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<DIV dir=ltr align=left><SPAN class=406455023-10122007><FONT face=Arial
color=#0000ff size=2>Por razones de fuerza mayor se suspendió el viaje del Prof.
Smith a la Argentina, por lo que la conferencia queda cancelada hasta nuevo
aviso.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=406455023-10122007><FONT face=Arial
color=#0000ff size=2>Lamento las molestias que pueda haber
causado.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=406455023-10122007><FONT face=Arial
color=#0000ff size=2>Esteban Feuerstein</FONT></SPAN></DIV><BR>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=es dir=ltr align=left>
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<FONT face=Tahoma size=2><B>De:</B> Esteban Feuerstein
[mailto:efeuerst@dc.uba.ar] <BR><B>Enviado el:</B> Lunes, 10 de Diciembre de
2007 03:44 p.m.<BR><B>Para:</B> 'Esteban Feuerstein'; 'docentes@dc.uba.ar';
'alumnos@dc.uba.ar'; 'medios@de.fcen.uba.ar'; 'dc-interna@dc.uba.ar';
'redunci@info.unlp.edu.ar'; 'sadio@speedy.org.ar'<BR><B>CC:</B>
'todos@df.uba.ar'; 'todos@dm.uba.ar'; 'alumnos@dm.uba.ar'<BR><B>Asunto:</B>
Conferencia: Multimedia Workloads, Architectures, Performance and the use of
Caches.<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr align=left><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">El
lunes 17 de diciembre próximo, en el Departamento de Computación dela Facultad
de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón I de la
Ciudad Universitaria, en horario y aula a <SPAN
class=312071918-10122007>designar</SPAN>, el Prof.Alan Jay Smith, de la
Computer Science Division de la Universidad de Berkeley, dará una conferencia
de título "Multimedia Workloads, Architectures to Process Them, Their
Performance and the Use of Caches for Multimedia Workloads"
<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">La conferencia será en
inglés.<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US">Abstract:<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US">The last
decade has seen the integration of audio, video, and 3D graphics into existing
workloads as well as the emergence of new workloads dominated by the
processing of these forms of media.<SPAN style="mso-spacerun: yes">
</SPAN>Unfortunately, widely accepted benchmarks which capture these new
workloads in a realistic way have not emerged. We present the Berkeley
multimedia workload, which was developed to facilitate our own studies on
architectural support for multimedia.<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US"><o:p> </o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US">The
caching behavior of multimedia applications has been described as having high
instruction reference locality within small loops, very large working sets,
and poor data cache performance due to non-locality of data references.
Despite this, there is no published research deriving or measuring these
qualities. Utilizing the previously developed Berkeley Multimedia Workload, we
present the results of execution driven cache simulations with the goal of
aiding future media processing architecture design. Our analysis examines the
differences between multimedia and traditional applications in cache behavior.
We find that multimedia applications actually exhibit lower instruction miss
ratios and comparable data miss ratios when contrasted with other widely
studied workloads. In addition, we find that longer data cache line sizes than
are currently used would benefit multimedia
processing.<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US"><o:p> </o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US">Many
microprocessor instruction sets include instructions for accelerating
multimedia applications such as DVD playback, speech recognition and 3D
graphics. Despite general agreement on the need to support this emerging
workload, there are considerable differences between the instruction sets that
have been designed to do so.<SPAN style="mso-spacerun: yes"> </SPAN>We
present a study of the performance of five instruction sets on kernels
extracted from a broad multimedia workload. Each kernel was recoded in the
assembly language of the five multimedia extensions. We compare the
performance of each extension against other architectures as well as to the
original compiled C performance. From our analysis we determine how well
multimedia workloads map to current architectures, what was useful and what
was not. We also propose two enhancements to current architectures: strided
memory operations, and superwide registers.<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US"><o:p> </o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US">The work
to be presented was done with Nathan Slingerland, formerly a graduate student
at UC Berkeley.<o:p></o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US"><o:p> </o:p></SPAN></DIV>
<DIV class=MsoNormal dir=ltr
style="MARGIN: 0cm 0cm 0pt; mso-layout-grid-align: none"><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-US"><o:p> </o:p></SPAN></DIV></BLOCKQUOTE></BODY></HTML>