On Fri, Jun 11, 2004 at 07:11:25PM -0400, Ed K. wrote:On Fri, 11 Jun 2004, fredex wrote:On Fri, Jun 11, 2004 at 01:45:00PM -0400, Ed K. wrote:I have fedora core2 installed with kernel: kernel-2.6.5-1.358
I must call system(....) about 300,000 times from a process that has 175MB allocated on a computer with only 256MB of RAM. But after about the 5,000th call, i get an out of memory error (errno: 12 Cannot allocate memory) when I call the system function.
Sounds like a pretty dangerous thing to be doing. You're sure there's no better way to design this program?
If you give some more details on what you're doing and why it has to be done this way, perhaps someone can ofer some helpful suggestions.
I don't know how much I can tell about the project, doesn't that suck? But you can read some of the publicity at: http://www.phppo.cdc.gov/cyto/CytoView_Demo.asp
Sorry, but you need a windows client to view the demos.
I do have a working test:
#include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <errno.h>
int main(int argc, char *argv[]) { unsigned char *data; int i;
data=malloc(500*1024*1024); memset(data,0,500*1024*1024);
for (i=0; i<100000; i++) system("cat /proc/meminfo"); }
This does not cause problems on FC1 (kernel 2.4.22-1.2188) But does on FC2 (kernel 2.6.5-1.358)
Is this a glibc bug or a kernel bug?
Good question!
it's running (apparetly) fine on my TAO linux box, but it's kernel 2.4.x and has a gig of RAM.
That is my experience too. Works great on all my 2.4 kernels and causes a memory leak on the 2.6 kernels. Wonder if anyone else notices a memory leak on their 2.6 kernels.
ed
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