Perhaps we can put up this code on MPIR's Travis CI and see how it goes on OSX available there.
Dima On Tue, Jan 15, 2019 at 7:30 PM 'Bill Hart' via mpir-devel <mpir-devel@googlegroups.com> wrote: > > One difference is in how jump tables are implemented. But I really don't see > how that would be related to this issue. > > Are you sure you are not just running out of memory under OSX? Or perhaps OSX > is just pushing stuff out to disk earlier than Linux? > > Bill. > > On Tue, 15 Jan 2019 at 20:07, Ronald Mak/SJSU <ron....@sjsu.edu> wrote: >> >> Hi, Bill. >> >> >> >> This will take some detective work to see what are the differences, if any, >> between how MPIR is built on macOS and Linux. It could be a configuration >> issue. Maybe I’ll get a student to look into this. >> >> >> >> – Ron >> http://www.cs.sjsu.edu/~mak/ >> >> >> >> “On two occasions I have been asked, 'Pray, Mr. Babbage, if you put into the >> machine wrong figures, will the right answers come out?' I am not able >> rightly to apprehend the kind of confusion of ideas that could provoke such >> a question.” >> -- Charles Babbage, 1791-1871, world’s first computer scientist >> >> >> >> >> >> From: 'Bill Hart' via mpir-devel <mpir-devel@googlegroups.com> >> Reply-To: <mpir-devel@googlegroups.com> >> Date: Tuesday, January 15, 2019 at 2:16 AM >> To: mpir-devel <mpir-devel@googlegroups.com> >> Subject: Re: [mpir-devel] Re: MPIR slow on macOS? >> >> >> >> That looks correct. >> >> >> >> So your idea that it might be swapping sounds pretty likely. >> >> >> >> I did find someone else reporting a slowdown the other day, and it turned >> out their program was linked to a very old GMP instead of the MPIR they >> built. >> >> >> >> I'm not a Mac expert, so I don't know how to check this, but I imagine you >> can find out online somewhere. >> >> >> >> Otherwise, I can't think of anything which would cause this to happen. >> >> >> >> Bill. >> >> >> >> >> >> On Tue, 15 Jan 2019 at 05:19, Ronald Mak/SJSU <ron....@sjsu.edu> wrote: >> >> Hi, Bill. >> >> >> >> On my Mac laptop: >> >> >> >> ~/mpir-3.0.0: ./config.guess >> >> ivybridge-apple-darwin18.2.0 >> >> This is accurate, as far as I can tell. >> >> I’ve attached my pi program, which I assign to my C++ classes to give my >> students practice downloading, configuring, building, and deploying a >> software library. >> >> >> >> – Ron >> http://www.cs.sjsu.edu/~mak/ >> >> >> >> >> >> From: 'Bill Hart' via mpir-devel <mpir-devel@googlegroups.com> >> Reply-To: <mpir-devel@googlegroups.com> >> Date: Monday, January 14, 2019 at 8:11 PM >> To: mpir-devel <mpir-devel@googlegroups.com> >> Subject: [mpir-devel] Re: MPIR slow on macOS? >> >> >> >> What does ./config.guess say your machine is? It's probably just too new to >> be detected correctly. >> >> >> >> Bill. >> >> On Tuesday, 15 January 2019 05:05:06 UTC+1, Ronald Mak wrote: >> >> I wrote a C++ program that uses MPIR 3.0.0 to compute the first million >> digits of pi. On a native Linux laptop with a Core i7 1.8 GHz CPU, my pi >> program executed in under 8 seconds. >> >> I installed MPIR 3.0.0 on my MacBook Pro laptop with a Core i7 2.3 GHz CPU >> and macOS Mojave 10.14.2. The same pi program took over 135 seconds to >> execute. >> >> Then I used VirtualBox to install Ubuntu 18.10 in a virtual machine on my >> MacBook Pro laptop. I installed MPIR 3.0.0 on the Ubuntu VM, and the same pi >> program ran in about 7 seconds. >> >> What is going on with MPIR on macOS to cause my pi program to run so much >> more slowly? It's apparently not a hardware issue, since the latter two runs >> of my pi program were on the same laptop, but on different operating >> systems. Does MPIR cause macOS to generate interrupts? Interpret certain >> instructions? Paging? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "mpir-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to mpir-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to mpir-devel@googlegroups.com. >> Visit this group at https://groups.google.com/group/mpir-devel. >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "mpir-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to mpir-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to mpir-devel@googlegroups.com. >> Visit this group at https://groups.google.com/group/mpir-devel. >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "mpir-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to mpir-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to mpir-devel@googlegroups.com. >> Visit this group at https://groups.google.com/group/mpir-devel. >> For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "mpir-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to mpir-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to mpir-devel@googlegroups.com. >> Visit this group at https://groups.google.com/group/mpir-devel. >> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "mpir-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to mpir-devel+unsubscr...@googlegroups.com. > To post to this group, send email to mpir-devel@googlegroups.com. > Visit this group at https://groups.google.com/group/mpir-devel. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to mpir-devel+unsubscr...@googlegroups.com. To post to this group, send email to mpir-devel@googlegroups.com. Visit this group at https://groups.google.com/group/mpir-devel. For more options, visit https://groups.google.com/d/optout.
