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ikwzm / udmabuf

User space mappable dma buffer device driver for Linux.

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Optimization flags

conradholt opened this issue · comments

commented

I'm using petalinux on a zynq ultrascale+ (aarch64-linux-gnu-gcc)

I have a dummy script initializing udma/dma and a custom fft accelerator, and sending data to the devices.
Without optimization flags everything works fine.
However as soon as I optimize for "-O1" sometimes it will finish executing the script and some others it will stall.
And over "-O2" It will never finish executing.

Has anyone experienced something similar, Is there something that optimization flags could be doing to cause this behavior?