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by Gibbon1
3948 days ago
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Over my pay grade, which is why I'm slopping away at ARM Cortex firmware instead of at Azul. I'd ask my friend but he's on vacation. I do know Azul originally ran their JVM on custom processors. (Target market high speed trading systems, etc) I can't see why they would have done that unless older 0x86 etc processors just couldn't do what they needed. A little internet searching, leads to this and some other stuff.
https://www.artima.com/lejava/articles/azul_pauseless_gc.htm... I think the deal is, if the GC moves something, it can leave a bunch of dangling pointers. Those need to be fixed up to point to the new place before they get dereferenced. Except Azul uses a read barrier to trap when a dangling pointer is dereferenced, so the fix up can be lazy. |
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