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2026-05-21 - 06:02

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 May 21, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11312727118,7241sleep312811-21kworker/3:223:59:113
17274295419,918sleep117284-21/usr/sbin/munin21:24:121
31080266213,632sleep231169-21/usr/sbin/munin20:24:252
26568244924,405sleep326588-21cron21:54:023
26568244924,405sleep326588-21cron21:54:023
1830724426,401sleep0363-21snmpd21:25:450
23491243019,393sleep123259-21latency_hist21:44:071
259224008,380sleep02617-21awk22:19:270
18103239551,25sleep00-21swapper/019:44:050
7674235119,68sleep00-21swapper/000:19:230
12112233511,218sleep012178-21switchtime22:49:310
12112233511,218sleep012178-21switchtime22:49:310
7394233215,277sleep07432-21http20:54:030
27120231832,270sleep027138-21kernelversion21:54:240
20155230848,77sleep00-21swapper/021:34:040
1203722667,219sleep00-21swapper/000:34:130
5532224126,151sleep05563-21idleruntime-cro00:14:020
27315223444,169sleep00-21swapper/020:13:120
20267223123,153sleep020314-21ntpq19:49:260
555422218,202sleep04227-1kworker/0:0H20:45:230
29955220940,110sleep01-21systemd23:49:030
29955220940,110sleep01-21systemd23:49:030
10600220816,135sleep010638-21fschecks_count00:29:210
1238322079,161sleep012442-21latency_hist21:09:050
23023220535,132sleep023066-21grep19:59:190
10134220127,51sleep00-21swapper/022:44:230
10134220127,51sleep00-21swapper/022:44:230
32252219510,133sleep032393-21unixbench_singl22:09:340
32252219510,133sleep032393-21unixbench_singl22:09:340
926221859,108sleep00-21swapper/019:14:250
7155217355,73sleep00-21swapper/022:34:250
10274216644,63sleep00-21swapper/000:29:040
8465216552,75sleep00-21swapper/022:39:180
8222216391,53sleep00-21swapper/020:55:280
22550215210,83sleep022642-21switchtime21:39:340
7234214615,110sleep00-21swapper/019:09:200
19167214438,38sleep00-21swapper/023:14:060
166021429,18sleep00-21swapper/020:34:240
6862214118,99sleep27005-21unixbench_singl20:49:322
3875213844,77sleep03981-21fschecks_time22:24:240
2465621386,12sleep30-21swapper/320:04:233
3488213631,68sleep00-21swapper/020:39:330
30264213531,66sleep00-21swapper/022:04:250
24053213517,95sleep224089-21latency21:44:402
24053213517,95sleep224089-21latency21:44:402
13949213410,108sleep014098-21grep21:14:060
5791213319,94sleep20-21swapper/222:29:302
2144421329,79sleep00-21swapper/019:54:180
15844213243,76sleep015892-21fschecks_count21:19:230
27149213055,52sleep00-21swapper/023:39:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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