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2019-07-16 - 02:32

AMD G-T48L Processor, Linux 3.14.58-rt59 (Profile)

Latency plot of system in rack #c, slot #3
Data to construct the above plot have been generated using the RT test utility cyclictest.
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
The worst-case latency is NOT higher under extreme CPU load.
Results of all systems under extreme CPU load are combined on this summary graph.
Characteristics of the 20 highest latencies:
System rackcslot3.osadl.org (updated Mon Jul 15, 2019 00:43:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
88650540irq/17-ehci_hcd24638-21runrttasks19:15:241
24915995249cyclictest181ksoftirqd/100:41:541
24915995149cyclictest181ksoftirqd/100:23:111
24915995148cyclictest955-21usb-storage21:14:201
24915995148cyclictest955-21usb-storage19:30:501
24915995148cyclictest181ksoftirqd/121:40:001
24915995148cyclictest181ksoftirqd/100:15:161
24915995048cyclictest955-21usb-storage19:26:201
24915995048cyclictest181ksoftirqd/123:16:291
24915995048cyclictest181ksoftirqd/122:43:101
24915995048cyclictest181ksoftirqd/121:58:101
24915995047cyclictest955-21usb-storage19:43:361
24915995047cyclictest2273-21snmpd23:29:431
24915995047cyclictest181ksoftirqd/123:04:491
24915995047cyclictest181ksoftirqd/122:22:401
24914995048cyclictest955-21usb-storage22:18:140
24914995047cyclictest955-21usb-storage22:40:250
150950500irq/44-eth0-rx-31ksoftirqd/022:13:180
150950500irq/44-eth0-rx-31ksoftirqd/000:04:290
24915994946cyclictest181ksoftirqd/100:09:591
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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