On 05/20/2012 10:17 AM, James Turner wrote: > This is interesting - as far as I know, the current GC does not > include a maximum delay and restart facility. If it did, that would > entirely satisfy the current issues. At least by my understanding. > > Equally, I've looked at the current GC code and didn't notice any > code to support this feature. Does anyone else have any further > information about this? Since it would be far simpler and more > robust than any other solution thus suggested.
I was lucky enough to notice this come by. I wouldn't hold your breath. :) This was an experiment, and honestly I have no idea why I put it in the docs. The idea was to do the GC normally, check timestamps periodically, and then longtmp() out of it past some threshold, leaving the intermediate sweep stuff in place. But that's not enough, because now you need to track all mutated reference-storing objects in a separate list so they can be swept again. And you need to have some kind of heuristic for when it's OK to restart the sweep. I have a vague memory of being sure I'd cleverly solved this, but I never got it working and at this point, frankly, I suspect I was wrong. In my advancing age, I've come to believe that low-latency GC is just a pipe dream. You can have a realtime GC or you can have a production system, but you can't have both at the same time. Every managed runtime in the modern world has latency bugs in some application or another, every one of them. Andy ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
