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QUIC: packet based bytes_in_flight accounting.

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A packet size is kept in one of the frames belonging to the packet.
This commit is contained in:
Sergey Kandaurov 2020-08-14 16:54:13 +03:00
parent 81e9a5d77c
commit 6e17937db4
2 changed files with 30 additions and 9 deletions
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38
src/event/ngx_event_quic.c
View File

@ -288,7 +288,8 @@ static void ngx_quic_free_frame(ngx_connection_t *c, ngx_quic_frame_t *frame);
static void ngx_quic_congestion_ack(ngx_connection_t *c,
ngx_quic_frame_t *frame);
static void ngx_quic_congestion_lost(ngx_connection_t *c, ngx_msec_t sent);
static void ngx_quic_congestion_lost(ngx_connection_t *c,
ngx_quic_frame_t *frame);
static SSL_QUIC_METHOD quic_method = {
@ -3627,9 +3628,11 @@ ngx_quic_send_frames(ngx_connection_t *c, ngx_quic_send_ctx_t *ctx,
ngx_del_timer(&qc->pto);
}
ngx_add_timer(&qc->pto, ngx_quic_pto(c, ctx));
start->plen = len;
}
qc->congestion.in_flight += out.len;
qc->congestion.in_flight += len;
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion send if:%uz",
@ -3783,12 +3786,11 @@ ngx_quic_detect_lost(ngx_connection_t *c, ngx_uint_t ack)
q = ngx_queue_next(q);
ngx_queue_remove(&f->queue);
qc->congestion.in_flight -= f->len;
ngx_queue_insert_tail(&range, &f->queue);
} while (q != ngx_queue_sentinel(&ctx->sent));
ngx_quic_congestion_lost(c, start->last);
ngx_quic_congestion_lost(c, start);
if (ngx_quic_send_frames(c, ctx, &range) != NGX_OK) {
return NGX_ERROR;
@ -4535,26 +4537,34 @@ ngx_quic_congestion_ack(ngx_connection_t *c, ngx_quic_frame_t *f)
ngx_quic_congestion_t *cg;
ngx_quic_connection_t *qc;
if (f->plen == 0) {
return;
}
qc = c->quic;
cg = &qc->congestion;
cg->in_flight -= f->len;
cg->in_flight -= f->plen;
timer = f->last - cg->recovery_start;
if ((ngx_msec_int_t) timer <= 0) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion ack recovery win:%uz, ss:%uz, if:%uz",
cg->window, cg->ssthresh, cg->in_flight);
return;
}
if (cg->window < cg->ssthresh) {
cg->window += f->len;
cg->window += f->plen;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion slow start win:%uz, ss:%uz, if:%uz",
cg->window, cg->ssthresh, cg->in_flight);
} else {
cg->window += qc->tp.max_udp_payload_size * f->len / cg->window;
cg->window += qc->tp.max_udp_payload_size * f->plen / cg->window;
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion avoidance win:%uz, ss:%uz, if:%uz",
@ -4572,18 +4582,28 @@ ngx_quic_congestion_ack(ngx_connection_t *c, ngx_quic_frame_t *f)
static void
ngx_quic_congestion_lost(ngx_connection_t *c, ngx_msec_t sent)
ngx_quic_congestion_lost(ngx_connection_t *c, ngx_quic_frame_t *f)
{
ngx_msec_t timer;
ngx_quic_congestion_t *cg;
ngx_quic_connection_t *qc;
if (f->plen == 0) {
return;
}
qc = c->quic;
cg = &qc->congestion;
timer = sent - cg->recovery_start;
cg->in_flight -= f->plen;
timer = f->last - cg->recovery_start;
if ((ngx_msec_int_t) timer <= 0) {
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"quic congestion lost recovery win:%uz, ss:%uz, if:%uz",
cg->window, cg->ssthresh, cg->in_flight);
return;
}

1
src/event/ngx_event_quic_transport.h
View File

@ -248,6 +248,7 @@ struct ngx_quic_frame_s {
enum ssl_encryption_level_t level;
ngx_queue_t queue;
uint64_t pnum;
size_t plen;
ngx_msec_t first;
ngx_msec_t last;
ssize_t len;