<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
Average	B-General_Concept
Memory	I-General_Concept
Access	I-General_Concept
Time	I-General_Concept
(	O
AMAT	O
)	O
is	O
a	O
common	O
metric	O
to	O
analyze	O
computer	B-General_Concept
memory	I-General_Concept
system	O
performance	O
.	O
</s>
<s>
In	O
addition	O
,	O
AMAT	O
can	O
be	O
extended	O
recursively	O
to	O
multiple	O
layers	O
of	O
the	O
memory	B-General_Concept
hierarchy	I-General_Concept
.	O
</s>
<s>
It	O
focuses	O
on	O
how	O
locality	B-General_Concept
and	O
cache	B-General_Concept
misses	O
affect	O
overall	O
performance	O
and	O
allows	O
for	O
a	O
quick	O
analysis	O
of	O
different	O
cache	B-General_Concept
design	O
techniques	O
.	O
</s>
<s>
Hit	O
latency	O
(	O
H	O
)	O
is	O
the	O
time	O
to	O
hit	O
in	O
the	O
cache	B-General_Concept
.	O
</s>
<s>
Miss	O
rate	O
(	O
MR	O
)	O
is	O
the	O
frequency	O
of	O
cache	B-General_Concept
misses	O
,	O
while	O
average	O
miss	O
penalty	O
(	O
AMP	O
)	O
is	O
the	O
cost	O
of	O
a	O
cache	B-General_Concept
miss	O
in	O
terms	O
of	O
time	O
.	O
</s>
<s>
In	O
this	O
manner	O
,	O
this	O
recursive	O
definition	O
can	O
be	O
extended	O
throughout	O
all	O
layers	O
of	O
the	O
memory	B-General_Concept
hierarchy	I-General_Concept
.	O
</s>
