Arm Announces Cortex-R82: First 64-Bit Real Time Processor

Re:Arm Announces Cortex-R82: First 64-Bit Real Time Processor by rurban on Tuesday September 08, 2020 @02:31AM (#24405728)

Why do you need more than 2GB in real-time? In real-time the less the better. 64bit puts a huge burden on everything, the MMU also. Now people will start using operating systems which are not built for RT, like Linux, and wonder why the cycles start failing and the system constantly reboots. Driver availiability of course which drives down HW costs, but best use an extremely limited IO and only one fast IO to meet your cycle goals.

I see that it's better than a custom FPGA, but a normal 32bit rt cpu with half the memory pressure and pointer size looks much better to me.

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Re:Arm Announces Cortex-R82: First 64-Bit Real Time Processor by ChuckMcM on Tuesday September 08, 2020 @02:33PM (#24411380)

I take it you haven't processed SAR data :-). In the Zynq Ultrascale series you can have DDR hanging off the fabric that is accessible through the AMBA bus to the processor. Having multiple cores doing overlapping convolutions on spectral data in RAM can run fast enough to give real time tracking latencies.

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