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HilscherAutomation / netPI-netx-ethernet-lan

Sources of Dockerfile generated Docker image "TCP/IP over RTE Industrial Ethernet ports"
MIT License
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RT Ethernet with custom packages #1

Closed choeffer closed 6 years ago

choeffer commented 6 years ago

Based on this docker image, is it possible to sent custom Ethernet packages e.g. with 7 micro seconds pause between each to simulate 97% network load? The task is to simulate e.g. 97% or 95% network load with a constant package flow. Jitter of 1-2 mico seconds would not be an issue, but 90-110 packages each milli second would be. In average it would be 100 packages per milli second but not with a constant rate. As the netPI is suitable for RT communication, it would be interesting to know if custom applications with this requirements can be created.

hilschernetpi commented 6 years ago

I am sorry to say that this is not possible with netPI's overall structure. The netPI CPU is coupled to the netX chip across an SPI serial connection at a clock of 24Mhz by default and that is a bottle neck since all Ethernet Frames have pass this interface.

It is correct that netX chip itself could deal such a frame package rate, if the application would be inside netX or a different netX chip (netX100) would have been used that is supporting DMA transmissions with the host processor ... but not with netPI unfortunately.