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2026-05-25 - 03:38

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 50 highest latencies:
System rack0slot3s.osadl.org (updated Mon May 25, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19323152280273,4sleep50-21swapper/519:07:195
19324322262215,16sleep40-21swapper/419:08:394
19323132260214,16sleep30-21swapper/319:07:173
19324362259214,16sleep70-21swapper/719:08:427
19325152249239,7sleep60-21swapper/619:09:386
19322282244218,16sleep20-21swapper/219:06:282
19322932243217,17sleep10-21swapper/119:07:071
19321802243218,16sleep00-21swapper/019:05:540
193285299370,36cyclictest0-21swapper/322:14:123
1932838993633,2cyclictest1391-21snmpd20:33:480
1932860993533,1cyclictest1391-21snmpd21:05:465
1932847993533,1cyclictest1391-21snmpd21:33:262
193283899350,1cyclictest0-21swapper/000:35:440
1932852993432,1cyclictest1742608-21kworker/3:2+events22:55:233
193285699339,23cyclictest0-21swapper/423:45:584
1932856993332,1cyclictest0-21swapper/421:05:464
193285699320,31cyclictest0-21swapper/422:19:524
1932860992927,1cyclictest1391-21snmpd23:56:245
1932838992913,10cyclictest0-21swapper/023:43:420
1932869992722,3cyclictest1978863-21memory20:30:177
193286999270,25cyclictest0-21swapper/723:45:477
193286999270,25cyclictest0-21swapper/720:13:247
1932838992721,5cyclictest1391-21snmpd21:54:320
193286999262,3cyclictest1975973-21/usr/sbin/munin20:25:157
1932869992622,2cyclictest2028439-21ntpq22:00:197
1932869992622,2cyclictest2028439-21ntpq22:00:197
193286999260,24cyclictest0-21swapper/721:39:437
193286099260,24cyclictest0-21swapper/522:16:095
1932856992622,3cyclictest1391-21snmpd22:39:134
193285699260,24cyclictest0-21swapper/421:57:184
193284399260,24cyclictest0-21swapper/121:57:361
193284399260,22cyclictest0-21swapper/120:04:181
193284399260,22cyclictest0-21swapper/100:25:131
1932838992622,3cyclictest1973203-21cat20:20:150
1932838992621,4cyclictest1391-21snmpd22:45:490
1932838992621,4cyclictest1391-21snmpd20:27:350
1932838992621,4cyclictest1391-21snmpd20:19:480
193283899260,25cyclictest0-21swapper/023:18:020
193283899260,25cyclictest0-21swapper/020:05:090
193283899260,23cyclictest0-21swapper/023:50:330
193283899260,22cyclictest0-21swapper/022:07:180
1932869992520,4cyclictest2013291-21cut21:34:597
1932869992520,3cyclictest1974184-21users20:20:257
1932869992518,5cyclictest1937869-21ntpq19:15:197
1932869992512,11cyclictest0-21swapper/720:55:197
1932869992512,11cyclictest0-21swapper/719:49:597
193286999250,23cyclictest0-21swapper/723:27:087
1932865992521,3cyclictest2082973-21cat23:40:156
193286099250,23cyclictest0-21swapper/522:56:135
1932856992521,3cyclictest1391-21snmpd21:24:114
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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