Andreas, Kazu, Johan That is a truly monumental sequence of patches! Thank you all for working so hard on making GHC better. Better together! Onward and upward. Simon From: ghc-devs-bounces@haskell.org [mailto:ghc-devs-bounces@haskell.org] On Behalf Of Johan Tibell Sent: 12 February 2013 07:03 To: ghc-devs@haskell.org Cc: Kazu Yamamoto (山本和彦); Andreas Voellmy Subject: Heads-up: new parallel I/O manager merged Hi, I've merged the new parallel I/O manager that Andreas Voellmy and Kazu Yamamoto have been working on. The new parallel I/O manager scales much better than the current one*: the number of requests per second scales almost linearly up to 32 cores I believe. Perhaps Andreas could post the numbers. If you see any bugs that you think are related to the new I/O manager, please let Andreas and Kazu know. * The current one (which replaced an even earlier one) scaled well in the number of open file descriptors and performed better than the I/O manager it replaced, but it didn't scale well to multiple cores. Cheers, Johan