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2026-06-24 - 16:05

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 Jun 24, 2026 12:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
563877996456,5cyclictest1-21systemd11:25:010
563878995848,6cyclictest3953742-21cups-browsed11:17:271
563878995641,11cyclictest3953742-21cups-browsed08:20:011
563877995444,7cyclictest3953742-21cups-browsed11:25:420
563878994941,5cyclictest596888-21systemd-run09:00:021
563878994840,5cyclictest667748-21ssh11:00:021
563878994840,5cyclictest667748-21ssh11:00:021
56387799452,36cyclictest625708-21ssh09:50:320
563879994435,6cyclictest1-21systemd10:45:012
563879994335,5cyclictest726248-21ssh12:35:022
563879994234,5cyclictest610767-21unixbench_multi09:25:412
563879994234,5cyclictest595343-21cron08:55:012
563877994235,5cyclictest1-21systemd12:25:010
563879994135,3cyclictest0-21swapper/208:30:322
563877994134,4cyclictest716976-21ssh12:20:010
563878994031,6cyclictest3953742-21cups-browsed10:40:341
563877994032,5cyclictest724798-21head12:30:420
563877994030,7cyclictest618444-21ssh09:40:010
563877994030,7cyclictest618444-21ssh09:40:010
563877994029,8cyclictest589376-21systemd-run08:35:010
563878993931,5cyclictest574090-21timerandwakeup07:40:501
563877993930,6cyclictest655443-21kworker/u8:4-xprtiod12:10:330
56387799392,32cyclictest647247-21ssh10:25:310
56387799391,33cyclictest668782-21ssh11:00:310
56387799391,33cyclictest668782-21ssh11:00:310
563879993830,5cyclictest584896-21systemd-run08:20:012
563879993830,5cyclictest3953742-21cups-browsed11:03:202
563879993830,5cyclictest3953742-21cups-browsed11:03:202
563879993827,8cyclictest680085-21ssh11:20:012
563878993828,6cyclictest420-21avahi-daemon09:48:361
563877993830,5cyclictest421-21dbus-daemon09:20:020
563879993732,2cyclictest0-21swapper/212:00:012
563879993731,3cyclictest0-21swapper/207:20:012
563879993728,6cyclictest3953742-21cups-browsed09:21:362
563878993729,5cyclictest652328-21ssh10:35:011
563877993732,3cyclictest621555-21cron09:45:000
563877993730,4cyclictest572893-21kworker/u8:17+xprtiod07:40:010
563877993730,4cyclictest572893-21kworker/u8:17+xprtiod07:40:010
563877993728,6cyclictest656201-21kernelversion10:40:250
563879993628,5cyclictest599860-21diskmemload09:30:362
563879993627,6cyclictest587882-21systemd-run08:30:012
563878993628,5cyclictest3953742-21cups-browsed08:45:371
563878993625,8cyclictest717860-21latency12:20:261
563877993628,5cyclictest265-21systemd-journal07:15:010
563877993627,6cyclictest729296-21grep12:40:010
563877993621,7cyclictest12650irq/32-eth012:00:320
563877993620,14cyclictest151ktimers/010:50:360
563879993530,2cyclictest0-21swapper/211:25:012
563879993528,4cyclictest690603-21sendmail_mailtr11:35:432
563879993528,3cyclictest0-21swapper/211:35:022
563879993527,5cyclictest618489-21systemd-run09:40:022
563879993527,5cyclictest618489-21systemd-run09:40:022
563879993527,5cyclictest572860-21grep07:40:012
563879993527,5cyclictest572860-21grep07:40:012
563879993525,7cyclictest580375-21/usr/sbin/munin08:05:022
563879993525,7cyclictest420-21avahi-daemon09:46:122
563878993528,4cyclictest572849-21cron07:40:001
563878993528,4cyclictest572849-21cron07:40:001
563878993527,5cyclictest587748-21unixbench_multi08:25:431
563878993526,6cyclictest599860-21diskmemload10:25:421
563877993525,7cyclictest566852-21cron07:20:010
563877993512,16cyclictest151ktimers/008:55:280
563879993429,2cyclictest0-21swapper/210:20:012
563879993428,3cyclictest0-21swapper/212:30:022
563879993428,2cyclictest0-21swapper/212:20:332
563879993427,4cyclictest632389-21unixbench_multi10:00:432
563879993426,5cyclictest716991-21munin-plugin-st12:20:002
563879993423,8cyclictest711968-21sh12:10:352
563879993423,7cyclictest421-21dbus-daemon09:40:202
563878993428,3cyclictest0-21swapper/109:20:011
563878993428,3cyclictest0-21swapper/109:15:011
563878993424,8cyclictest668475-21sh11:00:261
563878993424,8cyclictest668475-21sh11:00:261
563877993428,4cyclictest678486-21timerwakeupswit11:15:420
56387999334,25cyclictest665724-21ssh10:55:312
56387999334,25cyclictest665724-21ssh10:55:312
56387999333,26cyclictest647344-21ssh10:25:352
563879993325,5cyclictest0-21swapper/211:05:402
563879993325,5cyclictest0-21swapper/211:05:402
563879993324,6cyclictest600915-21ntp_kernel_pll_09:10:312
56387999332,28cyclictest674971-21ssh11:10:322
56387899335,24cyclictest3953742-21cups-browsed07:15:381
563878993326,4cyclictest591170-21aten_r2power_en08:40:191
563878993326,3cyclictest0-21swapper/110:10:411
563878993325,5cyclictest726242-21unin-run12:35:011
563878993325,5cyclictest655444-21sh10:40:011
563878993325,5cyclictest621561-21cron09:45:001
563878993324,6cyclictest439-21systemd-logind10:05:011
563877993323,7cyclictest673907-21grep11:10:000
563877993323,7cyclictest673907-21grep11:10:000
563877993320,9cyclictest0-21swapper/010:00:250
563879993225,4cyclictest578861-21systemctl08:00:012
563879993224,3cyclictest0-21swapper/211:25:322
563879993223,5cyclictest599860-21diskmemload10:23:242
563879993221,8cyclictest629075-21switchtime09:55:412
563879993221,8cyclictest629075-21switchtime09:55:412
563879993221,8cyclictest599862-21munin-plugin-st09:10:022
563878993226,4cyclictest563876-21cyclictest11:05:221
563878993226,4cyclictest563876-21cyclictest11:05:221
563878993225,4cyclictest711270-21aten2.4-expect12:10:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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