Ted Huntington wrote: > I would be interested in hearing more details about: > +added Gigabit Ethernet driver for Realtek 8169 > > That is great news! Is RTNET now capable of reading/writing 1 bit every > nanosecond? That is awesome. Was the chip tested on a PCI card? This > really opens the door for making PC oscilloscopes and logic analyzers, > because gigabit in real-time could, in theory, read 4 8-bit analog > signals (or 32 digital I/O lines) in 32ns, or 31MHz, well within the > speeds needed for most electronics applications. The most complicated > part would be, in my novice opinion, making the embedded/non-PC chip > side MAC/PHY, for which a person would have to make a PCB. A person > would have to use the PCI address/data lines on the RTL8169 chip as data > inputs, and so would need to configure all the PCI control signals, I'm > not sure how that is done. >
The actual performance especially of Gigabit Ethernet depends on the power and real-time characteristics of your target system. We have no Gigabit Ethernet in use here so far, so I cannot provide you any practical experiences. But I know that there are some users out there having evaluated some systems or are currently on the way to do so. Maybe someone else can help here... Just one remark: don't expect to gain the theoretical performance 1000 MBit/s promises. It will be less, also due to hard-RT guarantees. Jan
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