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2025-12-22 - 16:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #3

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.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 100 highest latencies:
System rack5slot3s.osadl.org (updated Mon Dec 22, 2025 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121792233159,24sleep10-21swapper/107:06:291
123372224194,20sleep20-21swapper/207:08:312
104972220191,19sleep00-21swapper/007:05:100
104942200165,24sleep30-21swapper/307:05:103
36032570,2sleep00-21swapper/009:15:020
1255999350,15cyclictest0-21swapper/310:21:483
1255999331,25cyclictest0-21swapper/307:49:573
1255999331,24cyclictest0-21swapper/307:40:433
1255999330,25cyclictest0-21swapper/307:22:273
1255999321,21cyclictest0-21swapper/308:51:533
1255999321,21cyclictest0-21swapper/308:51:533
1255999321,14cyclictest0-21swapper/312:11:423
1255999321,14cyclictest0-21swapper/311:55:153
1255999321,12cyclictest0-21swapper/308:10:363
1255999311,6cyclictest0-21swapper/311:09:013
1255999311,3cyclictest0-21swapper/311:02:443
1255999311,14cyclictest0-21swapper/311:10:393
1255999311,13cyclictest0-21swapper/310:31:003
1255999310,14cyclictest0-21swapper/311:41:153
1255999301,14cyclictest0-21swapper/312:35:023
1255999301,13cyclictest0-21swapper/308:35:223
1255999301,12cyclictest0-21swapper/309:23:153
1255999300,13cyclictest0-21swapper/307:27:473
1254699301,25cyclictest16309-21munin-run12:15:011
1254699301,23cyclictest0-21swapper/111:40:111
1254699301,15cyclictest0-21swapper/109:56:321
1255999291,18cyclictest0-21swapper/308:20:083
1255999291,12cyclictest0-21swapper/310:28:123
1255999291,12cyclictest0-21swapper/307:31:073
1255999291,11cyclictest0-21swapper/309:52:033
1255999291,11cyclictest0-21swapper/307:59:243
1255999291,11cyclictest0-21swapper/307:18:253
1255999291,10cyclictest15413-21/usr/sbin/munin09:40:173
1255999290,12cyclictest0-21swapper/311:35:073
1255999290,12cyclictest0-21swapper/310:05:183
1255999290,12cyclictest0-21swapper/310:05:183
1254699291,19cyclictest18496-21latency_hist12:20:011
1255999281,13cyclictest0-21swapper/311:47:473
1255999281,13cyclictest0-21swapper/309:37:093
1255999281,12cyclictest0-21swapper/312:24:353
1255999281,12cyclictest0-21swapper/308:41:183
1255999281,12cyclictest0-21swapper/308:32:203
1255999281,12cyclictest0-21swapper/308:17:483
1255999281,11cyclictest0-21swapper/309:27:553
1255999280,12cyclictest0-21swapper/310:50:443
1255999280,11cyclictest0-21swapper/311:50:033
1254699283,12cyclictest27012-21munin-run08:55:011
1254699283,12cyclictest27012-21munin-run08:55:011
1254699281,15cyclictest0-21swapper/110:50:011
1254699280,26cyclictest0-21swapper/112:20:241
1254299289,16cyclictest21050-21awk09:55:000
1255999279,8cyclictest0-21swapper/309:30:213
1255999271,5cyclictest0-21swapper/310:56:183
1255999271,13cyclictest0-21swapper/310:44:203
1255999271,13cyclictest0-21swapper/310:19:483
1255999271,12cyclictest0-21swapper/311:29:393
1255999271,12cyclictest0-21swapper/310:35:043
1255999271,12cyclictest0-21swapper/307:38:193
1255999271,11cyclictest0-21swapper/312:16:083
1255999271,11cyclictest0-21swapper/310:10:443
1255999271,11cyclictest0-21swapper/309:06:593
1255999271,11cyclictest0-21swapper/308:29:403
1255999270,11cyclictest0-21swapper/310:00:553
1255999270,10cyclictest0-21swapper/312:34:363
1255999270,10cyclictest0-21swapper/312:34:363
1254699278,6cyclictest0-21swapper/110:38:141
1254699271,5cyclictest0-21swapper/111:07:511
1254699271,11cyclictest0-21swapper/110:01:531
167402260,4sleep230-21rcuc/207:15:242
1255999261,12cyclictest0-21swapper/309:15:453
1255999261,10cyclictest0-21swapper/311:33:553
1255999260,12cyclictest0-21swapper/311:24:593
1255999260,12cyclictest0-21swapper/311:24:593
1254699261,21cyclictest1715-21latency07:55:181
1254299269,15cyclictest29854-21perf10:15:010
234192251,2sleep00-21swapper/008:45:170
1255999251,2cyclictest0-21swapper/308:56:393
1255999251,13cyclictest0-21swapper/308:07:523
1255999251,12cyclictest0-21swapper/312:29:563
1255999251,12cyclictest0-21swapper/309:04:033
1255999251,10cyclictest0-21swapper/309:13:233
1255999250,12cyclictest0-21swapper/307:53:153
1255399256,3cyclictest12050irq/123-ahci[0010:40:012
12553992512,3cyclictest5045-21awk08:05:022
1254699253,10cyclictest12947-21wc12:00:271
1254699251,21cyclictest9762-21sh10:40:221
1254699251,21cyclictest23906-21date11:15:011
1254699251,21cyclictest21130-21cat09:55:021
1254699251,21cyclictest18255-21sort07:20:171
1254699251,21cyclictest1723-21expr09:10:141
1254699251,21cyclictest0-21swapper/108:05:151
1254699251,11cyclictest800-21sshd07:25:121
1254699251,11cyclictest26702-21fschecks_count11:20:151
1254699251,11cyclictest26702-21fschecks_count11:20:151
1254699251,10cyclictest26586-21memory10:05:191
1254699251,10cyclictest26586-21memory10:05:191
1254699251,10cyclictest2451-21/usr/sbin/munin10:25:161
12546992510,3cyclictest87150irq/128-enp1s0-11:00:101
12546992510,3cyclictest14057-21users09:35:241
1255999241,9cyclictest0-21swapper/312:06:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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