GPipe

Inter communication between GPU processes invoked from different CPU processes using the new low level NVIDIA API.

Definitions

• Three element gpipe - a simple solution, for performance comparcence. The solution uses Linux named pipe to pass communication through the CPU
• Naive solution - communication between GPU processec invoked from the same CPU process

API

// The GPipe constructor
// Parameters:
// - pipe_name - The GPipe name. must be unique per pipe instance
// - is_consumer - Is the caller a consumer (Consumer or Producer)
// - size_multiplier – Max number of messages per thread in the buffer
GPipe(const char* pipe_name, bool is_consumer, int size_multiplier);

// The GPipe destructor
// Close the communication and perform cleanup
void gclose();

// Initialize the pipe. 
// Must be called from both pipe ends
void init();

// Read message from pipe
// Parameters:
// - message - Pointer to the reader's buffer
// Copies the message to the reader's buffer. All the kernel 
// thread must call this function to read the messages.
// Returns only when all the kernel threads receive a message
void gread(message_t* message);


// Write message to pipe
// Parameters:
// - message - Pointer to the message
// Copies the message to the pipe buffer.
// Blocking until the buffer has a writing slot
void gwrite(message_t* message);