#10508: Update ATLAS to version 3.9.32
---------------------------+------------------------------------------------
Reporter: vbraun | Owner: tbd
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.6.2
Component: packages | Keywords: ATLAS
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Update to the developer release atlas-3.9.32 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
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10508>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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