commit baeff46d3625002a9de5781cd86b6c45834bbe56 Merge: d0c335021 fd1686c7d Author: Nick Mathewson nickm@torproject.org Date: Thu Feb 13 09:21:47 2020 -0500

Merge branch 'ticket33290_v2_042' into ticket33290_v2_043

Conflicts: src/core/or/circuitmux_ewma.c

changes/ticket33290 | 4 ++++ src/core/or/circuitmux.c | 8 ++++++-- src/core/or/circuitmux_ewma.c | 4 +++- src/core/or/circuitmux_ewma.h | 9 ++++++--- 4 files changed, 19 insertions(+), 6 deletions(-)

diff --cc src/core/or/circuitmux.c index 0e932f032,72f6ba662..1f79ea4d9 --- a/src/core/or/circuitmux.c +++ b/src/core/or/circuitmux.c @@@ -77,8 -75,12 +77,10 @@@ #include "core/or/circuitmux.h" #include "core/or/relay.h"

-#include "core/or/cell_queue_st.h" -#include "core/or/destroy_cell_queue_st.h" #include "core/or/or_circuit_st.h"

+ #include "lib/crypt_ops/crypto_util.h" + /* * Private typedefs for circuitmux.c */ diff --cc src/core/or/circuitmux_ewma.h index fc7e7ebf7,b45ce1f91..e41cf9e0f --- a/src/core/or/circuitmux_ewma.h +++ b/src/core/or/circuitmux_ewma.h @@@ -22,114 -22,9 +22,117 @@@ void cmux_ewma_set_options(const or_opt void circuitmux_ewma_free_all(void);

#ifdef CIRCUITMUX_EWMA_PRIVATE + +/*** EWMA structures ***/ + +typedef struct cell_ewma_t cell_ewma_t; +typedef struct ewma_policy_data_t ewma_policy_data_t; +typedef struct ewma_policy_circ_data_t ewma_policy_circ_data_t; + +/** + * The cell_ewma_t structure keeps track of how many cells a circuit has + * transferred recently. It keeps an EWMA (exponentially weighted moving + * average) of the number of cells flushed from the circuit queue onto a + * connection in channel_flush_from_first_active_circuit(). + */ + +struct cell_ewma_t { + /** The last 'tick' at which we recalibrated cell_count. + * + * A cell sent at exactly the start of this tick has weight 1.0. Cells sent + * since the start of this tick have weight greater than 1.0; ones sent + * earlier have less weight. */ + unsigned int last_adjusted_tick; + /** The EWMA of the cell count. */ + double cell_count; + /** True iff this is the cell count for a circuit's previous + * channel. */ + unsigned int is_for_p_chan : 1; + /** The position of the circuit within the OR connection's priority + * queue. */ + int heap_index; +}; + +struct ewma_policy_data_t { + circuitmux_policy_data_t base_; + + /** + * Priority queue of cell_ewma_t for circuits with queued cells waiting + * for room to free up on the channel that owns this circuitmux. Kept + * in heap order according to EWMA. This was formerly in channel_t, and + * in or_connection_t before that. + */ + smartlist_t *active_circuit_pqueue; + + /** + * The tick on which the cell_ewma_ts in active_circuit_pqueue last had + * their ewma values rescaled. This was formerly in channel_t, and in + * or_connection_t before that. + */ + unsigned int active_circuit_pqueue_last_recalibrated; +}; + +struct ewma_policy_circ_data_t { + circuitmux_policy_circ_data_t base_; + + /** + * The EWMA count for the number of cells flushed from this circuit + * onto this circuitmux. Used to determine which circuit to flush + * from next. This was formerly in circuit_t and or_circuit_t. + */ + cell_ewma_t cell_ewma; + + /** + * Pointer back to the circuit_t this is for; since we're separating + * out circuit selection policy like this, we can't attach cell_ewma_t + * to the circuit_t any more, so we can't use SUBTYPE_P directly to a + * circuit_t like before; instead get it here. + */ + circuit_t *circ; +}; + +#define EWMA_POL_DATA_MAGIC 0x2fd8b16aU +#define EWMA_POL_CIRC_DATA_MAGIC 0x761e7747U + +/*** Downcasts for the above types ***/ + +/** + * Downcast a circuitmux_policy_data_t to an ewma_policy_data_t and assert + * if the cast is impossible. + */ + +static inline ewma_policy_data_t * +TO_EWMA_POL_DATA(circuitmux_policy_data_t *pol) +{ + if (!pol) return NULL; + else { - tor_assert(pol->magic == EWMA_POL_DATA_MAGIC); ++ tor_assertf(pol->magic == EWMA_POL_DATA_MAGIC, ++ "Mismatch: %"PRIu32" != %"PRIu32, ++ pol->magic, EWMA_POL_DATA_MAGIC); + return DOWNCAST(ewma_policy_data_t, pol); + } +} + +/** + * Downcast a circuitmux_policy_circ_data_t to an ewma_policy_circ_data_t + * and assert if the cast is impossible. + */ + +static inline ewma_policy_circ_data_t * +TO_EWMA_POL_CIRC_DATA(circuitmux_policy_circ_data_t *pol) +{ + if (!pol) return NULL; + else { - tor_assert(pol->magic == EWMA_POL_CIRC_DATA_MAGIC); ++ tor_assertf(pol->magic == EWMA_POL_CIRC_DATA_MAGIC, ++ "Mismatch: %"PRIu32" != %"PRIu32, ++ pol->magic, EWMA_POL_CIRC_DATA_MAGIC); + return DOWNCAST(ewma_policy_circ_data_t, pol); + } +} + STATIC unsigned cell_ewma_get_current_tick_and_fraction(double *remainder_out); STATIC void cell_ewma_initialize_ticks(void); -#endif

-#endif /* !defined(TOR_CIRCUITMUX_EWMA_H) */ +#endif /* defined(CIRCUITMUX_EWMA_PRIVATE) */

+#endif /* !defined(TOR_CIRCUITMUX_EWMA_H) */ -