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2022-05-27 - 17:41

x86 Intel Core i7-X980 @3333 MHz, Linux 3.12.31-rt45 (Profile)

Latency plot of system in rack #3, slot #3
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 rack3slot3.osadl.org (updated Fri May 27, 2022 12:46:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26711501170irq/53-eth0-tx-0-21swapper/707:05:239
21820211195sleep00-21swapper/007:07:560
21712210894sleep90-21swapper/907:06:2811
21785210391sleep60-21swapper/607:07:258
11850960irq/42-ahci0-21swapper/407:06:356
11850960irq/42-ahci0-21swapper/107:05:071
2671150930irq/53-eth0-tx-0-21swapper/207:08:254
2671050910irq/52-eth0-rx-0-21swapper/1007:05:202
11850890irq/42-ahci0-21swapper/307:08:515
117550870irq/18-i801_smb0-21swapper/807:08:2810
13050820irq/18-ehci_hcd0-21swapper/507:08:277
2671150580irq/53-eth0-tx-0-21swapper/1107:05:133
2213399310cyclictest0-21swapper/007:20:380
22133992712cyclictest174102chrt09:13:090
2213399220cyclictest0-21swapper/008:11:040
2217399192cyclictest0-21swapper/911:55:2211
2217199195cyclictest0-21swapper/709:35:189
22170991916cyclictest2262-21qemu-kvm08:13:458
2213399190cyclictest0-21swapper/009:09:530
2213399190cyclictest0-21swapper/009:09:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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