chrisbrooks

There's probably a good chance newlib is using dlmalloc, e.g. https://github.com/ARMmbed/dlmalloc/tree/master/source

Thanks!

It's just newlib, whatever version was part of ARM's 11.3.rel1 release. That's the "easy" answer. At the time we did the toolchain update I created these notes with the specific build commands used for the versions ARM didn't supply as compiled...

@jmarsh Thanks for your explanation. Inspired by your comment about mallinfo(), I poked around in "malloc.h" and found another useful function: malloc_trim(). When I call malloc_trim(), my "freeram()" value is always restored to 507904, and my...

Additional details: for my previous results, the Arduino IDE compiler was set to Optimize: "Fast".

I'm seeing some weird behavior when I use malloc/free to work with dynamic memory on my Teensy 4.1. When I free memory, it doesn't always get aggregated with adjacent chunks, which prevents me from allocating a large chunk. Is this expected...