[phenixbb] phenixbb Digest, Vol 79, Issue 4

[Francois Berenger]

On 06/14/2012 04:23 PM, Kay Diederichs wrote:
> "A 64bit operating system" can only run on hardware that supports
> 64bits. Here, 64bits refers to addresses in memory - arrays larger than
> 4GB need 64bit addressing because 32bits do not allow high enough
> numbers to index such arrays.
>
> It has nothing to do with the maximum value of an integer - that is set
> by the programmer.
> A programmer can (depending on programming language and compiler)
> usually decide whether integer numbers should be of size 4 bytes or 8
> bytes. It is just by coincidence that 8 bytes are 64 bits.

It is not by coincidence that programming languages partially
reflect the hardware they are running on.
This is for performance reasons.

> Here it seems to me that a 8byte integer would be needed to hold the
> number of cubicles.
>
> best,
>
> Kay
>
>> Date: Mon, 11 Jun 2012 11:44:07 -0700
>> From: Nathaniel Echols<nechols at lbl.gov>
>> To: PHENIX user mailing list<phenixbb at phenix-online.org>
>> Subject: Re: [phenixbb] runtime error in phenix.refine
>> Message-ID:
>> <CALeAa1PBCCzKPJTMoDsFbsZMSO=SMB_19ns+mfvC3HozuUcBaQ at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> On Sun, Jun 10, 2012 at 10:04 AM, Eugene
>> Valkov<eugene.valkov at gmail.com> wrote:
>>> I'm encountering the following during the second macro-cycle in
>>> phenix.refine in latest 1.8-1069 dev build for Linux 64-bit:
>>>
>>> RuntimeError: Excessive number of cubicles:
>>> ?This may be due to unreasonable parameters:
>>> ? ?cubicle_edge=5
>>> ? ?space_span=(8467.78,8440.85,8372.67)
>>> ? ?n_cubicles=(1694,1689,1675)
>>> ? ?max_number_of_bytes=101542821888
>>>
>>> Any thoughts/suggestions much appreciated.
>>
>> If I'm interpreting the code correctly, this means that the number of
>> cubicles will lead to an integer format overflow - which I find hard
>> to believe if you're using a 64-bit system. Could you please send me
>> the rest of the error message, along with the output of the command
>> "boost_adaptbx.show_platform_info"?
>>
>> thanks,
>> Nat
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