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.
