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2026-08-22 - 22:41

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 Sat Aug 22, 2026 12:42:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1915831998368,10cyclictest1954643-21diskmemload09:14:062
1915831998368,10cyclictest1954643-21diskmemload09:14:062
1915829995947,9cyclictest0-21swapper/011:40:010
1915830995548,4cyclictest1001-21mta-sts-daemon07:36:031
1915830995446,3cyclictest0-21swapper/109:14:071
1915830995446,3cyclictest0-21swapper/109:14:071
1915831995025,21cyclictest0-21swapper/209:35:012
1915831995020,5cyclictest0-21swapper/212:20:012
1915831994920,6cyclictest0-21swapper/207:20:592
1915831994838,7cyclictest420-21avahi-daemon12:05:522
1915830994837,7cyclictest1-21systemd09:35:011
1915829994840,5cyclictest2059433-21grep12:05:540
1915831994725,19cyclictest0-21swapper/211:00:502
191583099476,30cyclictest1986853-21ssh10:06:051
1915829994718,10cyclictest1927327-21ntpq07:46:020
1915829994718,10cyclictest1927327-21ntpq07:46:020
1915831994638,5cyclictest1945890-21systemd-run08:50:012
1915831994636,7cyclictest421-21dbus-daemon07:55:012
1915831994626,17cyclictest0-21swapper/211:00:012
1915830994633,8cyclictest1977690-21ssh09:51:051
1915829994638,6cyclictest2056188-21aten_r2power_po12:00:510
1915831994523,5cyclictest1003-21mta-sts-daemon10:44:142
1915831994522,5cyclictest1002-21mta-sts-daemon10:01:142
191583099452,28cyclictest1959182-21ssh09:20:581
1915829994538,5cyclictest1933896-21systemd-run08:10:020
1915829994532,7cyclictest1951896-21systemd-run09:10:010
1915829994532,7cyclictest1951896-21systemd-run09:10:010
191582999452,33cyclictest2068890-21ssh12:20:590
1915831994334,5cyclictest0-21swapper/209:16:002
1915831994333,6cyclictest2026335-21ntp_offset11:11:012
1915830994332,7cyclictest1958019-21awk09:20:001
1915830994331,9cyclictest1933887-21sh08:10:021
1915830994329,11cyclictest2001846-21needreboot10:30:581
1915829994336,4cyclictest1939901-21systemd-run08:30:010
1915829994335,6cyclictest2025108-21/usr/sbin/munin11:10:020
191583199424,13cyclictest428-21mta-sts-daemon07:16:052
1915831994235,4cyclictest1002-21mta-sts-daemon10:29:572
1915831994234,5cyclictest1951877-21diskmemload09:36:152
1915831994221,4cyclictest1932571-21latency_hist08:05:022
1915830994230,8cyclictest420-21avahi-daemon09:57:201
191583099422,32cyclictest2008085-21ssh10:41:031
1915829994234,4cyclictest0-21swapper/011:15:560
1915829994233,5cyclictest2001546-21fschecks_time10:30:540
1915831994133,4cyclictest2031240-21kworker/u8:7-xprtiod11:41:122
1915830994131,6cyclictest420-21avahi-daemon11:08:261
191583099412,30cyclictest2005065-21ssh10:36:051
1915829994135,4cyclictest12650irq/32-eth009:14:050
1915829994135,4cyclictest12650irq/32-eth009:14:050
1915829994130,8cyclictest151ktimers/010:10:580
1915831994031,6cyclictest2029576-21sh11:16:102
1915831994031,6cyclictest2004384-21aten_r2power_po10:35:512
1915829994030,8cyclictest2010672-21sh10:45:550
1915829994026,8cyclictest1951877-21diskmemload09:46:050
1915829994026,10cyclictest12650irq/32-eth009:50:590
191582999401,28cyclictest1968424-21sh09:36:040
1915829994012,18cyclictest2008039-21ssh10:41:010
1915831993933,2cyclictest0-21swapper/209:56:072
191583099393,31cyclictest2017174-21ssh10:56:021
1915830993931,5cyclictest2019632-21aten_r2power_po11:00:501
191583099392,31cyclictest2074974-21ssh12:31:021
191583099392,29cyclictest1968406-21sshd09:36:021
1915830993830,5cyclictest421-21dbus-daemon10:25:021
1915830993826,6cyclictest0-21swapper/110:01:011
191583099382,31cyclictest2044646-21ssh11:41:031
1915829993828,7cyclictest2064687-21cron12:15:010
191582999382,28cyclictest2014199-21ssh10:51:060
191582999381,29cyclictest1980575-21ssh09:55:590
1915831993727,5cyclictest0-21swapper/211:06:132
1915830993726,7cyclictest1121621-21cups-browsed11:12:161
191583099372,28cyclictest627-21lldpd08:31:051
1915830993712,17cyclictest421-21dbus-daemon12:16:001
1915830993710,6cyclictest171rcu_preempt09:06:011
1915830993710,6cyclictest171rcu_preempt09:06:011
1915829993731,3cyclictest0-21swapper/011:26:040
1915829993728,6cyclictest2055579-21systemd-run12:00:010
1915829993728,6cyclictest1121621-21cups-browsed11:24:030
1915829993723,11cyclictest1916350-21fschecks_time07:10:520
1915829993719,8cyclictest1948260-21ntpq08:56:010
191583199364,26cyclictest2056963-21ssh12:01:072
1915831993631,2cyclictest0-21swapper/207:40:012
1915831993628,5cyclictest2047923-21switchtime11:46:102
1915831993628,5cyclictest1915852-21latency_hist07:10:022
1915831993627,5cyclictest1003-21mta-sts-daemon11:56:042
1915830993629,3cyclictest0-21swapper/108:36:051
1915830993627,5cyclictest2061645-21cron12:10:001
1915830993625,7cyclictest1989935-21proc_pri10:11:061
191583099362,29cyclictest2056783-21ssh12:01:021
1915830993618,13cyclictest2032789-21grep11:21:111
1915829993631,3cyclictest1950362-21kworker/u8:9-xprtiod11:00:010
1915829993625,8cyclictest1923323-21munin-plugin-st07:35:020
1915829993610,8cyclictest1986551-21memory10:05:560
1915829993610,18cyclictest0-21swapper/007:56:040
1915831993527,5cyclictest1003-21mta-sts-daemon10:24:572
1915831993527,5cyclictest1001-21mta-sts-daemon10:19:362
1915831993522,10cyclictest2034963-21cpu11:25:532
1915830993527,5cyclictest2051183-21unixbench_multi11:51:121
1915830993527,5cyclictest2051183-21unixbench_multi11:51:121
1915830993526,6cyclictest2014352-21systemctl10:51:101
1915830993526,6cyclictest0-21swapper/109:00:001
1915829993514,17cyclictest2026401-21ld11:11:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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