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17 * @author Christian Grothoff
20 * Global constants for performance tuning
22 * @defgroup constants Constant definitions
23 * Global constants for performance tuning
27 #ifndef GNUNET_CONSTANTS_H
28 #define GNUNET_CONSTANTS_H
33 #if 0 /* keep Emacsens' auto-indent happy */
41 * Bandwidth (in/out) to assume initially (before either peer has
42 * communicated any particular preference). Should be rather low; set
43 * so that at least one maximum-size message can be send roughly once
46 #define GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT GNUNET_BANDWIDTH_value_init (1024)
49 * After how long do we consider a connection to a peer dead
50 * if we don't receive messages from the peer?
52 #define GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 5)
55 * How long do we delay reading more from a peer after a quota violation?
57 #define GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
60 * After how long do we consider a service unresponsive
61 * even if we assume that the service commonly does not
62 * respond instantly (DNS, Database, etc.).
64 #define GNUNET_CONSTANTS_SERVICE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 10)
67 * How long do we delay messages to get larger packet sizes (CORKing)?
69 #define GNUNET_CONSTANTS_MAX_CORK_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
72 * After what amount of latency for a message do we print a warning?
74 #define GNUNET_CONSTANTS_LATENCY_WARN GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
77 * Until which load do we consider the peer overly idle
78 * (which means that we would like to use more resources).<p>
80 * Note that we use 70 to leave some room for applications
81 * to consume resources "idly" (i.e. up to 85%) and then
82 * still have some room for "paid for" resource consumption.
84 #define GNUNET_CONSTANTS_IDLE_LOAD_THRESHOLD 70
87 * For how long do we allow unused bandwidth
88 * from the past to carry over into the future? (in seconds)
90 #define GNUNET_CONSTANTS_MAX_BANDWIDTH_CARRY_S 5
94 * After how long do we expire an address in a HELLO that we just
95 * validated? This value is also used for our own addresses when we
98 #define GNUNET_CONSTANTS_HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
102 * How long do we cache records at most in the DHT?
104 #define GNUNET_CONSTANTS_DHT_MAX_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 24)
108 * Size of the `struct EncryptedMessage` of the core (which
109 * is the per-message overhead of the core).
111 #define GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE (24 + sizeof (struct GNUNET_HashCode))
114 * What is the maximum size for encrypted messages? Note that this
115 * number imposes a clear limit on the maximum size of any message.
116 * Set to a value close to 64k but not so close that transports will
117 * have trouble with their headers.
119 * Could theoretically be 64k minus (#GNUNET_CONSTANTS_CORE_SIZE_ENCRYPTED_MESSAGE +
120 * #GNUNET_CONSTANTS_TRANSPORT_SIZE_OUTBOUND_MESSAGE), but we're going
121 * to be more conservative for now.
123 #define GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE (63 * 1024)
126 * Size of the CADET message overhead:
127 * = sizeof (struct GNUNET_CADET_TunnelEncryptedMessage)
128 * + sizeof (struct GNUNET_CADET_ChannelAppDataMessage)
129 * + sizeof (struct GNUNET_CADET_ConnectionEncryptedAckMessage))
131 * Checked for correcteness in gnunet-service-cadet_tunnel.c: GCT_init().
133 #define GNUNET_CONSTANTS_CADET_P2P_OVERHEAD 164
136 * Maximum message size that can be sent on CADET.
138 #define GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE \
139 (GNUNET_CONSTANTS_MAX_ENCRYPTED_MESSAGE_SIZE - GNUNET_CONSTANTS_CADET_P2P_OVERHEAD)
142 * Largest block that can be stored in the DHT.
144 #define GNUNET_CONSTANTS_MAX_BLOCK_SIZE (62 * 1024)
148 * K-value that must be used for the bloom filters in 'GET'
151 #define GNUNET_CONSTANTS_BLOOMFILTER_K 16
156 #if 0 /* keep Emacsens' auto-indent happy */
165 /** @} */ /* end of group */