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platform: imx: Fix PLATFORM_DCACHE_ALIGN 

At this point PLATFORM_DCACHE_ALIGN is equal with DCACHE_LINE_SIZE
which on i.MX boards is 128.

Functions like rmalloc and rzalloc are allocating memory aligned at
PLATFORM_DCACHE_ALIGN bytes. This means that blocks under 128 bytes
are not really used and blocks sized > 128 are preffered for small
allocations.

This seems to be an unnecessary overhead which results in SOF not
being abel to allocate memory for simple pipelines (e.g simple
pipeline with a mixer).

For this reason, we set PLATFORM_DCACHE_ALIGN to a smaller value
(sizeof(void*)) but keep HEAP_BUF_ALIGNMENT unchanged.

Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
This commit is contained in:
Daniel Baluta 2020-11-11 20:49:50 +02:00 committed by Liam Girdwood
parent 23d1dc005a
commit 8354454b4d
2 changed files with 4 additions and 4 deletions
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4
src/platform/imx8/include/platform/lib/memory.h
View File

@ -14,7 +14,7 @@
/* data cache line alignment */
#define PLATFORM_DCACHE_ALIGN DCACHE_LINE_SIZE
#define PLATFORM_DCACHE_ALIGN sizeof(void *)
/* physical DSP addresses */
@ -171,7 +171,7 @@
#define SOF_MEM_RO_SIZE 0x8
#define HEAP_BUF_ALIGNMENT PLATFORM_DCACHE_ALIGN
#define HEAP_BUF_ALIGNMENT DCACHE_LINE_SIZE
/** \brief EDF task's default stack size in bytes. */
#define PLATFORM_TASK_DEFAULT_STACK_SIZE 3072

4
src/platform/imx8m/include/platform/lib/memory.h
View File

@ -14,7 +14,7 @@
/* data cache line alignment */
#define PLATFORM_DCACHE_ALIGN DCACHE_LINE_SIZE
#define PLATFORM_DCACHE_ALIGN sizeof(void *)
/* physical DSP addresses */
@ -172,7 +172,7 @@
#define SOF_MEM_RO_SIZE 0x8
#define HEAP_BUF_ALIGNMENT PLATFORM_DCACHE_ALIGN
#define HEAP_BUF_ALIGNMENT DCACHE_LINE_SIZE
/** \brief EDF task's default stack size in bytes. */
#define PLATFORM_TASK_DEFAULT_STACK_SIZE 3072