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2026-05-11 - 23:47

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 Mon May 11, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18570273416,698sleep018627-21/usr/sbin/munin08:54:570
19849241610,313sleep119988-21apt-key08:59:381
10159239872,142sleep110285-21latency_hist11:54:381
27551228761,133sleep127698-21unixbench_singl09:20:181
26733226484,107sleep126876-21unixbench_singl07:35:091
8192225963,181sleep17274-21/usr/sbin/munin11:45:091
8192225963,181sleep17274-21/usr/sbin/munin11:45:091
30462225671,120sleep130607-21latency_hist07:49:391
15055223612,210sleep015071-21awk12:09:470
21620223557,95sleep10-21swapper/109:04:391
17443223440,109sleep117585-21latency_hist10:34:381
23006222846,167sleep123020-21fschecks_count07:24:551
3208222279,196sleep132210-21timerwakeupswit09:35:081
29651222111,189sleep129765-21latency_hist09:29:391
1786222038,118sleep11-21systemd09:44:121
13619221711,135sleep1363-21snmpd12:04:561
13619221711,135sleep1363-21snmpd12:04:561
12452221615,187sleep012512-21sendmail_mailqu12:00:060
12452221615,187sleep012512-21sendmail_mailqu12:00:060
22824221531,170sleep122861-21idleruntime-cro12:34:361
10170221323,42sleep10-21swapper/110:10:001
10170221323,42sleep10-21swapper/110:10:001
9249220834,109sleep19357-21cut08:24:571
18046220817,178sleep218103-21awk07:09:582
14761220514,130sleep114800-21idleruntime10:24:571
23503220491,92sleep10-21swapper/109:09:561
22128219711,173sleep122197-21sort09:04:591
8110219514,107sleep18258-21latency_hist10:04:391
22684218892,52sleep122797-21latency_hist07:24:391
21332218613,83sleep10-21swapper/112:29:391
6484218188,72sleep16522-21processes08:15:031
1040217671,24sleep10-21swapper/107:59:361
10490217515,139sleep310634-21cat08:29:393
7284217325,127sleep27343-21sendmail-msp08:19:362
19033216030,86sleep119153-21latency_hist10:39:391
11657215014,121sleep211689-21idleruntime-cro11:59:352
16017214947,28sleep10-21swapper/108:45:081
30467214811,65sleep10-21swapper/111:14:561
23055214560,16sleep10-21swapper/110:50:091
8858214454,76sleep18874-21idleruntime-cro08:24:361
6016214027,94sleep16079-21latency11:40:001
6016214027,94sleep16079-21latency11:40:001
22841213911,115sleep222901-21processes10:50:062
2112321378,47sleep10-21swapper/110:45:001
2698213458,15sleep10-21swapper/111:29:541
2698213458,15sleep10-21swapper/111:29:541
26331213118,28sleep20-21swapper/209:19:382
26331213118,28sleep20-21swapper/209:19:382
19435212748,65sleep10-21swapper/107:14:411
13586212616,84sleep10-21swapper/108:39:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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