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