<s>
In	O
computer	B-General_Concept
architecture	I-General_Concept
,	O
frequency	B-General_Concept
scaling	I-General_Concept
(	O
also	O
known	O
as	O
frequency	B-General_Concept
ramping	I-General_Concept
)	O
is	O
the	O
technique	O
of	O
increasing	O
a	O
processor	O
's	O
frequency	O
so	O
as	O
to	O
enhance	O
the	O
performance	O
of	O
the	O
system	O
containing	O
the	O
processor	O
in	O
question	O
.	O
</s>
<s>
Frequency	B-General_Concept
ramping	I-General_Concept
was	O
the	O
dominant	O
force	O
in	O
commodity	O
processor	O
performance	O
increases	O
from	O
the	O
mid-1980s	O
until	O
roughly	O
the	O
end	O
of	O
2004	O
.	O
</s>
<s>
Increasing	O
processor	O
power	O
consumption	O
led	O
ultimately	O
to	O
Intel	O
's	O
May	O
2004	O
cancellation	O
of	O
its	O
Tejas	B-Device
and	I-Device
Jayhawk	I-Device
processors	O
,	O
which	O
is	O
generally	O
cited	O
as	O
the	O
end	O
of	O
frequency	B-General_Concept
scaling	I-General_Concept
as	O
the	O
dominant	O
computer	B-General_Concept
architecture	I-General_Concept
paradigm	O
.	O
</s>
<s>
Moore	O
's	O
Law	O
was	O
still	O
in	O
effect	O
when	O
frequency	B-General_Concept
scaling	I-General_Concept
ended	O
.	O
</s>
<s>
With	O
the	O
end	O
of	O
frequency	B-General_Concept
scaling	I-General_Concept
,	O
new	O
transistors	O
(	O
which	O
are	O
no	O
longer	O
needed	O
to	O
facilitate	O
frequency	B-General_Concept
scaling	I-General_Concept
)	O
are	O
used	O
to	O
add	O
extra	O
hardware	O
,	O
such	O
as	O
additional	O
cores	O
,	O
to	O
facilitate	O
parallel	B-Operating_System
computing	I-Operating_System
-	O
a	O
technique	O
that	O
is	O
being	O
referred	O
to	O
as	O
parallel	O
scaling	O
.	O
</s>
<s>
The	O
end	O
of	O
frequency	B-General_Concept
scaling	I-General_Concept
as	O
the	O
dominant	O
cause	O
of	O
processor	O
performance	O
gains	O
has	O
caused	O
an	O
industry-wide	O
shift	O
to	O
parallel	B-Operating_System
computing	I-Operating_System
in	O
the	O
form	O
of	O
multicore	B-Architecture
processors	I-Architecture
.	O
</s>
