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34 #ifndef VCHI_CFG_INTERNAL_H_
35 #define VCHI_CFG_INTERNAL_H_
37 /****************************************************************************************
38 * Control optimisation attempts.
39 ***************************************************************************************/
41 // Don't use lots of short-term locks - use great long ones, reducing the overall locks-per-second
42 #define VCHI_COARSE_LOCKING
44 // Avoid lock then unlock on exit from blocking queue operations (msg tx, bulk rx/tx)
45 // (only relevant if VCHI_COARSE_LOCKING)
46 #define VCHI_ELIDE_BLOCK_EXIT_LOCK
48 // Avoid lock on non-blocking peek
49 // (only relevant if VCHI_COARSE_LOCKING)
50 #define VCHI_AVOID_PEEK_LOCK
52 // Use one slot-handler thread per connection, rather than 1 thread dealing with all connections in rotation.
53 #define VCHI_MULTIPLE_HANDLER_THREADS
55 // Put free descriptors onto the head of the free queue, rather than the tail, so that we don't thrash
56 // our way through the pool of descriptors.
57 #define VCHI_PUSH_FREE_DESCRIPTORS_ONTO_HEAD
59 // Don't issue a MSG_AVAILABLE callback for every single message. Possibly only safe if VCHI_COARSE_LOCKING.
60 #define VCHI_FEWER_MSG_AVAILABLE_CALLBACKS
62 // Don't use message descriptors for TX messages that don't need them
63 #define VCHI_MINIMISE_TX_MSG_DESCRIPTORS
65 // Nano-locks for multiqueue
66 //#define VCHI_MQUEUE_NANOLOCKS
68 // Lock-free(er) dequeuing
69 //#define VCHI_RX_NANOLOCKS
71 #endif /*VCHI_CFG_INTERNAL_H_*/