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[config] set message buffer size based on CPU word length (#4049)

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Message buffers store pointers which have different sizes on different
system. Setting message buffer size according to the CPU word length
so that message buffer size will be doubled on 64bit system compared
to that on 32bit system. As a result, the first message always have
some bytes left for small packets.
This commit is contained in:
Yakun Xu
2019-08-01 10:32:05 -07:00
committed by Jonathan Hui
parent 31ce3d45c8
commit 8782bf8b3e
1 changed files with 7 additions and 1 deletions
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src/core/config/openthread-core-default-config.h
+7 -1
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@@ -170,9 +170,15 @@
*
* The size of a message buffer in bytes.
*
* Message buffers store pointers which have different sizes on different
* system. Setting message buffer size according to the CPU word length
* so that message buffer size will be doubled on 64bit system compared
* to that on 32bit system. As a result, the first message always have some
* bytes left for small packets.
*
*/
#ifndef OPENTHREAD_CONFIG_MESSAGE_BUFFER_SIZE
#define OPENTHREAD_CONFIG_MESSAGE_BUFFER_SIZE 128
#define OPENTHREAD_CONFIG_MESSAGE_BUFFER_SIZE (sizeof(void *) * 32)
#endif
/**