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2025-11-17 - 19:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #5

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 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 50 highest latencies:
System rack0slot5s.osadl.org (updated Mon Nov 17, 2025 00:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13817582363319,14sleep70-21swapper/719:07:5713
13776872351310,14sleep110-21swapper/1119:05:043
13817762344322,14sleep80-21swapper/819:08:1414
13816542341319,14sleep140-21swapper/1419:06:276
13816532341319,14sleep130-21swapper/1319:06:275
13816272341303,14sleep40-21swapper/419:06:0110
13818872340318,14sleep90-21swapper/919:09:5215
13818442340317,14sleep30-21swapper/319:09:139
13818702339317,14sleep120-21swapper/1219:09:394
13816842339317,14sleep50-21swapper/519:06:5111
13816212339317,14sleep150-21swapper/1519:05:567
13817682337315,14sleep00-21swapper/019:08:060
13817612336314,14sleep100-21swapper/1019:08:002
13816292336314,14sleep60-21swapper/619:06:0312
13816592335314,13sleep20-21swapper/219:06:318
13816242332310,14sleep10-21swapper/119:05:581
138221399420,41cyclictest0-21swapper/723:17:5413
1382191994240,1cyclictest0-21swapper/023:53:250
1382246993939,0cyclictest0-21swapper/1523:17:557
138220399360,30cyclictest0-21swapper/420:46:0510
138220399360,30cyclictest0-21swapper/420:46:0410
1382203993535,0cyclictest0-21swapper/423:53:2610
138223199318,1cyclictest0-21swapper/1222:07:094
1382228993030,0cyclictest0-21swapper/1123:53:263
138222699300,1cyclictest0-21swapper/1019:49:092
138224699290,29cyclictest0-21swapper/1519:21:297
1382234992929,0cyclictest0-21swapper/1323:50:405
138219399290,1cyclictest0-21swapper/123:56:441
1382241992827,1cyclictest1474-21snmpd00:04:536
138223499280,27cyclictest0-21swapper/1323:49:205
138223199280,27cyclictest0-21swapper/1221:32:094
138223199280,27cyclictest0-21swapper/1220:01:424
1382228992827,1cyclictest0-21swapper/1100:07:053
138222899280,27cyclictest0-21swapper/1121:32:543
138222899280,27cyclictest0-21swapper/1119:55:243
138222699285,1cyclictest0-21swapper/1021:37:092
138222699280,27cyclictest0-21swapper/1023:41:442
138222699280,27cyclictest0-21swapper/1021:24:022
138222699280,27cyclictest0-21swapper/1019:53:242
1382221992826,2cyclictest1474-21snmpd21:03:3215
1382213992827,1cyclictest0-21swapper/722:04:5813
138221399280,27cyclictest0-21swapper/721:57:1913
138221199280,27cyclictest0-21swapper/619:25:2312
138221199280,27cyclictest0-21swapper/600:01:3812
138220899280,27cyclictest0-21swapper/523:30:4611
138220899280,27cyclictest0-21swapper/519:44:1711
138220899280,27cyclictest0-21swapper/500:02:2811
138220199280,27cyclictest0-21swapper/319:21:249
138220199280,27cyclictest0-21swapper/300:35:419
1382198992826,1cyclictest1474-21snmpd21:49:488
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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