|SNAP: Shared Nothing Arc Processes the VM discussion|
|8 points by almkglor 4151 days ago | 52 comments|
|As requested by shader, move all your discussions about the new shared-nothing VM by almkglor, who hasn't even bothered to show a single bit of code.|
Problems to discuss:
1. Message passing and memory management. Copy always or share-and-copy-on-write? Or something even weirder?
2. Global variables. Yes, you can treat global variables as "just another process"... but then you get the overhead of receiving a new "message" each time you read a global variable. Which is, conceptually, a copy, and might need to be done in that way in the VM at some point. Me, I say have each process maintain a "cache" of global variables, and if the process mutates a structure in a global variable (but not if it mutates the global variable itself), then the behavior is just undefined: maybe when the process reads the global variable again, it will get the mutated version, maybe not, maybe the computer will suddenly burn, maybe not... if the process mutates the global variable itself, it will lock out the other processes while changing the global variable.