From: "Ángel González" <keisial@gmail.com>
To: Anna Sidera <sidera.anna@ucy.ac.cy>
Cc: gcc-help@gcc.gnu.org
Subject: Re: how to use malloc to reserve space for 1 billion floats
Date: Tue, 28 Aug 2012 13:12:00 -0000 [thread overview]
Message-ID: <503CA892.1060903@gmail.com> (raw)
In-Reply-To: <f5c7a4293ffd9.503c6c12@ucy.ac.cy>
On 28/08/12 05:58, Anna Sidera wrote:
> The system has 10 giga byte RAM.
>
> The command:
> uname -a
> gives the following output:
> Linux olympus 2.6.26-2-amd64 #1 SMP Wed Aug 19 22:33:18 UTC 2009 x86_64 GNU/Linux
> I think this means that the system is 64 bit.
It does.
> So you think that the command:
> int myvariable = 1000;
> float *myarray = malloc(pow(myvariable,3)*sizeof(float));
> will work if pow(myvariable,3) is smaller than 2 billion?
>
> Many Thanks,
> Anna
Yes. (the 2+e9 limit being roughly for the 7,45GB needed, not due to
malloc, to which you
could ask for even bigger amounts )
prev parent reply other threads:[~2012-08-28 11:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-27 11:16 how to use malloc to reserve space for 1 million floats Anna Sidera
2012-08-27 16:15 ` Jonathan Wakely
2012-08-27 16:23 ` Ángel González
2012-08-28 11:18 ` how to use malloc to reserve space for 1 billion floats Anna Sidera
2012-08-28 13:12 ` Ángel González [this message]
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