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2025-11-16 - 06:27

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 Sun Nov 16, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26282198816,1954sleep012260-21kworker/u8:121:24:120
825627639,721sleep18292-21ntpq19:59:271
2392026977,673sleep26018-21kworker/u8:020:49:222
26697267810,653sleep126736-21ntpq19:14:301
11058250315,472sleep211067-21/usr/sbin/munin20:09:212
11058250315,472sleep211067-21/usr/sbin/munin20:09:212
3285247213,443sleep33291-21diskstats19:44:233
14392236715,311sleep114455-21latency20:19:251
5461235679,265sleep15503-21cut23:14:301
12184233310,311sleep112245-21cat21:54:241
3169227516,238sleep23191-21latency_hist23:09:022
11692222329,123sleep111721-21cron21:54:001
10104222216,192sleep310109-21ntp_states23:29:303
10104222216,192sleep310109-21ntp_states23:29:303
10326222122,180sleep210340-21/usr/sbin/munin20:04:372
22759221716,126sleep122869-21timerandwakeup20:44:321
26914221618,172sleep10-21swapper/100:24:221
6329221014,123sleep15763-21/usr/sbin/munin21:34:341
29956221020,170sleep129398-21/usr/sbin/munin19:24:311
13654220921,170sleep013667-21fschecks_count21:59:200
23811220620,98sleep10-21swapper/100:14:211
12253220218,23sleep10-21swapper/120:14:001
12253220218,23sleep10-21swapper/120:14:001
30582219928,132sleep130159-21/usr/sbin/munin21:09:271
25889219890,91sleep10-21swapper/100:19:331
25889219890,91sleep10-21swapper/100:19:331
23954219712,103sleep10-21swapper/120:49:291
19679219610,88sleep119888-21apt-config22:19:031
19679219610,88sleep119888-21apt-config22:19:031
4693219335,106sleep10-21swapper/121:29:291
28576219121,99sleep10-21swapper/100:29:221
155862187101,72sleep115651-21awk22:04:291
3504218412,82sleep10-21swapper/123:09:211
640521838,39sleep10-21swapper/119:54:181
18638217189,16sleep10-21swapper/120:34:031
2055421688,13sleep10-21swapper/100:04:161
2055421688,13sleep10-21swapper/100:04:161
26429216232,79sleep10-21swapper/122:39:221
4830216053,23sleep10-21swapper/119:49:221
23247215163,18sleep10-21swapper/119:04:331
23247215163,18sleep10-21swapper/119:04:331
25634215041,86sleep10-21swapper/119:09:371
13859214939,27sleep10-21swapper/120:19:011
29183214713,118sleep129286-21latency_hist19:24:021
17653214317,96sleep00-21swapper/023:54:220
1235213848,63sleep10-21swapper/121:19:241
3888213410,66sleep14026-21grep19:44:371
18412213417,66sleep10-21swapper/123:54:591
7421213265,47sleep10-21swapper/121:39:221
21198213222,95sleep021246-21awk18:59:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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