The biggest issue with these sort of chips (this design is known as the Intel Xeon Phi) is memory. 50+ cores sharing the same memory bus means that cache miss penalties go through the roof. And unless these chips are optimized for efficient CAS operations that can be a issue as well. See for instance the CUDA recommendations on CAS: "it works, it's there, don't use it if you value performance".
So I doubt simply plopping a JVM on this thing and booting Clojure will be that impressive. Manycore introduces a whole new set of problems. Timothy On Sat, Apr 27, 2013 at 9:23 PM, Yves S. Garret <yoursurrogate...@gmail.com>wrote: > I'll take a blind stab at this and say that Erlang might actually do > more poorly, unless the chip's interchip message passing is taken > advantage of by Erlang. If there's a separate piece of hardware > taking on the role of being the messenger, having to waste computer > cycles to send a message isn't terribly efficient. > > > On Sat, Apr 27, 2013 at 11:17 PM, Cedric Greevey <cgree...@gmail.com>wrote: > >> On Sat, Apr 27, 2013 at 11:13 PM, Yves S. Garret < >> yoursurrogate...@gmail.com> wrote: >> >>> How would this compare to Erlang? >>> >>> >>> On Sat, Apr 27, 2013 at 10:51 PM, Cedric Greevey <cgree...@gmail.com>wrote: >>> >>>> https://en.wikipedia.org/wiki/Intel_MIC >>>> >>>> 50+ cores?! Clojure will leave every other language in the dust on >>>> something like that, thanks to its inherently scaleable concurrency >>>> constructs. Try writing a 50-threaded Java application without getting >>>> deadlocks all over the place, or cheating and using very coarse-grained >>>> locks (have fun with the task manager showing 2% CPU utilization when your >>>> app is running full-bore!). >>>> >>>> If big, 32-bit addressing spaces were what made automatic memory >>>> management really begin to come into its own (and with it, Java), then it's >>>> doubtless 50-core machines that will make automatic concurrency management >>>> really begin to come into its own. >>>> >>> >> Erlang might also do well on such a machine. The actor model likely >> involves more communication among the cores to get full utilization, but >> then, the page describes some sort of message-passing system among the >> cores on MIC, so ... >> >> -- >> -- >> 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 unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > -- > -- > 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 unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth) -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
