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2026-08-28 - 02:40

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 Fri Aug 28, 2026 00:42:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37900995850,5cyclictest187124-21latency_hist00:15:022
37899995346,4cyclictest0-21swapper/100:38:401
3789899512,23cyclictest75228-21ssh21:11:140
37899995039,5cyclictest0-21swapper/123:51:051
37900994840,5cyclictest72407-21systemd-run21:05:012
37899994843,2cyclictest0-21swapper/119:40:001
37899994843,2cyclictest0-21swapper/119:40:001
3789899474,31cyclictest154657-21ssh23:21:060
37898994732,12cyclictest125902-21idleruntime-cro22:35:010
37898994529,2cyclictest0-21swapper/021:31:040
37900994436,5cyclictest76918-21cron21:15:012
37899994436,5cyclictest180959-21systemd-run00:05:021
37900994334,6cyclictest116765-21systemd-run22:20:012
3789999432,36cyclictest111911-21ssh22:11:061
37898994337,4cyclictest46918-21systemd-run19:40:010
37898994337,4cyclictest46918-21systemd-run19:40:010
37898994328,11cyclictest40935-21latency_hist19:20:020
37900994234,5cyclictest694-21cron22:55:012
37900994132,6cyclictest2389223-21cups-browsed22:20:342
37899994135,3cyclictest0-21swapper/100:00:011
37899994133,5cyclictest52857-21cron20:00:011
37899994131,6cyclictest41091-21latency_hist19:20:021
37899994131,4cyclictest0-21swapper/123:11:011
37900994033,4cyclictest1002-21mta-sts-daemon22:07:572
37900994032,4cyclictest54407-21kworker/u8:8-xprtiod20:20:012
37900994030,7cyclictest60383-21cron20:25:012
37899994032,5cyclictest135052-21cron22:50:011
37898994034,4cyclictest59416-21fschecks_count20:20:560
37900993933,3cyclictest0-21swapper/219:36:032
37900993933,3cyclictest0-21swapper/219:36:032
37900993931,5cyclictest157239-21cut23:25:552
37898993928,8cyclictest127720-21head22:36:180
37900993831,4cyclictest150315-21ssh23:15:012
37900993831,2cyclictest0-21swapper/220:00:012
37900993830,6cyclictest151245-21if_wlan023:15:592
37900993830,4cyclictest0-21swapper/200:38:372
37900993829,6cyclictest123375-21/usr/sbin/munin22:30:522
37899993829,6cyclictest1-21systemd21:30:011
37899993829,5cyclictest485-21in:imuxsock21:05:011
37899993829,5cyclictest265-21systemd-journal00:25:571
3789899388,5cyclictest37897-21cyclictest21:21:040
37898993824,3cyclictest151ktimers/023:26:040
37900993730,4cyclictest113678-21grep22:15:002
37900993730,4cyclictest1002-21mta-sts-daemon21:46:042
37900993729,4cyclictest1001-21mta-sts-daemon23:51:082
37900993728,4cyclictest0-21swapper/223:31:022
3790099372,26cyclictest665-21snmpd21:26:032
37899993730,5cyclictest187038-21ssh00:15:021
37899993728,5cyclictest77732-21grep21:15:581
3789999370,29cyclictest75135-21ssh21:11:091
3789899373,29cyclictest151637-21sshd23:16:080
37898993730,5cyclictest177899-21cups-browsed00:21:180
37898993730,5cyclictest177899-21cups-browsed00:21:180
37898993730,4cyclictest56069-21latency_hist20:10:030
37898993730,4cyclictest101438-21ssh21:55:010
3790099364,25cyclictest99684-21ssh21:51:072
37900993628,5cyclictest102522-21grep21:55:592
37900993628,5cyclictest102522-21grep21:55:592
37900993627,4cyclictest0-21swapper/220:40:012
37899993628,4cyclictest0-21swapper/121:31:091
37899993626,7cyclictest1002-21mta-sts-daemon20:15:021
3789999362,27cyclictest169943-21ssh23:46:061
37898993629,4cyclictest151ktimers/019:41:040
37898993627,5cyclictest151ktimers/020:46:030
3789899361,30cyclictest114966-21ssh22:16:060
37900993529,3cyclictest0-21swapper/221:31:142
37900993528,5cyclictest37897-21cyclictest22:42:522
37900993528,3cyclictest0-21swapper/221:21:022
37900993527,5cyclictest168792-21latency_hist23:45:022
37900993527,3cyclictest0-21swapper/223:00:012
37900993527,3cyclictest0-21swapper/221:16:062
37900993526,6cyclictest420-21avahi-daemon00:01:132
3789999353,24cyclictest665-21snmpd21:46:081
37899993528,4cyclictest69382-21kworker/u8:3-xprtiod22:36:171
37899993528,3cyclictest0-21swapper/121:36:051
37899993527,5cyclictest60416-21systemd-run20:25:021
37899993527,5cyclictest2389223-21cups-browsed22:28:061
37899993525,7cyclictest188732-21grep00:16:141
37899993525,7cyclictest188732-21grep00:16:141
37899993525,6cyclictest1002-21mta-sts-daemon23:34:541
37898993528,4cyclictest193966-21fschecks_count00:25:590
37898993528,4cyclictest138087-21ssh22:55:010
37898993524,8cyclictest43208-21needreboot19:25:590
37900993428,2cyclictest0-21swapper/223:40:012
37900993427,5cyclictest0-21swapper/200:30:532
37900993427,4cyclictest0-21swapper/200:20:012
37900993427,4cyclictest0-21swapper/200:20:012
37900993427,3cyclictest0-21swapper/221:36:112
37900993427,3cyclictest0-21swapper/221:10:012
37900993427,3cyclictest0-21swapper/219:55:012
37900993426,5cyclictest193668-21gdbus00:25:542
3790099342,27cyclictest182220-21ssh00:06:062
37899993427,4cyclictest141250-21latency_hist23:00:021
37899993426,5cyclictest73909-21systemd21:10:021
37899993426,5cyclictest42403-21cut19:25:011
37899993426,5cyclictest265-21systemd-journal19:15:011
37899993423,8cyclictest0-21swapper/123:10:021
37899993411,19cyclictest98441-21kworker/u8:15+xprtiod22:41:021
37898993429,3cyclictest90236-21latency21:35:590
37898993428,4cyclictest53402-21fschecks_count20:00:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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