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2025-11-20 - 08:19

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 Nov 20, 2025 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9311265325,609sleep39335-21df00:29:033
17296241923,370sleep017255-21latency_hist21:28:480
9349232646,268sleep29428-21fschecks_time00:29:072
24806232332,279sleep224842-21cat20:09:102
3612230412,209sleep23720-21sort20:44:202
7803230090,190sleep27896-21fschecks_time00:24:102
1555229632,247sleep21578-21fschecks_count00:04:072
250022276134,110sleep225046-21awk21:53:462
6853227113,243sleep06896-21unin-run22:38:470
9013224920,216sleep39022-21unin-run00:28:473
1799224566,87sleep21808-21sshd22:19:192
2472922420,7sleep00-21swapper/023:34:070
2472922420,7sleep00-21swapper/023:34:070
2040722357,213sleep220467-21latency_hist21:38:482
14090222631,152sleep214215-21timerwakeupswit22:59:172
20975222530,178sleep221101-21latency_hist23:23:482
29496221614,187sleep229544-21latency20:24:132
13694220824,166sleep212752-21/usr/sbin/munin21:15:052
13694220824,166sleep212752-21/usr/sbin/munin21:15:052
26199220212,176sleep126206-21sh20:14:101
2064421888,51sleep220707-21cpuspeed21:39:002
2635721839,162sleep226367-21awk23:39:192
7604217925,141sleep27642-21processes22:39:182
19632217414,143sleep219655-21latency_hist19:53:482
18065217313,141sleep018033-21latency_hist19:48:490
18065217313,141sleep018033-21latency_hist19:48:490
31272217218,55sleep20-21swapper/223:55:142
31272217218,55sleep20-21swapper/223:55:142
27711216989,24sleep20-21swapper/223:44:122
26734216519,54sleep226821-21sort20:14:232
13027216498,17sleep20-21swapper/222:57:192
10157216313,87sleep20-21swapper/221:04:392
9997216113,49sleep00-21swapper/022:48:490
615215788,23sleep2632-21modprobe22:18:462
15064215717,114sleep20-21swapper/223:04:052
15064215717,114sleep20-21swapper/223:04:052
2169221567,56sleep20-21swapper/219:59:092
28147215212,124sleep20-21swapper/220:19:162
5344215044,90sleep25449-21latency_hist22:33:482
6425214631,103sleep26484-21latency00:19:092
110621465,31sleep20-21swapper/200:02:492
15681214230,99sleep215684-21cron21:23:452
15681214230,99sleep215684-21cron21:23:452
161521418,55sleep21676-21cat20:39:072
3086121397,119sleep127165-1kworker/1:2H23:54:371
3086121397,119sleep127165-1kworker/1:2H23:54:371
6195213415,41sleep20-21swapper/222:34:212
1178821347,113sleep211925-21sed21:09:202
1178821347,113sleep211925-21sed21:09:202
5791213120,99sleep20-21swapper/220:53:322
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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