Hi Roland,
> On Feb 24, 2015, at 5:23 AM, Roland Kuhn <goo...@rkuhn.info> wrote: > > Hi Reid, > > currently I don’t have the bandwidth to fully understand what you are doing, I appreciate any response at all. Thank you! > but the numbers you quote here sound suspiciously like the “ping–pong > problem”: if your thread pool is too big and messages always hop threads even > if they should not, then you will incur the full CPU wake-up latency (which > is of the order of 100µs) for each and every message send. Okay, that seems plausible and it gives me a new area of inquiry to investigate. > The ping–pong benchmark (with one ping and one pong each) gets roughly 1000x > faster by using only one thread for the two actors—and the reason is that > these two actors cannot be active concurrently anyway. I will try configuring my executor with a single thread and see if that makes it fly. > > Another thing I notice: 10,000 repetitions is by far not enough to benchmark > anything on the JVM. Proper inlining and optimizations require a lot more > than that. That’s good to know. I can certainly try this with a million or more. > The other question is how much overhead your way of tracing introduces, > because generating a log message per Actor message send will obviously double > the message-sending overhead. Also a good point. I’ll repeat my experiments without that overhead. > > Regards, > > Roland -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
