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2023-06-07 - 11:12

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 Wed Jun 07, 2023 00:46:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9899210893sleep00-21swapper/019:06:240
122501080irq/42-ahci0-21swapper/319:09:035
9958210694sleep80-21swapper/819:07:0810
122501000irq/42-ahci0-21swapper/119:09:381
884350940irq/52-eth0-rx-0-21swapper/1119:06:023
884350920irq/52-eth0-rx-0-21swapper/219:05:184
884350880irq/52-eth0-rx-0-21swapper/519:05:267
12250880irq/42-ahci0-21swapper/419:08:166
1021228479sleep70-21swapper/719:09:559
990728169sleep60-21swapper/619:06:308
12250700irq/42-ahci0-21swapper/1019:08:222
1018826462sleep90-21swapper/919:09:3311
1033799360cyclictest0-21swapper/021:12:460
1033799340cyclictest0-21swapper/019:28:090
1033799320cyclictest0-21swapper/020:15:170
1037699290cyclictest0-21swapper/1122:15:483
1037699290cyclictest0-21swapper/1121:20:353
173350280irq/56-eth1-rx-0-21swapper/119:28:071
12250280irq/42-ahci0-21swapper/219:28:074
10373992725cyclictest13450irq/18-ehci_hcd21:12:4610
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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