$6\mathrm{.}9$ Consider the following three CPU organizations:

CPU SS: A two$-$core superscalar microprocessor that provides out$-$of$-$order issue

capabilities on two function units $($FUs$).$ Only a single thread can run on each core

at a time.

CPU MT: A fine$-$grained multithreaded processor that allows instructions from

two threads to be run concurrently $($i$.$e$.,$ there are two functional units$),$ though

only instructions from a single thread can be issued on any cycle.

CPU SMT: An SMT processor that allows instructions from two threads to be run

concurrently $($i$.$e$.,$ there are two functional units$),$ and instructions from either or

both threads can be issued to run on any cycle.

Assume we have two threads $x$ and $Y$ to run on these CPUs that include the

following operations:

Assume all instructions take a single cycle to execute unless noted otherwise or

they encounter a hazard.

$6\mathrm{.}9\mathrm{.}1[10]$$$6\mathrm{.}4>$ Assume that you have one SS CPU. How many cycles will it

take to execute these two threads? How many issue slots are wasted due to hazards?

$6\mathrm{.}9\mathrm{.}2[10]$$$6\mathrm{.}4>$ Now assume you have two SS CPUs. How many cycles will it

take to execute these two threads? How many issue slots are wasted due to hazards?

$6\mathrm{.}9\mathrm{.}3[10]$$$6\mathrm{.}4>$ Assume that you have one MT CPU. How many cycles will it

take to execute these two threads? How many issue slots are wasted due to hazards?

$6\mathrm{.}9\mathrm{.}4[10]$$$6\mathrm{.}4>$ Assume you have one SMT CPU. How many cycles will it take

to execute the two threads? How many issue slots are wasted due to hazards?