[Target] 64-bit RPi4b target #6211
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The PR proposes having two targets A. Keep 2 targets until Raspbian 64bit OS is not in beta anymore and ships with Rpi4b |
merrymercy
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Aug 5, 2020
FrozenGene
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Aug 5, 2020
python/tvm/target/target.py
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| @@ -188,7 +188,8 @@ def arm_cpu(model='unknown', options=None): | |||
| "p20": ["-model=kirin970", "-mtriple=arm64-linux-android", "-mattr=+neon"], | |||
| "p20pro": ["-model=kirin970", "-mtriple=arm64-linux-android", "-mattr=+neon"], | |||
| "rasp3b": ["-model=bcm2837", "-mtriple=armv7l-linux-gnueabihf", "-mattr=+neon"], | |||
| "rasp4b": ["-model=bcm2711", "-mtriple=arm-linux-gnueabihf", "-mattr=+neon"], | |||
| "rasp4b": ["-model=bcm2711", "-mtriple=armv8l-linux-gnueabihf", "-mattr=+neon"], | |||
| "rasp4b64": ["-model=bcm2711", "-mtriple=aarch64-linux-gnu", "-mattr=+neon"], | |||
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I think we should add -mcpu=cortex-a72 for rasp4. We should get better performance after it than generic cpu instruction.
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thanks, I've added this additional field.
FrozenGene
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A 64-bit raspbian operating system is still not fully supported (in beta mode: https://www.raspberrypi.org/forums/viewtopic.php?t=275370), however, it's still possible to boot Ubuntu Server 64bit on the raspberry pi 4.
64bit code-generation should result in better performance overall, so it's recommended to boot a 64bit operating system on the pi by default.
I've also updated the 32bit target for better code-generation overall. Untuned results on Rpi4b below: