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Aquaria/ExternalLibs/iprof/prof_process.c

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#include <math.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "prof.h"
#include "prof_internal.h"
// whether zone-self-data is kept to allow the history graph
#define Prof_ZONE_HISTORY
// whether full detailed (and large)
#define Prof_CALL_HISTORY
// number of frames of history to keep
#define NUM_FRAME_SLOTS 128
// number of unique zones allowed in the entire application
// @TODO: remove MAX_PROFILING_ZONES and make it dynamic
#define MAX_PROFILING_ZONES 512
////////////////////////////////////////////////////////////////////////
// the number of moving averages
#define NUM_PROFILE_TRACKER_HISTORY_SLOTS 3
// the number of frames to ignore before starting the moving averages
#define NUM_THROWAWAY_UPDATES 3
// threshhold for a moving average of an integer to be at zero
#define INT_ZERO_THRESHHOLD 0.25
Prof_Zone *Prof_zones[MAX_PROFILING_ZONES];
#ifdef Prof_ZONE_HISTORY
static float zone_history[MAX_PROFILING_ZONES][NUM_FRAME_SLOTS]; // 256K
#endif
// these structures are used solely to track data over time
typedef struct
{
double values[NUM_PROFILE_TRACKER_HISTORY_SLOTS];
double variances[NUM_PROFILE_TRACKER_HISTORY_SLOTS];
#ifdef Prof_CALL_HISTORY
float history[NUM_FRAME_SLOTS];
#endif
} History_Scalar;
typedef struct
{
History_Scalar self_time;
History_Scalar hierarchical_time;
History_Scalar entry_count;
int max_recursion;
} Profile_Tracker_Data_Record;
static History_Scalar frame_time;
static double times_to_reach_90_percent[NUM_PROFILE_TRACKER_HISTORY_SLOTS];
static double precomputed_factors [NUM_PROFILE_TRACKER_HISTORY_SLOTS];
static int num_active_zones;
static int update_index; // 2^31 at 100fps = 280 days
static double last_update_time;
static Prof_Report_Mode displayed_quantity;
#define FRAME_TIME_INITIAL 0.001
static int history_index;
static int display_frame;
static int slot = 1;
static void clear(History_Scalar *s)
{
int i;
for (i = 0; i < NUM_PROFILE_TRACKER_HISTORY_SLOTS; i++) {
s->values[i] = 0;
s->variances[i] = 0;
}
}
static void update(History_Scalar *s, double new_value, double *k_array)
{
int i;
double new_variance = new_value * new_value;
for (i = 0; i < NUM_PROFILE_TRACKER_HISTORY_SLOTS; i++) {
double k = k_array[i];
s->values[i] = s->values[i] * k + new_value * (1 - k);
s->variances[i] = s->variances[i] * k + new_variance * (1 - k);
}
#ifdef Prof_CALL_HISTORY
s->history[history_index] = (float) new_value;
#endif
}
static void eternity_set(History_Scalar *s, double new_value)
{
double new_variance = new_value * new_value;
int i;
for (i = 0; i < NUM_PROFILE_TRACKER_HISTORY_SLOTS; i++) {
s->values[i] = new_value;
s->variances[i] = new_variance;
}
#ifdef Prof_CALL_HISTORY
s->history[history_index] = (float) new_value;
#endif
}
static double get_value(History_Scalar *s)
{
#ifdef Prof_CALL_HISTORY
if (display_frame) {
return s->history[(history_index - display_frame + NUM_FRAME_SLOTS) % NUM_FRAME_SLOTS];
}
#endif
return s->values[slot];
}
void Prof_init_highlevel()
{
int j;
update_index = 0;
last_update_time = 0;
times_to_reach_90_percent[0] = 0.1f;
times_to_reach_90_percent[1] = 0.8f;
times_to_reach_90_percent[2] = 2.5f;
displayed_quantity = Prof_SELF_TIME;
clear(&frame_time);
for (j = 0; j < NUM_PROFILE_TRACKER_HISTORY_SLOTS; j++) {
frame_time.values[j] = FRAME_TIME_INITIAL;
}
}
#ifdef Prof_ENABLED
static Prof_Zone *expand = &Prof_region__global;
#else
static Prof_Zone *expand = NULL;
#endif
Prof_extern_C void Prof_set_report_mode(Prof_Report_Mode desired)
{
displayed_quantity = desired;
}
// visit all Prof_Zone_Stacks
extern void Prof_traverse(void (*func)(Prof_Zone_Stack *c));
static void propogate_stack(Prof_Zone_Stack *c)
{
Prof_Zone_Stack *p = c;
// propogate times up the stack for hierarchical
// times, but watch out for recursion
while (p->zone) {
if (!p->zone->visited) {
p->total_hier_ticks += c->total_self_ticks;
p->zone->visited = 1;
}
p = p->parent;
}
p = c;
while (p->zone) {
p->zone->visited = 0;
p = p->parent;
}
}
static void clear_stack(Prof_Zone_Stack *c)
{
c->total_hier_ticks = 0;
c->total_self_ticks = 0;
c->total_entry_count = 0;
}
static double sum;
static void sum_times(Prof_Zone_Stack *c)
{
sum += c->total_self_ticks;
}
static double timestamps_to_seconds;
static void update_history(Prof_Zone_Stack *c)
{
double self_time, hier_time, entry_count;
Profile_Tracker_Data_Record *record = (Profile_Tracker_Data_Record *) c->highlevel;
Prof_Zone *z = c->zone;
if (record == NULL) {
record = (Profile_Tracker_Data_Record *) malloc(sizeof(*record));
c->highlevel = (void *) record;
clear(&record->entry_count);
clear(&record->self_time);
clear(&record->hierarchical_time);
record->max_recursion = 0;
}
if (c->recursion_depth > record->max_recursion)
record->max_recursion = c->recursion_depth;
self_time = c->total_self_ticks * timestamps_to_seconds;
hier_time = c->total_hier_ticks * timestamps_to_seconds;
entry_count = c->total_entry_count;
if (update_index < NUM_THROWAWAY_UPDATES) {
eternity_set(&record->entry_count, entry_count);
eternity_set(&record->self_time, self_time);
eternity_set(&record->hierarchical_time, hier_time);
} else {
update(&record->self_time, self_time, precomputed_factors);
update(&record->hierarchical_time, hier_time, precomputed_factors);
update(&record->entry_count, entry_count, precomputed_factors);
}
#ifdef Prof_ZONE_HISTORY
* ((float *) z->highlevel) += (float) self_time;
#endif
}
const double SPEEDSTEP_DETECTION_RATIO = 0.08;
static int speedstep_warning;
Prof_extern_C void Prof_update(int record_data)
{
#ifdef Prof_ENABLED
Prof_Begin(iprof_update)
static History_Scalar integer_timestamps_per_second;
static Prof_Int64 last_integer_timestamp;
static Prof_Int64 current_integer_timestamp;
int i;
double now, dt;
Prof_Int64 timestamp_delta;
double timestamps_per_second;
assert(Prof_num_zones <= MAX_PROFILING_ZONES);
Prof_traverse(propogate_stack);
// Precompute the time factors
now = Prof_get_time();
if (update_index == 0) {
dt = FRAME_TIME_INITIAL;
} else {
dt = now - last_update_time;
if (dt == 0) dt = FRAME_TIME_INITIAL;
}
last_update_time = now;
for (i = 0; i < NUM_PROFILE_TRACKER_HISTORY_SLOTS; i++) {
precomputed_factors[i] = pow(0.1f, dt / times_to_reach_90_percent[i]);
}
precomputed_factors[0] = 0; // instantaneous.
Prof_get_timestamp(&current_integer_timestamp);
if (update_index == 0) {
sum = 0;
Prof_traverse(sum_times);
if (sum == 0) sum = 1;
timestamp_delta = (Prof_Int64) sum;
} else {
timestamp_delta = current_integer_timestamp - last_integer_timestamp;
if (timestamp_delta == 0) timestamp_delta = 1;
}
last_integer_timestamp = current_integer_timestamp;
timestamps_per_second = (double) timestamp_delta / dt;
if (update_index < NUM_THROWAWAY_UPDATES) {
eternity_set(&integer_timestamps_per_second, timestamps_per_second);
} else {
update(&integer_timestamps_per_second, timestamps_per_second, precomputed_factors);
}
{
const int ss_slot = 1;
double ss_val, ss_variance, ss_stdev, ss_ratio;
ss_val = integer_timestamps_per_second.values[ss_slot];
ss_variance = integer_timestamps_per_second.variances[ss_slot] - ss_val*ss_val;
ss_stdev = sqrt(fabs(ss_variance));
ss_ratio;
if (ss_val) {
ss_ratio = ss_stdev / fabs(ss_val);
} else {
ss_ratio = 0;
}
speedstep_warning = (ss_ratio > SPEEDSTEP_DETECTION_RATIO);
}
if (!record_data) {
Prof_traverse(clear_stack);
Prof_End
return;
}
if (timestamps_per_second) {
timestamps_to_seconds = 1.0 / timestamps_per_second;
} else {
timestamps_to_seconds = 0;
}
#ifdef Prof_ZONE_HISTORY
for (i=0; i < Prof_num_zones; ++i) {
Prof_zones[i]->highlevel = (void *) &zone_history[i][history_index];
zone_history[i][history_index] = 0;
}
#endif
Prof_traverse(update_history);
update(&frame_time, dt, precomputed_factors);
++update_index;
history_index = (history_index + 1) % NUM_FRAME_SLOTS;
Prof_traverse(clear_stack);
Prof_End
#endif // Prof_ENABLED
}
static Prof_Report *allocate_buffer(int n)
{
int i;
Prof_Report *pob = (Prof_Report *) malloc(sizeof(*pob));
pob->num_record = n;
pob->record = (Prof_Report_Record *) malloc(sizeof(*pob->record) * pob->num_record);
pob->title[0] = pob->title[1] = NULL;
for (i=0; i < NUM_TITLE; ++i)
pob->title[i] = NULL;
for (i=0; i < NUM_HEADER; ++i)
pob->header[i] = NULL;
for (i=0; i < n; ++i) {
pob->record[i].values[0] = 0;
pob->record[i].values[1] = 0;
pob->record[i].values[2] = 0;
pob->record[i].values[3] = 0;
pob->record[i].value_flag = 0;
pob->record[i].heat = 0;
pob->record[i].indent = 0;
pob->record[i].number = 0;
}
return pob;
}
static int uncounted;
static Prof_Recursion_Mode recurse = Prof_FLATTEN_RECURSION;
static void propogate_to_zone(Prof_Zone_Stack *c)
{
Prof_Zone *z = c->zone;
Profile_Tracker_Data_Record *d = (Profile_Tracker_Data_Record *) c->highlevel;
Prof_Report_Record *r;
#if 1
r = (Prof_Report_Record *) z->highlevel;
#else
if (recurse == Prof_FLATTEN_RECURSION)
r = (Prof_Report_Record *) z->highlevel;
else
r = ((Prof_Report_Record **) z->highlevel)[c->recursion_depth];
#endif
if (d) {
double t;
r->values[0] += 1000 * get_value(&d->self_time);
r->values[1] += 1000 * get_value(&d->hierarchical_time);
r->values[2] += get_value(&d->entry_count);
// arbitrary determination for how low a moving average
// has to go to reach 0
if (get_value(&d->entry_count) > INT_ZERO_THRESHHOLD) {
if (d->max_recursion > r->number)
r->number = d->max_recursion;
if (c->parent->zone)
((Prof_Report_Record *) c->parent->zone->highlevel)->prefix = '+';
}
#ifdef Prof_CALL_HISTORY
if (display_frame) return; // no variances when examining history
#endif
if (displayed_quantity == Prof_HIERARCHICAL_TIME) {
t = d->hierarchical_time.variances[slot];
} else {
t = d->self_time.variances[slot];
}
t = 1000 * 1000 * t;
if (r->heat == 0)
r->heat = t;
else
r->heat = r->heat + t + 2 * sqrt(r->heat * t);
} else {
++uncounted;
}
}
static void propogate_expanded(Prof_Zone_Stack *c)
{
Profile_Tracker_Data_Record *d = (Profile_Tracker_Data_Record *) c->highlevel;
if (d == NULL) {
++uncounted;
return;
}
if (c->parent->zone && get_value(&d->entry_count) > INT_ZERO_THRESHHOLD) {
((Prof_Report_Record *) c->parent->zone->highlevel)[0].prefix = '+';
((Prof_Report_Record *) c->parent->zone->highlevel)[1].prefix = '+';
((Prof_Report_Record *) c->parent->zone->highlevel)[2].prefix = '+';
}
if (c->zone == expand) {
Prof_Report_Record *r = (Prof_Report_Record *) expand->highlevel;
// accumulate this time to ourselves
r[2].values[0] += 1000 * get_value(&d->self_time);
r[2].values[1] += 1000 * get_value(&d->hierarchical_time);
r[2].values[2] += get_value(&d->entry_count);
if (d->max_recursion > r[2].number && get_value(&d->entry_count) > INT_ZERO_THRESHHOLD)
r[2].number = d->max_recursion;
// propogate it to the parents
if (c->parent->zone) {
r = (Prof_Report_Record *) c->parent->zone->highlevel;
r[1].values[0] += 1000 * get_value(&d->self_time);
r[1].values[1] += 1000 * get_value(&d->hierarchical_time);
r[1].values[2] += get_value(&d->entry_count);
d = (Profile_Tracker_Data_Record *) c->parent->highlevel;
if (d->max_recursion > r[1].number && get_value(&d->entry_count) > INT_ZERO_THRESHHOLD)
r[1].number = d->max_recursion;
}
}
if (c->parent->zone == expand) {
Prof_Report_Record *r = (Prof_Report_Record *) c->zone->highlevel;
r[0].values[0] += 1000 * get_value(&d->self_time);
r[0].values[1] += 1000 * get_value(&d->hierarchical_time);
r[0].values[2] += get_value(&d->entry_count);
if (d->max_recursion > r[0].number && get_value(&d->entry_count) > INT_ZERO_THRESHHOLD)
r[0].number = d->max_recursion;
}
}
static double compute_heat(double variance, double value)
{
double factor, stdev;
double fabs_value = fabs(value);
const float VARIANCE_TOLERANCE_FACTOR = 0.5f;
variance = variance - value*value;
if (variance < 0) variance = 0;
stdev = sqrt(variance);
if (fabs_value < 0.000001) {
return 0;
} else {
factor = (stdev / fabs_value) * (1.0f / VARIANCE_TOLERANCE_FACTOR);
}
if (factor < 0) return 0;
if (factor > 1) return 1;
return factor;
}
static int pob_compare(const void *p, const void *q)
{
double a = ((Prof_Report_Record *) p)->values[0];
double b = ((Prof_Report_Record *) q)->values[0];
return (b < a) ? -1 : (b > a);
}
static int pob_expand_compare(const void *p, const void *q)
{
Prof_Report_Record * a = (Prof_Report_Record *) p;
Prof_Report_Record * b = (Prof_Report_Record *) q;
if (a->indent != b->indent) {
if (a->indent == 5) return -1;
if (b->indent == 5) return 1;
if (a->indent == 3) return 1;
if (b->indent == 3) return -1;
return 0;
}
if (a->values[1] == b->values[1])
return 0;
if (a->values[1] < b->values[1]) {
if (a->indent == 5) return -1;
return 1;
}
if (a->indent == 5) return 1;
return -1;
}
static int cursor;
static int update_cursor;
Prof_Report *Prof_create_report(void)
{
double avg_frame_time,fps;
char *displayed_quantity_name;
int i,s;
Prof_Report *pob;
if (displayed_quantity == Prof_CALL_GRAPH)
s = 3;
else
s = 1;
pob = allocate_buffer(Prof_num_zones * s);
for (i=0; i < Prof_num_zones; ++i) {
Prof_Zone *z = Prof_zones[i];
Prof_Report_Record *r = &pob->record[i*s];
z->highlevel = (void *) r;
if (displayed_quantity == Prof_CALL_GRAPH) {
r[0].name = r[1].name = r[2].name = z->name;
r[0].value_flag = 1 | 2 | 4;
r[1].value_flag = 1 | 2 | 4;
r[2].value_flag = 1 | 2 | 4;
r[0].indent = 3;
r[1].indent = 5;
r[2].indent = 0;
r[0].zone = r[1].zone = r[2].zone = (void *) z;
r[0].prefix = r[1].prefix = r[2].prefix = 0;
} else {
r->value_flag = 1 | 2 | 4;
r->name = z->name;
r->zone = (void *) z;
r->indent = 0;
r->prefix = 0;
}
}
avg_frame_time = frame_time.values[slot];
if (avg_frame_time == 0) avg_frame_time = 0.01f;
fps = 1.0f / avg_frame_time;
displayed_quantity_name = "*error*";
switch (displayed_quantity) {
case Prof_SELF_TIME:
displayed_quantity_name = "sort self";
break;
case Prof_HIERARCHICAL_TIME:
displayed_quantity_name = "sort hier";
break;
case Prof_CALL_GRAPH:
displayed_quantity_name = "sort hier";
break;
}
pob->title[0] = (char *) malloc(BUFSIZ);
sprintf(pob->title[0],
"%3.3lf ms/frame (fps: %3.2lf) %s",
avg_frame_time * 1000, fps, displayed_quantity_name);
#ifdef Prof_CALL_HISTORY
if (display_frame) {
sprintf(pob->title[0] + strlen(pob->title[0]), " - %d frame%s ago",
display_frame, display_frame == 1 ? "" : "s");
} else {
strcat(pob->title[0], " - current frame");
}
#endif
if (speedstep_warning)
pob->title[1] = _strdup("WARNING: SpeedStep-like timer inconsistencies detected. Results are unreliable!");
if (displayed_quantity == Prof_CALL_GRAPH) {
Prof_Report_Record *r = (Prof_Report_Record *) expand->highlevel;
int j=0;
Prof_traverse(propogate_expanded);
r[2].prefix = '-';
for (i=0; i < pob->num_record; ++i) {
if (pob->record[i].values[0] || pob->record[i].values[1] || pob->record[i].values[2]) {
pob->record[j] = pob->record[i];
++j;
}
}
pob->num_record = j;
qsort(pob->record, pob->num_record, sizeof(pob->record[0]), pob_expand_compare);
for (i=0; i < pob->num_record; ++i)
if (pob->record[i].indent == 5)
pob->record[i].indent = 3;
} else {
uncounted = 0;
Prof_traverse(propogate_to_zone);
for (i=0; i < Prof_num_zones; ++i) {
if (displayed_quantity == Prof_HIERARCHICAL_TIME) {
double t = pob->record[i].values[0];
pob->record[i].values[0] = pob->record[i].values[1];
pob->record[i].values[1] = t;
}
pob->record[i].heat = compute_heat(pob->record[i].heat, pob->record[i].values[0]);
}
qsort(pob->record, pob->num_record, sizeof(pob->record[0]), pob_compare);
}
if (update_cursor) {
for (i=0; i < pob->num_record; ++i) {
if (pob->record[i].zone == expand) {
cursor = i;
break;
}
}
update_cursor = 0;
}
pob->header[0] = _strdup("zone");
if (displayed_quantity == Prof_HIERARCHICAL_TIME) {
pob->header[1] = _strdup("hier");
pob->header[2] = _strdup("self");
} else {
pob->header[1] = _strdup("self");
pob->header[2] = _strdup("hier");
}
pob->header[3] = _strdup("count");
if (cursor < 0) cursor = 0;
if (cursor >= pob->num_record) cursor = pob->num_record-1;
pob->hilight = cursor;
return pob;
}
void Prof_free_report(Prof_Report *z)
{
int i;
for (i=0; i < NUM_TITLE; ++i)
if (z->title[i])
free(z->title[i]);
for (i=0; i < NUM_HEADER; ++i)
if (z->header[i])
free(z->header[i]);
free(z->record);
free(z);
}
Prof_extern_C void Prof_move_cursor(int num)
{
cursor += num;
}
Prof_extern_C void Prof_set_cursor(int num)
{
cursor = num;
}
Prof_extern_C void Prof_select(void)
{
Prof_Report *b = Prof_create_report();
if (b->hilight >= 0) {
void *z = b->record[b->hilight].zone;
if (z != NULL) {
expand = (Prof_Zone *) z;
displayed_quantity = Prof_CALL_GRAPH;
}
}
Prof_free_report(b);
update_cursor = 1;
}
Prof_extern_C void Prof_select_parent(void)
{
int i;
void *old = (void *) expand;
Prof_Report *b = Prof_create_report();
for (i=0; i < b->num_record; ++i) {
if (b->record[i].indent == 0) break;
if (b->record[i].zone == old) continue;
expand = (Prof_Zone *) b->record[i].zone;
}
Prof_free_report(b);
update_cursor = 1;
}
Prof_extern_C void Prof_set_frame(int num)
{
if (num < 0) num = 0;
if (num >= NUM_FRAME_SLOTS) num = NUM_FRAME_SLOTS-1;
display_frame = num;
}
Prof_extern_C void Prof_move_frame(int delta)
{
// convert so negative delta = "into the past"
Prof_set_frame(display_frame - delta);
}
Prof_extern_C void Prof_set_smoothing(int x)
{
if (x <= 0) x = 0;
if (x >= NUM_PROFILE_TRACKER_HISTORY_SLOTS)
x = NUM_PROFILE_TRACKER_HISTORY_SLOTS-1;
slot = x;
}
// currently does nothing
Prof_extern_C void Prof_set_recursion(Prof_Recursion_Mode e)
{
recurse = e;
}
static int id(Prof_Zone *z)
{
// hash the string so that the id is consistent from
// run to run (rather than using the pointer itself which isn't)
// @TODO: only compute this at zone init time?
unsigned int h = 0x55555555;
char *n = z->name;
while (*n)
h = (h << 5) + (h >> 27) + *n++;
return h;
}
void Prof_graph(int num_frames, void (*callback)(int id, int x0, int x1, float *values, void *data), void *data)
{
#ifdef Prof_ZONE_HISTORY
int i,h = history_index;
if (num_frames > NUM_FRAME_SLOTS)
num_frames = NUM_FRAME_SLOTS;
for (i=0; i < Prof_num_zones; ++i) {
if (h >= num_frames) {
callback(id(Prof_zones[i]), 0, num_frames, &zone_history[i][h-num_frames], data);
} else {
callback(id(Prof_zones[i]), num_frames - h, num_frames, &zone_history[i][0], data);
callback(id(Prof_zones[i]), 0, num_frames-h, &zone_history[i][NUM_FRAME_SLOTS-(num_frames-h)], data);
}
}
// display frame "cursor"
if (display_frame != 0) {
float value[2] = { 2.0, 0 };
callback(0, NUM_FRAME_SLOTS-1-display_frame, NUM_FRAME_SLOTS-1-display_frame, value, data);
}
#endif
}
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