what's the point of rpython?
rridge at csclub.uwaterloo.ca
Tue Jan 20 23:22:07 CET 2009
Paul Rubin <http://phr.cx@NOSPAM.invalid> wrote:
>Those links describe using the LOCK prefix, which as the name implies,
>asserts a lock, so it is no longer "lockless reference counting".
No, it doesn't assert a lock in the sense used in this thread. On modern
Intel systems it's normally handled completely within the cache.
>The LOCK prefix adds about 100 cycles to the instruction.
That's unavoidable. It's still faster than spin lock, which would also
have to use syncronizing instructions.
l/ // Ross Ridge -- The Great HTMU
[oo][oo] rridge at csclub.uwaterloo.ca
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