"On the other hand, data coming from main memory cannot be assumed to be sequential and the data cache implementation will try to only fetch the data that was asked for."
Not correct. Prefetching has been around for a while, and rather important in optimization.
Hi. Gustavo Pezzi here (from pikuma.com). You're absolutely right; I'll make sure to pass this to Gabriel and I'm sure we'll add this detail to the blog post soon. Thank you for the heads up.
Lots of fun stuff here. Last I checked, Intel's prefetching only works in the positive direction! A reason to have loops move forward. Also, number of simultaneous prefetching streams depends on architecture.
Comments
"On the other hand, data coming from main memory cannot be assumed to be sequential and the data cache implementation will try to only fetch the data that was asked for."
Not correct. Prefetching has been around for a while, and rather important in optimization.
Hi. Gustavo Pezzi here (from pikuma.com). You're absolutely right; I'll make sure to pass this to Gabriel and I'm sure we'll add this detail to the blog post soon. Thank you for the heads up.
Lots of fun stuff here. Last I checked, Intel's prefetching only works in the positive direction! A reason to have loops move forward. Also, number of simultaneous prefetching streams depends on architecture.