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2024-04-23 - 19:44

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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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 rackbslot8s (updated Tue Apr 23, 2024 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18605062137122,10sleep10-21swapper/107:06:261
1860993991290,129cyclictest0-21swapper/212:00:492
18606492126112,9sleep50-21swapper/507:08:325
18605632121106,10sleep20-21swapper/207:07:172
18604392121107,9sleep00-21swapper/007:05:300
186099399120119,1cyclictest0-21swapper/212:11:402
18607042120106,9sleep40-21swapper/407:09:194
18605082120106,9sleep30-21swapper/307:06:293
186099399119119,0cyclictest0-21swapper/210:47:092
1860437211997,9sleep70-21swapper/707:05:297
18604932118104,9sleep60-21swapper/607:06:166
18609939910520,84cyclictest1874155-21kworker/2:208:12:032
18610029910299,2cyclictest721930-21snmpd10:44:484
18610029910299,2cyclictest721930-21snmpd10:44:474
18609899910299,3cyclictest721930-21snmpd07:49:271
1861012991010,99cyclictest0-21swapper/711:37:147
1861012991010,101cyclictest0-21swapper/712:14:087
1861012991010,101cyclictest0-21swapper/708:24:257
1861012991010,0cyclictest0-21swapper/712:28:287
18610059910199,2cyclictest721930-21snmpd12:32:035
18610029910199,2cyclictest721930-21snmpd12:12:484
18610029910199,2cyclictest721930-21snmpd11:52:294
1861002991010,100cyclictest0-21swapper/411:05:334
1861002991010,100cyclictest0-21swapper/407:12:114
18609989910199,2cyclictest721930-21snmpd09:48:553
18609989910199,2cyclictest721930-21snmpd09:27:063
18609989910199,2cyclictest721930-21snmpd08:42:143
18609989910199,2cyclictest721930-21snmpd08:31:583
18609989910199,2cyclictest721930-21snmpd08:20:283
18609989910199,2cyclictest721930-21snmpd07:42:003
18609989910199,2cyclictest721930-21snmpd07:10:323
18609899910198,3cyclictest721930-21snmpd10:42:061
18609899910198,3cyclictest721930-21snmpd10:42:061
1860989991010,100cyclictest0-21swapper/112:31:341
1860989991010,0cyclictest0-21swapper/108:14:521
18610129910098,2cyclictest0-21swapper/709:56:527
1861012991000,99cyclictest0-21swapper/711:46:017
1861012991000,100cyclictest0-21swapper/709:48:437
1861012991000,100cyclictest0-21swapper/709:24:187
1861012991000,100cyclictest0-21swapper/707:54:097
1861012991000,100cyclictest0-21swapper/707:44:217
18610099910099,1cyclictest721930-21snmpd07:22:346
18610099910098,2cyclictest721930-21snmpd09:27:486
1861009991000,99cyclictest0-21swapper/611:24:376
1861009991000,99cyclictest0-21swapper/610:14:236
1861009991000,99cyclictest0-21swapper/608:28:496
1861009991000,100cyclictest0-21swapper/608:59:026
18610059910099,1cyclictest721930-21snmpd12:35:345
18610059910099,1cyclictest721930-21snmpd11:48:265
18610059910099,1cyclictest721930-21snmpd10:00:165
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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