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. -- ---- Fred Smith -- fredex@xxxxxxxxxxxxxxxxxxxxxx ----------------------------- "For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart." ---------------------------- Hebrews 4:12 (niv) ------------------------------
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