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2026-09-02 - 20:51

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 Sep 02, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1700219107,1889sleep028919-21kworker/0:207:09:230
20704211968,1131sleep320711-21ntpq09:49:093
15664245756,383sleep315809-21latency_hist11:18:433
1374243068,306sleep31410-21ntpq12:14:063
2668623647,298sleep3367-21snmpd11:53:393
70762307138,23sleep30-21swapper/310:49:123
150012257139,25sleep30-21swapper/307:49:023
150012257139,25sleep30-21swapper/307:49:023
8356225216,217sleep18410-21cpuspeed07:28:581
18383225110,126sleep318532-21unixbench_singl11:24:163
2604122508,231sleep3367-21snmpd10:06:533
27184222584,67sleep30-21swapper/311:53:523
27086221650,24sleep30-21swapper/310:09:113
27086221650,24sleep30-21swapper/310:09:113
3584220628,39sleep33725-21unixbench_singl08:54:143
4783220213,174sleep34903-21timerwakeupswit12:24:113
13216219912,171sleep313298-21mailstats11:09:113
13216219912,171sleep313298-21mailstats11:09:113
31243218418,124sleep30-21swapper/310:24:013
29695218432,137sleep329775-21tune2fs10:19:013
4613218212,21sleep30-21swapper/308:59:033
4613218212,21sleep30-21swapper/308:59:033
20399217619,136sleep30-21swapper/308:04:163
19569217613,51sleep30-21swapper/311:29:053
12980216713,112sleep312985-21modprobe07:43:413
2289216215,131sleep22301-21ntp_states07:10:502
1100215933,27sleep00-21swapper/007:08:420
30115215610,134sleep230191-21systemctl10:19:122
339521557,13sleep30-21swapper/310:38:593
3229121529,108sleep332330-21grep12:09:063
2278821508,103sleep322822-21ps11:39:103
43121458,124sleep30-21swapper/310:29:023
1657821428,16sleep30-21swapper/307:54:033
242402141103,19sleep30-21swapper/311:44:033
21470214110,91sleep30-21swapper/308:09:093
2704321408,73sleep327135-21latency_hist08:28:433
2704321408,73sleep327135-21latency_hist08:28:433
1841321378,94sleep318451-21processes07:59:123
1564121369,93sleep30-21swapper/309:33:593
314521338,90sleep33153-21munin-run10:38:433
15331213328,48sleep315404-21date09:33:433
7948213210,58sleep30-21swapper/312:34:133
18697213212,29sleep018716-21cpu09:43:570
24188212932,55sleep30-21swapper/308:18:583
900621285,86sleep30-21swapper/310:54:533
1243721286,31sleep30-21swapper/309:23:493
1243721286,31sleep30-21swapper/309:23:493
10110212711,100sleep19629-21apt-get07:33:501
6257212596,16sleep30-21swapper/312:29:123
28622212510,78sleep328768-21latency_hist08:33:433
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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