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lib: picolibc: Use smaller default heap size

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The picolibc heap size configuration (`CONFIG_PICOLIBC_HEAP_SIZE`) is
used to set the statically allocated malloc heap size when userspace is
enabled.

The current default heap size of 1048576 bytes (MMU) and 65536 bytes
(MPU) is too large for most platforms that Zephyr supports and may
result in the picolibc tests being filtered out due to the increased
memory footprint of the compiled image (i.e. SRAM overflow).

This commit updates the default picolibc heap size to a more reasonable
16384 bytes for MMU platforms and 1024 bytes for MPU platforms.

Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
This commit is contained in:
Stephanos Ioannidis 2022-09-30 20:48:23 +09:00 committed by Fabio Baltieri
parent bde86849fc
commit 175cc385c4
1 changed files with 2 additions and 2 deletions
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4
lib/libc/picolibc/Kconfig
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@ -10,8 +10,8 @@ config PICOLIBC_USE_MODULE
config PICOLIBC_HEAP_SIZE
int "Picolibc heap size (bytes)"
default 1048576 if MMU
default 65536 if USERSPACE && MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
default 16384 if MMU
default 1024 if USERSPACE && MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
default -1
help
Indicates the amount of memory which will be used by the picolibc