To anybody who had an SO Careers profile: beware of your privacy! Your Careers profile has been changed into a “Developer Story” (which sucks and may have bad data), and employers may now see a link to your SO profile even if they formerly didn't. To unlink, go to the “Developer Story” tag in your SO profile, hover over your avatar, click on the “Edit” button that appears and untick all the network sites. Then hover over the tags below, click “Edit”, and untick all the tags.
@Gilles if you care, this explanation is awesome!(about I/O) https://en.wikipedia.org/wiki/Bus_%28computing%29#Background_and_nomenclature it really builds up from the ground
"In modern systems the performance difference between the CPU and main memory has grown so great that increasing amounts of high-speed memory is built directly into the CPU, known as a cache. In such systems, CPUs communicate using high-performance buses that operate at speeds much greater than memory, and communicate with memory using protocols similar to those used solely for peripherals in the past."
I finally understand why we need a dram controller.
does anyone know how to correct this? mpsvars.sh: Warning: Hardware events collection is disabled by default. To enable it, run mpsvars.sh with --vtune (recommended) or --papi option.