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Postings from February 2001
Hong Zhang wrote: > The memory barriers are always needed on SMP, whatever algorithm > we are using. I was just pointing out that barriers are an alternative to mutexes. Ref count certainly would use mutexes instead of barriers. > The memory barrier can be easily coded in assembly, or intrinsic > function, such as __MB() on Alpha. Perl ain't Java! We have to worry about XS code written in plain old scary C. If we see some really amazing performance improvements then I could imagine going with barriers, but I'm doubtful about their portability and fragility. Hmm. I just remembered the other GC technique that is very fragile: ref counts. Maybe fragility isn't a problem after all. ;) - KenThread Previous | Thread Next