Re: Isn't STM good at building an ant colony?
If you have a fixed cell topology, you can also find a coloring of the graph and use it for contention-free scheduling. With a regular grid, you can use the obvious 2-coloring (a checkerboard pattern), so you would handle all the white squares in phase 1 and all the black squares in phase 2. -Per On Tue, Sep 21, 2010 at 9:00 PM, Hozumi fat...@googlemail.com wrote: Hi Nicolas, That is a nice idea! Thanks. -- Takahiro Hozumi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Isn't STM good at building an ant colony?
Hi Nicolas, That is a nice idea! Thanks. -- Takahiro Hozumi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Isn't STM good at building an ant colony?
If you have a fixed geometry of cells, it is quite easy to have one ref per cell. Which reduce a lot of contention. For example, on a grid where ant can go instead of representing the world as a ref to a matrix, you can represent the world as a matrix of refs. Those refs can then be update concurrently. Provided there are a lot of cells and not too much contention, iti should work well. On Sun, Sep 19, 2010 at 11:01 PM, Hozumi fat...@googlemail.com wrote: Hi. I posted following question. The more threads that changes the Clojure's ref are, the more does the rate of retries per threads rise? http://stackoverflow.com/questions/3746893/the-more-threads-that-changes-the-clojures-ref-are-the-more-does-the-rate-of-re I think increasing retries in O(thread^2) means that refs should not be used to store the data that is aletered by too many threads like big ant colony map or newral network nodes. If modifying the data by too many threads is planned, instead of refs, are agents best way to store it? Any other solution? Thanks. Takahiro Hozumi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- Sent from an IBM Model M, 15 August 1989. -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Isn't STM good at building an ant colony?
Hi. I posted following question. The more threads that changes the Clojure's ref are, the more does the rate of retries per threads rise? http://stackoverflow.com/questions/3746893/the-more-threads-that-changes-the-clojures-ref-are-the-more-does-the-rate-of-re I think increasing retries in O(thread^2) means that refs should not be used to store the data that is aletered by too many threads like big ant colony map or newral network nodes. If modifying the data by too many threads is planned, instead of refs, are agents best way to store it? Any other solution? Thanks. Takahiro Hozumi -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
