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2026-06-27 - 20:13

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 Jun 27, 2026 12:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17649572123108,10sleep20-21swapper/207:08:522
1764819212194,22sleep30-21swapper/307:06:533
1764988211498,10sleep60-21swapper/607:09:216
1764965211498,10sleep10-21swapper/107:08:591
17648472114100,9sleep40-21swapper/407:07:184
1764946211197,9sleep00-21swapper/007:08:430
1764877210894,9sleep50-21swapper/507:07:435
1765000210792,10sleep70-21swapper/707:09:307
17652809910399,4cyclictest553-21snmpd09:11:332
17652809910397,3cyclictest553-21snmpd10:29:022
1765280991030,100cyclictest0-21swapper/209:03:172
1765302991020,1cyclictest0-21swapper/711:26:197
1765302991020,100cyclictest0-21swapper/709:36:307
1765280991020,101cyclictest0-21swapper/207:23:562
17652769910299,3cyclictest553-21snmpd08:36:201
1765276991020,101cyclictest0-21swapper/111:50:481
1765274991020,99cyclictest0-21swapper/008:50:160
1765274991020,0cyclictest0-21swapper/009:55:130
1765302991010,101cyclictest0-21swapper/711:33:207
1765302991010,101cyclictest0-21swapper/707:58:137
1765302991010,0cyclictest0-21swapper/712:14:187
1765288991010,100cyclictest0-21swapper/410:32:204
17652859910199,2cyclictest553-21snmpd09:42:253
17652809910198,3cyclictest553-21snmpd10:56:252
1765280991010,101cyclictest0-21swapper/209:50:402
17652769910199,2cyclictest553-21snmpd10:15:591
17652769910199,2cyclictest553-21snmpd07:28:381
17652769910199,2cyclictest553-21snmpd07:17:381
17652769910198,3cyclictest553-21snmpd11:46:001
17652769910198,3cyclictest553-21snmpd08:22:011
17652769910198,3cyclictest553-21snmpd08:22:001
1765276991010,99cyclictest0-21swapper/108:27:041
1765276991010,98cyclictest0-21swapper/112:20:031
1765276991010,100cyclictest0-21swapper/112:37:521
17652749910198,3cyclictest553-21snmpd12:39:220
17652749910198,3cyclictest553-21snmpd11:45:030
17652749910198,3cyclictest553-21snmpd10:34:180
1765274991010,100cyclictest0-21swapper/009:32:490
1765302991000,99cyclictest0-21swapper/709:02:187
1765302991000,100cyclictest0-21swapper/712:06:467
1765302991000,100cyclictest0-21swapper/708:07:247
17652979910099,1cyclictest553-21snmpd09:06:146
17652979910099,1cyclictest553-21snmpd08:18:256
17652979910099,1cyclictest553-21snmpd08:18:246
17652979910099,1cyclictest553-21snmpd08:14:526
17652979910099,1cyclictest553-21snmpd07:30:096
17652979910099,1cyclictest553-21snmpd07:26:086
1765297991000,100cyclictest0-21swapper/608:56:066
1765297991000,100cyclictest0-21swapper/607:55:536
17652939910099,1cyclictest553-21snmpd11:43:205
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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