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2013, Thursday December 5

New Open Source Multi-Thread ready Memory Manager: SAPMM

Do you remember this former article about scalability of the Delphi memory manager, in multi-thread execution context?

Our SynScaleMM is still experimental.
But did pretty well, for an experiment!

At first, you can take a look at ScaleMM2, which is more stable, and based on the same ground.

But a new multi-thread friendly memory manager for Delphi just came out.
It is in fact the anonymous (and already famous) "NN memory manager" Primož talked about in his article about string building and memory managers.


(Note that in this article, our SynScaleMM was found to be scaling very well, but on the other hand, Primož did compile its benchmark program in Debug mode, so our TTextWriter was not in good shape: when you compile in Release mode, optimizations and inlining are ON, and our good TTextWriter just flies... See the note at the beginning of the article - this is why I never find those benchmarks very informative. I always prefer profiling from the real world with real useful process… and was never convinced by any such naive benchmark.)

OK, back to our business!

SapMM is an interesting beast.
https://code.google.com/p/sapmm

Sounds like if Alexei (the initial coder) has a C coding background. But that's fine when you have to deal with low-level structures and algorithms, as required by a memory manager. :)
It features everything we may ask for such a piece of code: clear design, optimized code (mostly by inlining process), memory leak reporting, some parameters for tuning.

It is only for Delphi XE (and up) under Win32 by now, but contributors are welcome!
It is used in production since more than half a year, and it passed all FastcodeMM benchmark tests.

If you want a direct link of the today's source code, without SVN, you may try this direct link from our site.
(but it probably will never be updated - you are warned)

Continue reading...

2013, Sunday February 3

Log to the console

Our framework features an integrated logging class, ready to be enabled for support and statistics.

For debugging purposes, it could be very handy to output the logging content to a console window.
It enables interactive debugging of a Client-Server process, for instance: you can interact with the Client, then look in real time at the server console window, and inspect which requests are processed, without the need to open the log file.

Depending on the events, colors will be used to write the corresponding information. Errors will be displayed as light red, for instance.

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2011, Saturday August 20

Enhanced Log viewer

We already shipped a sophisticated set of logging classes some month ago.

Since then, its features have been enhanced, and the system has been deeply interfaced with our main ORM framework. Now almost all low-level or high-level operations can be logged on request.

But since the log files tend to be huge (for instance, if you set the logging for our unitary tests, the 6,000,000 unitary tests creates a 280 MB log file), a log viewer was definitively in need.

Continue reading...

2011, Thursday April 14

Enhanced logging in SynCommons

Logging is everything... unless you never wrote a bug in your program! :)

Let us introduce a new logging class:

  • logging with a set of levels;
  • fast, low execution overhead;
  • can load .map file symbols to be used in logging;
  • compression of .map into binary .mab (900 KB -> 70 KB);
  • inclusion of the .map/.mab into the .exe;
  • reading of an external .map to add unit names and line numbers to a log file without .map available information at execution;
  • exception logging (Delphi or low-level exceptions) with unit names and line numbers;
  • optional stack trace with units and line numbers;
  • methods or procedure recursive tracing, with Enter and auto-Leave;
  • high resolution time stamps, for customer-side profiling of the application execution;
  • set / enumerates / TList / TPersistent / TObjectList / TContainer / dynamic array JSON serialization;
  • per-thread or global logging;
  • multiple log files on the same process;
  • integrated log archival (in zip or any other format);
  • Open Source, works from Delphi 6 up to XE.

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