Re: [PATCH] x86: Run checksumming in parallel accross multiple alu's

[Eric Dumazet]

On Fri, 2013-10-18 at 12:50 -0400, Neil Horman wrote:
> > 

> 	for(i=0;i<100000;i++) {
> 		sum = csum_partial(buf+offset, PAGE_SIZE, sum);
> 		offset = (offset < BUFSIZ-PAGE_SIZE) ? offset+PAGE_SIZE  : 0;
> 	}

Please replace this by random accesses, and use the more standard 1500
length.

offset = prandom_u32() % (BUFSIZ - 1500);
offset &= ~1U;

sum = csum_partial(buf + offset, 1500, sum);

You are basically doing sequential accesses, so prefetch should
be automatically done by cpu itself.

Thanks !


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