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MINOR: mux-quic: adjust timeout to accelerate closing

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Improve timeout handling on the MUX. When releasing a stream, first
check if the connection can be considered as dead and should be freed
immediatly. This allows to liberate resources faster when possible.

If the connection is still active, ensure there is no attached
conn-stream before scheduling the timeout. To do this, add a nb_cs field
in the qcc structure.
This commit is contained in:
Amaury Denoyelle 2022-04-04 16:15:06 +02:00
parent 846cc046ae
commit 06890aaa91
3 changed files with 28 additions and 14 deletions
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1
include/haproxy/mux_quic-t.h
View File

@ -27,6 +27,7 @@ enum qcs_type {
struct qcc {
struct connection *conn;
uint64_t nb_cs; /* number of attached conn-streams */
uint32_t flags; /* QC_CF_* */
struct {

2
include/haproxy/mux_quic.h
View File

@ -115,6 +115,8 @@ static inline struct conn_stream *qc_attach_cs(struct qcs *qcs, struct buffer *b
cs->ctx = qcs;
stream_new(qcs->qcc->conn->owner, cs, buf);
++qcs->qcc->nb_cs;
return cs;
}

39
src/mux_quic.c
View File

@ -471,14 +471,7 @@ static inline int qcc_is_dead(const struct qcc *qcc)
/* Return true if the mux timeout should be armed. */
static inline int qcc_may_expire(struct qcc *qcc)
{
/* Consider that the timeout must be set if no bidirectional streams
* are opened.
*/
if (!qcc->strms[QCS_CLT_BIDI].nb_streams)
return 1;
return 0;
return !qcc->nb_cs;
}
/* release function. This one should be called to free all resources allocated
@ -502,6 +495,11 @@ static void qc_release(struct qcc *qcc)
if (qcc->app_ops && qcc->app_ops->release)
qcc->app_ops->release(qcc->ctx);
if (qcc->task) {
task_destroy(qcc->task);
qcc->task = NULL;
}
if (qcc->wait_event.tasklet)
tasklet_free(qcc->wait_event.tasklet);
@ -894,9 +892,14 @@ static struct task *qc_io_cb(struct task *t, void *ctx, unsigned int status)
qc_send(qcc);
if (qc_release_detached_streams(qcc)) {
/* Schedule the mux timeout if no bidirectional streams left. */
if (qcc_may_expire(qcc)) {
qcc->task->expire = tick_add(now_ms, qcc->timeout);
if (qcc_is_dead(qcc)) {
qc_release(qcc);
}
else {
if (qcc_may_expire(qcc))
qcc->task->expire = tick_add(now_ms, qcc->timeout);
else
qcc->task->expire = TICK_ETERNITY;
task_queue(qcc->task);
}
}
@ -955,6 +958,7 @@ static int qc_init(struct connection *conn, struct proxy *prx,
qcc->conn = conn;
conn->ctx = qcc;
qcc->nb_cs = 0;
qcc->flags = 0;
qcc->app_ops = NULL;
@ -1052,6 +1056,8 @@ static void qc_detach(struct conn_stream *cs)
* managment between xprt and mux is reorganized.
*/
--qcc->nb_cs;
if (b_data(&qcs->tx.buf) || qcs->tx.offset > qcs->tx.sent_offset) {
TRACE_DEVEL("leaving with remaining data, detaching qcs", QMUX_EV_STRM_END, qcc->conn, qcs);
qcs->flags |= QC_SF_DETACH;
@ -1060,9 +1066,14 @@ static void qc_detach(struct conn_stream *cs)
qcs_destroy(qcs);
/* Schedule the mux timeout if no bidirectional streams left. */
if (qcc_may_expire(qcc)) {
qcc->task->expire = tick_add(now_ms, qcc->timeout);
if (qcc_is_dead(qcc)) {
qc_release(qcc);
}
else {
if (qcc_may_expire(qcc))
qcc->task->expire = tick_add(now_ms, qcc->timeout);
else
qcc->task->expire = TICK_ETERNITY;
task_queue(qcc->task);
}