sysperfana/perfinvestigator/com.nokia.carbide.cpp.pi.doc.user/html/concepts/methods.htm
author Toni Pulkkinen <ext-toni.p.pulkkinen@nokia.com>
Wed, 21 Apr 2010 15:14:16 +0300
changeset 5 844b047e260d
parent 2 b9ab3b238396
permissions -rw-r--r--
Performance Investigator Carbide extension 2.3.0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
2
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     1
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     2
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     3
<html>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     4
<head>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     5
	<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     6
	<title>Performance Measurement Methods</title>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     7
    <link href="../../book.css" rel="stylesheet" type="text/css">
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     8
</head>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
     9
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    10
<body>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    11
<h2>Performance Measurement Methods</h2>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    12
<p> Characteristics of the software being analyzed will set rules and freedoms for performance measurements. Similarly, characteristics of the hardware architecture play a significant role in the mechanisms that can be used in performance measurement. If performing computations without a multitasking operating system, a thread-load distribution does not exist since there would be no threads. Computational load within a system that bases heavily on external interrupts is more unpredictable and complex from the software point of view than the load of a system in which most of the interrupts are caused by internal mechanisms known to the system. Therefore the measurement mechanisms have to suit the particular dynamics of the software being measured. Those mechanisms have to be feasible within the particular hardware. This makes things a bit more complicated for software based performance measurements since the same measurement software cannot necessarily be used for two systems with different run-time or input/output dynamics or hardware architecture. The methods and building blocks used in performance measurements include:</p>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    13
<ul>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    14
  <li><a href="../reference/methods/compile_time.htm">Compile-Time Symbolic Information</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    15
  <li><a href="../reference/methods/delayed_fn_call.htm">DFC, Delayed Function Call</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    16
  <li><a href="../reference/methods/dynamic_bin_res.htm">Dynamic Binary Resolution</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    17
  <li><a href="../reference/methods/file_sys_storing.htm">File System</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    18
  <li><a href="../reference/methods/int_stack.htm">Interrupt Stack</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    19
  <li><a href="../reference/methods/kernel_containers.htm">Kernel Containers</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    20
  <li><a href="../reference/methods/kernel_hook.htm">Kernel Hook</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    21
  <li><a href="../reference/methods/link_register.htm">Link Register value</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    22
  <li><a href="../reference/methods/os_thread.htm">OS Thread Name and ID</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    23
  <li><a href="../reference/methods/periodic_int.htm">Periodic Interrupt</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    24
  <li><a href="../reference/methods/pgm_counter.htm">Program Counter value</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    25
  <li><a href="../reference/methods/read_write_load.htm">Read/Write Load Characteristics (Memory and File system)</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    26
  <li><a href="../reference/methods/rofs.htm">ROFS</a></li>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    27
</ul>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    28
<p class="note"> <strong>NOTE:</strong> Many of these methods and building blocks are specific to the OMAP/ARM architecture and Symbian OS actually used.</p>
5
844b047e260d Performance Investigator Carbide extension 2.3.0
Toni Pulkkinen <ext-toni.p.pulkkinen@nokia.com>
parents: 2
diff changeset
    29
<div id="footer">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
2
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    30
</body>
b9ab3b238396 Initial version of Performance Investigator under EPL
Matti Laitinen <matti.t.laitinen@nokia.com>
parents:
diff changeset
    31
</html>