Timothy Miller wrote:
On 4/18/06, Timothy Baldridge <[EMAIL PROTECTED]> wrote:
The other question I have, is how much variance is there going to be
in a read? Sure on a CPU allot of it depends on if the data is in the
L1 or L2 Cache or memory. But since we are only going to be going to
memory (please tell me no one here was actually thinking of putting a
cache on a GPU). What will the variance be?
Lots. A row miss takes one amount of time; refreshes cause random
delays. The worst are video reads which have the highest priority and
can tie up the memory for extended periods.
The video refresh reads means that we almost have to have a cache.
However, this doesn't have to be a general purpose cache, it can even be
a cache which requires explicit instructions to manage.
--
JRT
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