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Altera_Forum
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12 years ago

Triple speed ethernet performance

Hello, is somewhere some application note like was AN440, where they were tested some types of ethernet applications and table with benchmark test results (in attachment AN440) ? I use DP8384...
Altera_Forum's avatar
Altera_Forum
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12 years ago

No it's not that simple. The CPU doesn't output the frames itself word by word. It uses a DMA. The packet emission part is actually quite fast (a DMA can usually read one word per cycle, so with the SGDMA clocked at 120MHz on a 32-bit bus, that would be a bit more than 3.8Gbits/s, if the memory can follow). What takes time is all the software processing by the IP stack, is much more difficult to estimate, and is very OS and (software) configuration dependant.