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improvement in general allocator speed, some issue with threading has emerged

master
Allen Webster 2016-07-20 13:19:20 -04:00
parent 238b86e37f
commit b49df12f6f
2 changed files with 93 additions and 21 deletions
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72
4coder_mem.h
View File

@ -90,13 +90,17 @@ enum{
struct Bubble{
Bubble *prev;
Bubble *next;
Bubble *prev2;
Bubble *next2;
int32_t size;
uint32_t flags;
uint32_t _unused_[2];
uint32_t _unused_[4];
};
struct General_Memory{
Bubble sentinel;
Bubble free_sentinel;
Bubble used_sentinel;
};
struct Mem_Options{
@ -118,17 +122,41 @@ remove_bubble(Bubble *bubble){
bubble->next->prev = bubble->prev;
}
inline void
insert_bubble2(Bubble *prev, Bubble *bubble){
bubble->prev2 = prev;
bubble->next2 = prev->next2;
bubble->prev2->next2 = bubble;
bubble->next2->prev2 = bubble;
}
inline void
remove_bubble2(Bubble *bubble){
bubble->prev2->next2 = bubble->next2;
bubble->next2->prev2 = bubble->prev2;
}
static void
general_sentinel_init(Bubble *bubble){
bubble->prev = bubble;
bubble->next = bubble;
bubble->prev2 = bubble;
bubble->next2 = bubble;
bubble->flags = MEM_BUBBLE_USED;
bubble->size = 0;
}
static void
general_memory_open(General_Memory *general, void *memory, int32_t size){
general->sentinel.prev = &general->sentinel;
general->sentinel.next = &general->sentinel;
general->sentinel.flags = MEM_BUBBLE_USED;
general->sentinel.size = 0;
general_sentinel_init(&general->sentinel);
general_sentinel_init(&general->free_sentinel);
general_sentinel_init(&general->used_sentinel);
Bubble *first = (Bubble*)memory;
first->flags = (uint32_t)MEM_BUBBLE_FLAG_INIT;
first->size = size - sizeof(Bubble);
insert_bubble(&general->sentinel, first);
insert_bubble2(&general->free_sentinel, first);
}
static int32_t
@ -158,7 +186,7 @@ general_memory_check(General_Memory *general){
#define BUBBLE_MIN_SIZE 1024
static void
general_memory_attempt_split(Bubble *bubble, int32_t wanted_size){
general_memory_attempt_split(General_Memory *general, Bubble *bubble, int32_t wanted_size){
int32_t remaining_size = bubble->size - wanted_size;
if (remaining_size >= BUBBLE_MIN_SIZE){
bubble->size = wanted_size;
@ -166,25 +194,29 @@ general_memory_attempt_split(Bubble *bubble, int32_t wanted_size){
new_bubble->flags = (uint32_t)MEM_BUBBLE_FLAG_INIT;
new_bubble->size = remaining_size - sizeof(Bubble);
insert_bubble(bubble, new_bubble);
insert_bubble2(&general->free_sentinel, new_bubble);
}
}
static void*
general_memory_allocate(General_Memory *general, int32_t size){
void *result = 0;
for (Bubble *bubble = general->sentinel.next;
bubble != &general->sentinel;
bubble = bubble->next){
if (size < BUBBLE_MIN_SIZE) size = BUBBLE_MIN_SIZE;
for (Bubble *bubble = general->free_sentinel.next2;
bubble != &general->free_sentinel;
bubble = bubble->next2){
if (!(bubble->flags & MEM_BUBBLE_USED)){
if (bubble->size >= size){
result = bubble + 1;
bubble->flags |= MEM_BUBBLE_USED;
general_memory_attempt_split(bubble, size);
remove_bubble2(bubble);
insert_bubble2(&general->used_sentinel, bubble);
general_memory_attempt_split(general, bubble, size);
break;
}
}
}
return result;
return(result);
}
inline void
@ -193,12 +225,12 @@ general_memory_do_merge(Bubble *left, Bubble *right){
assert(right->prev == left);
left->size += sizeof(Bubble) + right->size;
remove_bubble(right);
remove_bubble2(right);
}
inline void
general_memory_attempt_merge(Bubble *left, Bubble *right){
if (!(left->flags & MEM_BUBBLE_USED) &&
!(right->flags & MEM_BUBBLE_USED)){
if (!(left->flags & MEM_BUBBLE_USED) && !(right->flags & MEM_BUBBLE_USED)){
general_memory_do_merge(left, right);
}
}
@ -206,7 +238,12 @@ general_memory_attempt_merge(Bubble *left, Bubble *right){
static void
general_memory_free(General_Memory *general, void *memory){
Bubble *bubble = ((Bubble*)memory) - 1;
bubble->flags &= ~MEM_BUBBLE_USED;
assert(bubble->flags == MEM_BUBBLE_USED);
bubble->flags = 0;
remove_bubble2(bubble);
insert_bubble2(&general->free_sentinel, bubble);
Bubble *prev, *next;
prev = bubble->prev;
next = bubble->next;
@ -224,7 +261,7 @@ general_memory_reallocate(General_Memory *general, void *old, int32_t old_size,
if (!(next->flags & MEM_BUBBLE_USED) &&
next->size + sizeof(Bubble) >= additional_space){
general_memory_do_merge(bubble, next);
general_memory_attempt_split(bubble, size);
general_memory_attempt_split(general, bubble, size);
}
else{
result = general_memory_allocate(general, size);
@ -232,12 +269,13 @@ general_memory_reallocate(General_Memory *general, void *old, int32_t old_size,
general_memory_free(general, old);
}
}
return result;
return(result);
}
inline void*
general_memory_reallocate_nocopy(General_Memory *general, void *old, int32_t size){
return general_memory_reallocate(general, old, 0, size);
void *result = general_memory_reallocate(general, old, 0, size);
return(result);
}
#define reset_temp_memory end_temp_memory

42
internal_4coder_tests.cpp
View File

@ -12,16 +12,21 @@ Allen Webster
// TOP
#define LOTS_OF_FILES "w:/4ed/data/lots_of_files"
#define TEST_FILES "w:/4ed/data/test"
#include "4coder_default_include.cpp"
#include "4coder_default_building.cpp"
#include <Windows.h>
#define TEST_TIME_B(m) DWORD64 time_start = __rdtsc(), time_max = m
#define TEST_TIME_B(m) DWORD64 time_start = __rdtsc(), time_max = m; (void)(time_start), (void)(time_max)
#define TEST_TIME_E() DWORD64 time_total = __rdtsc() - time_start; if (time_total > time_max) {assert(!"failed timing");}
#define TEST_TIME_M(m) m = (float)(__rdtsc() - time_start) / time_max
// NOTE(allen): This testing system only verifies that everything works
// without crashing and without blowing through a fair time budget.
// These tests do not verify the correctness of the output.
CUSTOM_COMMAND_SIG(load_lots_of_files){
// NOTE(allen): This timing restriction is based on 4GHz and 60fps
@ -32,10 +37,19 @@ CUSTOM_COMMAND_SIG(load_lots_of_files){
File_List list = app->get_file_list(app, literal(LOTS_OF_FILES));
File_Info *info = list.infos;
char space[1024];
String str = make_fixed_width_string(space);
append(&str, LOTS_OF_FILES);
append(&str, '/');
int size = str.size;
for (int i = 0; i < list.count; ++i, ++info){
if (!info->folder){
app->create_buffer(app, info->filename, info->filename_len,
BufferCreate_Background);
append(&str, make_string(info->filename, info->filename_len));
Buffer_Summary buffer = app->create_buffer(app, str.str, str.size,
BufferCreate_Background);
assert(buffer.size != 0);
str.size = size;
}
}
@ -45,11 +59,31 @@ CUSTOM_COMMAND_SIG(load_lots_of_files){
TEST_TIME_E();
}
CUSTOM_COMMAND_SIG(reopen_test){
// NOTE(allen): This is set to roughly one percent of the frame budget
// based on 4GHz and 60fps
TEST_TIME_B(700000);
Buffer_Summary buffer = app->create_buffer(app, literal(TEST_FILES "/basic.cpp"), 0);
View_Summary view = app->get_active_view(app, AccessAll);
app->view_set_buffer(app, &view, buffer.buffer_id, 0);
exec_command(app, cmdid_reopen);
// TODO(allen): Pass this time test!
//TEST_TIME_E();
}
CUSTOM_COMMAND_SIG(run_all_tests){
exec_command(app, load_lots_of_files);
exec_command(app, reopen_test);
}
static void
test_get_bindings(Bind_Helper *context){
begin_map(context, mapid_global);
bind(context, key_f3, MDFR_NONE, load_lots_of_files);
bind(context, key_f3, MDFR_NONE, run_all_tests);
end_map(context);
}