#10508: Update ATLAS to version 3.9.x
--------------------------------+-------------------------------------------
Reporter: vbraun | Owner: tbd
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-5.1
Component: packages | Resolution:
Keywords: ATLAS | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Volker Braun | Merged in:
Dependencies: | Stopgaps:
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Description changed by vbraun:
Old description:
> Update to the developer release atlas-3.9.x according to advice of Clint
> Whaley. The new atlas release now builds netlib lapack itself, so the
> lapack tarball is now included in `/patches`. The lapack spkg is no
> longer needed and will be removed.
>
> I rewrote the ATLAS spkg-install (see also #10226) to
> * python only without relying on other script languages
> * allow customization of architectural defaults via the new
> `SAGE_ATLAS_ARCH` environment variable.
> * still build a reasonable library if the automatic tuning process
> fails to find accurate timings.
> * `SAGE_ATLAS_LIB=path` now searches in `path/libatlas.so` instead of
> `path/lib/libatlas.so` so it works for people with atlas in `/lib64`,
> too.
> * Threading is now enabled by default. Whats the point of trying to
> squeeze more performance out of modern processors if you run on one core
> only?
>
> By default, ATLAS will now try twice to get timings, if that fails build
> with `SAGE_ATLAS_ARCH=fast`, and if that fails with
> `SAGE_ATLAS_ARCH=base`.
>
> From the new `SPKG.txt`:
> {{{
> The package can be configured via two environment variables:
>
> * SAGE_ATLAS_LIB=path
> If this environment variable is set, path/libatlas.so is used
> and ATLAS is not compiled.
>
> * SAGE_ATLAS_ARCH=arch[,isaext1][,isaext2]...[,isaextN]
> The given architectural default and instruction set extensions are
> used instead of the empirical tuning. Available architectures are
>
> POWER3, POWER4, POWER5, PPCG4, PPCG5, POWER6, POWER7, P5, P5MMX,
> PPRO, PII, PIII, PM, CoreSolo, CoreDuo, Core2Solo, Core2, Corei7,
> P4, P4E, Efficeon, K7, HAMMER, AMD64K10h, UNKNOWNx86, IA64Itan,
> IA64Itan2, USI, USII, USIII, USIV, UST2, UnknownUS, MIPSR1xK,
> MIPSICE9
>
> and instruction set extensions are
>
> VSX, AltiVec, SSE3, SSE2, SSE1, 3DNow
>
> In addition, you can also set
>
> - SAGE_ATLAS_ARCH=fast picks defaults for a modern (2-3 year old)
> CPU of your processor line, and
>
> - SAGE_ATLAS_ARCH=base picks defaults that should work for a ~10
> year old CPU.
>
> For example,
>
> SAGE_ATLAS_ARCH=Corei7,SSE3,SSE2,SSE1
>
> would be appropriate for a Core i7 CPU.
> }}}
>
> The current spkg version is at
>
> http://www.stp.dias.ie/~vbraun/Sage/spkg/atlas-3.9.32.spkg
New description:
Update to the developer release atlas-3.9.x according to advice of Clint
Whaley. The new atlas release now builds netlib lapack itself, so the
lapack tarball is now included in `/patches`. The lapack spkg is no longer
needed and will be removed.
* Updated to newest upstream source, various patches are no longer
required
* `SAGE_ATLAS_LIB=path` now searches in `path/libatlas.so` instead of
`path/lib/libatlas.so` so it works for people with atlas in `/lib64`, too.
* Threading is now enabled by default
* Flush before `os.system` (#13210)
By default, ATLAS will now try twice to get timings and fail immediately
if throttling is enabled. If auto-tuning fails build with
`SAGE_ATLAS_ARCH=fast`, and if that fails with `SAGE_ATLAS_ARCH=base`. On
x86, the fast and base targets are the new ATLAS generic targets x86SSE3
and x86SSE2/x86x87.
The current spkg version is at
http://www.stp.dias.ie/~vbraun/Sage/spkg/atlas-3.9.84.spkg
TODO:
* Setting the Fortran compiler to `sage_fortran` doesn't work currently,
see
https://sourceforge.net/tracker/?func=detail&atid=379483&aid=3541376&group_id=23725.
But as long as you are using gfortran the current spkg works.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10508#comment:36>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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