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2026-06-15 - 05:07

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 Mon Jun 15, 2026 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3618172996456,5cyclictest3782589-21diskmemload00:35:310
3618174995851,3cyclictest0-21swapper/200:15:292
3618174995341,8cyclictest1863115-21cups-browsed20:25:262
361817499526,40cyclictest3708141-21ssh22:35:242
3618174995045,2cyclictest0-21swapper/223:20:312
3618174995033,10cyclictest36-21ksoftirqd/223:25:232
3618174995025,21cyclictest3669970-21latency_hist21:35:012
361817499501,28cyclictest3672446-21ssh21:38:032
3618172995035,12cyclictest1-21systemd00:10:010
3618174994931,16cyclictest0-21swapper/223:20:012
3618172994942,5cyclictest1863115-21cups-browsed23:50:380
3618172994935,12cyclictest3744364-21cron23:35:010
3618174994723,4cyclictest3697718-21kworker/u8:4+rpciod23:00:022
3618174994721,3cyclictest0-21swapper/223:40:252
3618173994739,5cyclictest3759889-21ssh00:00:021
3618174994622,2cyclictest0-21swapper/220:10:012
3618174994516,7cyclictest3714163-21latency22:45:202
3618173994539,3cyclictest0-21swapper/123:30:271
361817499448,10cyclictest0-21swapper/222:00:302
3618174994433,7cyclictest3784576-21idleruntime-cro00:40:012
361817499443,16cyclictest1001-21mta-sts-daemon22:30:292
361817499442,37cyclictest3723811-21ssh23:00:302
3618174994418,3cyclictest0-21swapper/200:00:192
3618174994417,4cyclictest0-21swapper/222:15:332
3618172994436,5cyclictest420-21avahi-daemon23:05:290
3618172994431,11cyclictest151ktimers/021:10:240
3618174994335,4cyclictest0-21swapper/222:10:262
3618174994321,4cyclictest3769145-21munin-plugin-st00:15:012
3618174994318,3cyclictest0-21swapper/222:55:022
361817399434,31cyclictest3654163-21diskmemload00:15:261
3618172994336,4cyclictest1000-21mta-sts-daemon21:00:270
361817499422,31cyclictest3689720-21ssh22:05:322
3618172994236,3cyclictest0-21swapper/023:10:200
3618172994235,4cyclictest3757975-21grep23:55:340
3618172994235,4cyclictest3670339-21aten_r2power_en21:35:170
3618172994211,25cyclictest3773456-21ssh00:20:400
3618172994211,25cyclictest3773456-21ssh00:20:400
361817499414,30cyclictest3661477-21ssh21:20:232
3618173994129,9cyclictest3763605-21fschecks_time00:05:241
3618172994133,6cyclictest3775777-21aten_r2power_po00:25:190
3618172994133,6cyclictest3775777-21aten_r2power_po00:25:190
361817299413,33cyclictest3695797-21ssh22:15:260
3618172994131,8cyclictest3639155-21sendmail20:20:000
3618172994131,8cyclictest3639155-21sendmail20:20:000
3618172994120,13cyclictest3667861-21ssh21:30:290
3618174994032,5cyclictest3781508-21systemd-run00:35:012
3618174994032,5cyclictest3637175-21proc_pri20:10:302
3618174994030,6cyclictest3728915-21latency_hist23:10:022
3618172994032,5cyclictest265-21systemd-journal00:15:010
361817499391,17cyclictest3702147-21ssh22:25:322
3618173993933,3cyclictest0-21swapper/123:10:361
3618173993933,3cyclictest0-21swapper/100:30:311
361817299393,28cyclictest1863115-21cups-browsed20:05:270
3618172993929,4cyclictest3710262-21cron22:40:010
3618172993925,11cyclictest0-21swapper/021:45:010
361817299392,29cyclictest3705195-21sshd22:30:320
3618174993830,5cyclictest3713370-21cron22:45:012
3618173993832,3cyclictest0-21swapper/123:25:281
3618173993831,4cyclictest3697890-21munin-plugin-st22:20:011
3618173993830,5cyclictest3660459-21ssh21:20:011
3618173993830,5cyclictest3624185-21systemd-run19:30:021
3618173993829,7cyclictest3720446-21missed_timers22:55:221
361817299387,7cyclictest171rcu_preempt21:15:280
3618172993830,5cyclictest3716470-21ssh22:50:010
361817299382,27cyclictest3739230-21rm23:25:270
3618172993818,11cyclictest151ktimers/020:45:240
3618173993731,3cyclictest3643639-21kworker/u8:1-xprtiod22:55:011
3618173993731,3cyclictest0-21swapper/122:00:011
3618173993730,3cyclictest0-21swapper/100:35:161
3618173993728,6cyclictest421-21dbus-daemon22:05:021
3618172993730,4cyclictest3735063-21sendmail23:20:010
3618172993730,4cyclictest3634737-21latency_hist20:05:020
3618172993729,6cyclictest421-21dbus-daemon20:00:010
361817499364,26cyclictest3754653-21ssh23:50:262
3618174993630,3cyclictest3643641-21kworker/u8:8-xprtiod22:00:012
3618173993631,2cyclictest0-21swapper/123:15:251
3618173993631,2cyclictest0-21swapper/121:40:011
3618173993628,5cyclictest3707243-21latency_hist22:35:021
3618173993627,6cyclictest1863115-21cups-browsed23:35:361
3618173993625,8cyclictest3702068-21grep22:25:291
361817299363,27cyclictest3680279-21ssh21:50:260
3618172993627,4cyclictest0-21swapper/022:40:310
3618174993530,2cyclictest0-21swapper/219:40:012
3618173993529,3cyclictest0-21swapper/123:00:281
3618173993527,5cyclictest3666821-21systemd-run21:30:011
3618173993527,5cyclictest3621165-21idleruntime-cro19:20:001
3618173993526,6cyclictest420-21avahi-daemon22:35:441
3618173993526,6cyclictest3690184-21grep22:05:401
3618172993529,4cyclictest3651183-21systemd-run21:00:010
3618172993528,4cyclictest3677239-21ssh21:45:290
3618172993527,5cyclictest421-21dbus-daemon19:20:010
3618172993526,6cyclictest3761273-21threads00:00:380
3618174993428,4cyclictest3618171-21cyclictest23:50:022
3618174993427,3cyclictest0-21swapper/221:15:312
3618174993424,6cyclictest1-21systemd21:45:012
3618173993429,2cyclictest0-21swapper/100:15:031
3618172993427,4cyclictest3738342-21latency_hist23:25:030
3618172993427,3cyclictest0-21swapper/022:05:350
3618172993425,7cyclictest3745164-21latency23:35:250
361817499336,20cyclictest3677202-21ssh21:45:282
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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