<s>
ULE	O
is	O
the	O
default	O
scheduler	O
for	O
the	O
FreeBSD	B-Operating_System
operating	B-General_Concept
system	I-General_Concept
(	O
versions	O
7.1	O
and	O
forward	O
)	O
for	O
the	O
i386	O
and	O
AMD64	O
architectures	O
.	O
</s>
<s>
It	O
was	O
introduced	O
in	O
FreeBSD	B-Operating_System
version	O
5	O
,	O
but	O
it	O
was	O
disabled	O
by	O
default	O
for	O
a	O
time	O
in	O
favor	O
of	O
the	O
traditional	O
BSD	O
scheduler	O
until	O
it	O
reached	O
maturity	O
.	O
</s>
<s>
The	O
original	O
BSD	O
scheduler	O
does	O
not	O
make	O
full	O
use	O
of	O
SMP	B-Operating_System
or	O
SMT	B-Operating_System
,	O
which	O
is	O
important	O
in	O
modern	O
computing	O
environments	O
.	O
</s>
<s>
The	O
primary	O
goal	O
of	O
the	O
ULE	O
project	O
is	O
to	O
make	O
better	O
use	O
of	O
SMP	B-Operating_System
and	O
SMT	B-Operating_System
environments	O
.	O
</s>
<s>
ULE	O
should	O
improve	O
performance	O
in	O
both	O
uniprocessor	B-Operating_System
and	O
multiprocessor	B-Operating_System
environments	O
,	O
as	O
well	O
as	O
interactive	O
response	O
under	O
heavy	O
load	O
.	O
</s>
