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2022-05-28 - 13:29

x86 Intel T1300 @1667 MHz, Linux 4.16.15-rt7 (Profile)

Latency plot of system in rack #6, slot #2
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 rack6slot2.osadl.org (updated Sat May 28, 2022 00:43:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
181942469,8sleep00-21swapper/019:06:210
1814724517,8sleep10-21swapper/119:05:501
18489993635,0cyclictest248850irq/16-enp2s0f022:39:020
18489993627,7cyclictest248850irq/16-enp2s0f022:59:020
18490993534,0cyclictest168050irq/16-i91521:38:571
18489993534,0cyclictest248850irq/16-enp2s0f020:54:060
18489993534,0cyclictest248850irq/16-enp2s0f019:59:280
18490993434,0cyclictest168050irq/16-i91519:38:431
18490993433,0cyclictest248850irq/16-enp2s0f022:41:031
18490993432,1cyclictest190450irq/16-nvkm00:24:011
18490993432,1cyclictest168050irq/16-i91523:54:021
18490993432,1cyclictest168050irq/16-i91522:13:571
18490993432,1cyclictest168050irq/16-i91521:24:321
18489993434,0cyclictest248850irq/16-enp2s0f020:59:010
18489993433,0cyclictest248850irq/16-enp2s0f023:59:290
18489993433,0cyclictest248850irq/16-enp2s0f023:49:040
18489993433,0cyclictest248850irq/16-enp2s0f023:44:000
18489993433,0cyclictest248850irq/16-enp2s0f023:34:010
18489993433,0cyclictest248850irq/16-enp2s0f023:29:000
18489993433,0cyclictest248850irq/16-enp2s0f022:18:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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