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2026-01-09 - 14:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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.
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 rackfslot7s.osadl.org (updated Fri Jan 09, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9290652152104,28sleep30-21swapper/319:09:243
9288452142107,30sleep20-21swapper/219:06:342
9288172141110,26sleep10-21swapper/119:06:131
9289902140106,29sleep00-21swapper/019:08:240
92936399304,7cyclictest1000065-21smartctl22:45:191
929358993023,4cyclictest0-21swapper/019:20:010
929367992823,3cyclictest645-21dbus-daemon23:20:012
92936399289,5cyclictest1029016-21ntpq00:15:181
92936399284,5cyclictest968391-21perf-exec21:10:011
92936399271,8cyclictest977876-21awk21:40:011
92936399261,9cyclictest932781-21perf19:20:011
929358992621,3cyclictest681-21gdbus23:40:010
929358992618,6cyclictest1023167-21awk00:00:000
92936399258,7cyclictest1002327-21sshd22:54:521
929372992418,3cyclictest0-21swapper/319:20:003
92936399249,3cyclictest331ktimers/123:20:151
929372992320,2cyclictest656-21systemd-logind21:40:023
929367992311,7cyclictest0-21swapper/223:15:012
929372992218,3cyclictest661-21rs:main3
929372992213,6cyclictest1010523-21run-parts23:20:003
929372992211,7cyclictest941009-21basename19:45:003
92936399221,9cyclictest1013947-21apt-get23:30:121
929363992212,8cyclictest1004204-21awk23:00:001
92936399221,10cyclictest954631-21df_inode20:25:131
92936799213,10cyclictest43-21ksoftirqd/221:25:012
929363992110,2cyclictest759-21mta-sts-daemon21:50:181
92935899219,1cyclictest103-21hwrng21:06:540
929358992115,4cyclictest0-21swapper/021:40:000
929372992016,3cyclictest991458-21latency_hist22:20:013
92936799203,6cyclictest43-21ksoftirqd/222:59:592
92936799203,4cyclictest962062-21munin-run20:50:002
92936799201,5cyclictest43-21ksoftirqd/200:25:002
929367992013,2cyclictest191rcu_preempt21:25:172
929363992016,2cyclictest642-21cron00:35:001
929363992010,4cyclictest794-21snmpd20:54:151
929358992017,2cyclictest1030631-21ntp_kernel_pll_00:20:150
929358992012,7cyclictest355-21systemd-journal19:45:000
929358992011,6cyclictest1013689-21/usr/sbin/munin23:30:010
92935899201,10cyclictest221rcuc/023:20:160
92937299199,6cyclictest681-21gdbus20:40:003
92937299191,12cyclictest1011389-21grep23:20:153
92936799199,4cyclictest43-21ksoftirqd/223:40:012
92936799197,1cyclictest191rcu_preempt00:35:192
929367991916,2cyclictest645-21dbus-daemon22:14:592
929367991912,5cyclictest990005-21irqstats22:15:152
929367991912,5cyclictest795-21runrttasks00:28:512
929367991912,5cyclictest1-21systemd19:55:002
929367991912,5cyclictest1000613-21runrttasks22:48:042
929367991912,2cyclictest191rcu_preempt23:45:112
92936799191,10cyclictest1023158-21munin-run00:00:012
929367991910,6cyclictest191rcu_preempt23:25:182
929367991910,6cyclictest1021566-21cron23:55:012
929363991915,3cyclictest945901-21apt-key20:00:011
92936399191,16cyclictest946270-21apt-get20:00:101
929358991915,1cyclictest0-21swapper/022:40:130
92935899191,11cyclictest1010524-21systemctl23:20:010
92937299189,7cyclictest0-21swapper/322:39:593
92937299189,4cyclictest1002463-10gpg-connect-age22:55:013
929372991812,6cyclictest0-21swapper/322:05:163
929372991811,5cyclictest991766-21df22:20:133
92937299180,5cyclictest977787-21seq21:39:143
92936799187,4cyclictest43-21ksoftirqd/220:19:592
929367991814,2cyclictest977873-21sendmail21:40:012
929367991813,1cyclictest191rcu_preempt20:42:522
929367991812,2cyclictest191rcu_preempt20:05:142
929367991810,7cyclictest967594-21ntpq21:05:172
92936799180,7cyclictest945770-21true19:59:592
92936799180,5cyclictest43-21ksoftirqd/220:15:002
92936799180,16cyclictest985192-21/usr/sbin/munin22:00:132
92936799180,16cyclictest938020-21/usr/sbin/munin19:35:162
92936799180,16cyclictest794-21snmpd21:11:102
92936799180,10cyclictest984451-21apt-get22:00:002
92936399188,4cyclictest992551-21seq22:20:561
929363991814,2cyclictest659-21in:imuxsock21:30:001
929363991811,1cyclictest0-21swapper/123:05:171
92936399180,16cyclictest958743-21sendmail-mta20:38:171
929358991812,5cyclictest0-21swapper/019:55:150
929358991812,4cyclictest1015155-21sshd23:33:510
929358991811,5cyclictest984457-21systemctl22:00:000
929358991810,6cyclictest1006536-21ntpq23:05:170
92935899180,16cyclictest990931-21taskset22:18:580
92937299177,6cyclictest962074-21basename20:49:593
929372991713,2cyclictest945744-21perf-exec19:59:593
929372991711,5cyclictest975695-21/usr/sbin/munin21:30:193
929372991711,4cyclictest965062-21taskset20:58:193
929372991711,4cyclictest1026361-21taskset00:06:103
929372991711,4cyclictest1004572-21cstates23:00:113
929372991710,5cyclictest1-21systemd22:35:013
929372991710,5cyclictest1004200-21apt23:00:003
929372991710,4cyclictest952627-21dpkg20:20:003
92937299170,15cyclictest955640-21taskset20:28:543
92937299170,15cyclictest953141-21/usr/sbin/munin20:20:133
92936799172,5cyclictest43-21ksoftirqd/200:05:002
929367991711,4cyclictest932470-21chrt19:16:222
929367991711,4cyclictest1018073-21taskset23:40:372
929367991710,2cyclictest191rcu_preempt00:10:162
92936799170,4cyclictest935943-21sshd19:26:522
92936799170,3cyclictest992890-21perf22:25:002
92936799170,15cyclictest971192-21runrttasks21:15:552
92936799170,15cyclictest966480-21taskset21:01:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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