<s>
AMD	B-Language
CodeAnalyst	I-Language
is	O
a	O
GUI-based	O
code	O
profiler	O
for	O
x86	B-Operating_System
and	O
x86-64-based	O
machines	O
.	O
</s>
<s>
CodeAnalyst	B-Language
has	O
similar	O
look	O
and	O
feel	O
on	O
both	O
Linux	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
platforms	O
.	O
</s>
<s>
CodeAnalyst	B-Language
uses	O
specific	O
hardware	O
profiling	O
techniques	O
which	O
are	O
designed	O
to	O
work	O
with	O
AMD	O
processors	O
,	O
as	O
well	O
as	O
a	O
timer-based	O
profiling	O
technique	O
which	O
does	O
not	O
require	O
specific	O
hardware	O
support	O
;	O
this	O
allows	O
a	O
subset	O
of	O
profiling	O
features	O
to	O
work	O
on	O
non-AMD	O
processors	O
,	O
such	O
as	O
Intel	O
processors	O
.	O
</s>
<s>
As	O
of	O
March	O
2013	O
,	O
CodeAnalyst	B-Language
has	O
been	O
replaced	O
by	O
AMD	B-Language
CodeXL	I-Language
.	O
</s>
<s>
CodeAnalyst	B-Language
is	O
built	O
on	O
OProfile	B-Application
for	O
the	O
Linux	B-Application
platform	O
and	O
is	O
available	O
as	O
a	O
free	O
download	O
.	O
</s>
<s>
The	O
GUI	B-Application
assists	O
in	O
various	O
kinds	O
of	O
code	O
profiling	O
including	O
time	O
based	O
profiling	O
,	O
hardware	O
event-based	O
profiling	O
,	O
instruction-based	O
profiling	O
and	O
others	O
.	O
</s>
<s>
This	O
produces	O
statistics	O
about	O
details	O
such	O
as	O
time	O
spent	O
in	O
each	O
subroutine	O
which	O
can	O
be	O
drilled	O
down	O
to	O
the	O
source	O
code	O
or	O
instruction	B-General_Concept
level	I-General_Concept
.	O
</s>
<s>
The	O
time	O
taken	O
by	O
the	O
instructions	O
can	O
be	O
indicative	O
of	O
stalls	O
in	O
the	O
pipeline	B-General_Concept
during	O
instruction	O
execution	O
.	O
</s>
<s>
Optimization	O
could	O
be	O
as	O
simple	O
as	O
reordering	O
the	O
instructions	O
for	O
maximum	O
utilization	O
of	O
a	O
data	O
line	O
cache	O
or	O
altering/removing	O
the	O
branches	B-General_Concept
and	O
loops	O
so	O
that	O
the	O
maximum	O
number	O
of	O
execution	O
units( 	O
Load/Store	O
units	O
,	O
ALU	B-General_Concept
,	O
FP	B-Algorithm
execution	O
unit	O
...	O
)	O
are	O
utilized	O
in	O
parallel	O
.	O
</s>
<s>
Support	O
for	O
PERF	B-Application
was	O
added	O
in	O
CodeAnalyst	B-Language
3.4	O
,	O
allowing	O
users	O
to	O
choose	O
between	O
OProfile	B-Application
and	O
PERF	B-Application
as	O
the	O
profiling	O
backend	O
.	O
</s>
<s>
CodeAnalyst	B-Language
supports	O
IBS	O
(	O
Instruction-Based	O
Sampling	O
)	O
that	O
was	O
introduced	O
in	O
Family	O
10h	O
AMD	O
processors	O
(	O
Barcelona	O
)	O
.	O
</s>
<s>
With	O
IBS	O
support	O
,	O
CodeAnalyst	B-Language
can	O
more	O
precisely	O
identify	O
instructions	O
that	O
cause	O
pipeline	B-General_Concept
stalls	O
and	O
cache	O
misses	O
.	O
</s>
<s>
The	O
Linux	B-Application
version	O
of	O
CodeAnalyst	B-Language
is	O
available	O
under	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
2.0	O
.	O
</s>
<s>
CodeAnalyst	B-Language
also	O
uses	O
other	O
open-source	O
components	O
,	O
including	O
the	O
Qt	B-Language
framework	I-Language
,	O
libdwarf	O
,	O
libelf	O
,	O
and	O
the	O
Binary	B-Application
File	I-Application
Descriptor	I-Application
library	I-Application
.	O
</s>
