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2026-08-29 - 03:02

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 Sat Aug 29, 2026 00:42:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
202423799153147,4cyclictest351ktimers/200:05:172
202423699118110,3cyclictest2142791-21kworker/u8:4-rpciod00:05:171
2024235999992,5cyclictest2161165-21kworker/u8:12-rpciod00:05:170
2024236996248,9cyclictest177899-21cups-browsed21:51:081
2024236996248,9cyclictest177899-21cups-browsed21:51:081
2024235995432,15cyclictest151ktimers/020:06:020
202423799452,33cyclictest2128709-21ssh23:01:052
202423799451,40cyclictest2141029-21ssh23:21:082
2024237994436,4cyclictest0-21swapper/200:00:012
2024237994436,4cyclictest0-21swapper/200:00:012
2024237994434,6cyclictest439-21systemd-logind20:25:012
2024237994434,6cyclictest439-21systemd-logind20:25:012
2024237994434,6cyclictest2164266-21cups-browsed00:12:492
202423799443,32cyclictest665-21snmpd22:26:052
2024236994336,4cyclictest0-21swapper/100:11:021
2024236994335,5cyclictest2154998-21systemd23:45:021
202423599435,35cyclictest2159335-21ssh23:51:080
2024235994333,6cyclictest2085286-21/usr/sbin/munin21:50:550
2024235994333,6cyclictest2085286-21/usr/sbin/munin21:50:550
2024237994233,3cyclictest0-21swapper/222:11:082
2024237994226,10cyclictest0-21swapper/219:41:012
2024235994226,12cyclictest12650irq/32-eth023:01:060
2024237994133,5cyclictest2071013-21switchtime21:26:152
2024237994131,5cyclictest2064780-21kworker/u8:4-rpciod21:16:122
2024237994131,5cyclictest0-21swapper/223:00:012
2024237994131,5cyclictest0-21swapper/223:00:012
2024237994030,7cyclictest2119424-21missed_timers22:46:012
202423799402,35cyclictest2137856-21ssh23:16:042
202423699403,33cyclictest2095240-21ssh22:06:081
202423699402,28cyclictest2064540-21ssh21:16:041
2024235994033,4cyclictest2115384-21latency_hist22:40:020
202423599403,32cyclictest2119597-21sh22:46:060
2024235994032,6cyclictest2024256-21latency_hist19:10:010
202423599400,36cyclictest2079907-21ssh21:41:030
202423799393,27cyclictest2186943-21ssh00:36:092
2024237993931,4cyclictest2059240-21fschecks_count21:05:552
202423799391,10cyclictest2080021-21ssh21:41:092
202423799383,25cyclictest2067626-21ssh21:21:062
2024237993830,5cyclictest2124452-21sh22:55:012
2024237993830,5cyclictest2049736-21systemd-run20:35:022
2024237993830,5cyclictest1001-21mta-sts-daemon19:51:082
2024237993813,6cyclictest0-21swapper/219:31:032
2024236993831,4cyclictest1001-21mta-sts-daemon21:46:041
2024236993831,4cyclictest1001-21mta-sts-daemon21:46:041
2024236993830,5cyclictest2033210-21sh19:40:011
2024236993829,6cyclictest177899-21cups-browsed20:45:011
202423599384,5cyclictest171rcu_preempt00:11:120
2024235993831,4cyclictest2180543-21missed_timers00:26:010
2024235993822,11cyclictest2147096-21rm23:31:050
2024237993731,3cyclictest0-21swapper/222:41:032
2024237993731,3cyclictest0-21swapper/220:26:122
2024237993729,5cyclictest2106141-21systemd-run22:25:012
2024237993728,6cyclictest2024755-21fschecks_time19:10:552
2024237993728,6cyclictest2024755-21fschecks_time19:10:552
2024237993728,5cyclictest2042226-21cut20:10:012
2024237993728,5cyclictest2033255-21systemd-run19:40:022
2024236993729,5cyclictest2103874-21fschecks_count22:20:561
2024236993729,5cyclictest2057155-21unixbench_singl20:56:171
2024236993727,7cyclictest2148853-21ssh23:35:011
2024236993726,8cyclictest177899-21cups-browsed22:15:551
2024235993729,3cyclictest2164120-21munin-run00:00:010
2024235993729,3cyclictest2164120-21munin-run00:00:010
2024235993724,6cyclictest151ktimers/022:31:030
2024235993718,15cyclictest750-21ntpd21:01:040
2024237993630,3cyclictest0-21swapper/219:10:012
2024237993628,5cyclictest2082711-21latency21:45:582
2024237993628,5cyclictest2082711-21latency21:45:582
2024237993628,4cyclictest1001-21mta-sts-daemon00:31:532
2024236993630,3cyclictest2124990-21aten2.4-expect22:55:531
2024236993630,3cyclictest2124990-21aten2.4-expect22:55:531
2024236993628,5cyclictest421-21dbus-daemon21:45:011
2024236993628,5cyclictest2118362-21munin-plugin-st22:45:011
2024236993628,5cyclictest1000-21mta-sts-daemon21:28:281
2024235993618,3cyclictest171rcu_preempt23:36:090
2024235993614,14cyclictest151ktimers/021:31:030
202423799353,26cyclictest2156285-21ssh23:46:082
202423799353,26cyclictest2089129-21ssh21:56:062
202423799353,25cyclictest2113639-21ssh22:36:102
2024237993528,3cyclictest0-21swapper/221:00:012
2024237993526,5cyclictest2154959-21cron23:45:012
202423799352,20cyclictest177899-21cups-browsed21:51:082
202423799352,20cyclictest177899-21cups-browsed21:51:082
2024236993528,4cyclictest2124441-21ssh22:55:011
2024236993527,5cyclictest2156384-21wc23:46:101
2024236993527,5cyclictest2142767-21cron23:25:011
2024236993527,5cyclictest2039206-21munin-plugin-st20:00:011
2024236993526,4cyclictest0-21swapper/122:46:161
2024235993527,4cyclictest0-21swapper/023:16:030
2024235993523,6cyclictest2125262-21fschecks_count22:56:010
2024235993523,6cyclictest2125262-21fschecks_count22:56:010
2024237993426,5cyclictest2100654-21ssh22:15:552
2024237993426,4cyclictest0-21swapper/223:15:002
2024237993425,6cyclictest421-21dbus-daemon23:30:012
2024237993424,6cyclictest2112219-21cron22:35:012
2024237993420,11cyclictest351ktimers/200:21:022
202423799341,30cyclictest2076883-21ssh21:36:062
202423799341,22cyclictest2165547-21sh00:01:102
202423699343,22cyclictest177899-21cups-browsed23:01:041
2024236993430,2cyclictest0-21swapper/100:40:011
2024236993428,3cyclictest0-21swapper/100:00:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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