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2026-05-06 - 13:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Wed May 06, 2026 00:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21001922910,2chrt471rcuc/323:20:013
1849444997262,7cyclictest1901663-21latency_hist20:00:011
1849447996446,16cyclictest2099961-21gpgv23:20:012
1849447996241,18cyclictest280-21systemd-journal00:08:242
1849440995748,7cyclictest1916791-21apt-get20:15:570
1849440995545,7cyclictest2045217-21latency_hist22:25:010
1849444995445,7cyclictest2150108-21apt-get00:10:581
1849444995144,5cyclictest2075440-21apt-get22:55:581
1849444995143,6cyclictest1966127-21kworker/u8:2+flush-8:021:06:161
1849444995043,5cyclictest1911870-21apt-get20:10:581
1849444995040,7cyclictest1975113-21ntpq21:11:121
19403672490,1sleep01940369-21missed_timers20:36:100
1849444994944,4cyclictest1813032-21kworker/u8:0+flush-8:021:26:161
1849444994839,7cyclictest1955350-21ntpq20:51:111
1849440994840,6cyclictest280-21systemd-journal00:40:010
1849440994839,6cyclictest2035325-21latency_hist22:15:010
21230842470,4chrt371rcuc/223:41:072
1849444994742,4cyclictest1839772-21kworker/u8:1+flush-8:021:01:141
1849444994738,6cyclictest1980921-21latency_hist21:20:011
1849440994640,5cyclictest1839772-21kworker/u8:1+events_unbound19:15:030
1849440994639,5cyclictest2159383-21kworker/u8:0+events_unbound00:26:020
1849444994537,6cyclictest1856833-21apt-get19:15:581
1849440994535,7cyclictest1951262-21latency_hist20:50:010
1849440994535,7cyclictest1951262-21latency_hist20:50:010
1849440994534,8cyclictest1849292-21latency_hist19:10:000
1849444994434,8cyclictest1905735-21ntpq20:01:101
1849444994339,3cyclictest1813032-21kworker/u8:0+flush-8:020:46:031
1849444994339,3cyclictest1813032-21kworker/u8:0+flush-8:020:46:021
1849444994337,4cyclictest1871187-21apt-get19:26:521
1849444994336,5cyclictest1931849-21apt-get20:30:561
1849444994336,5cyclictest1813032-21kworker/u8:0+flush-8:021:21:151
1849444994335,6cyclictest1817955-21kworker/u8:3+flush-8:019:11:081
1849444994334,7cyclictest1886919-21/usr/sbin/munin19:46:061
20855732420,2sleep375-21kworker/3:1-events23:06:013
1849447994231,8cyclictest1854661-21cat19:15:002
1849444994233,7cyclictest1880795-21ntpq19:36:111
1849440994233,7cyclictest2099835-21latency_hist23:20:010
1849444994137,3cyclictest2055054-21kworker/u8:3+flush-8:022:41:191
1849444994134,5cyclictest2104228-21kworker/u8:3+events_unbound23:21:161
1849444994030,7cyclictest1941377-21latency_hist20:40:011
1849444993934,4cyclictest1813032-21kworker/u8:0+events_unbound20:41:001
1849444993933,4cyclictest1995770-21kworker/u8:3+flush-8:022:11:011
1849440993932,5cyclictest1839772-21kworker/u8:1+flush-8:019:21:160
1849440993931,6cyclictest2050148-21apt-get22:30:000
1849447993823,13cyclictest2119800-21unixbench_singl23:36:152
1849444993831,5cyclictest280-21systemd-journal23:49:241
1849444993831,5cyclictest280-21systemd-journal00:28:261
1849444993831,5cyclictest2135273-21apt-get23:55:561
1849444993732,4cyclictest1839772-21kworker/u8:1+flush-8:019:51:021
1849444993731,4cyclictest2015525-21kworker/u8:1+flush-8:022:51:101
1849440993729,7cyclictest1995770-21kworker/u8:3+flush-8:021:56:150
1849440993728,6cyclictest1995743-21latency_hist21:35:010
1849444993630,5cyclictest1995770-21kworker/u8:3+flush-8:021:56:121
1849444993627,7cyclictest2158798-21ntpq00:16:101
1849440993629,5cyclictest2094055-21ntpq23:11:120
1849440993627,7cyclictest280-21systemd-journal23:30:000
1849440993626,7cyclictest2065222-21latency_hist22:45:010
1849447993523,9cyclictest2080072-21awk23:00:012
1849447993522,11cyclictest1907945-21kthreadcore20:06:052
184944799352,14cyclictest2110301-21apt-get23:30:592
1849447993521,12cyclictest2080506-21aten2_r5power_v23:00:592
1849447993521,12cyclictest1990452-21unixbench_singl21:26:182
184944799351,13cyclictest2030661-21apt-get22:10:582
1849444993531,3cyclictest2055054-21kworker/u8:3+events_unbound22:45:581
1849444993530,3cyclictest2115471-21apt-get23:35:561
1849444993528,5cyclictest2089630-21grep23:06:181
1849447993429,3cyclictest2104228-21kworker/u8:3+events_unbound23:25:022
1849447993427,5cyclictest1871475-21apt-get19:29:592
184944799342,11cyclictest2060617-21apt-get22:41:002
1849447993415,17cyclictest2089575-21unixbench_multi23:06:182
1849444993431,2cyclictest1996780-21irqrtprio21:36:031
1849444993428,4cyclictest1839772-21kworker/u8:1+flush-8:019:21:161
1849444993425,7cyclictest280-21systemd-journal23:55:001
1849440993429,4cyclictest2055054-21kworker/u8:3+events_unbound22:56:000
1849440993428,4cyclictest2055054-21kworker/u8:3+flush-8:022:46:010
1849440993425,7cyclictest280-21systemd-journal20:30:000
1849447993316,15cyclictest2054987-21unixbench_singl22:31:182
1849447993314,16cyclictest1980391-21wc21:16:162
1849444993328,4cyclictest2159383-21kworker/u8:0+events_unbound00:21:141
1849444993328,4cyclictest1871958-21kworker/u8:3+flush-8:020:21:131
1849440993325,5cyclictest2040243-21latency_hist22:20:000
184944799321,12cyclictest2169913-21apt-get00:30:582
1849447993211,2cyclictest0-21swapper/219:15:032
1849444993228,3cyclictest2055054-21kworker/u8:3+flush-8:022:36:091
1849444993224,6cyclictest2044335-21ntpq22:21:101
1849444993224,6cyclictest2015525-21kworker/u8:1+events_unbound00:06:021
1849440993226,4cyclictest2060272-21latency_hist22:40:010
1849440993226,4cyclictest1871958-21kworker/u8:3+events_unbound20:21:010
1849440993225,5cyclictest1817955-21kworker/u8:3+events_unbound19:11:050
1849440993223,6cyclictest2149785-21latency_hist00:10:010
184944799312,11cyclictest2163741-21ntpq00:21:102
1849447993118,11cyclictest2055886-21cpuspeed_turbos22:36:002
1849447993118,11cyclictest0-21swapper/222:30:002
184944799311,12cyclictest2164958-21apt-get00:26:002
1849444993126,4cyclictest2159383-21kworker/u8:0+flush-8:000:31:161
1849444993126,3cyclictest2179085-21unixbench_multi00:36:171
1849444993125,5cyclictest2030062-21kworker/u8:2+events_unbound22:30:011
1849444993124,5cyclictest2015525-21kworker/u8:1+events_unbound23:01:101
1849444993121,8cyclictest280-21systemd-journal19:45:001
1849440993124,6cyclictest2045442-21kworker/u8:0+flush-8:000:01:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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