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track how many in-flight hs-side rend circs

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not used in decision-making yet, but it's all ready to use in a
"don't dequeue any more if we have too many in-flight" kind of way
This commit is contained in:
Roger Dingledine 2022-06-30 22:01:15 -04:00 committed by Micah Elizabeth Scott
parent 5e768d5cb9
commit b95bd5017f
1 changed files with 26 additions and 0 deletions
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26
src/feature/hs/hs_circuit.c
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@ -689,6 +689,27 @@ trim_rend_pqueue(hs_pow_service_state_t *pow_state, time_t now)
smartlist_free(old_pqueue);
}
/** Count up how many pending outgoing (CIRCUIT_PURPOSE_S_CONNECT_REND)
* circuits there are for this service. Used in the PoW rate limiting
* world to decide whether it's time to launch any new ones.
*/
static int
count_service_rp_circuits_pending(hs_service_t *service)
{
origin_circuit_t *ocirc = NULL;
int count = 0;
while ((ocirc = circuit_get_next_by_purpose(ocirc,
CIRCUIT_PURPOSE_S_CONNECT_REND))) {
/* Count up circuits that are v3 and for this service. */
if (ocirc->hs_ident != NULL &&
ed25519_pubkey_eq(&ocirc->hs_ident->identity_pk,
&service->keys.identity_pk)) {
count++;
}
}
return count;
}
/** How many rendezvous request we handle per mainloop event. Per prop327,
* handling an INTRODUCE2 cell takes on average 5.56msec on an average CPU and
* so it means that launching this max amount of circuits is well below 0.08
@ -705,6 +726,11 @@ handle_rend_pqueue_cb(mainloop_event_t *ev, void *arg)
(void) ev; /* Not using the returned event, make compiler happy. */
log_notice(LD_REND, "Considering launching more rendezvous responses. "
"%d in-flight, %d pending.",
count_service_rp_circuits_pending(service),
smartlist_len(pow_state->rend_request_pqueue));
/* Process rendezvous request until the maximum per mainloop run. */
while (smartlist_len(pow_state->rend_request_pqueue) > 0) {
/* Pop next request by effort. */