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eo - eo ptr lookup - do some prefetches to get some micro-speedups 

prefetching a bit helps.. a bit like 0.2% or so... but it does help. :)
This commit is contained in:
Carsten Haitzler 2016-10-01 23:37:34 +09:00
parent a2d507d3bf
commit 7b3e7ecc1f
2 changed files with 32 additions and 28 deletions
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42
src/lib/eo/eo_ptr_indirection.c
View File

@ -66,7 +66,6 @@ _eo_obj_pointer_get(const Eo_Id obj_id)
{
#ifdef HAVE_EO_ID
_Eo_Id_Entry *entry;
_Eo_Object *ptr;
Generation_Counter generation;
Table_Index mid_table_id, table_id, entry_id;
Eo_Id tag_bit;
@ -77,27 +76,30 @@ _eo_obj_pointer_get(const Eo_Id obj_id)
// NULL objects will just be sensibly ignored. not worth complaining
// every single time.
domain = (obj_id >> SHIFT_DOMAIN) & MASK_DOMAIN;
data = _eo_table_data_get();
EINA_PREFETCH(&(data->tables[0]));
domain = (obj_id >> SHIFT_DOMAIN) & MASK_DOMAIN;
tdata = _eo_table_data_table_get(data, domain);
if (!tdata) goto err;
EINA_PREFETCH(&(tdata->cache.id));
if (EINA_UNLIKELY(!tdata)) goto err;
if (EINA_LIKELY(domain != EFL_ID_DOMAIN_SHARED))
{
if (obj_id == tdata->cache.id)
{
ptr = tdata->cache.object;
return ptr;
}
return tdata->cache.object;
mid_table_id = (obj_id >> SHIFT_MID_TABLE_ID) & MASK_MID_TABLE_ID;
EINA_PREFETCH(&(tdata->eo_ids_tables[mid_table_id]));
table_id = (obj_id >> SHIFT_TABLE_ID) & MASK_TABLE_ID;
entry_id = (obj_id >> SHIFT_ENTRY_ID) & MASK_ENTRY_ID;
generation = obj_id & MASK_GENERATIONS;
// get tag bit to check later down below - pipelining
tag_bit = (obj_id) & MASK_OBJ_TAG;
if (!obj_id) goto err_null;
else if (!tag_bit) goto err;
EO_DECOMPOSE_ID(obj_id, mid_table_id, table_id, entry_id, generation);
// Check the validity of the entry
if (tdata->eo_ids_tables[mid_table_id])
{
@ -111,8 +113,7 @@ _eo_obj_pointer_get(const Eo_Id obj_id)
// Cache the result of that lookup
tdata->cache.object = entry->ptr;
tdata->cache.id = obj_id;
ptr = entry->ptr;
return ptr;
return entry->ptr;
}
}
}
@ -122,18 +123,22 @@ _eo_obj_pointer_get(const Eo_Id obj_id)
{
eina_lock_take(&(_eo_table_data_shared_data->obj_lock));
if (obj_id == tdata->cache.id)
{
ptr = tdata->cache.object;
return ptr;
}
// yes we return keeping the lock locked. thats why
// you must call _eo_obj_pointer_done() wrapped
// by EO_OBJ_DONE() to release
return tdata->cache.object;
mid_table_id = (obj_id >> SHIFT_MID_TABLE_ID) & MASK_MID_TABLE_ID;
EINA_PREFETCH(&(tdata->eo_ids_tables[mid_table_id]));
table_id = (obj_id >> SHIFT_TABLE_ID) & MASK_TABLE_ID;
entry_id = (obj_id >> SHIFT_ENTRY_ID) & MASK_ENTRY_ID;
generation = obj_id & MASK_GENERATIONS;
// get tag bit to check later down below - pipelining
tag_bit = (obj_id) & MASK_OBJ_TAG;
if (!obj_id) goto err_shared_null;
else if (!tag_bit) goto err_shared;
EO_DECOMPOSE_ID(obj_id, mid_table_id, table_id, entry_id, generation);
// Check the validity of the entry
if (tdata->eo_ids_tables[mid_table_id])
{
@ -147,11 +152,10 @@ _eo_obj_pointer_get(const Eo_Id obj_id)
// Cache the result of that lookup
tdata->cache.object = entry->ptr;
tdata->cache.id = obj_id;
ptr = entry->ptr;
// yes we return keeping the lock locked. thats why
// you must call _eo_obj_pointer_done() wrapped
// by EO_OBJ_DONE() to release
return ptr;
return entry->ptr;
}
}
}

18
src/lib/eo/eo_ptr_indirection.x
View File

@ -251,12 +251,6 @@ typedef struct _Eo_Id_Table_Data Eo_Id_Table_Data;
struct _Eo_Id_Table_Data
{
/* Tables handling pointers indirection */
_Eo_Ids_Table **eo_ids_tables[MAX_MID_TABLE_ID];
/* Current table used for following allocations */
_Eo_Ids_Table *current_table;
/* Spare empty table */
_Eo_Ids_Table *empty_table;
/* Cached eoid lookups */
struct
{
@ -267,12 +261,18 @@ struct _Eo_Id_Table_Data
Eina_Bool isa;
}
cache;
/* Next generation to use when assigning a new entry to a Eo pointer */
Generation_Counter generation;
/* Tables handling pointers indirection */
_Eo_Ids_Table **eo_ids_tables[MAX_MID_TABLE_ID];
/* Current table used for following allocations */
_Eo_Ids_Table *current_table;
/* Spare empty table */
_Eo_Ids_Table *empty_table;
/* Optional lock around all objects in eoid table - only used if shared */
Eina_Lock obj_lock;
/* Next generation to use when assigning a new entry to a Eo pointer */
Generation_Counter generation;
/* are we shared so we need lock/unlock? */
Eina_Bool shared : 1;
Eina_Bool shared;
};
struct _Eo_Id_Data