Michael Abshoff's Wiki SAGE page

Hello, I study math at the University of Dortmund. Most of the time I spend with SAGE is dedicated around packages and their portability. I added valgrind support to Sage 2.8.3 and have been using various valgrind tools to investigate Sage's memory consumption.

I am the main release manager for Sage and I chaired a number of releases - 29 so far:

• 2.8.11, 2.8.13-2.8.15
• 2.9, 2.9.2-3
• 2.10, 2.10.1-3, 2.10.4 (together with Robert Miller)
• 2.11
• 3.0, 3.0.1-6
• 3.1, 3.1.1-4
• 3.2, 3.2.1-3

Sage Projects

High Level

• Probably chairing the current Sage release

• Solaris port of Sage

• FreeBSD port of Sage

• MSVC port of Sage

• Cygwin re-port of Sage

• 64 bit OSX port of Sage

• hunt mem-leaks in C/C++ code of Sage

• DebianSAGE

• whatever else currently needs fixing

• My open trac tickets (the idea was shamelessly stolen from Martin Albrecht)

Low Level: Build System Improvements

A list of things on my ToDo list related to the build system. As things mature they will be moved to their own SEP:

• compiler classes, i.e. gcc, icc, sun cc, MSVC
• the construct 'export MAKE="make -j10"' is bad, we need something like SAGE_BUILD_THREADS and SAGE_MAKE and use those
• Sage on 64 bit OSX 10.5 and higher, Solaris, FreeBSD
• gcc 4.4 snapshots or whatever else is coming up
• OSX 10.6 coming up
• Cygwin support coming back

• Fortran infrastructure rework - i.e. support for g77, g95, gfortran and the SiCortex Fortran compiler

• SAGE_DEBUG mode - i.e. '-O0 -g' - but this also needs to work with SAGE64
• Custom CFLAGS, CXXFLAGS
• Custom CC, CXX, FORTRAN compilers, i.e. 'CC == gcc-4.2'
• Tier 1 vs. Tier 2 support: Tier 1 - builds and passes doctests vs. Tier 2: builds, but can fail some doctests. For Tier 2 only some configs might even build
• SAGE_BUILD_TMPDIR:
  • use it instead of spkg/build - this could be scratch space or a tmpfs disk
  • write a script that does du -sch before deleting the spkg dir in build and then logs the amount of data, then we can use some common table in the sage_scripts repo to check for available space before building an spkg
• spkg cleanup: split rpy.spkg from r.spkg, move the boost headers to its own spkg from polybori.spkg.
• tmpfs like solutions for temp build dir:
  • Solaris - tmp is automatically mounted as tmpfs

  • Linux - tmpfs - http://en.wikipedia.org/wiki/TMPFS: "Usage of tmpfs for example is "mount -t tmpfs -o size=1G,nr_inodes=10k,mode=0700 tmpfs /space" which will allow up to 1 GiB in RAM/swap with 10240 inodes and only accessible by the owner of the directory /space. The filesystem's maximum size can also be changed on-the-fly, like "mount -o remount,size=2G /space"."

  • OSX: http://lists.apple.com/archives/darwin-kernel/2004/Sep/msg00004.html

Done Tasks

• My closed trac tickets (the idea was shamelessly stolen from Martin Albrecht)

• See the Changelog, the google groups sage-devel and sage-support and #sage-devel on freenode.
• DMG installation image for MacOSX [other people did most of the work here]
• make all packages using BLAS/Lapack use the Accelerate Framework on MacOSX. Patch for Linbox exists and will hopefully show up in Linbox svn soon

Other Software Interests

• Linbox with MSVC
• Porting mathematical open source code to Solaris, Windows and any odd Unix out there.

Places where I can be found

• google groups sage-devel, sage-support, linbox-devel, group linbox-use

• the ApCoCoA & CoCoA forum

• #sage-devel on freenode

• CategoryHomepage