On Thu, Nov 20, 2008 at 9:28 PM, Alexey Salmin <[EMAIL PROTECTED]> wrote: > 2008/11/20 Michael Matz <[EMAIL PROTECTED]>: >> Hi, >> >> On Wed, 19 Nov 2008, H.J. Lu wrote: >> >>> On Wed, Nov 19, 2008 at 7:18 PM, Nicholas Nethercote >>> <[EMAIL PROTECTED]> wrote: >>> > On Tue, 18 Nov 2008, H.J. Lu wrote: >>> > >>> >>> I used malloc to create my arrays instead of creating the in the stack. >>> >>> My program is working now but it is very slow. >>> >>> >>> >>> I use two-dimensional arrays. The way I access element (i,j) is: >>> >>> array_name[i*row_length+j] >>> >>> >>> >>> The server that I use has 16GB ram. The ulimit -a command gives the >>> >>> following output: >>> >>> time(seconds) unlimited >>> >>> file(blocks) unlimited >>> >>> data(kbytes) unlimited >>> >>> stack(kbytes) 8192 >>> >> >>> >> ^^^^^^^^^^^^^^^^^^^^^^^^ >>> >> >>> >> That limits stack to 8MB. Please change it to 1GB. >>> > >>> > Why? >>> > >>> >>> int buffer1[250][1000000]; >>> >>> takes close to 1GB on stack. >> >> Read the lines you quoted carefully again. >> >> >> Ciao, >> Michael. >> > > Can you please talk in a more understandable way? I also think that 4 > * 250 * 1000000 is close to 1073741824 which is 1 Gb. And automatic > variables are allocated in stack (which is 8Mb here) instead of data > segment. >
Here, let me help: " >> >>> I used malloc to create my arrays instead of creating the in the stack. >> >>> My program is working now but it is very slow." Do you see why he told HJ to reread the lines he quoted?
