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2024-06-15 - 13:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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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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 20 highest latencies:
System rackbslot6s.osadl.org (updated Sat Jun 15, 2024 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32725911440,4ptp4l241ktimersoftd/100:30:161
32725911440,4ptp4l241ktimersoftd/100:30:161
32725911120,1ptp4l241ktimersoftd/105:21:301
32725911090,1ptp4l241ktimersoftd/102:14:451
32725911020,2ptp4l241ktimersoftd/102:39:231
3272591990,2ptp4l241ktimersoftd/104:16:171
3272591990,1ptp4l241ktimersoftd/105:43:351
3272591980,13ptp4l241ktimersoftd/104:37:021
228442970,6sleep122842-21ssh04:24:411
228442970,6sleep122842-21ssh04:24:411
8972880,8sleep11870199cyclictest04:39:311
3272591880,2ptp4l241ktimersoftd/102:53:021
3272591880,1ptp4l241ktimersoftd/105:44:181
3272591870,1ptp4l241ktimersoftd/103:37:241
3272591860,2ptp4l241ktimersoftd/103:09:481
3272591850,2ptp4l241ktimersoftd/104:08:061
3272591840,2ptp4l241ktimersoftd/105:49:211
3272591820,2ptp4l241ktimersoftd/103:45:171
3272591790,1ptp4l241ktimersoftd/104:47:051
3272591770,1ptp4l241ktimersoftd/103:25:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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