[tor] branch main updated (0781c2968d -> 9976da9367)

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gitolite role

24 May 2023 24 May '23

3:38 p.m.

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dgoulet pushed a change to branch main in repository tor.

from 0781c2968d Merge branch 'tor-gitlab/mr/710' new a98b1d3ab6 Remove two conflux algs: maxrate and cwndrate. new c8341abf82 Clean up and disable switch rate limiting. new a340acb492 Clean up UX decision logic; hardcode for browser UX case. new 0c11577987 Fix unit tests. new 79dab29a05 Add torrc option for conflux client UX. new 032d850a2c Add changes file for conflux. new 9976da9367 Merge branch 'tor-gitlab/mr/709'

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24 May 24 May

3:38 p.m.

New subject: [tor] 01/07: Remove two conflux algs: maxrate and cwndrate.

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dgoulet pushed a commit to branch main in repository tor.

commit a98b1d3ab67af5d14039cc277ad4532d99036355 Author: Mike Perry mikeperry-git@torproject.org AuthorDate: Mon May 8 14:44:38 2023 +0000

Remove two conflux algs: maxrate and cwndrate.

Maxrate had slower throughput than lowrtt in Shadow, which is not too surprising. We just wanted to test it. --- src/core/or/conflux.c | 131 ----------------------------------------------- src/core/or/conflux_st.h | 2 - 2 files changed, 133 deletions(-)

diff --git a/src/core/or/conflux.c b/src/core/or/conflux.c index e9a66b83e1..e2e9460c06 100644 --- a/src/core/or/conflux.c +++ b/src/core/or/conflux.c @@ -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; } diff --git a/src/core/or/conflux_st.h b/src/core/or/conflux_st.h index dae4845cb6..af2e4db7b8 100644 --- a/src/core/or/conflux_st.h +++ b/src/core/or/conflux_st.h @@ -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;

/**

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gitolite role

3:38 p.m.

New subject: [tor] 02/07: Clean up and disable switch rate limiting.

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dgoulet pushed a commit to branch main in repository tor.

commit c8341abf82fcf3cdd0f5c68f25b0526270dbbe2c Author: Mike Perry mikeperry-git@torproject.org AuthorDate: Tue May 9 19:42:05 2023 +0000

Clean up and disable switch rate limiting.

Switch rate limiting will likely be helpful for limiting OOQ, but according to shadow it was the cause of slower performance in Hong Kong endpoints.

So let's disable it, and then optimize for OOQ later. --- src/core/or/conflux.c | 85 +++++++++++++++++++++++---------------------------- 1 file changed, 39 insertions(+), 46 deletions(-)

diff --git a/src/core/or/conflux.c b/src/core/or/conflux.c index e2e9460c06..5f6af9268b 100644 --- a/src/core/or/conflux.c +++ b/src/core/or/conflux.c @@ -209,7 +209,7 @@ circuit_ready_to_send(const circuit_t *circ) * cwnd, because inflight is decremented before this check */ // TODO-329-TUNING: This subtraction not be right.. It depends // on call order wrt decisions and sendme arrival - if (cc->inflight + cc->sendme_inc >= cc->cwnd) { + if (cc->inflight >= cc->cwnd) { cc_sendable = false; }

@@ -289,6 +289,21 @@ conflux_decide_circ_lowrtt(const conflux_t *cfx) return circ; }

+/** + * Returns the amount of room in a cwnd on a circuit. + */ +static inline uint64_t +cwnd_available(const circuit_t *on_circ) +{ + const congestion_control_t *cc = circuit_ccontrol(on_circ); + tor_assert(cc); + + if (cc->cwnd < cc->inflight) + return 0; + + return cc->cwnd - cc->inflight; +} + /** * Return the amount of congestion window we can send on * on_circ during in_usec. However, if we're still in @@ -300,42 +315,30 @@ cwnd_sendable(const circuit_t *on_circ, uint64_t in_usec, uint64_t our_usec) { const congestion_control_t *cc = circuit_ccontrol(on_circ); - tor_assert(cc); - - // TODO-329-TUNING: This function may want to consider inflight? + uint64_t cwnd_adjusted = cwnd_available(on_circ);

if (our_usec == 0 || in_usec == 0) { log_fn(LOG_PROTOCOL_WARN, LD_CIRC, "cwnd_sendable: Missing RTT data. in_usec: %" PRIu64 " our_usec: %" PRIu64, in_usec, our_usec); - return cc->cwnd; + return cwnd_adjusted; }

if (cc->in_slow_start) { - return cc->cwnd; + return cwnd_adjusted; } else { - uint64_t sendable = - conflux_params_get_send_pct()*cc->cwnd*in_usec/(100*our_usec); + /* For any given leg, it has min_rtt/2 time before the 'primary' + * leg's acks start arriving. So, the amount of data this + * 'secondary' leg can send while the min_rtt leg transmits these + * acks is: + * (cwnd_leg/(leg_rtt/2))*min_rtt/2 = cwnd_leg*min_rtt/leg_rtt. + */ + uint64_t sendable = cwnd_adjusted*in_usec/our_usec; return MIN(cc->cwnd, sendable); } }

-/** - * Returns the amount of room in a cwnd on a circuit. - */ -static inline uint64_t -cwnd_available(const circuit_t *on_circ) -{ - const congestion_control_t *cc = circuit_ccontrol(on_circ); - tor_assert(cc); - - if (cc->cwnd < cc->inflight) - return 0; - - return cc->cwnd - cc->inflight; -} - /** * Returns true if we can switch to a new circuit, false otherwise. * @@ -360,15 +363,14 @@ conflux_can_switch(const conflux_t *cfx) * of the congestion window, then we can switch. * We check the sendme_inc because there may be un-ackable * data in inflight as well, and we can still switch then. */ + // TODO-329-TUNING: Should we try to switch if the prev_leg is + // ready to send, instead of this? if (ccontrol->inflight < ccontrol->sendme_inc || 100*ccontrol->inflight <= conflux_params_get_drain_pct()*ccontrol->cwnd) { return true; }

- // TODO-329-TUNING: Should we try to switch if the prev_leg is - // ready to send? - return false; }

@@ -407,14 +409,6 @@ conflux_decide_circ_cwndrtt(const conflux_t *cfx) return leg->circ; }

- /* For any given leg, it has min_rtt/2 time before the 'primary' - * leg's acks start arriving. So, the amount of data this - * 'secondary' leg can send while the min_rtt leg transmits these - * acks is: - * (cwnd_leg/(leg_rtt/2))*min_rtt/2 = cwnd_leg*min_rtt/leg_rtt. - * So any leg with available room below that is no good. - */ - leg = NULL;

CONFLUX_FOR_EACH_LEG_BEGIN(cfx, l) { @@ -425,8 +419,7 @@ conflux_decide_circ_cwndrtt(const conflux_t *cfx) /* Pick a 'min_leg' with the lowest RTT that still has * room in the congestion window. Note that this works for * min_leg itself, up to inflight. */ - if (cwnd_sendable(l->circ, min_rtt, l->circ_rtts_usec) <= - cwnd_available(l->circ)) { + if (cwnd_sendable(l->circ, min_rtt, l->circ_rtts_usec) > 0) { leg = l; } } CONFLUX_FOR_EACH_LEG_END(l); @@ -484,9 +477,12 @@ conflux_decide_circ_for_send(conflux_t *cfx, tor_assert(cfx->curr_leg);

if (new_circ != cfx->curr_leg->circ) { - cfx->cells_until_switch = - cwnd_sendable(new_circ,cfx->curr_leg->circ_rtts_usec, - new_leg->circ_rtts_usec); + // TODO-329-TUNING: This is one mechanism to rate limit switching, + // which should reduce the OOQ mem. However, we're not going to do that + // until we get some data on if the memory usage is high + cfx->cells_until_switch = 0; + //cwnd_sendable(new_circ,cfx->curr_leg->circ_rtts_usec, + // new_leg->circ_rtts_usec);

conflux_validate_stream_lists(cfx);

@@ -559,13 +555,10 @@ conflux_pick_first_leg(conflux_t *cfx) tor_assert(min_leg); }

- // TODO-329-TUNING: Does this create an edge condition by getting blocked, - // is it possible that we get full before this point and block? - // Esp if we switch to a new circuit that is not ready to - // send because it has unacked inflight data.... This might cause - // stalls? - // That is the thinking with this -1 here, but maybe it is not needed. - cfx->cells_until_switch = circuit_ccontrol(min_leg->circ)->cwnd - 1; + // TODO-329-TUNING: We may want to initialize this to a cwnd, to + // minimize early switching? + //cfx->cells_until_switch = circuit_ccontrol(min_leg->circ)->cwnd; + cfx->cells_until_switch = 0;

cfx->curr_leg = min_leg; }

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gitolite role

3:38 p.m.

New subject: [tor] 03/07: Clean up UX decision logic; hardcode for browser UX case.

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dgoulet pushed a commit to branch main in repository tor.

commit a340acb492e216e74334f4ff00dbbe5abc6ec956 Author: Mike Perry mikeperry-git@torproject.org AuthorDate: Tue May 9 20:11:41 2023 +0000

Clean up UX decision logic; hardcode for browser UX case. --- src/core/or/conflux_cell.c | 15 +++------------ src/core/or/conflux_cell.h | 2 +- src/core/or/conflux_pool.c | 20 ++++++++++++-------- 3 files changed, 16 insertions(+), 21 deletions(-)

diff --git a/src/core/or/conflux_cell.c b/src/core/or/conflux_cell.c index fa0bb1c23e..a59fa735f1 100644 --- a/src/core/or/conflux_cell.c +++ b/src/core/or/conflux_cell.c @@ -266,22 +266,13 @@ conflux_cell_parse_linked(const cell_t *cell, const uint16_t cell_len)

conflux_cell_link_t * conflux_cell_new_link(const uint8_t *nonce, uint64_t last_seqno_sent, - uint64_t last_seqno_recv, bool is_client) + uint64_t last_seqno_recv, uint8_t ux) { conflux_cell_link_t *link = tor_malloc_zero(sizeof(*link));

link->version = 0x01; - if (is_client) { - // TODO-329-TUNING: The default should probably be high-throughput, - // but mobile clients may want to use low-memory.. We may also want - // to move this choice upstairs, so that torrc can control it. - link->desired_ux = CONFLUX_UX_HIGH_THROUGHPUT; - } else { - // TODO-329-TUNING: For exits, the default should be min-latency - // but we need to fix the tests and evaluate this first. - //link->desired_ux = CONFLUX_UX_MIN_LATENCY; - link->desired_ux = CONFLUX_UX_HIGH_THROUGHPUT; - } + link->desired_ux = ux; + link->last_seqno_sent = last_seqno_sent; link->last_seqno_recv = last_seqno_recv; memcpy(link->nonce, nonce, sizeof(link->nonce)); diff --git a/src/core/or/conflux_cell.h b/src/core/or/conflux_cell.h index afaecae6f5..60fff42241 100644 --- a/src/core/or/conflux_cell.h +++ b/src/core/or/conflux_cell.h @@ -23,7 +23,7 @@ typedef struct conflux_cell_link_t { conflux_cell_link_t *conflux_cell_new_link(const uint8_t *nonce, uint64_t last_sent, uint64_t last_recv, - bool is_client); + uint8_t ux);

conflux_cell_link_t *conflux_cell_parse_link(const cell_t *cell, const uint16_t cell_len); diff --git a/src/core/or/conflux_pool.c b/src/core/or/conflux_pool.c index ae14bd1b3c..02d511149c 100644 --- a/src/core/or/conflux_pool.c +++ b/src/core/or/conflux_pool.c @@ -143,18 +143,19 @@ fmt_nonce(const uint8_t *nonce) static uint8_t conflux_choose_algorithm(uint8_t desired_ux) { - /* TODO-329-TUNING: Pick better algs here*/ switch (desired_ux) { case CONFLUX_UX_NO_OPINION: return CONFLUX_ALG_LOWRTT; case CONFLUX_UX_MIN_LATENCY: return CONFLUX_ALG_MINRTT; - case CONFLUX_UX_LOW_MEM_LATENCY: - return CONFLUX_ALG_MINRTT; - case CONFLUX_UX_LOW_MEM_THROUGHPUT: - return CONFLUX_ALG_CWNDRTT; case CONFLUX_UX_HIGH_THROUGHPUT: return CONFLUX_ALG_LOWRTT; + /* For now, we have no low mem algs, so use minRTT since it should + * switch less and thus use less mem */ + /* TODO-329-TUNING: Pick better algs here*/ + case CONFLUX_UX_LOW_MEM_THROUGHPUT: + case CONFLUX_UX_LOW_MEM_LATENCY: + return CONFLUX_ALG_MINRTT; default: /* Trunnel should protect us from this */ tor_assert_nonfatal_unreached(); @@ -1105,11 +1106,12 @@ conflux_launch_leg(const uint8_t *nonce) // arti-relay could (if resumption seems worthwhile; it may not be worth the // memory storage there, either).

- /* We have a circuit, create the new leg and attach it to the set. */ + /* We have a circuit, create the new leg and attach it to the set. + * TODO-329-TUNING: Should we make a torrc option to request min latency? */ leg_t *leg = leg_new(TO_CIRCUIT(circ), conflux_cell_new_link(nonce, last_seq_sent, last_seq_recv, - true)); + CONFLUX_UX_HIGH_THROUGHPUT));

/* Increase the retry count for this conflux object as in this nonce. */ unlinked->cfx->num_leg_launch++; @@ -1760,8 +1762,10 @@ conflux_process_link(circuit_t *circ, const cell_t *cell, goto end; }

+ /* Exits should always request min latency from clients */ conflux_cell_link_t *linked = conflux_cell_new_link(nonce, last_seq_sent, - last_seq_recv, false); + last_seq_recv, + CONFLUX_UX_MIN_LATENCY);

conflux_cell_send_linked(linked, TO_OR_CIRCUIT(circ)); tor_free(linked);

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gitolite role

3:38 p.m.

New subject: [tor] 04/07: Fix unit tests.

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dgoulet pushed a commit to branch main in repository tor.

commit 0c115779871e05586cc1aa1526d4cc65aced2b0a Author: Mike Perry mikeperry-git@torproject.org AuthorDate: Wed May 10 21:56:52 2023 +0000

Fix unit tests. --- src/core/or/conflux_pool.c | 9 +++++++-- src/core/or/conflux_pool.h | 2 ++ src/test/test_conflux_pool.c | 2 ++ 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/core/or/conflux_pool.c b/src/core/or/conflux_pool.c index 02d511149c..b02b23f24d 100644 --- a/src/core/or/conflux_pool.c +++ b/src/core/or/conflux_pool.c @@ -130,6 +130,11 @@ get_linked_pool(bool is_client) } #endif

+/* For unit tests only: please treat these exactly as the defines in the + * code. */ +STATIC uint8_t DEFAULT_CLIENT_UX = CONFLUX_UX_HIGH_THROUGHPUT; +STATIC uint8_t DEFAULT_EXIT_UX = CONFLUX_UX_MIN_LATENCY; + /** Helper: Format at 8 bytes the nonce for logging. */ static inline const char * fmt_nonce(const uint8_t *nonce) @@ -1111,7 +1116,7 @@ conflux_launch_leg(const uint8_t *nonce) leg_t *leg = leg_new(TO_CIRCUIT(circ), conflux_cell_new_link(nonce, last_seq_sent, last_seq_recv, - CONFLUX_UX_HIGH_THROUGHPUT)); + DEFAULT_CLIENT_UX));

/* Increase the retry count for this conflux object as in this nonce. */ unlinked->cfx->num_leg_launch++; @@ -1765,7 +1770,7 @@ conflux_process_link(circuit_t *circ, const cell_t *cell, /* Exits should always request min latency from clients */ conflux_cell_link_t *linked = conflux_cell_new_link(nonce, last_seq_sent, last_seq_recv, - CONFLUX_UX_MIN_LATENCY); + DEFAULT_EXIT_UX);

conflux_cell_send_linked(linked, TO_OR_CIRCUIT(circ)); tor_free(linked); diff --git a/src/core/or/conflux_pool.h b/src/core/or/conflux_pool.h index 547b4d3974..6bb858bb09 100644 --- a/src/core/or/conflux_pool.h +++ b/src/core/or/conflux_pool.h @@ -40,6 +40,8 @@ void conflux_process_linked_ack(circuit_t *circ); bool launch_new_set(int num_legs); digest256map_t *get_linked_pool(bool is_client); digest256map_t *get_unlinked_pool(bool is_client); +extern uint8_t DEFAULT_CLIENT_UX; +extern uint8_t DEFAULT_EXIT_UX; #endif /* defined(UNIT_TESTS) */

#endif /* TOR_CONFLUX_POOL_H */ diff --git a/src/test/test_conflux_pool.c b/src/test/test_conflux_pool.c index b8053b7c0a..3da85705b3 100644 --- a/src/test/test_conflux_pool.c +++ b/src/test/test_conflux_pool.c @@ -53,6 +53,7 @@ #include "core/or/conflux_params.h" #include "core/or/conflux.h" #include "core/or/conflux_st.h" +#include "trunnel/conflux.h" #include "lib/crypt_ops/crypto_rand.h"

/* Start our monotime mocking at 1 second past whatever monotime_init() @@ -1112,6 +1113,7 @@ test_conflux_switch(void *arg) { (void) arg; test_setup(); + DEFAULT_EXIT_UX = CONFLUX_UX_HIGH_THROUGHPUT;

launch_new_set(2);

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3:38 p.m.

New subject: [tor] 05/07: Add torrc option for conflux client UX.

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dgoulet pushed a commit to branch main in repository tor.

commit 79dab29a0505e1cee1eee55f346415aeb70e8d6f Author: Mike Perry mikeperry-git@torproject.org AuthorDate: Thu May 11 17:57:00 2023 +0000

Add torrc option for conflux client UX. --- doc/man/tor.1.txt | 7 +++++++ src/app/config/config.c | 18 ++++++++++++++++++ src/app/config/or_options_st.h | 4 ++++ src/core/or/conflux_pool.c | 24 +++++++++++++++++++++--- 4 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/doc/man/tor.1.txt b/doc/man/tor.1.txt index 2ac6a8471c..c3bc053142 100644 --- a/doc/man/tor.1.txt +++ b/doc/man/tor.1.txt @@ -354,6 +354,13 @@ forward slash (/) in the configuration file and on the command line. supported at the moment. Default value is set to "auto" meaning the consensus is used to decide unless set. (Default: auto)

+[[ConfluxClientUX]] **ConfluxClientUX** **throughput**|**latency**|**throughput_lowmem**|**latency_lowmem**:: + This option configures the user experience that the client requests from + the exit, for data that the exit sends to the client. The default is + "throughput", which maximizes throughput. "Latency" will tell the exit to + only use the circuit with lower latency for all data. The lowmem versions + minimize queue usage memory at the client. (Default: "throughput") + [[ConnLimit]] **ConnLimit** __NUM__:: The minimum number of file descriptors that must be available to the Tor process before it will start. Tor will ask the OS for as many file diff --git a/src/app/config/config.c b/src/app/config/config.c index 24321b764f..e2de72c855 100644 --- a/src/app/config/config.c +++ b/src/app/config/config.c @@ -77,6 +77,7 @@ #include "core/or/circuitmux_ewma.h" #include "core/or/circuitstats.h" #include "core/or/connection_edge.h" +#include "trunnel/conflux.h" #include "core/or/dos.h" #include "core/or/policies.h" #include "core/or/relay.h" @@ -380,6 +381,8 @@ static const config_var_t option_vars_[] = { V(ClientUseIPv6, BOOL, "0"), V(ClientUseIPv4, BOOL, "1"), V(ConfluxEnabled, AUTOBOOL, "auto"), + VAR("ConfluxClientUX", STRING, ConfluxClientUX_option, + "throughput"), V(ConnLimit, POSINT, "1000"), V(ConnDirectionStatistics, BOOL, "0"), V(ConstrainedSockets, BOOL, "0"), @@ -3545,6 +3548,21 @@ options_validate_cb(const void *old_options_, void *options_, char **msg) return -1; }

+ options->ConfluxClientUX = CONFLUX_UX_HIGH_THROUGHPUT; + if (options->ConfluxClientUX_option) { + if (!strcmp(options->ConfluxClientUX_option, "latency")) + options->ConfluxClientUX = CONFLUX_UX_MIN_LATENCY; + else if (!strcmp(options->ConfluxClientUX_option, "throughput")) + options->ConfluxClientUX = CONFLUX_UX_HIGH_THROUGHPUT; + else if (!strcmp(options->ConfluxClientUX_option, "latency_lowmem")) + options->ConfluxClientUX = CONFLUX_UX_LOW_MEM_LATENCY; + else if (!strcmp(options->ConfluxClientUX_option, "throughput_lowmem")) + options->ConfluxClientUX = CONFLUX_UX_LOW_MEM_THROUGHPUT; + else + REJECT("ConfluxClientUX must be 'latency', 'throughput, " + "'latency_lowmem', or 'throughput_lowmem'"); + } + if (options_validate_publish_server(old_options, options, msg) < 0) return -1;

diff --git a/src/app/config/or_options_st.h b/src/app/config/or_options_st.h index 056aa3b776..c8680bb49e 100644 --- a/src/app/config/or_options_st.h +++ b/src/app/config/or_options_st.h @@ -727,6 +727,10 @@ struct or_options_t { * circuits which excludes onion service traffic. */ int ConfluxEnabled;

+ /** Has the UX integer value that the client will request from the exit. */ + char *ConfluxClientUX_option; + int ConfluxClientUX; + /** The length of time that we think a consensus should be fresh. */ int V3AuthVotingInterval; /** The length of time we think it will take to distribute votes. */ diff --git a/src/core/or/conflux_pool.c b/src/core/or/conflux_pool.c index b02b23f24d..c84613503f 100644 --- a/src/core/or/conflux_pool.c +++ b/src/core/or/conflux_pool.c @@ -36,6 +36,7 @@

#include "feature/nodelist/nodelist.h" #include "feature/client/bridges.h" +#include "app/config/config.h"

#include "lib/crypt_ops/crypto_rand.h" #include "lib/crypt_ops/crypto_util.h" @@ -1022,6 +1023,24 @@ get_exit_for_nonce(const uint8_t *nonce) return exit; }

+/** + * Return the currently configured client UX. + */ +static uint8_t +get_client_ux(void) +{ +#ifdef TOR_UNIT_TESTS + return DEFAULT_CLIENT_UX; +#else + const or_options_t *opt = get_options(); + tor_assert(opt); + (void)DEFAULT_CLIENT_UX; + + /* Return the UX */ + return opt->ConfluxClientUX; +#endif +} + /** Return true iff the given conflux object is allowed to launch a new leg. If * the cfx object is NULL, then it is always allowed to launch a new leg. */ static bool @@ -1111,12 +1130,11 @@ conflux_launch_leg(const uint8_t *nonce) // arti-relay could (if resumption seems worthwhile; it may not be worth the // memory storage there, either).

- /* We have a circuit, create the new leg and attach it to the set. - * TODO-329-TUNING: Should we make a torrc option to request min latency? */ + /* We have a circuit, create the new leg and attach it to the set. */ leg_t *leg = leg_new(TO_CIRCUIT(circ), conflux_cell_new_link(nonce, last_seq_sent, last_seq_recv, - DEFAULT_CLIENT_UX)); + get_client_ux()));

/* Increase the retry count for this conflux object as in this nonce. */ unlinked->cfx->num_leg_launch++;

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3:38 p.m.

New subject: [tor] 06/07: Add changes file for conflux.

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dgoulet pushed a commit to branch main in repository tor.

commit 032d850a2c48a1d4c767accc50ad92907309e9fc Author: Mike Perry mikeperry-git@torproject.org AuthorDate: Thu May 11 19:24:49 2023 +0000

Add changes file for conflux. --- changes/ticket40593 | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

diff --git a/changes/ticket40593 b/changes/ticket40593 new file mode 100644 index 0000000000..6590ea492c --- /dev/null +++ b/changes/ticket40593 @@ -0,0 +1,16 @@ + o Major features (conflux): + - Implement Proposal 329 (conflux traffic splitting). Conflux splits + traffic across two circuits to Exits that support the protocol. + These circuits are pre-built only, which means that if the pre-built + conflux pool runs out, regular circuits will then be used. + + When using conflux circuit pairs, clients choose the lower-latency + circuit to send data to the Exit. When the Exit sends data to the + client, it maximizes throughput, by fully utilizing both circuits in a + multiplexed fashion. Alternatively, clients can request that the Exit + optimize for latency when transmitting to them, by setting the torrc + option 'ConfluxClientUX latency'. + + Onion services are not currently supported, but will be in arti. Many + other future optimizations will also be possible using this protocol. + Closes ticket 40593.

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3:38 p.m.

New subject: [tor] 07/07: Merge branch 'tor-gitlab/mr/709'

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dgoulet pushed a commit to branch main in repository tor.

commit 9976da93679acc422c174f5e5b5bf890e387f1b1 Merge: 0781c2968d 032d850a2c Author: David Goulet dgoulet@torproject.org AuthorDate: Wed May 24 11:37:05 2023 -0400

Merge branch 'tor-gitlab/mr/709'

diff --cc src/app/config/config.c index fff82be1b7,e2de72c855..10090f273d --- a/src/app/config/config.c +++ b/src/app/config/config.c @@@ -377,9 -378,11 +378,11 @@@ static const config_var_t option_vars_[ OBSOLETE("ClientAutoIPv6ORPort"), V(ClientRejectInternalAddresses, BOOL, "1"), V(ClientTransportPlugin, LINELIST, NULL), - V(ClientUseIPv6, BOOL, "0"), + V(ClientUseIPv6, BOOL, "1"), V(ClientUseIPv4, BOOL, "1"), V(ConfluxEnabled, AUTOBOOL, "auto"), + VAR("ConfluxClientUX", STRING, ConfluxClientUX_option, + "throughput"), V(ConnLimit, POSINT, "1000"), V(ConnDirectionStatistics, BOOL, "0"), V(ConstrainedSockets, BOOL, "0"),

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