<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hello Johan, Martin and Steve,<br>
<br>
Thank you for your thoughts. <br>
To make it more clear I've put the graphs and some data here:
<a class="moz-txt-link-freetext" href="https://noc.lowvoice.nl/test/stats">https://noc.lowvoice.nl/test/stats</a><br>
<br>
I get the idea that the graph is made up of the datapoints
aggregated for the needed pixel width. But for the VDEFs it should
operate on the full dataset according to the docs:
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<b style="color: rgb(0, 0, 0); font-family: sans-serif; font-size:
medium; font-style: normal; font-variant: normal; letter-spacing:
normal; line-height: 24px; orphans: auto; text-align: left;
text-indent: 0px; text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">"VDEF</b><span
style="color: rgb(0, 0, 0); font-family: sans-serif; font-size:
medium; font-style: normal; font-variant: normal; font-weight:
normal; letter-spacing: normal; line-height: 24px; orphans: auto;
text-align: left; text-indent: 0px; text-transform: none;
white-space: normal; widows: auto; word-spacing: 0px;
-webkit-text-stroke-width: 0px; display: inline !important; float:
none;"><span class="Apple-converted-space"> </span>instructions
work on an entire data set in one run."</span>, so pre-aggregation
should not be needed. Pre aggregation, in the case of 95th
percentile, causes problems. (pre aggregating datapoints as average
and then getting the MAX is also a good example of why this should
not happen). <br>
<br>
I understand that you eventually lose resolution as a tradeoff
between storage-space and accuracy, but I do not understand why
VDEFS would choose not to use all the available data. <br>
<br>
The 'step=300' trick, as suggested by you all and the 'use different
DEFs & VDEFs for the graph part and the gprint part' as
suggested by Steve, have no influence on my results as you can see
on the above page.<br>
<br>
Any additional thoughts would be appreciated.<br>
<br>
Regards,<br>
Marius Karthaus<br>
<br>
<br>
<br>
<br>
<br>
</body>
</html>