[SciPy-User] Numpy 1.7.1 Crashing with MKL and AVX instructions

[Paul Blelloch]

Christoph Gohlke figured this out and has updated the MKL 64-bit builds of 
both numpy 1.7.1 and scipy 0.12.0 on his site.  

On Friday, May 24, 2013 8:24:37 AM UTC-7, Paul Blelloch wrote:
>
> I've tried posting this on the numpy list, but it keeps on getting 
> bounced, so I'll try here:
>  
> I found that when I went from numpy 1.7.0 to 1.7.1 I get a crash whenever 
> I try an eigenvalue calculation (or any other linalg calculation) on 
> matrices bigger than about 200x200.  This happens with both the latest 
> Anaconda and WinPython 64-bit Windows distributions (both of which use 
> numpy 1.7.1) and occurs on all the HP workstations at my company.  The 
> folks at Continuum helped me debug this and determined that the failure was 
> most likely in use of AVX instructions in MKL, but we haven't found a 
> workaround yet short of sticking to numpy 1.7.0.  The problem is apparently 
> specific to some combination of processor and OS.  Here's what I have:
>
>  
>
> OS Name Microsoft Windows 7 Professional
> Version 6.1.7601 Service Pack 1 Build 7601
> OS Manufacturer Microsoft Corporation
> System Name Z420-6
> System Manufacturer Hewlett-Packard
> System Model HP Z420 Workstation
> System Type x64-based PC
> Processor Intel(R) Xeon(R) CPU E5-1650 0 @ 3.20GHz, 3201 Mhz, 6 Core(s), 
> 12 Logical Processor(s)
> BIOS Version/Date Hewlett-Packard J61 v01.14, 7/17/2012
> SMBIOS Version 2.7
> Windows Directory C:\Windows
> System Directory C:\Windows\system32
> Boot Device \Device\HarddiskVolume1
> Locale United States
> Hardware Abstraction Layer Version = "6.1.7601.17514"
> Installed Physical Memory (RAM) 32.0 GB
> Total Physical Memory 31.9 GB
> Available Physical Memory 28.4 GB
> Total Virtual Memory 95.8 GB
> Available Virtual Memory 92.1 GB
> Page File Space 63.9 GB
> Page File C:\pagefile.sys
>
>  
>
> I'm surprised that I'm the only person out there running into this.  Is 
> there anyone else who's running into this problem with numpy 1.7.1 with MKL 
> on 64-bit Windows?
>
>  
>
> -Paul Blelloch
>
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