On Wednesday 20 April 2011, Вадим Воеводин wrote:
> Can anyone tell me, is it possible to collect number of fetches and
> cache misses for a particular array using Callgrind/Cachegrind?
Unfortunately not possible at the moment.
The ideal thing would be to add a command line option for "please
separate counters for different variable accesses" ;-)
An easy way to implement it would be to add a client request to
restrict event counter increments to accesses falling into a given
memory range; then you would do the following before your code
fragment:
CALLGRIND_RESTRICT_COLLECTIONRANGE( &(b[0]), &(b[BSIZE]) );
Hmm. Would that be useful?
Josef
> For example, I have such fragment:
>
> for (j = 0; j < length; j++) {
> for (i = ip[j]; i <= ip[j+1]-1; i++) {
> b[ia[i]] = b[ia[i]] + a[i]*x[j];
> }
> }
>
> And I want to collect information only about array /b/. How can this be
> done?
>
> Thanks in advance!
>
>
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