:322
1593076993428,3cyclictest0-21swapper/210:11:322
1593076993426,5cyclictest1627449-21tail09:01:012
1593076993425,6cyclictest1675310-21switchtime10:06:002
1593076993425,6cyclictest1675310-21switchtime10:06:002
1593075993427,4cyclictest1051-21mta-sts-daemon11:15:361
1593075993424,6cyclictest1710078-21latency_hist10:50:021
159307599342,26cyclictest1695142-21sh10:30:481
159307499343,24cyclictest1642475-21ssh09:25:460
1593074993428,3cyclictest0-21swapper/007:20:010
1593074993427,5cyclictest790599-21cups-browsed08:45:500
1593074993426,6cyclictest1683385-21switchtime10:15:590
159307499342,28cyclictest1771948-21rm12:05:530
159307499342,28cyclictest1771948-21rm12:05:530
1593074993414,5cyclictest0-21swapper/011:45:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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