asmprofiler

AsmProfiler is a free and open source profiler for 32 bit Windows applications.

NOTE: Source code has moved to GitHub!

Last change: 25 November 2013

Introduction

AsmProfiler can profile your application to find bottlenecks in your code (for optimizations). It is a Windows profiler (Windows NT, 2000, XP, Vista, Win7 for 32bit x86 processor) and can profile any function (dll, c++, delphi, ?) without changing the original code or even the need for the original code.

AsmProfiler consists of 2 parts: * Sampling mode:

For easy "click-and-go" but coarse grained profiling.
- Coarse grained, only maximum of 1000 samples per second (theoretical) is possible, so many small function calls will be missed.
+ Low overhead (profiler app runs at normal speed)
+ No modification, no side-effects (no change of the binary cpu instructions, samples are taken "remotely" by only reading the memory)

  • Instrumenting mode:

    For exact time measurement of any function call.

    • High memory usage and some overhead for each function call.
    • More difficult to set up (functions must be marked before they are profiled)
    • In-memory executable is changed (detouring/hooking) to be able to log every function execution
    • Every call is stored, so exact function tracing possible!

Download AsmProfiler Complete v1.1.5.zip for both profiler modes.

Please donate :)

http://www.pledgie.com/campaigns/7734'>http://www.pledgie.com/campaigns/7734.png?skin_name=chrome' alt='Click here to lend your support to: AsmProfiler and make a donation at www.pledgie.com !' border='0' />

Details

Quick Start Tip

The easiest way to get started is by downloading the complete pack. After downloading and extracting, run the sampling profiler first. Execute a profiling session for the part of your program you want to investigate (for example, a batch processing, a heavy calculation, etc). Now you have a first impression of the functions that are executed, and how long they taken. You can save the detected functions by right clicking on the tree view (to be used by the instrumenting profiler). Via the "inject asmprofiler dll" button, an instrumenting profiling session can be started to get detailed information of the logged functions.

The "instrumenting mode" was made first (as "proof of concept", can have some rough edges). After some time, the "sampling mode" was made separately. In the future, the "instrumenting mode" will be completely rebuild and integrated in the GUI of the "sampling mode".

For more information a details of the 2 profiling modes, please take a look at the following pages: * AsmProfiler, Sampling mode * Some screenshots * Download latest version: * AsmProfiler Sampling v1.1.5

History

  • 12 October 2012, Lots of improvements on the sampling profiler:
    • Processing results after a sampling session if much much faster now (some seconds instead of minutes)
    • Double click on a function in the first tab adds a filter to "raw stacks" tab, so all stacks in which the selected function is found can be viewed easily
    • CPU duration of each thread is shown in the list (easier to see which threads did some heavy work)
    • Treeviews can be saved to file (html, rtf, text)
    • Profiled function list can be exported to the instrumenting profiler for exact time measurement (so sampling can be used for a first step, quick detection of executed functions, no need to manually select all units and functions in the instrumenting profiler)
    • AsmProfiler dll injection (for instrumenting profiling) should work again (and some better error handling)
    • Process list is sorted with newest applications on top (most likely to get profiled instead of older long running background processes)

  • 3 November 2011

  • 1 April 2011

  • 01 march 2010

Need some help?

If you need some help with the AsmProfiler, or want to hire me as a profiler specialist (remote or in The Netherlands),
please don't hesitate to e-mail me! mailto:andre.mussche+asmprofiler@gmail.com

Project Information

Labels:
profiler profiling profile assembly detouring delphi detour slow speed optimize speedup performance