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2022-05-28 - 15:46

x86 Intel Core i7-X990 @3467 MHz, Linux 4.9.47-rt37 (Profile)

Latency plot of system in rack #c, slot #1
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
Characteristics of the 20 highest latencies:
System rackcslot1.osadl.org (updated Sat May 28, 2022 12:48:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3954991210,115rtkit-daemon0-21swapper/407:06:166
1605421180,0sleep111341ktimersoftd/1110:32:513
2952428172,6sleep110-21swapper/1107:07:153
2962727666,7sleep50-21swapper/507:08:457
2964427161,7sleep90-21swapper/907:09:0111
2955527163,6sleep10-21swapper/107:07:411
2954727061,6sleep60-21swapper/607:07:348
207632700,0sleep111341ktimersoftd/1111:54:003
2955126947,7sleep100-21swapper/1007:07:382
2962526858,7sleep30-21swapper/307:08:435
2968426555,7sleep80-21swapper/807:09:3610
2944526152,6sleep20-21swapper/207:06:054
2970926042,7sleep00-21swapper/007:09:520
2892126051,6sleep70-21swapper/707:05:229
129022580,1sleep40-21swapper/407:30:226
217952550,1sleep30-21swapper/311:55:285
279962510,1sleep30-21swapper/312:09:545
152702400,1sleep7105250irq/36-p5p1-TxR11:41:079
3019899310,30cyclictest0-21swapper/208:10:224
30198992622,3cyclictest0-21swapper/211:02:044
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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