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2026-08-08 - 05:09

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 08, 2026 00:43:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4163600995946,9cyclictest420-21avahi-daemon21:25:592
4163600995543,7cyclictest265-21systemd-journal23:38:422
4163599995447,4cyclictest0-21swapper/100:00:011
416360099522,38cyclictest76471-21ssh23:05:542
4163599995239,8cyclictest420-21avahi-daemon00:05:541
4163599995141,6cyclictest420-21avahi-daemon23:25:081
4163599995141,6cyclictest420-21avahi-daemon23:25:081
4163600994940,6cyclictest132745-21sendmail00:40:012
4163599994943,2cyclictest0-21swapper/122:40:011
4163600994637,5cyclictest117600-21ssh00:15:012
4163600994637,5cyclictest0-21swapper/222:40:512
4163598994332,6cyclictest91620-21ssh23:30:570
4163598994332,6cyclictest91620-21ssh23:30:570
4163600994233,6cyclictest421-21dbus-daemon23:45:522
4163600994228,9cyclictest694-21cron21:10:012
4163599994236,3cyclictest0-21swapper/123:00:561
4163599994231,7cyclictest108584-21cups-browsed00:02:241
4163598994232,7cyclictest87380-21munin-run23:25:000
4163598994232,7cyclictest87380-21munin-run23:25:000
4163600994133,5cyclictest72372-21latency_hist23:00:022
4163600994130,7cyclictest2454516-21cups-browsed21:58:082
4163599994135,3cyclictest0-21swapper/121:20:011
4163599994131,6cyclictest5621-21diskmemload22:11:041
4163599994131,6cyclictest5621-21diskmemload22:11:041
4163599994131,3cyclictest0-21swapper/100:15:521
4163599994130,8cyclictest96427-21sendmail23:40:001
4163598994133,5cyclictest34343-21mailstats21:56:010
4163600994033,3cyclictest0-21swapper/200:00:012
4163600994032,4cyclictest0-21swapper/223:50:502
4163598994018,18cyclictest12750irq/33-eth000:25:560
4163600993932,4cyclictest20049-21kworker/u8:3-xprtiod21:40:422
4163600993932,4cyclictest20049-21kworker/u8:3-xprtiod21:40:422
4163600993929,7cyclictest421-21dbus-daemon20:20:022
4163599993932,3cyclictest0-21swapper/121:40:531
4163599993932,3cyclictest0-21swapper/121:40:531
4163599993930,4cyclictest0-21swapper/122:50:531
4163598993933,4cyclictest42016-21idleruntime-cro22:10:000
4163598993933,4cyclictest42016-21idleruntime-cro22:10:000
4163598993932,4cyclictest1134-21systemd-run20:55:010
416360099389,7cyclictest5621-21diskmemload23:40:532
4163600993830,5cyclictest60175-21sendmail22:40:012
4163600993828,4cyclictest0-21swapper/200:20:522
4163599993832,3cyclictest0-21swapper/122:00:011
4163599993831,4cyclictest1003-21mta-sts-daemon21:13:031
4163599993830,5cyclictest70275-21needreboot22:55:491
4163599993830,5cyclictest126707-21systemd-run00:30:021
4163599993830,4cyclictest24083-21latency_hist21:40:031
4163599993830,4cyclictest24083-21latency_hist21:40:031
4163599993829,6cyclictest421-21dbus-daemon22:50:011
4163598993831,4cyclictest2609-21munin-plugin-st21:00:010
4163600993729,4cyclictest0-21swapper/223:30:462
4163600993729,4cyclictest0-21swapper/223:30:462
4163600993726,7cyclictest420-21avahi-daemon21:37:242
4163600993726,7cyclictest420-21avahi-daemon21:37:242
4163600993724,9cyclictest129855-21latency_hist00:35:032
4163599993729,5cyclictest4183075-21cron20:15:001
4163599993728,6cyclictest55218-21ntp_kernel_err22:30:511
4163598993729,4cyclictest0-21swapper/000:05:540
4163600993628,4cyclictest1003-21mta-sts-daemon22:30:412
4163600993626,6cyclictest567-21gdbus23:05:022
4163599993630,3cyclictest0-21swapper/120:40:011
4163599993629,4cyclictest1001-21mta-sts-daemon23:55:021
4163599993628,4cyclictest0-21swapper/123:25:001
4163599993628,4cyclictest0-21swapper/123:25:001
416359999362,27cyclictest61355-21ssh22:40:551
4163599993619,4cyclictest78327-21kworker/u8:12-rpciod23:34:051
4163599993619,4cyclictest78327-21kworker/u8:12-rpciod23:34:051
416359899364,26cyclictest115751-21diskmemload00:10:540
4163598993627,7cyclictest9272-21aten_r2power_po21:15:430
4163598993627,6cyclictest2454516-21cups-browsed22:14:070
4163598993627,6cyclictest2454516-21cups-browsed22:14:070
4163600993528,4cyclictest11871-21latency_hist21:20:022
4163600993526,6cyclictest439-21systemd-logind19:35:012
4163599993528,3cyclictest0-21swapper/121:46:001
4163599993528,3cyclictest0-21swapper/121:46:001
4163599993527,5cyclictest439-21systemd-logind19:15:011
4163599993524,8cyclictest54103-21latency_hist22:30:021
416359999351,27cyclictest127881-21ssh00:30:571
4163598993529,4cyclictest7286-21unixbench-2d21:11:030
4163598993526,6cyclictest93867-21sshd23:35:420
4163598993526,6cyclictest2454516-21cups-browsed21:33:320
4163598993525,7cyclictest55206-21ntp_kernel_err22:30:510
4163600993427,4cyclictest0-21swapper/220:21:002
4163600993425,6cyclictest4189014-21head20:31:042
4163600993425,6cyclictest4173970-21grep19:41:012
4163600993424,5cyclictest0-21swapper/223:27:202
4163600993424,5cyclictest0-21swapper/223:27:202
4163599993427,4cyclictest4193577-21cron20:50:011
4163599993426,5cyclictest4187888-21aten_r2power_en20:30:421
4163599993425,6cyclictest1000-21mta-sts-daemon22:09:191
4163599993425,6cyclictest1000-21mta-sts-daemon22:09:191
4163598993428,3cyclictest0-21swapper/021:10:020
4163598993427,4cyclictest0-21swapper/023:40:430
4163598993426,5cyclictest58431-21ssh22:35:580
4163598993425,6cyclictest121085-21/usr/sbin/munin00:20:500
4163600993325,5cyclictest45159-21ssh22:15:022
4163600993325,5cyclictest45159-21ssh22:15:022
4163600993325,5cyclictest113668-21sh00:07:042
4163600993321,8cyclictest66621-21/usr/sbin/munin22:50:452
4163599993326,4cyclictest132721-21munin-run00:40:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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