[Numpy-discussion] Numpy Segmentation Fault

Yogesh Tomar ytomar@gmail....
Fri Apr 9 08:53:08 CDT 2010


Yes I built it myself, some time back. I am using version 3.8.3

Regards,
Yogesh Tomar


On Fri, Apr 9, 2010 at 7:14 PM, Charles R Harris
<charlesr.harris@gmail.com>wrote:

>
>
> On Fri, Apr 9, 2010 at 3:33 AM, Yogesh Tomar <ytomar@gmail.com> wrote:
>
>> Hi David,
>>
>> Many thanks for pointing this out, it turns out that it is indeed an ATLAS
>> issues and now I am able to run the test without any seg fault, after
>> re-installing numpy without ATLAS
>>
>> A small question, if I use numpy without ATLAS will there be any functions
>> that will not be available?
>> Is there any major performance hit that I need to be aware of?
>>
>>
> The performance hit is likely to come with large arrays. For small arrays
> the call overhead will dominate and most of the data will reside in cache
> anyway. It is large arrays where the cache awareness of ATLAS makes a
> difference in performance and the difference can be a substantial. Where did
> you get ATLAS from? Did you build it yourself?
>
> <snip>
>
> Chuck
>
>
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