I just managed to kill the driver for my network card with an out-of-bounds write in my GPU code!? Security of those GPUs must be awesome..
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Sorry I don't know about AMD, need to look it up, I think DMAR might be Intel's name
Yep. Was disabled in BIOS. What a reasonable default! Grrr. Now that its enabled this should drastically improve my GPU hacking productivitypic.twitter.com/QdWWln9qHk
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And afaict from a quick test the performance of my GPU kernels is unchanged. Thank you so much, this was very helpful!
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Did enabling IOMMU prevent system crashes from the same GPU kernels that caused crashes before? (So far you only tweeted that it "should".)
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Bikeshedding: Is this output from grep? I don't seem to remember a ".." between matches on my grep.
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dmesg | grep -C2 IOMMU
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