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crocus: optimise bo_unref path a little.

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This just splits it into the atomic/non-atomic paths

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11707>
This commit is contained in:
Dave Airlie 2021-07-05 05:11:26 +10:00
parent a907e29a3e
commit be5bb3146a
2 changed files with 33 additions and 28 deletions
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37
src/gallium/drivers/crocus/crocus_bufmgr.c
View file

@ -115,16 +115,6 @@ get_time(void)
#define FILE_DEBUG_FLAG DEBUG_BUFMGR
static inline int
atomic_add_unless(int *v, int add, int unless)
{
int c, old;
c = p_atomic_read(v);
while (c != unless && (old = p_atomic_cmpxchg(v, c, c + add)) != c)
c = old;
return c == unless;
}
struct bo_cache_bucket {
/** List of cached BOs. */
struct list_head head;
@ -720,28 +710,21 @@ bo_unreference_final(struct crocus_bo *bo, time_t time)
}
void
crocus_bo_unreference(struct crocus_bo *bo)
__crocus_bo_unreference(struct crocus_bo *bo)
{
if (bo == NULL)
return;
struct crocus_bufmgr *bufmgr = bo->bufmgr;
struct timespec time;
assert(p_atomic_read(&bo->refcount) > 0);
clock_gettime(CLOCK_MONOTONIC, &time);
if (atomic_add_unless(&bo->refcount, -1, 1)) {
struct crocus_bufmgr *bufmgr = bo->bufmgr;
struct timespec time;
mtx_lock(&bufmgr->lock);
clock_gettime(CLOCK_MONOTONIC, &time);
mtx_lock(&bufmgr->lock);
if (p_atomic_dec_zero(&bo->refcount)) {
bo_unreference_final(bo, time.tv_sec);
cleanup_bo_cache(bufmgr, time.tv_sec);
}
mtx_unlock(&bufmgr->lock);
if (p_atomic_dec_zero(&bo->refcount)) {
bo_unreference_final(bo, time.tv_sec);
cleanup_bo_cache(bufmgr, time.tv_sec);
}
mtx_unlock(&bufmgr->lock);
}
static void

24
src/gallium/drivers/crocus/crocus_bufmgr.h
View file

@ -186,11 +186,33 @@ crocus_bo_reference(struct crocus_bo *bo)
p_atomic_inc(&bo->refcount);
}
static inline int
atomic_add_unless(int *v, int add, int unless)
{
int c, old;
c = p_atomic_read(v);
while (c != unless && (old = p_atomic_cmpxchg(v, c, c + add)) != c)
c = old;
return c == unless;
}
void __crocus_bo_unreference(struct crocus_bo *bo);
/**
* Releases a reference on a buffer object, freeing the data if
* no references remain.
*/
void crocus_bo_unreference(struct crocus_bo *bo);
static inline void crocus_bo_unreference(struct crocus_bo *bo)
{
if (bo == NULL)
return;
assert(p_atomic_read(&bo->refcount) > 0);
if (atomic_add_unless(&bo->refcount, -1, 1)) {
__crocus_bo_unreference(bo);
}
}
#define MAP_READ PIPE_MAP_READ
#define MAP_WRITE PIPE_MAP_WRITE