Messages in this thread | | | From | Denis Vlasenko <> | Subject | Re: Kernel cached memory | Date | Sat, 23 Jul 2005 15:31:20 +0300 |
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On Saturday 23 July 2005 00:43, John Pearson wrote: > Wouldn't having (practically) all your memory used for cache slow down > starting a new program? First it would have to free up that space, and then > put stuff in that space, taking potentially twice as long. I think there > should be a system call for freeing cached memory, for those that do want to > do it.
I think this one is good enough:
#include <stdlib.h>
int main() { void *p; unsigned size = 1<<20; unsigned long total=0; while(size) { p = malloc(size); if(!p) size>>=1; else { memset(p, 0x77, size); total+=size; printf("Allocated %9u bytes, %12lu total\n",size,total); } } return 0; }
You may want to adapt it so that it takes an argument now many megabytes to eat before it dies. -- vda
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