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2026-08-30 - 05:11

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 Sun Aug 30, 2026 00:42:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3956357995040,7cyclictest4017896-21needreboot21:51:010
3956358994941,5cyclictest3978877-21systemd-run20:25:011
395635899483,35cyclictest4060418-21ssh23:01:091
3956358994739,4cyclictest0-21swapper/119:36:021
3956359994639,4cyclictest4095331-21munin-run00:00:012
3956359994639,4cyclictest4095331-21munin-run00:00:012
3956357994641,3cyclictest12750irq/33-eth022:09:550
3956357994629,14cyclictest4047609-21sh22:40:550
3956359994537,5cyclictest421-21dbus-daemon22:05:012
3956359994537,5cyclictest3986355-21systemd-run20:50:012
3956359994537,5cyclictest3986355-21systemd-run20:50:012
3956358994437,4cyclictest4028906-21ssh22:10:011
3956358994334,5cyclictest3971342-21idleruntime-cro20:00:011
3956357994230,10cyclictest265-21systemd-journal00:00:530
3956359994129,8cyclictest4057658-21switchtime22:56:182
3956357994134,4cyclictest4095331-21munin-run00:00:010
3956357994134,4cyclictest4095331-21munin-run00:00:010
395635799413,29cyclictest4045222-21ssh22:36:040
3956358994031,5cyclictest4047862-21sort22:40:581
3956358994029,8cyclictest4018245-21mailstats21:51:141
395635799403,32cyclictest4084546-21ssh23:41:060
3956357994030,7cyclictest421-21dbus-daemon21:30:010
3956357994030,4cyclictest0-21swapper/022:15:010
395635799402,31cyclictest665-21snmpd22:46:060
395635799402,31cyclictest665-21snmpd22:46:060
395635799401,32cyclictest4105740-21ssh00:16:090
3956358993933,3cyclictest0-21swapper/122:20:011
395635899393,28cyclictest4090579-21ssh23:51:061
3956358993932,3cyclictest0-21swapper/100:00:011
3956358993932,3cyclictest0-21swapper/100:00:011
3956358993931,5cyclictest4081031-21fschecks_count23:35:571
3956358993930,6cyclictest3956356-21cyclictest20:36:051
395635799395,28cyclictest4075393-21sh23:26:040
395635799394,31cyclictest4102629-21ssh00:11:040
3956357993831,4cyclictest4108198-21cpuspeed00:20:540
3956359993728,6cyclictest4084739-21mailstats23:41:122
395635899373,24cyclictest4063296-21ssh23:06:021
3956357993729,5cyclictest4113609-21latency_hist00:30:020
3956357993729,5cyclictest4113609-21latency_hist00:30:020
3956357993729,4cyclictest12650irq/32-eth022:21:050
3956357993728,6cyclictest4041507-21/usr/sbin/munin22:30:530
3956357993727,4cyclictest0-21swapper/023:24:280
3956357993722,10cyclictest12650irq/32-eth022:01:050
3956359993627,5cyclictest3980417-21latency_hist20:30:022
3956359993627,5cyclictest3960889-21wc19:25:012
3956359993626,6cyclictest4036721-21grep22:21:152
3956359993625,8cyclictest694-21cron20:55:002
3956359993625,8cyclictest694-21cron20:55:002
395635999361,29cyclictest4060403-21ssh23:01:092
395635899363,25cyclictest3999760-21ssh21:21:061
3956358993629,4cyclictest3966369-21proc_pri19:41:091
3956358993628,5cyclictest4118309-21unixbench_singl00:36:171
3956358993628,5cyclictest4072918-21unixbench-2d23:21:181
3956358993627,6cyclictest420-21avahi-daemon21:46:121
3956357993626,7cyclictest3966864-21sh19:45:010
3956357993619,14cyclictest4007688-21cron21:35:010
3956359993527,5cyclictest4095404-21cups-browsed00:26:162
3956359993527,5cyclictest4095404-21cups-browsed00:26:162
3956359993527,5cyclictest3959332-21cron19:20:012
3956359993522,10cyclictest4032949-21latency22:16:002
3956359993521,9cyclictest1003-21mta-sts-daemon20:36:052
3956358993528,4cyclictest4037987-21grep22:25:011
3956358993526,6cyclictest4050682-21head22:45:561
3956358993526,6cyclictest4050682-21head22:45:561
3956358993526,6cyclictest2164266-21cups-browsed21:11:061
3956358993526,6cyclictest2164266-21cups-browsed21:11:061
3956357993530,3cyclictest3956356-21cyclictest20:26:020
3956357993528,4cyclictest12650irq/32-eth023:46:040
3956357993527,3cyclictest0-21swapper/000:40:000
3956359993428,3cyclictest0-21swapper/223:35:012
3956359993427,4cyclictest3977361-21sendmail20:20:012
3956359993426,5cyclictest4115255-21grep00:31:162
3956359993426,5cyclictest4044941-21kernelversion22:35:582
3956359993426,5cyclictest3984762-21sed20:41:132
3956359993426,5cyclictest0-21swapper/220:00:012
3956358993427,4cyclictest4047022-21cron22:40:011
3956358993427,4cyclictest0-21swapper/120:20:011
3956358993427,3cyclictest0-21swapper/121:06:081
3956358993427,3cyclictest0-21swapper/121:06:081
3956358993426,5cyclictest3998468-21cron21:20:001
3956358993426,4cyclictest4012537-21unixbench_multi21:41:231
3956358993424,7cyclictest4103164-21unixbench_multi00:11:141
395635899342,24cyclictest4105755-21ssh00:16:101
3956357993427,4cyclictest4071197-21awk23:20:010
3956357993427,4cyclictest3988060-21kworker/u8:15+xprtiod21:20:010
3956357993427,3cyclictest0-21swapper/022:27:330
3956357993426,5cyclictest3974358-21systemd-run20:10:010
3956357993426,3cyclictest0-21swapper/023:30:590
3956357993424,7cyclictest420-21avahi-daemon23:36:110
3956357993421,10cyclictest265-21systemd-journal21:35:520
3956357993416,5cyclictest171rcu_preempt20:21:040
3956357993413,16cyclictest4099623-21ssh00:06:050
3956359993326,4cyclictest1003-21mta-sts-daemon00:37:332
3956359993325,5cyclictest3961389-21fschecks_time19:25:562
3956359993324,6cyclictest3975785-21unixbench_singl20:11:142
3956358993326,4cyclictest4059118-21idleruntime-cro23:00:001
3956358993325,5cyclictest1-21systemd22:55:011
3956358993325,5cyclictest1-21systemd22:55:011
3956358993324,7cyclictest3984852-21/usr/sbin/munin20:45:011
395635899331,22cyclictest4087561-21ssh23:46:081
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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