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2024-07-27 - 07:43

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 Jul 27, 2024 00:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32725911220,8ptp4l2003-21kworker/1:100:47:301
220022950,9sleep0424199cyclictest04:02:430
184032870,7sleep0424199cyclictest03:18:580
3272591840,1ptp4l241ktimersoftd/105:54:281
424199790,8cyclictest9503-21ssh04:25:370
424199790,8cyclictest6539-21ssh04:23:010
424199780,8cyclictest629-21ssh05:31:540
424199780,8cyclictest25180-21ssh06:01:020
424199750,7cyclictest4709-21/usr/sbin/munin04:58:380
424199750,6cyclictest23778-21diskmemload05:05:060
424199730,8cyclictest550-21hddtemp_smartct02:58:360
424199730,7cyclictest18996-21ssh05:14:060
3272591730,1ptp4l241ktimersoftd/103:21:251
424199720,6cyclictest29707-21seq06:07:140
424199720,6cyclictest28623-21ssh05:26:260
424199710,6cyclictest540-21runrttasks06:10:190
424199710,6cyclictest13046-21runrttasks01:05:380
424199700,6cyclictest27811-21seq04:47:410
424199690,4cyclictest23778-21diskmemload05:55:340
424699646,16cyclictest7213-21snmp_o5powerctl05:38:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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