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2023-03-26 - 03:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 
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x86 Intel Celeron 33455 @1500 MHz, Linux 5.15.2-rt19 (Profile)

Latency plot of shadow in rack #c, slot #7
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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 rackcslot7s.osadl.org (updated Sat Mar 25, 2023 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26816889913377,48cyclictest881337-21WRRende~ckend#110:15:452
26816819910849,51cyclictest881337-21WRRende~ckend#109:04:270
2681686991073,13cyclictest880966-21IPC1
2681681991053,92cyclictest880898-21Xwayland11:28:350
2681688991043,17cyclictest1753-21gnome-shell08:27:592
26816869910444,56cyclictest881356-21Isolated14:31:441
2681686991043,12cyclictest881356-21Isolated14:31:441
268107421040,14sleep013-21ksoftirqd/007:05:490
268107421040,14sleep013-21ksoftirqd/007:05:490
2681681991033,91cyclictest1753-21gnome-shell11:02:580
2681688991022,95cyclictest880898-21Xwayland08:01:372
2681681991022,90cyclictest880898-21Xwayland12:14:230
2681681991022,90cyclictest880898-21Xwayland12:14:230
2681681991022,14cyclictest880898-21Xwayland12:08:390
2681686991012,14cyclictest880898-21Xwayland11:26:211
2681681991018,89cyclictest13-21ksoftirqd/010:23:320
2681681991013,12cyclictest881356-21Isolated14:31:440
2681681991012,95cyclictest880898-21Xwayland08:09:220
26816819910127,62cyclictest881262-21Compositor12:20:400
2681688991003,10cyclictest0-21swapper/212:06:582
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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