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Maintain a list of free code blocks, and allocate new blocks from the list rather than evicting at random.

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Also maintain a list of memory pages with dirty code blocks that can be evicted. This allows the recompiler to evict dirty blocks in preference to freeing usable blocks when the free list is empty.
Increase the number of available code blocks on x86.
Increase the non-ARM code allocator memory to 128 MB.
This reduces the amount of code block churning when running software with a lot of code, eg Windows XP.
This commit is contained in:
SarahW 2019-01-19 21:54:14 +00:00
commit bf392ffd3a
7 changed files with 189 additions and 44 deletions
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13
src/codegen.h
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@ -29,12 +29,6 @@
same page).
*/
/*Hack until better memory management written*/
/*This is deliberately _not_ a power of two, to avoid cache aliasing problems.
Try changing this to a power of two, and watch the performance plummet :)
It's probably best for this to be a multiple of the cache line size though*/
#define BLOCK_DATA_SIZE 0xff80
typedef struct codeblock_t
{
uint32_t pc;
@ -59,7 +53,7 @@ typedef struct codeblock_t
present in two pages.*/
uint16_t prev, next;
uint16_t prev_2, next_2;
/*First mem_block_t used by this block. Any subsequent mem_block_ts
will be in the list starting at head_mem_block->next.*/
struct mem_block_t *head_mem_block;
@ -77,6 +71,8 @@ extern uint8_t *block_write_data;
#define CODEBLOCK_STATIC_TOP 2
/*Code block has been compiled*/
#define CODEBLOCK_WAS_RECOMPILED 4
/*Code block is in free list and is not valid*/
#define CODEBLOCK_IN_FREE_LIST 8
#define BLOCK_PC_INVALID 0xffffffff
@ -304,9 +300,10 @@ x86seg *codegen_generate_ea(struct ir_data_t *ir, x86seg *op_ea_seg, uint32_t fe
void codegen_check_seg_read(codeblock_t *block, struct ir_data_t *ir, x86seg *seg);
void codegen_check_seg_write(codeblock_t *block, struct ir_data_t *ir, x86seg *seg);
int codegen_purge_purgable_list();
/*Delete a random code block to free memory. This is obviously quite expensive, and
will only be called when the allocator is out of memory*/
void codegen_delete_random_block();
void codegen_delete_random_block(int required_mem_block);
extern int cpu_block_end;
extern uint32_t codegen_endpc;