[LLVMdev] LLVM JIT vs Interpreter memory foot print

[jg2]

Hi James,

What I meant by "simple" was that it required very little memory.
Here is the program...

int main() {
	int sum = 0;
	int i,j,k,l;
	int count = 2099999990;

	for( i = 0 ; i <= count ; i++) {
		for( j = 0 ; j <= count ; j++) {
			for( k = 0 ; k <= count ; k++) {
				for( l = 0 ; l <= count ; l++) {
					sum ++;
				}
			}
		}
	}

	printf("Sum: %d\n", sum);
}

-KM


James Northrup-3 wrote:
> 
> can you post the simple but long running program?
> 
> On Jul 29, 2009, at 2:20 PM, jg2 wrote:
> 
>>
>> I want to compare the memory footprint of LLVM JIT vs the  
>> Interpreter on
>> Darwin.
>> I am currently doing this by running lli, on a simple but long running
>> program, with and without the "-force-interpreter option", and then  
>> I look
>> at the Real Memory used by lli in the Activity Monitor. I currently  
>> observe
>> that the JIT takes 4.0MB and the Interpreter takes 1.7MB.
>> Are these values close to what one would expect ?
>> Is there a better way to do this comparison ?
>>
>> Thank,
>> KM
>> -- 
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