Meh damn you are right... There was something wrong with firefox ;). Since the Web Audio API im using seems to be broken on Firefox, it doesn't utilize much CPU because it seems to be stalled by some audio stuff. Weird. I will have a look into it and keep you updated with the performance when audio is active :).
On Fri, May 9, 2014 at 10:08 PM, Alon Zakai <[email protected]> wrote: > Ah, CPU emulator makes some sense if it has a bytecode VM or something else > with packed data. > > That performance sounds very surprising. Is it on a fully optimized build? > Do you see errors in the web console in firefox? It should warn if there is > a perf problem like asm.js not validating. > > - Alon > > > > On Fri, May 9, 2014 at 1:06 PM, Christoph Husse > <[email protected]> wrote: >> >> Well I am porting a CPU emulator and it seems to think unaligned >> memory accesses are really cool, or well at least the programs that >> run on this emulator :) >> >> BTW, The port works now and runs almost good on Chrome... Like 100% >> CPU utilization (one core). I think I can queeze out a bit more by >> skipping some frames and using webworkers for some stuff too to get a >> smooth experience. >> >> But on Mozilla Firefox this port stinks. Like its a slideshow. Really bad. >> >> On Fri, May 9, 2014 at 10:01 PM, Alon Zakai <[email protected]> wrote: >> > That hasn't been my experience, actually - when I've ported apps, they >> > tended to have just a small amount of unaligned accesses (e.g. in >> > network-reading code, serializing code, or GC code). Just rebuilding >> > after >> > fixing each one was fast enough. I'm surprised you have so many - what >> > is >> > their cause? Does your app purposefully pack structs to unaligned >> > offsets or >> > something like that? Generally speaking it isn't "easy" to cause an >> > unaligned access in C/C++. >> > >> > - Alon >> > >> > >> > >> > On Thu, May 8, 2014 at 11:06 PM, Christoph Husse >> > <[email protected]> wrote: >> >> >> >> But back to the general public... I think its an awesome idea to add >> >> this >> >> option you described. Because an application with misaligned accesses >> >> usually will not only contain one of them and it gets very tedious to >> >> figure >> >> them all out if SAFE_HEAP terminates your app on every occasion. Even >> >> further it might be possible to only report for each single line of >> >> SAFE_HEAP_LOAD etc ONCE per run, so that you don't get spammed with >> >> useless >> >> double reports. It's then easy to map the reported lines back to C++ >> >> sources >> >> with a debug info options as each SAFE_HEAP_LOAD will have the C++ code >> >> line >> >> as a comment behind it (could be done in a simple script for >> >> instance)... >> >> >> >> As far as I know there is no tool outside of emscripten which allows >> >> you >> >> to enumerate unaligned accesses. Valgrind had a feature request but it >> >> seems >> >> it landed on the GTFO TODO list for whatever reason... >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> >> Groups >> >> "emscripten-discuss" group. >> >> To unsubscribe from this group and stop receiving emails from it, send >> >> an >> >> email to [email protected]. >> >> >> >> For more options, visit https://groups.google.com/d/optout. >> > >> > >> > -- >> > You received this message because you are subscribed to a topic in the >> > Google Groups "emscripten-discuss" group. >> > To unsubscribe from this topic, visit >> > >> > https://groups.google.com/d/topic/emscripten-discuss/tOz2Yc_sLuA/unsubscribe. >> > To unsubscribe from this group and all its topics, send an email to >> > [email protected]. >> > For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "emscripten-discuss" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to a topic in the > Google Groups "emscripten-discuss" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/emscripten-discuss/tOz2Yc_sLuA/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
