embedded memory_error ai_generated true

pvPortMalloc failed: heap fragmentation

ID: embedded/heap-fragmentation

Also available as: JSON · Markdown
78%Fix Rate
82%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
32 active — — —

Root Cause

FreeRTOS heap fragmented, cant allocate despite free memory.

generic

Workarounds

  1. 88% success Use heap_4 or heap_5 with memory pools for fixed-size allocations
  2. 90% success Pre-allocate buffers at init and avoid runtime malloc

Dead Ends

Common approaches that don't work:

  1. Use heap_1 (no free) 72% fail

    Cannot reuse memory

  2. Increase heap size beyond available RAM 85% fail

    Not possible on embedded