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RLC optimization - allocate SDU header and SDU data together

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By allocating sdu data and sdu header together the total amount of
free/malloc calls per SDU is reduced by 1 increasing overall performance.
This commit is contained in:
Bartosz Podrygajlo
2024-10-30 16:03:01 +01:00
parent 7ae1aa21f4
commit 54a57bd2d6
1 changed files with 6 additions and 5 deletions
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openair2/LAYER2/nr_rlc/nr_rlc_sdu.c
+6 -5
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@@ -30,7 +30,11 @@ nr_rlc_sdu_segment_t *nr_rlc_new_sdu(
char *buffer, int size,
int upper_layer_id)
{
nr_rlc_sdu_t *sdu = calloc(1, sizeof(nr_rlc_sdu_t));
/* allocate sdu header and data together */
nr_rlc_sdu_t *sdu = malloc(sizeof(nr_rlc_sdu_t) + size);
/* only memset the header */
memset(sdu, 0 , sizeof(*sdu));
nr_rlc_sdu_segment_t *ret = calloc(1, sizeof(nr_rlc_sdu_segment_t));
if (sdu == NULL || ret == NULL)
goto oom;
@@ -38,9 +42,7 @@ nr_rlc_sdu_segment_t *nr_rlc_new_sdu(
sdu->ref_count = 1;
sdu->sn = -1; /* set later */
sdu->upper_layer_id = upper_layer_id;
sdu->data = malloc(size);
if (sdu->data == NULL)
goto oom;
sdu->data = (char*)(sdu + 1);
memcpy(sdu->data, buffer, size);
sdu->size = size;
sdu->retx_count = -1;
@@ -64,7 +66,6 @@ int nr_rlc_free_sdu_segment(nr_rlc_sdu_segment_t *sdu)
sdu->sdu->free_count++;
if (sdu->sdu->free_count == sdu->sdu->ref_count) {
free(sdu->sdu->data);
free(sdu->sdu);
ret = 1;
}