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2026-03-22 - 01:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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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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 rackbslot8s (updated Sat Mar 21, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
16096792145130,10sleep30-21swapper/307:07:423
1609518212393,10sleep00-21swapper/007:05:220
16095202118103,10sleep20-21swapper/207:05:242
16096592117105,8sleep10-21swapper/107:07:241
16097302116102,9sleep70-21swapper/707:08:257
16095982116101,10sleep50-21swapper/507:06:305
16096352115101,9sleep40-21swapper/407:07:024
16095902115100,10sleep60-21swapper/607:06:236
161008399109108,1cyclictest553-21snmpd10:58:175
1610078991030,100cyclictest0-21swapper/408:15:134
16100869910298,4cyclictest553-21snmpd10:59:566
16100869910298,4cyclictest553-21snmpd09:19:396
16100869910298,4cyclictest1672735-21cat09:10:156
16100789910299,3cyclictest553-21snmpd10:43:244
16100789910299,3cyclictest553-21snmpd09:55:224
16100789910299,3cyclictest553-21snmpd07:44:084
16100679910299,3cyclictest553-21snmpd07:26:291
1610067991020,99cyclictest0-21swapper/108:58:291
1610067991020,100cyclictest0-21swapper/111:46:141
16100639910299,2cyclictest553-21snmpd12:08:410
1610091991010,100cyclictest0-21swapper/712:28:437
1610091991010,100cyclictest0-21swapper/711:47:027
16100869910199,2cyclictest553-21snmpd12:31:016
16100869910199,2cyclictest553-21snmpd07:13:286
16100869910199,2cyclictest0-21swapper/609:05:056
16100869910198,3cyclictest553-21snmpd07:37:046
161008699101100,1cyclictest553-21snmpd08:31:546
1610086991010,101cyclictest0-21swapper/609:41:076
1610086991010,101cyclictest0-21swapper/609:01:356
16100839910199,2cyclictest553-21snmpd09:24:565
16100839910199,2cyclictest1717774-21cat09:50:135
16100839910199,1cyclictest553-21snmpd11:48:205
161008399101100,1cyclictest553-21snmpd08:45:115
161008399101100,1cyclictest1616860-21cat07:20:145
16100769910199,2cyclictest553-21snmpd11:09:523
16100769910199,1cyclictest605-21lldpd12:32:373
1610072991010,101cyclictest0-21swapper/211:41:342
1610072991010,100cyclictest0-21swapper/209:25:482
16100679910198,3cyclictest553-21snmpd08:51:591
16100679910198,3cyclictest553-21snmpd08:51:591
1610067991010,100cyclictest0-21swapper/111:27:111
1610067991010,100cyclictest0-21swapper/108:45:431
1610067991010,100cyclictest0-21swapper/108:42:081
1610067991010,100cyclictest0-21swapper/107:58:181
16100919910098,2cyclictest0-21swapper/711:10:047
1610091991000,99cyclictest0-21swapper/711:51:237
1610091991000,99cyclictest0-21swapper/711:22:107
1610091991000,99cyclictest0-21swapper/711:18:587
1610091991000,99cyclictest0-21swapper/708:12:207
1610091991000,99cyclictest0-21swapper/707:39:567
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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