As pointed out I do think the creation and shutdown of the actor systems influence the results. I tried to run your code and after changing to one actor system my results are:
average 1 threads : 614 average 2 threads : 309 average 3 threads : 250 average 4 threads : 190 average 5 threads : 159 average 6 threads : 141 average 7 threads : 162 average 8 threads : 157 average 9 threads : 156 average 10 threads : 145 average 11 threads : 140 average 12 threads : 134 average 13 threads : 133 average 14 threads : 131 average 15 threads : 138 average 16 threads : 136 Compared to PiThreaded: average 1 threads : 495 average 2 threads : 263 average 3 threads : 179 average 4 threads : 146 average 5 threads : 137 average 6 threads : 128 average 7 threads : 122 average 8 threads : 122 average 9 threads : 122 average 10 threads : 123 average 11 threads : 122 average 12 threads : 123 average 13 threads : 123 average 14 threads : 122 average 15 threads : 124 average 16 threads : 125 Cheers, Patrik On Tue, Jan 7, 2014 at 1:32 PM, Rüdiger Möller <[email protected]> wrote: > > > Am Dienstag, 7. Januar 2014 11:57:54 UTC+1 schrieb √: > >> You definitely want to play around with the configuration and make sure >> that you are benchmarking correctly: https://stackoverflow.com/questions/ >> 504103/how-do-i-write-a-correct-micro-benchmark-in-java >> >> > I know the details regarding VM warmup and how to avoid in-place JIT'ing. > I am iterating the bench 30 times, only take the average times of last 10 > iterations (20 iterations warmup), see mainloop i added to the original > AKKA sample. Also the benchmark is not in the nanos, but several hundred > millis per iteration. > > >> dispatcher throughput, thread pool type and thread pool size, and mailbox >> type. >> > > can you be more specific pls (Code!). The use case is many short running > computations with contention created when aggregating the result. > > >> >> Also, Opterons have pretty bad cache performance for inter-core comms >> (Intel uses inclusive L3s for faster on-package caches) >> >> > Well the other benches use the same hardware. > I am currently repeating the test on a dual socket x 6 core intel xeon (so > 12 cores, 24Hardware-Threads). With Akka still being worst one by far. > > >> Cheers, >> √ >> >> >> On Tue, Jan 7, 2014 at 11:49 AM, Endre Varga <[email protected]>wrote: >> >>> Hi Rüdiger, >>> >>> Have you tried to play around with the throughput setting of the >>> dispatcher? For these kind of non-interactive jobs fairness is not an >>> issue, so you might most likely want to increase that value. >>> >>> -Endre >>> >>> >>> On Tue, Jan 7, 2014 at 1:26 AM, Rüdiger Möller <[email protected]>wrote: >>> >>>> Please checkout chart here. >>>> >>>> https://plus.google.com/109956740682506252532/posts/1hKcYyPuJzh >>>> >>>> [cut&pasted from g+]: >>>> Hey folks, i am currently writing a blog benchmarking akka vs >>>> traditional threading. I use the example provided by the akka java tutorial >>>> computing Pi. In order to compare the abillity to paralellize big amounts >>>> of tiny jobs, i use Pi-computaional slices of 100,000 jobs with iteration >>>> of 1000. >>>> Hardware is dual socket AMD opteron with each 8 real cores and 8 >>>> 'virtual' (because the test uses floating point i just scale to 16 threads >>>> instead of 32). >>>> >>>> As you can see in the chart AKKA (2.03) performs very bad compared to >>>> threads and a homebrew actor lib. >>>> >>>> source of akka bench is here: https://gist.github.com/ >>>> RuedigerMoeller/8272966 >>>> (added outer loop to original typesafe sample) >>>> >>>> Is there anything I miss or is this 'normal' Akka performance ? >>>> >>>> Threading-style code is here: https://gist.github.com/ >>>> RuedigerMoeller/8273307 >>>> >>>> I tried 2.1 with even worse results. >>>> >>>> http://imgur.com/TAt9XOf >>>> >>>> -- >>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>> >>>>>>>>>> Check the FAQ: http://akka.io/faq/ >>>> >>>>>>>>>> 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 [email protected]. >>>> To post to this group, send email to [email protected]. >>>> >>>> Visit this group at http://groups.google.com/group/akka-user. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> -- >>> >>>>>>>>>> Read the docs: http://akka.io/docs/ >>> >>>>>>>>>> Check the FAQ: http://akka.io/faq/ >>> >>>>>>>>>> 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 [email protected]. >>> To post to this group, send email to [email protected]. >>> >>> Visit this group at http://groups.google.com/group/akka-user. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> >> >> -- >> Cheers, >> √ >> >> * Viktor Klang* >> *Director of Engineering* >> Typesafe <http://www.typesafe.com/> >> >> Twitter: @viktorklang >> > -- > >>>>>>>>>> Read the docs: http://akka.io/docs/ > >>>>>>>>>> Check the FAQ: http://akka.io/faq/ > >>>>>>>>>> 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/akka-user. > For more options, visit https://groups.google.com/groups/opt_out. > -- Patrik Nordwall Typesafe <http://typesafe.com/> - Reactive apps on the JVM Twitter: @patriknw -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: http://akka.io/faq/ >>>>>>>>>> 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. 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