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2026-03-19 - 15:40

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 Thu Mar 19, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
263572507415,5046sleep326339-21kworker/3:110:41:293
25696275822,719sleep225704-21/usr/sbin/munin12:23:012
6064252413,496sleep26136-21/usr/sbin/munin07:53:202
31238246667,385sleep131253-21apt-get07:32:521
2328023437,276sleep123316-21ntpq08:48:181
493723407,322sleep113441-21snmpd07:48:551
1584323200,96sleep123139-21cyclictest08:23:221
8374228311,257sleep28422-21unin-run08:02:532
8374228311,257sleep28422-21unin-run08:02:532
18201228189,173sleep118250-21latency11:58:131
26970225993,144sleep127012-21fschecks_count07:18:101
31582225093,53sleep10-21swapper/110:58:101
19572224114,207sleep019644-21fschecks_time12:03:090
2493422319,207sleep125065-21idleruntime07:12:571
16433223122,189sleep216440-21/usr/sbin/munin11:53:092
18230222837,162sleep118281-21cpuspeed08:33:081
24678220111,176sleep024775-21mailstats12:18:180
24678220111,176sleep024775-21mailstats12:18:180
2283621969,93sleep122935-21grep10:28:231
19581219614,128sleep119678-21timerandwakeup10:18:211
19581219614,128sleep119678-21timerandwakeup10:18:211
10924218014,95sleep110972-21latency_hist09:52:541
19995217719,57sleep10-21swapper/108:38:131
7622216931,66sleep17019-21/usr/sbin/munin11:23:211
7622216931,66sleep17019-21/usr/sbin/munin11:23:211
6802216021,35sleep16850-21latency_hist11:22:531
6802216021,35sleep16850-21latency_hist11:22:531
23783216083,62sleep123848-21ls10:33:111
14008215663,78sleep114011-21cron10:02:511
14008215663,78sleep114011-21cron10:02:511
31156215523,106sleep331171-21modprobe10:57:523
20838215414,72sleep120992-21latency_hist12:07:541
14333215330,95sleep00-21swapper/011:45:290
25991214921,109sleep10-21swapper/112:23:121
9933214438,82sleep10-21swapper/108:07:521
10600214441,86sleep110665-21processes11:33:181
10600214441,86sleep110665-21processes11:33:181
6604214213,110sleep1222-21systemd-journal07:55:291
21559214172,19sleep10-21swapper/108:43:131
483221395,12sleep00-21swapper/011:13:310
29089213717,78sleep129145-21systemd-run09:07:521
28817213717,14sleep10-21swapper/112:33:051
472213547,15sleep10-21swapper/109:18:141
22787213524,26sleep10-21swapper/112:13:111
22787213524,26sleep10-21swapper/112:13:111
6893212911,18sleep10-21swapper/109:38:161
1778821299,17sleep10-21swapper/110:13:171
1778821299,17sleep10-21swapper/110:13:171
15281212914,26sleep00-21swapper/011:48:190
30118212737,76sleep130204-21latency10:53:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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