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2025-11-27 - 13:26

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.

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 Nov 27, 2025 00:39:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4003184995847,5cyclictest0-21swapper/221:44:212
4003184995847,5cyclictest0-21swapper/221:44:212
4003184995141,6cyclictest4039767-21/usr/sbin/munin21:14:122
4003184994823,22cyclictest4030695-21munin-plugin-st20:50:012
4003184994823,22cyclictest4030695-21munin-plugin-st20:50:012
4003184994818,27cyclictest4122321-21sh23:00:462
4003182994833,8cyclictest12450irq/32-eth021:34:130
4003182994833,8cyclictest12450irq/32-eth021:34:130
400318499469,18cyclictest4178507-21ssh00:14:162
400318499463,8cyclictest4036129-21ntpq21:09:152
4003184994616,27cyclictest4168653-21sh00:00:242
4003184994535,6cyclictest4098618-21kworker/u8:6-events_unbound22:59:142
4003184994534,7cyclictest4044537-21latency_hist21:20:022
4003184994523,19cyclictest0-21swapper/200:00:012
4003183994537,5cyclictest4172114-21ssh00:05:011
4003183994537,3cyclictest0-21swapper/121:59:121
4003183994535,6cyclictest4082123-21/usr/sbin/munin22:09:181
4003182994535,7cyclictest4049634-21sshd21:27:110
4003182994535,7cyclictest4049634-21sshd21:27:110
400318299452,35cyclictest2199103-21cups-browsed21:09:150
4003184994430,11cyclictest4152035-21mailstats23:39:212
4003184994425,14cyclictest0-21swapper/223:19:122
4003184994418,23cyclictest956-21mta-sts-daemon23:40:102
4003184994418,23cyclictest4113627-21timerwakeupswit22:49:272
4003184994416,25cyclictest4034491-21missed_timers21:04:142
4003183994436,5cyclictest4160498-21systemd-run23:50:011
4003183994435,6cyclictest4016677-21systemd-run19:55:011
4003183994435,6cyclictest4016677-21systemd-run19:55:011
4003182994435,7cyclictest4090884-21ssh22:20:010
4003182994431,7cyclictest4093789-21ssh22:24:150
400318499432,9cyclictest4185736-21ssh00:24:172
400318499432,9cyclictest4185736-21ssh00:24:172
4003184994323,17cyclictest0-21swapper/223:15:012
4003184994323,17cyclictest0-21swapper/223:15:012
4003183994336,4cyclictest4070339-21kernelversion21:54:091
4003183994336,4cyclictest4070339-21kernelversion21:54:091
4003183994335,5cyclictest4182985-21cron00:20:011
4003183994335,5cyclictest4182985-21cron00:20:011
4003182994338,3cyclictest0-21swapper/021:59:120
400318499422,18cyclictest4093753-21ssh22:24:142
400318499422,16cyclictest4101649-21diskmemload22:34:232
4003184994216,23cyclictest4005585-21ntp_kernel_pll_19:19:152
400318499421,15cyclictest4067075-21sensors21:49:262
400318499421,15cyclictest4067075-21sensors21:49:262
400318499421,14cyclictest4116917-21ssh22:54:152
4003182994225,12cyclictest151ktimers/020:59:130
400318499413,9cyclictest4147845-21ntpq23:34:132
400318499413,9cyclictest4147845-21ntpq23:34:132
400318499412,18cyclictest4097674-21ssh22:29:162
4003184994118,20cyclictest4008512-21needreboot19:29:112
400318499411,14cyclictest4070651-21ntpq21:54:162
400318499411,14cyclictest4070651-21ntpq21:54:162
400318499411,13cyclictest4055093-21ntpq21:34:122
400318499411,13cyclictest4055093-21ntpq21:34:122
4003183994134,3cyclictest0-21swapper/121:24:181
4003183994134,3cyclictest0-21swapper/121:24:181
4003183994133,5cyclictest1-21systemd19:15:011
4003183994123,3cyclictest171rcu_preempt21:49:181
4003183994123,3cyclictest171rcu_preempt21:49:181
4003182994134,4cyclictest4148938-21latency_hist23:35:020
4003182994134,4cyclictest4148938-21latency_hist23:35:020
4003182994132,7cyclictest266-21systemd-journal23:20:000
4003182994131,7cyclictest4121445-21vmstat22:59:280
4003182994128,11cyclictest421-21avahi-daemon00:24:070
4003182994128,11cyclictest421-21avahi-daemon00:24:070
400318499404,30cyclictest4078331-21ssh22:04:202
400318499402,18cyclictest956-21mta-sts-daemon23:54:182
4003184994017,2cyclictest0-21swapper/220:09:112
4003184994016,4cyclictest4017548-21ntp_kernel_pll_19:59:152
4003184994013,5cyclictest2194-21unixbench_multi00:39:302
4003184994013,5cyclictest2194-21unixbench_multi00:39:302
4003184994010,5cyclictest4036692-21diskmemload22:08:002
4003183994034,3cyclictest0-21swapper/100:00:031
4003183994033,3cyclictest0-21swapper/122:20:011
4003183994031,6cyclictest421-21avahi-daemon22:49:271
4003183994030,7cyclictest4027737-21latency_hist20:40:021
400318299405,26cyclictest4078426-21ssh22:04:230
4003182994029,7cyclictest422-21dbus-daemon21:44:090
4003182994029,7cyclictest422-21dbus-daemon21:44:090
4003182994022,4cyclictest0-21swapper/000:14:210
400318499392,16cyclictest4140115-21sh23:24:142
400318499392,16cyclictest4140115-21sh23:24:142
400318499391,9cyclictest4059043-21ssh21:39:142
400318499391,9cyclictest4059043-21ssh21:39:142
4003184993913,3cyclictest0-21swapper/220:20:012
400318499391,15cyclictest4144007-21ntpq23:29:172
400318499391,15cyclictest4144007-21ntpq23:29:172
400318499391,15cyclictest4105385-21rm22:39:202
4003184993911,5cyclictest4036692-21diskmemload21:23:122
4003184993911,5cyclictest4036692-21diskmemload21:23:122
4003184993911,5cyclictest2199103-21cups-browsed20:11:492
400318499391,13cyclictest4109043-21missed_timers22:44:102
400318499391,13cyclictest4074583-21ssh21:59:182
4003184993910,6cyclictest957-21mta-sts-daemon19:39:122
4003183993931,5cyclictest4059967-21ls21:40:001
4003183993931,5cyclictest4059967-21ls21:40:001
400318399391,27cyclictest4132387-21sh23:14:161
400318399391,27cyclictest4132387-21sh23:14:161
4003182993927,9cyclictest4192735-21timerwakeupswit00:34:270
4003182993927,9cyclictest4192735-21timerwakeupswit00:34:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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