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2025-05-02 - 12:56

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 Fri May 02, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17563442135121,9sleep60-21swapper/619:07:456
17564402129115,9sleep10-21swapper/119:09:081
17562932127112,10sleep20-21swapper/219:07:012
1756341212596,10sleep30-21swapper/319:07:423
17562392122108,9sleep40-21swapper/419:06:154
17561952120105,10sleep50-21swapper/519:05:355
17563542118104,9sleep70-21swapper/719:07:537
17563272118104,9sleep00-21swapper/019:07:310
175674899103100,3cyclictest573-21snmpd23:25:195
17567369910399,2cyclictest573-21snmpd20:02:462
1756736991030,100cyclictest0-21swapper/200:16:182
17567529910299,3cyclictest573-21snmpd22:19:046
17567529910299,3cyclictest573-21snmpd00:19:576
1756752991020,99cyclictest0-21swapper/622:40:566
17567489910299,3cyclictest573-21snmpd19:53:265
17567489910298,4cyclictest573-21snmpd00:24:555
17567369910299,1cyclictest573-21snmpd22:21:532
17567369910299,0cyclictest573-21snmpd00:32:312
17567329910299,2cyclictest573-21snmpd20:40:291
1756755991010,99cyclictest0-21swapper/700:12:547
1756755991010,101cyclictest0-21swapper/723:25:347
17567529910199,2cyclictest573-21snmpd19:53:206
17567529910198,3cyclictest573-21snmpd21:28:126
1756752991010,99cyclictest0-21swapper/620:00:336
1756752991010,100cyclictest0-21swapper/623:29:196
17567489910199,2cyclictest573-21snmpd23:21:495
17567459910199,1cyclictest1900466-21cat22:25:174
1756745991010,100cyclictest0-21swapper/420:50:234
1756745991010,100cyclictest0-21swapper/419:42:424
1756745991010,100cyclictest0-21swapper/400:17:504
1756745991010,100cyclictest0-21swapper/400:00:004
17567419910199,2cyclictest573-21snmpd20:56:533
17567369910199,2cyclictest573-21snmpd23:29:432
17567369910199,2cyclictest573-21snmpd00:08:452
17567369910198,2cyclictest573-21snmpd23:53:382
175673699101100,1cyclictest573-21snmpd22:27:532
1756736991010,99cyclictest0-21swapper/220:48:442
1756736991010,100cyclictest0-21swapper/221:38:122
17567329910199,2cyclictest573-21snmpd22:12:531
17567329910199,2cyclictest573-21snmpd20:55:581
17567329910199,2cyclictest573-21snmpd20:37:291
17567329910199,2cyclictest573-21snmpd19:48:121
175673299101100,1cyclictest573-21snmpd23:50:021
175673299101100,1cyclictest573-21snmpd21:50:521
17567279910199,1cyclictest573-21snmpd20:39:020
1756755991000,99cyclictest0-21swapper/719:52:487
1756755991000,99cyclictest0-21swapper/700:07:307
1756755991000,100cyclictest0-21swapper/722:34:537
1756755991000,100cyclictest0-21swapper/720:10:377
17567529910099,1cyclictest573-21snmpd23:07:096
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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