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8Kib may align better with flash blocks than 9KiB

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This commit is contained in:
Jeff Epler 2021-08-25 13:38:39 -05:00
parent 4621cd54fb
commit 7098d4ccd7
1 changed files with 4 additions and 2 deletions
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6
ports/esp32s2/mpconfigport.h
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@ -45,9 +45,11 @@
// 20kB is statically allocated to nvs, but when overwriting an existing // 20kB is statically allocated to nvs, but when overwriting an existing
// item, it's temporarily necessary to store both the old and new copies. // item, it's temporarily necessary to store both the old and new copies.
// Additionally, there is some overhad for the names and values of items // Additionally, there is some overhad for the names and values of items
// in nvs. So, set the size at 9/20ths of the allocated space // in nvs, and alignment to 4kB flash erase boundaries may give better
// performance characteristics (h/t @tannewt). This implies we should select an
// 8kB size for CircuitPython'ns NVM.
#ifndef CIRCUITPY_INTERNAL_NVM_SIZE #ifndef CIRCUITPY_INTERNAL_NVM_SIZE
#define CIRCUITPY_INTERNAL_NVM_SIZE (9 * 1024) #define CIRCUITPY_INTERNAL_NVM_SIZE (8 * 1024)
#endif #endif
#endif // __INCLUDED_ESP32S2_MPCONFIGPORT_H #endif // __INCLUDED_ESP32S2_MPCONFIGPORT_H