<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<br>
On 8/6/2012 12:06 AM, Jed Brown wrote:
<blockquote
cite="mid:CAM9tzSn6RbCdDOdY1WFoOPrkt1gXxt2ymAB9bqtHe5_aNp=axQ@mail.gmail.com"
type="cite">
<div class="gmail_quote">On Thu, Jun 7, 2012 at 4:56 PM, TAY
wee-beng <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:zonexo@gmail.com" target="_blank">zonexo@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<pre>I looked at the manual but I'm not sure how to get better performance.</pre>
</blockquote>
<div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)">
##########################################################</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> #
#</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> #
WARNING!!! #</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> #
#</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> # This
code was compiled with a debugging option, #</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> # To get
timing results run ./configure #</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> # using
--with-debugging=no, the performance will #</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> # be
generally two or three times faster. #</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)"> #
#</b></font></div>
<div><font face="courier new, monospace" size="4"><b
style="background-color:rgb(255,0,0)">
##########################################################</b></font></div>
</div>
<div><br>
</div>
<div>I wonder if making this text bigger, red, bold, and
blinking (which I can't seem to do in this email) would
increase the chances that you read it.</div>
</div>
</blockquote>
<br>
Thanks for the reminder Jed, I was having segmentation fault earlier
and hence I compile in debug mode to detect the error. I'll try out
different options to determine the best options.<br>
<blockquote
cite="mid:CAM9tzSn6RbCdDOdY1WFoOPrkt1gXxt2ymAB9bqtHe5_aNp=axQ@mail.gmail.com"
type="cite">
<div class="gmail_quote">
<div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<pre> Also, what are the more common options to start with. Is there an appropriate C example? Some options are:
<b>PCMGSetLevels</b> - how many lvls are appropriate?
PCMGSetCycleType -
PCMGSetNumberSmoothUp/down etc</pre>
</blockquote>
<div>1. Control this stuff using command line options.
Recompiling to run a different method was obsolete decades
ago.</div>
<div><br>
</div>
<div>2. You need to understand a little about the math and a
little about the performance of each component in isolation. I
recommend seeing how time moves between different operations
as you modify the algorithm.</div>
<div><br>
</div>
<div>3. Experiment with your machine and the methods. Learn
which configurations have good algorithmic performance (few
iterations) and which execute most efficiently.</div>
</div>
</blockquote>
</body>
</html>