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2026-08-18 - 17:17

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 Tue Aug 18, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
214232730717,7277sleep220459-21kworker/2:207:45:152
3372478021,4746sleep129351-21kworker/1:011:49:131
32082230929,3069sleep032083-21ntp_states11:45:410
141702214611,2117sleep14322-21kworker/u8:010:49:471
15872238514,178sleep016024-21latency_hist07:29:380
1978235383,256sleep02042-21find10:10:050
18250235138,164sleep00-21swapper/009:19:550
773023327,313sleep07776-21grep10:29:510
22322231136,194sleep022369-21latency_hist07:49:370
1940422866,39sleep00-21swapper/007:39:560
1940422866,39sleep00-21swapper/007:39:560
11724224414,110sleep011806-21fschecks_time12:24:570
14657223760,109sleep014454-21apt-get12:34:380
29353223117,117sleep029441-21fschecks_time09:54:550
14081223114,202sleep114206-21cat09:05:071
14081223114,202sleep114206-21cat09:05:071
1460422308,24sleep00-21swapper/010:50:260
2153422190,17sleep00-21swapper/009:29:510
19797220913,181sleep219894-21cat07:40:062
19797220913,181sleep219894-21cat07:40:062
7491219323,138sleep20-21swapper/210:29:372
6943218417,89sleep06961-21modprobe08:44:350
4900217464,95sleep00-21swapper/012:02:160
25198216819,100sleep00-21swapper/009:40:050
25198216819,100sleep00-21swapper/009:40:050
16314216519,127sleep216258-21latency_hist12:39:372
16314216519,127sleep216258-21latency_hist12:39:372
27323216451,92sleep00-21swapper/008:04:550
1619721618,23sleep00-21swapper/010:55:030
30210216057,60sleep00-21swapper/011:40:000
26253215811,79sleep026262-21forks09:44:540
282621539,126sleep02846-21kernelversion08:29:570
16947215117,120sleep316977-21awk09:15:013
983721507,23sleep00-21swapper/012:19:360
8492214514,105sleep08519-21munin-plugin-st08:49:350
14915214348,72sleep315064-21unixbench_multi10:50:333
3008821426,11sleep10-21swapper/109:55:081
10698213810,59sleep010805-21timerandwakeup12:20:090
22967213356,62sleep00-21swapper/007:50:010
1253721296,13sleep00-21swapper/007:17:430
2896221275,106sleep00-21swapper/008:09:550
13092212723,86sleep213223-21grep10:45:072
4102212615,12sleep00-21swapper/010:16:510
1665021269,102sleep00-21swapper/009:14:540
1971521257,16sleep00-21swapper/009:24:510
20192212212,88sleep120238-21cat11:09:371
14940212016,87sleep014959-21apt-get12:34:460
14940212016,87sleep014959-21apt-get12:34:460
5401211825,73sleep00-21swapper/012:04:510
30834211816,23sleep00-21swapper/008:15:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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