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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/mem.h
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@ -111,6 +111,7 @@ mem_mapping_t bios_high_mapping[8];
extern mem_mapping_t ram_high_mapping;
extern mem_mapping_t ram_remapped_mapping;
#define EVICT_NOT_IN_LIST ((uint32_t)-1)
typedef struct page_t
{
void (*write_b)(uint32_t addr, uint8_t val, struct page_t *p);
@ -125,12 +126,22 @@ typedef struct page_t
uint16_t head;
uint64_t code_present_mask[4], dirty_mask[4];
uint32_t evict_prev, evict_next;
} page_t;
extern page_t *pages;
extern page_t **page_lookup;
extern uint32_t purgable_page_list_head;
static inline int page_in_evict_list(page_t *p)
{
return (p->evict_prev != EVICT_NOT_IN_LIST);
}
void page_remove_from_evict_list(page_t *p);
void page_add_to_evict_list(page_t *p);
uint32_t mmutranslate_noabrt(uint32_t addr, int rw);
extern uint32_t get_phys_virt,get_phys_phys;
static inline uint32_t get_phys(uint32_t addr)
@ -195,4 +206,6 @@ void mmu_invalidate(uint32_t addr);
int loadbios();
extern unsigned char isram[0x10000];
extern int purgeable_page_count;
#endif