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Is it possible to predict of SuperH performance per Watt compared to Risc-V or ARM? It seems to be a great candidate for IoT CPUs.
by antattack 5y ago
Is it possible to predict of SuperH performance per Watt compared to Risc-V or ARM?
It seems to be a great candidate for IoT CPUs.
- pjscott 5y agoSuperH and RISC-V and ARM are instruction sets, not microprocessors. The performance per Watt depends on the specific microprocessor architecture, the physical manufacturing technology, etc., much more than the instruction set.
- antattack 5y agoThanks. I assumed that ISA influences architecture more because there are ARM IoT processors but not X86.
- klelatti 5y agoI think that it's actually not an unreasonable question and the prior answer was a little short! For example ARM has different ISAs depending on the application: A for more complex Application processors, R for Realtime and M for Microcontroller. The ISA for M is less complex, less complex to implement and likely to use less power than A (or than a full x86 implementation). Not an expert but from what I've seen Super-H seems like a good candidate for a low power applications.
- freemint 5y agoThere definitely is an influence but the margin of ISA on power consumption are much smaller than what differentiation inside an ISA using engineering allows for. An ULTRASPARC with a huger register window is never going to be powesaving compared to an Atom but an i9 thread can eat more than an ULTRASPARC II as Intel is currently keen on showing.
- userbinator 5y agobecause there are ARM IoT processors but not X86. Intel did try... https://en.wikipedia.org/wiki/Intel_Quark https://en.wikipedia.org/wiki/Intel_Quark
- freemint 5y agoSince no J-Core chip, as far as i am aware, was produced on an recent node, so comparisons would need to be based on simulations. If you were to talk with a specific foundry and shell out the money to get access to proprietary simulators and other proprietary information you could get some simulated number. I am not aware of any such numbers. I heard "decade on a button cell at chip inside free toy inside kids magazine cost" in a presentation once and that probably refers to a 180 nm process but this is hardly a concrete number.
- deleted 5y ago[deleted]