I've been reading a little about GC latency and have run
across statements like this:
One solution to the GC synchronisation problem would be to
implement a concurrent garbage collector. Typically,
however, concurrent GC adds some overhead to the mutator,
since it must synchronise with the collector.some thunks are
never “black-holed”, so giving a potential performance win.
Unfortunately, in the parallel setting, it substantially
enlarges the time window in which two or more duplicate
threads might evaluate the same think, and thus
-- Comparing and Optimising Parallel Haskell Implementations
for Multicore Machines
What is the mutator?
--
Jason Dusek
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