flywithu/ntel-gpu-tools
1
0
Fork 0
mirror of https://github.com/tiagovignatti/intel-gpu-tools.git synced 2025-06-22 23:36:30 +00:00
Code Issues Releases Wiki Activity

stats: Allow the underlying arrays to grow at will

Browse Source 
Chris mentioned he wanted to be able to measure a variable "for one
second" and use igt_stats to store them. That's one case where we don't
know the number of data points upfront.

We should really support that, so here it is.

v2: Just free ->sorted when a new capacity is needed.
    ensure_sorted_values() will then reallocate the array to the new
    capacity on demand (Chris)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
This commit is contained in:
Damien Lespiau 2015-06-27 17:34:51 +01:00
parent 817ea87b6e
commit 00432ff260
1 changed files with 42 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
lib/igt_stats.c
View File

@ -63,6 +63,37 @@
* ]|
*/
static unsigned int get_new_capacity(int need)
{
unsigned int new_capacity;
/* taken from Python's list */
new_capacity = (need >> 6) + (need < 9 ? 3 : 6);
new_capacity += need;
return new_capacity;
}
static void igt_stats_ensure_capacity(igt_stats_t *stats,
unsigned int n_additional_values)
{
unsigned int new_n_values = stats->n_values + n_additional_values;
unsigned int new_capacity;
if (new_n_values <= stats->capacity)
return;
new_capacity = get_new_capacity(new_n_values);
stats->values = realloc(stats->values,
sizeof(*stats->values) * new_capacity);
igt_assert(stats->values);
stats->capacity = new_capacity;
free(stats->sorted);
stats->sorted = NULL;
}
/**
* igt_stats_init:
* @stats: An #igt_stats_t instance
@ -78,9 +109,7 @@ void igt_stats_init(igt_stats_t *stats, unsigned int capacity)
{
memset(stats, 0, sizeof(*stats));
stats->values = calloc(capacity, sizeof(*stats->values));
igt_assert(stats->values);
stats->capacity = capacity;
igt_stats_ensure_capacity(stats, capacity);
stats->min = U64_MAX;
stats->max = 0;
@ -156,7 +185,8 @@ void igt_stats_set_population(igt_stats_t *stats, bool full_population)
*/
void igt_stats_push(igt_stats_t *stats, uint64_t value)
{
igt_assert(stats->n_values < stats->capacity);
igt_stats_ensure_capacity(stats, 1);
stats->values[stats->n_values++] = value;
stats->mean_variance_valid = false;
@ -181,6 +211,8 @@ void igt_stats_push_array(igt_stats_t *stats,
{
unsigned int i;
igt_stats_ensure_capacity(stats, n_values);
for (i = 0; i < n_values; i++)
igt_stats_push(stats, values[i]);
}
@ -240,6 +272,12 @@ static void igt_stats_ensure_sorted_values(igt_stats_t *stats)
return;
if (!stats->sorted) {
/*
* igt_stats_ensure_capacity() will free ->sorted when the
* capacity increases, which also correspond to an invalidation
* of the sorted array. We'll then reallocate it here on
* demand.
*/
stats->sorted = calloc(stats->capacity, sizeof(*stats->values));
igt_assert(stats->sorted);
}