RUNTIME MEMORY // MEASURED HEADROOM

Stack and heap under observation

Configured stack is shown against maximum observed use.

PQC receiver

21.42%STACK USED

Configured

48KiB

Max observed

10.281KiB

Headroom

78.58%

Post-session heap

79,200B

DTLS receiver

8.94%STACK USED

Configured

64KiB

Max observed

5.72KiB

Headroom

91.06%

DTLS sender

10.84%STACK USED

Configured

48KiB

Max observed

5.2KiB

Headroom

89.16%

Short DTLS characterization: no progressive post-session free-heap depletion was observed. This is not proof that memory leaks are impossible.

EVIDENCE · FROM YOUR LOGS

PQC receiver: free_heap=79200 and stack_hwm=9656 words logged 244 times in pqc-921600-validation/receiver/serial.log (Evidence → VALIDATION RUNS).
DTLS receiver & sender: stack figures come from the DTLS memory characterization; the DTLS 24H logs do not print stack readings.
PQC sender: static RAM 103,652 B (BSS) from the linked firmware; no runtime stack readings were logged for this board.