 | | | Benchmarking C++ operators | Benchmarking C++ operators 2004-06-01 - By Helge Mathee
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really?
thanks for sharing.....
good one.
-- -- Original Message -- --
From: Guy Rabiller
To: XSI@(protected)
Sent: Tuesday, June 01, 2004 5:12 PM
Subject: Re: Benchmarking C++ operators
On factor to enhance the speed of any operator, is to not query the ports and
parameters with string names.
Rather use indexes with GetPortAt and GetParameters.
You might get considerable speed enhancement.
--
guy rabiller | 3d technical director @ LaMaison
Felix Gebhardt wrote:
Luc-Eric Rousseau wrote:
right, QueryPerformanceCounter is what we
use for mesuring an operator's performance.
Now I only need to actually HAVE your operator's performance. But hey, at
least we use the same timer ;)
Thanks for telling,
Felix
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)]On Behalf
Of Felix Gebhardt
Posted At: Tuesday, June 01, 2004 10:08 AM
Posted To: xsi
Conversation: Benchmarking C++ operators
Subject: Re: Benchmarking C++ operators
Hi Daniel, thanks for helping out,
I already had a look at VTune. Like you said. It's way overdosed for my
purpose and too expensive to setup. I will have a look at the MSVC option
but I also found something interesting on codeproject.
http://www.codeproject.com/cpp/precisetimer.asp
If there is anything else, keep em coming,
Felix
Daniel Bachler wrote:
Well there is Intels Vtune, but it's quite expensive (although I think
that there is a trial version available) and it can be a bit tough to set
up so that it returns some usefull information. MSVC has some kind of
profiler of its own IIRC, but without any graphical representation or
anything fancy. And, last but not least, you can of course take
timestamps yourself everytime you operator gets called and everytime it
returns and measuring that time. If it's something simple I would first
try the last trick, it's quite fast to setup and very precise, as the
time you loose on profiling is really negligible. If you want to take it
a step further you can store an array of simple structures containing
last starttime and amount of time in that block, then write two small
function, like this: (C++ style pseudocode)
Void StartBlock(int blockIndex)
{
m_ProfilerStructures[blockIndex].m_Starttime = gettime();
}
Void EndBlock(int blockIndex)
{
m_ProfilerStructures[blockIndex].m_ElapsedTime += gettime() -
m_ProfilerStructures[blockIndex].m_Startime();
}
You can then use it like this:
StartBlock(INIT);
Initialize();
EndBlock(INIT);
StartBlock(MAIN);
DoStruff();
EndBlock(MAIN);
Daniel
-- --Original Message-- --
From: owner-xsi@(protected)
[mailto:owner-xsi@(protected)] On Behalf Of Felix Gebhardt
Sent: Tuesday, June 01, 2004 2:22 PM
To: XSI@(protected)
Subject: Benchmarking C++ operators
Hi all,
does anyone happen to have an advise on what's the best way
to benchmark
compiled operators? In VBS I just would take a time snapshot
but it's not
too precise. How to nail it down better in C++? Any simple
but precise way
or free and easy to use analyzer/profiler?
Suggestions greatly appreciated,
Felix
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<DIV><FONT face=Arial size=2>really?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>thanks for sharing.....</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>good one.</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">-- -- Original Message -- -- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=guy@(protected) href="mailto:guy@(protected)">Guy Rabiller</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=XSI@(protected)
href="mailto:XSI@(protected)">XSI@(protected)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, June 01, 2004 5:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Benchmarking C++
operators</DIV>
<DIV><BR></DIV>On factor to enhance the speed of any operator, is to not
query
the ports and parameters with string names.<BR>Rather use indexes with
GetPortAt and GetParameters.<BR>You might get considerable speed
enhancement.<BR><PRE class=moz-signature cols="$mailwrapcol">--
guy rabiller | 3d technical director @ LaMaison</PRE><BR><BR>Felix Gebhardt
wrote:<BR>
<BLOCKQUOTE cite=mid006401c447e9$3ae6c1d0$8202a8c0@(protected) type="cite"><PRE
wrap="">Luc-Eric Rousseau wrote:
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">right, QueryPerformanceCounter is what
we
use for mesuring an operator's performance.
</PRE></BLOCKQUOTE><PRE wrap=""><!---->
Now I only need to actually HAVE your operator's performance. But hey, at
least we use the same timer ;)
Thanks for telling,
Felix
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">-- --Original Message-- --
From: <A class=moz-txt-link-abbreviated href="mailto:owner-xsi@(protected)"
>owner-xsi@(protected)</A> [<A class=moz-txt-link-freetext href="mailto:owner
-xsi@(protected)">mailto:owner-xsi@(protected)</A>]On Behalf
Of Felix Gebhardt
Posted At: Tuesday, June 01, 2004 10:08 AM
Posted To: xsi
Conversation: Benchmarking C++ operators
Subject: Re: Benchmarking C++ operators
Hi Daniel, thanks for helping out,
I already had a look at VTune. Like you said. It's way overdosed for my
purpose and too expensive to setup. I will have a look at the MSVC option
but I also found something interesting on codeproject.
<A class=moz-txt-link-freetext href="http://www.codeproject.com/cpp
/precisetimer.asp">http://www.codeproject.com/cpp/precisetimer.asp</A>
If there is anything else, keep em coming,
Felix
Daniel Bachler wrote:
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">Well there is Intels Vtune, but it's
quite expensive (although I think
that there is a trial version available) and it can be a bit tough to set
up so that it returns some usefull information. MSVC has some kind of
profiler of its own IIRC, but without any graphical representation or
anything fancy. And, last but not least, you can of course take
timestamps yourself everytime you operator gets called and everytime it
returns and measuring that time. If it's something simple I would first
try the last trick, it's quite fast to setup and very precise, as the
time you loose on profiling is really negligible. If you want to take it
a step further you can store an array of simple structures containing
last starttime and amount of time in that block, then write two small
function, like this: (C++ style pseudocode)
Void StartBlock(int blockIndex)
{
m_ProfilerStructures[blockIndex].m_Starttime = gettime();
}
Void EndBlock(int blockIndex)
{
m_ProfilerStructures[blockIndex].m_ElapsedTime += gettime() -
m_ProfilerStructures[blockIndex].m_Startime();
}
You can then use it like this:
StartBlock(INIT);
Initialize();
EndBlock(INIT);
StartBlock(MAIN);
DoStruff();
EndBlock(MAIN);
Daniel
</PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">-- --Original Message-- --
From: <A class=moz-txt-link-abbreviated href="mailto:owner-xsi@(protected)"
>owner-xsi@(protected)</A>
[<A class=moz-txt-link-freetext href="mailto:owner-xsi@(protected)">mailto
:owner-xsi@(protected)</A>] On Behalf Of Felix Gebhardt
Sent: Tuesday, June 01, 2004 2:22 PM
To: <A class=moz-txt-link-abbreviated href="mailto:XSI@(protected)">XSI
@(protected)</A>
Subject: Benchmarking C++ operators
Hi all,
does anyone happen to have an advise on what's the best way
to benchmark
compiled operators? In VBS I just would take a time snapshot
but it's not
too precise. How to nail it down better in C++? Any simple
but precise way
or free and easy to use analyzer/profiler?
Suggestions greatly appreciated,
Felix
</PRE></BLOCKQUOTE></BLOCKQUOTE><PRE wrap="">---
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