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Set new defaults for congestion control parameters.

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Defaults determined from Shadow experimentation.

More parameter functionality changes to follow.
This commit is contained in:
Mike Perry 2022-01-21 15:17:20 +00:00
parent d4cf3fadec
commit 0a6cde8756
4 changed files with 22 additions and 14 deletions
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20
src/core/or/congestion_control_common.c
View File

@ -35,16 +35,18 @@
* *
* More details for each of the parameters can be found in proposal 324, * More details for each of the parameters can be found in proposal 324,
* section 6.5 including tuning notes. */ * section 6.5 including tuning notes. */
#define CIRCWINDOW_INIT (500) #define SENDME_INC_DFLT (TLS_RECORD_MAX_CELLS)
#define SENDME_INC_DFLT (50) #define CIRCWINDOW_INIT (4*SENDME_INC_DFLT)
#define CC_ALG_DFLT (CC_ALG_SENDME) #define CC_ALG_DFLT (CC_ALG_SENDME)
#define CC_ALG_DFLT_ALWAYS (CC_ALG_VEGAS) #define CC_ALG_DFLT_ALWAYS (CC_ALG_VEGAS)
#define CWND_INC_DFLT (50) #define CWND_INC_DFLT (TLS_RECORD_MAX_CELLS)
#define CWND_INC_PCT_SS_DFLT (100) #define CWND_INC_PCT_SS_DFLT (50)
#define CWND_INC_RATE_DFLT (1) #define CWND_INC_RATE_DFLT (1)
#define CWND_MIN_DFLT (SENDME_INC_DFLT)
#define CWND_MAX_DFLT (INT32_MAX) #define CWND_MAX_DFLT (INT32_MAX)
#define CWND_MIN_DFLT (MAX(100, SENDME_INC_DFLT))
#define BWE_SENDME_MIN_DFLT (5) #define BWE_SENDME_MIN_DFLT (5)
#define EWMA_CWND_COUNT_DFLT (2) #define EWMA_CWND_COUNT_DFLT (2)
@ -138,8 +140,8 @@ congestion_control_new_consensus_params(const networkstatus_t *ns)
CWND_MAX_MIN, CWND_MAX_MIN,
CWND_MAX_MAX); CWND_MAX_MAX);
#define SENDME_INC_MIN 10 #define SENDME_INC_MIN 1
#define SENDME_INC_MAX (1000) #define SENDME_INC_MAX (255)
cc_sendme_inc = cc_sendme_inc =
networkstatus_get_param(NULL, "cc_sendme_inc", networkstatus_get_param(NULL, "cc_sendme_inc",
SENDME_INC_DFLT, SENDME_INC_DFLT,
@ -171,7 +173,7 @@ congestion_control_init_params(congestion_control_t *cc,
const or_options_t *opts = get_options(); const or_options_t *opts = get_options();
cc->sendme_inc = params->sendme_inc_cells; cc->sendme_inc = params->sendme_inc_cells;
#define CWND_INIT_MIN 100 #define CWND_INIT_MIN SENDME_INC_DFLT
#define CWND_INIT_MAX (10000) #define CWND_INIT_MAX (10000)
cc->cwnd = cc->cwnd =
networkstatus_get_param(NULL, "cc_cwnd_init", networkstatus_get_param(NULL, "cc_cwnd_init",
@ -203,7 +205,7 @@ congestion_control_init_params(congestion_control_t *cc,
CWND_INC_RATE_MIN, CWND_INC_RATE_MIN,
CWND_INC_RATE_MAX); CWND_INC_RATE_MAX);
#define CWND_MIN_MIN 20 #define CWND_MIN_MIN SENDME_INC_DFLT
#define CWND_MIN_MAX (1000) #define CWND_MIN_MAX (1000)
cc->cwnd_min = cc->cwnd_min =
networkstatus_get_param(NULL, "cc_cwnd_min", networkstatus_get_param(NULL, "cc_cwnd_min",

4
src/core/or/congestion_control_common.h
View File

@ -13,6 +13,10 @@
#include "core/or/crypt_path_st.h" #include "core/or/crypt_path_st.h"
#include "core/or/circuit_st.h" #include "core/or/circuit_st.h"
/* The maximum whole number of cells that can fit in a
* full TLS record. This is 31. */
#define TLS_RECORD_MAX_CELLS ((16 * 1024) / CELL_MAX_NETWORK_SIZE)
typedef struct congestion_control_t congestion_control_t; typedef struct congestion_control_t congestion_control_t;
/** Wrapper for the free function, set the CC pointer to NULL after free */ /** Wrapper for the free function, set the CC pointer to NULL after free */

2
src/core/or/congestion_control_flow.c
View File

@ -116,7 +116,7 @@ flow_control_new_consensus_params(const networkstatus_t *ns)
CC_XON_RATE_BYTES_MAX)*RELAY_PAYLOAD_SIZE; CC_XON_RATE_BYTES_MAX)*RELAY_PAYLOAD_SIZE;
#define CC_XON_EWMA_CNT_DFLT (2) #define CC_XON_EWMA_CNT_DFLT (2)
#define CC_XON_EWMA_CNT_MIN (1) #define CC_XON_EWMA_CNT_MIN (2)
#define CC_XON_EWMA_CNT_MAX (100) #define CC_XON_EWMA_CNT_MAX (100)
xon_ewma_cnt = networkstatus_get_param(ns, "cc_xon_ewma_cnt", xon_ewma_cnt = networkstatus_get_param(ns, "cc_xon_ewma_cnt",
CC_XON_EWMA_CNT_DFLT, CC_XON_EWMA_CNT_DFLT,

10
src/core/or/congestion_control_vegas.c
View File

@ -23,11 +23,13 @@
#include "core/or/channel.h" #include "core/or/channel.h"
#include "feature/nodelist/networkstatus.h" #include "feature/nodelist/networkstatus.h"
#define VEGAS_GAMMA(cc) (6*(cc)->sendme_inc) #define OUTBUF_CELLS (2*TLS_RECORD_MAX_CELLS)
#define VEGAS_ALPHA(cc) (3*(cc)->sendme_inc)
#define VEGAS_BETA(cc) (6*(cc)->sendme_inc)
#define VEGAS_BDP_MIX_PCT 0 #define VEGAS_ALPHA(cc) (3*OUTBUF_CELLS-TLS_RECORD_MAX_CELLS)
#define VEGAS_BETA(cc) (3*OUTBUF_CELLS)
#define VEGAS_GAMMA(cc) (3*OUTBUF_CELLS)
#define VEGAS_BDP_MIX_PCT 100
/** /**
* The original TCP Vegas used only a congestion window BDP estimator. We * The original TCP Vegas used only a congestion window BDP estimator. We