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2025-11-19 - 07:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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.

Note that this system runs a non-RT kernel.
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 50 highest latencies:
System rackbslot7s.osadl.org (updated Wed Nov 19, 2025 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
287812369710,3641sleep319716-21kworker/3:121:51:113
315925799,551sleep021808-21kworker/0:023:54:230
4323245352,379sleep34362-21wc23:59:193
2334623770,11sleep00-21swapper/021:34:280
32226225786,102sleep332325-21timerandwakeup23:44:213
32226225786,102sleep332325-21timerandwakeup23:44:213
25200225414,223sleep225268-21ls19:59:142
25200225414,223sleep225268-21ls19:59:142
13221225412,227sleep013227-21ntpq22:45:230
20091224818,211sleep120123-21fschecks_count19:44:111
15114224399,74sleep30-21swapper/321:09:123
15114224399,74sleep30-21swapper/321:09:123
17869223849,101sleep317872-21cron21:18:493
17869223849,101sleep317872-21cron21:18:493
32022223177,97sleep332141-21timerandwakeup20:19:213
5284223066,19sleep30-21swapper/320:39:123
7655221919,175sleep37785-21unixbench_multi00:09:243
2866221129,168sleep32807-21latency_hist22:13:533
32712220114,171sleep132734-21latency_hist20:23:521
27406218425,81sleep3225-21systemd-journal21:48:253
18675217974,27sleep30-21swapper/323:03:513
29622217516,145sleep329790-21rm23:38:523
13338217536,71sleep30-21swapper/322:45:263
23490217317,78sleep30-21swapper/321:34:323
5414217010,75sleep30-21swapper/300:04:073
5414217010,75sleep30-21swapper/300:04:073
628521680,37sleep26289-21unixbench_singl00:04:262
628521680,37sleep26289-21unixbench_singl00:04:262
4946216616,125sleep30-21swapper/320:38:523
2512621649,142sleep325145-21apt-get23:24:023
22590215617,121sleep322593-21gpgv21:33:513
22590215617,121sleep322593-21gpgv21:33:513
25654214922,51sleep325805-21unixbench_singl19:59:233
25654214922,51sleep325805-21unixbench_singl19:59:233
23860214960,28sleep30-21swapper/323:19:133
19387214917,63sleep30-21swapper/323:04:283
22070214710,124sleep322122-21if_eth019:50:073
22070214710,124sleep322122-21if_eth019:50:073
12271214514,69sleep312370-21timerandwakeup00:24:223
16657214016,109sleep316675-21latency_hist19:33:513
21038213718,103sleep221115-21grep23:09:232
21038213718,103sleep221115-21grep23:09:232
1362521349,53sleep30-21swapper/300:29:193
28200213216,88sleep10-21swapper/120:09:181
12676213212,56sleep30-21swapper/319:19:183
8449213011,65sleep38448-21munin-run19:08:523
1942121307,74sleep319448-21munin-run21:23:503
1188212217,25sleep30-21swapper/323:49:223
1188212217,25sleep30-21swapper/323:49:223
20007211816,83sleep220074-21/usr/sbin/munin19:44:082
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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