<s>
The	O
Graph500	B-Device
is	O
a	O
rating	O
of	O
supercomputer	B-Architecture
systems	O
,	O
focused	O
on	O
data-intensive	B-Operating_System
loads	I-Operating_System
.	O
</s>
<s>
The	O
project	O
was	O
announced	O
on	O
International	O
Supercomputing	B-Architecture
Conference	O
in	O
June	O
2010	O
.	O
</s>
<s>
The	O
first	O
list	O
was	O
published	O
at	O
the	O
ACM/IEEE	O
Supercomputing	B-Architecture
Conference	O
in	O
November	O
2010	O
.	O
</s>
<s>
The	O
main	O
performance	O
metric	O
used	O
to	O
rank	O
the	O
supercomputers	B-Architecture
is	O
GTEPS	B-Operating_System
(	O
giga	O
-	O
traversed	B-Operating_System
edges	I-Operating_System
per	I-Operating_System
second	I-Operating_System
)	O
.	O
</s>
<s>
Richard	O
Murphy	O
from	O
Sandia	O
National	O
Laboratories	O
,	O
says	O
that	O
"	O
The	O
Graph500	B-Device
's	O
goal	O
is	O
to	O
promote	O
awareness	O
of	O
complex	O
data	O
problems	O
"	O
,	O
instead	O
of	O
focusing	O
on	O
computer	O
benchmarks	O
like	O
HPL	O
(	O
High	O
Performance	O
Linpack	O
)	O
,	O
which	O
TOP500	B-Operating_System
is	O
based	O
on	O
.	O
</s>
<s>
The	O
algorithm	O
and	O
implementation	O
that	O
won	O
the	O
championship	O
is	O
published	O
in	O
the	O
paper	O
titled	O
"	O
Extreme	O
scale	O
breadth-first	O
search	O
on	O
supercomputers	B-Architecture
"	O
.	O
</s>
<s>
There	O
is	O
also	O
list	O
Green	O
Graph	B-Device
500	I-Device
,	O
which	O
uses	O
same	O
performance	O
metric	O
,	O
but	O
sorts	O
list	O
according	O
to	O
performance	O
per	O
Watt	O
,	O
like	O
Green	B-Application
500	I-Application
works	O
with	O
TOP500	B-Operating_System
(	O
HPL	O
)	O
.	O
</s>
<s>
The	O
benchmark	O
used	O
in	O
Graph500	B-Device
stresses	O
the	O
communication	O
subsystem	O
of	O
the	O
system	O
,	O
instead	O
of	O
counting	O
double	O
precision	O
floating-point	O
.	O
</s>
<s>
The	O
implementation	O
strategy	O
that	O
have	O
won	O
the	O
championship	O
on	O
the	O
Japanese	O
K	B-Device
computer	I-Device
is	O
described	O
in	O
.	O
</s>
