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2025-02-11 - 00:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot6s.osadl.org (updated Mon Feb 10, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4297999432,13cyclictest0-21swapper/006:23:220
430299774,65cyclictest0-21swapper/209:33:102
28962660,5sleep32979-21hwlatdetect08:23:053
200032644,51sleep20-21swapper/207:53:022
4303996238,18cyclictest16459-21munin-node06:38:113
4303996142,12cyclictest22256-21sort07:57:453
4303996141,12cyclictest1263-21runrttasks09:08:323
4303996043,11cyclictest1263-21runrttasks09:28:193
4303996042,12cyclictest11880-21cpu06:28:013
4303996040,12cyclictest28388-21munin-node09:32:483
4303996038,16cyclictest26866-21runrttasks08:06:553
4301996041,13cyclictest0-21swapper/109:07:421
4303995941,12cyclictest28385-21runrttasks07:02:563
430299594,31cyclictest0-21swapper/211:38:052
430199594,48cyclictest0-21swapper/107:13:001
430199594,48cyclictest0-21swapper/107:13:001
4303995841,12cyclictest9682-21ls06:23:033
4303995841,11cyclictest14796-21taskset07:40:203
4303995840,12cyclictest27150-21head09:23:133
4303995840,12cyclictest27150-21head09:23:133
4303995840,12cyclictest12458-21sshd08:50:553
4303995840,11cyclictest23887-21gltestperf09:18:023
430399584,34cyclictest0-21swapper/310:12:473
4303995839,12cyclictest1138-21snmpd07:45:383
4301995838,15cyclictest0-21swapper/107:53:081
81602573,13sleep20-21swapper/207:27:582
52732573,46sleep20-21swapper/206:13:092
4303995740,11cyclictest5706-21aten_r1power_cu07:22:583
4303995739,12cyclictest29100-21sshd08:09:563
4303995739,12cyclictest1138-21snmpd07:00:503
430299575,29cyclictest0-21swapper/208:18:172
4302995740,10cyclictest6775-21grep08:33:132
4303995639,11cyclictest2040-21sed07:13:133
4303995639,11cyclictest2040-21sed07:13:133
4303995639,11cyclictest11139-21runrttasks10:08:503
4303995638,12cyclictest26293-21chrt10:46:413
430399563,46cyclictest0-21swapper/309:03:093
4302995639,11cyclictest11359-21grep11:32:512
4302995639,11cyclictest11359-21grep11:32:512
4302995620,14cyclictest0-21swapper/210:52:552
4302995620,14cyclictest0-21swapper/210:52:552
4303995537,12cyclictest2711-21munin-node11:12:473
4303995537,11cyclictest8308-21cpuspeed07:27:593
4303995514,34cyclictest0-21swapper/309:47:173
430299555,30cyclictest0-21swapper/209:42:402
430299555,29cyclictest0-21swapper/210:57:532
430299555,28cyclictest0-21swapper/209:42:512
430299554,29cyclictest0-21swapper/211:22:542
430299554,29cyclictest0-21swapper/211:18:032
430299554,28cyclictest0-21swapper/210:37:532
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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