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2026-07-23 - 20:30

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 Thu Jul 23, 2026 12:43:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
671268995534,14cyclictest759798-21sshd10:35:481
671268995042,5cyclictest806416-21ssh11:55:011
671267995034,13cyclictest761585-21ssh10:40:000
671267994841,5cyclictest824343-21munin-plugin-st12:25:000
671268994537,5cyclictest1002-21mta-sts-daemon12:20:521
671268994536,6cyclictest4066570-21cups-browsed09:55:521
671268994533,4cyclictest1000-21mta-sts-daemon11:36:451
671267994527,14cyclictest695238-40mandb08:28:460
671267994523,12cyclictest151ktimers/007:30:460
671269994436,5cyclictest769070-21threads10:50:562
671268994438,3cyclictest0-21swapper/109:45:531
671268994438,3cyclictest0-21swapper/109:45:531
671268994436,5cyclictest0-21swapper/112:05:471
671268994337,3cyclictest0-21swapper/110:20:431
671268994335,5cyclictest803433-21systemd-run11:50:011
671268994335,5cyclictest768438-21kernelversion10:50:411
671268994333,7cyclictest421-21dbus-daemon09:20:011
671269994232,7cyclictest420-21avahi-daemon12:33:322
671268994235,4cyclictest691262-21fschecks_count08:15:381
671268994235,4cyclictest1001-21mta-sts-daemon10:06:181
671268994234,5cyclictest784252-21sed11:16:051
671268994232,6cyclictest420-21avahi-daemon12:16:171
671268994232,6cyclictest420-21avahi-daemon12:16:171
671268994230,9cyclictest420-21avahi-daemon12:35:441
671267994224,15cyclictest692245-21munin-run08:20:010
671269994137,2cyclictest0-21swapper/208:28:492
671269994131,4cyclictest0-21swapper/211:30:522
671269994130,8cyclictest785513-21sh11:20:012
671268994132,6cyclictest4066567-21cupsd09:29:461
671268994132,5cyclictest734655-21cron09:55:001
671267994133,5cyclictest713338-21ssh09:20:010
671269994032,5cyclictest725543-21munin-run09:40:012
671269994030,5cyclictest0-21swapper/209:45:462
671269994030,5cyclictest0-21swapper/209:45:462
671268994033,4cyclictest755845-21latency_hist10:30:021
671268994033,4cyclictest755845-21latency_hist10:30:021
671268994031,6cyclictest1-21systemd12:00:531
671268994031,5cyclictest1001-21mta-sts-daemon07:40:491
671268994031,5cyclictest1001-21mta-sts-daemon07:40:491
671267994032,5cyclictest737692-21sendmail10:00:010
671269993933,3cyclictest0-21swapper/210:15:012
671269993932,3cyclictest0-21swapper/210:40:012
671268993933,3cyclictest0-21swapper/109:40:011
671268993931,5cyclictest715082-21grep09:20:571
671268993931,5cyclictest704241-21munin-plugin-st09:00:001
671268993931,4cyclictest0-21swapper/109:00:481
671268993931,4cyclictest0-21swapper/109:00:481
671268993929,7cyclictest265-21systemd-journal09:31:481
671268993923,12cyclictest4066570-21cups-browsed10:12:571
671267993931,5cyclictest773600-21systemd-run11:00:010
671269993830,5cyclictest727216-21unixbench_multi09:40:562
671269993827,6cyclictest0-21swapper/209:25:482
671268993831,3cyclictest0-21swapper/112:10:471
671268993829,7cyclictest675766-21/usr/sbin/munin07:25:021
67126899382,33cyclictest798640-21ssh11:40:511
671267993831,4cyclictest828789-21threads12:30:540
671267993814,15cyclictest151ktimers/011:30:450
671269993731,3cyclictest701267-21kworker/u8:7-xprtiod09:35:012
671269993716,10cyclictest0-21swapper/209:20:482
67126899374,28cyclictest738955-21ssh10:00:571
671268993730,4cyclictest0-21swapper/110:31:281
671268993730,4cyclictest0-21swapper/110:31:281
671268993727,5cyclictest0-21swapper/112:30:471
671267993731,4cyclictest421-21dbus-daemon08:50:010
671267993723,10cyclictest151ktimers/010:20:490
67126799372,29cyclictest151ktimers/010:45:460
671267993718,12cyclictest151ktimers/012:05:520
671269993628,4cyclictest0-21swapper/212:16:032
671269993628,4cyclictest0-21swapper/212:16:032
671269993626,7cyclictest4066570-21cups-browsed12:10:022
671269993626,6cyclictest674292-21systemd-run07:20:022
671268993628,5cyclictest792742-21proc_pri11:30:521
671268993627,6cyclictest265-21systemd-journal10:41:181
671268993627,4cyclictest0-21swapper/109:40:451
671268993626,7cyclictest776584-21systemd11:05:021
671268993612,19cyclictest765766-21sshd10:45:481
671267993629,5cyclictest4066570-21cups-browsed11:17:020
671267993629,5cyclictest1000-21mta-sts-daemon11:05:520
671267993628,6cyclictest671266-21cyclictest12:05:020
671267993627,6cyclictest4066570-21cups-browsed11:36:290
671269993529,3cyclictest0-21swapper/209:15:492
671269993528,4cyclictest776546-21cron11:05:012
671269993527,5cyclictest265-21systemd-journal07:45:012
671269993527,5cyclictest265-21systemd-journal07:45:012
671269993524,8cyclictest735639-21missed_timers09:55:392
671268993526,4cyclictest0-21swapper/111:25:471
671268993525,7cyclictest683517-21aten_r2power_cu07:50:341
671267993529,4cyclictest740736-21systemd-run10:05:010
671267993528,4cyclictest749752-21latency_hist10:20:010
671269993428,3cyclictest0-21swapper/211:00:012
671269993427,4cyclictest809379-21cron12:00:012
67126999342,25cyclictest601-21gmain11:05:462
67126899343,16cyclictest786753-21ssh11:20:531
671268993426,5cyclictest780683-21ssh11:10:471
671268993425,6cyclictest4066570-21cups-browsed10:59:341
671268993424,6cyclictest421-21dbus-daemon07:20:021
671268993422,7cyclictest779639-21latency_hist11:10:031
671268993421,10cyclictest421-21dbus-daemon10:19:591
671267993427,4cyclictest799056-21timerwakeupswit11:41:000
671267993427,4cyclictest742152-21switchtime10:05:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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