nihilist/tor
1
0
Fork 0
mirror of https://gitlab.torproject.org/tpo/core/tor.git synced 2024-11-27 13:53:31 +01:00
Code Issues Packages Projects Releases Wiki Activity

Remove two conflux algs: maxrate and cwndrate.

Browse Source 
Maxrate had slower throughput than lowrtt in Shadow, which is not too
surprising. We just wanted to test it.
This commit is contained in:
Mike Perry 2023-05-08 14:44:38 +00:00
parent e643a70879
commit a98b1d3ab6
2 changed files with 0 additions and 133 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

131
src/core/or/conflux.c
View File

@ -438,133 +438,6 @@ conflux_decide_circ_cwndrtt(const conflux_t *cfx)
return leg->circ;
}
/**
* Favor the circuit with the highest send rate.
*
* Only spill over to other circuits if they are still in slow start.
* In steady-state, we only use the max throughput circuit.
*/
static const circuit_t *
conflux_decide_circ_maxrate(const conflux_t *cfx)
{
uint64_t max_rate = 0;
const conflux_leg_t *leg = NULL;
/* Find the highest bandwidth leg */
CONFLUX_FOR_EACH_LEG_BEGIN(cfx, l) {
uint64_t rate;
const congestion_control_t *cc = circuit_ccontrol(l->circ);
rate = CELL_MAX_NETWORK_SIZE*USEC_PER_SEC *
cc->cwnd / l->circ_rtts_usec;
if (rate > max_rate) {
max_rate = rate;
leg = l;
}
} CONFLUX_FOR_EACH_LEG_END(l);
/* If the package window is has room, use it */
if (leg && circuit_ready_to_send(leg->circ)) {
return leg->circ;
}
leg = NULL;
max_rate = 0;
/* Find the circuit with the max rate where in_slow_start == 1: */
CONFLUX_FOR_EACH_LEG_BEGIN(cfx, l) {
uint64_t rate;
/* Ignore circuits with no room in the package window */
if (!circuit_ready_to_send(l->circ)) {
continue;
}
const congestion_control_t *cc = circuit_ccontrol(l->circ);
rate = CELL_MAX_NETWORK_SIZE*USEC_PER_SEC *
cc->cwnd / l->circ_rtts_usec;
if (rate > max_rate && cc->in_slow_start) {
max_rate = rate;
leg = l;
}
} CONFLUX_FOR_EACH_LEG_END(l);
/* If no sendable leg was found, don't send on any circuit. */
if (!leg) {
return NULL;
}
return leg->circ;
}
/**
* Favor the circuit with the highest send rate that still has space
* in the congestion window, but when it is full, pick the next
* highest.
*/
static const circuit_t *
conflux_decide_circ_highrate(const conflux_t *cfx)
{
uint64_t max_rate = 0;
uint64_t primary_leg_rtt = 0;
const conflux_leg_t *leg = NULL;
/* Find the highest bandwidth leg */
CONFLUX_FOR_EACH_LEG_BEGIN(cfx, l) {
uint64_t rate;
const congestion_control_t *cc = circuit_ccontrol(l->circ);
rate = CELL_MAX_NETWORK_SIZE*USEC_PER_SEC *
cc->cwnd / l->circ_rtts_usec;
if (rate > max_rate) {
max_rate = rate;
primary_leg_rtt = l->circ_rtts_usec;
leg = l;
}
} CONFLUX_FOR_EACH_LEG_END(l);
/* If the package window is has room, use it */
if (leg && circuit_ready_to_send(leg->circ)) {
return leg->circ;
}
/* Reset the max rate to find a new max */
max_rate = 0;
leg = NULL;
/* For any given leg, it has primary_leg_rtt/2 time before the 'primary'
* leg's acks start arriving. So, the amount of data a 'secondary'
* leg can send while the primary leg transmits these acks is:
* (cwnd_leg/(secondary_rtt/2))*primary_rtt/2
* = cwnd_leg*primary_rtt/secondary_rtt.
* So any leg with available room below that that is no good.
*/
CONFLUX_FOR_EACH_LEG_BEGIN(cfx, l) {
if (!circuit_ready_to_send(l->circ)) {
continue;
}
const congestion_control_t *cc = circuit_ccontrol(l->circ);
uint64_t rate = CELL_MAX_NETWORK_SIZE*USEC_PER_SEC *
cc->cwnd / l->circ_rtts_usec;
/* Pick the leg with the highest rate that still has room */
if (rate > max_rate &&
cwnd_sendable(l->circ, primary_leg_rtt, l->circ_rtts_usec) <=
cwnd_available(l->circ)) {
leg = l;
max_rate = rate;
}
} CONFLUX_FOR_EACH_LEG_END(l);
/* If no sendable leg was found, don't send on any circuit. */
if (!leg) {
return NULL;
}
return leg->circ;
}
/**
* This function is called when we want to send a relay cell on a
* conflux, as well as when we want to compute available space in
@ -736,10 +609,6 @@ conflux_decide_next_circ(conflux_t *cfx)
return (circuit_t*)conflux_decide_circ_lowrtt(cfx);
case CONFLUX_ALG_CWNDRTT: // throughput (low oooq)
return (circuit_t*)conflux_decide_circ_cwndrtt(cfx);
case CONFLUX_ALG_MAXRATE: // perf test (likely high ooq)
return (circuit_t*)conflux_decide_circ_maxrate(cfx);
case CONFLUX_ALG_HIGHRATE: // perf test (likely high ooq)
return (circuit_t*)conflux_decide_circ_highrate(cfx);
default:
return NULL;
}

2
src/core/or/conflux_st.h
View File

@ -20,8 +20,6 @@ typedef enum {
CONFLUX_ALG_MINRTT = 0,
CONFLUX_ALG_LOWRTT = 1,
CONFLUX_ALG_CWNDRTT = 2,
CONFLUX_ALG_MAXRATE = 3,
CONFLUX_ALG_HIGHRATE = 4
} conflux_alg_t;
/**