arch/util/machine-xpmem.C File Reference

There are three options here for synchronization: XPMEM_FENCE is the default. More...

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Data Structures
struct	sharedBufHeader
	This struct is used as the first portion of a shared memory region, followed by data. More...
struct	sharedBufData
struct	OutgoingMsgRec
struct	XpmemSendQ
struct	XpmemContext
Enumerations
enum	entities { SENDER, RECEIVER, SENDER, RECEIVER }
Functions
void	calculateNodeSizeAndRank (char **)
void	setupSharedBuffers (void)
void	initAllSendQs (void)
void	CmiExitXpmem (void)
static void	cleanupOnAllSigs (int signo)
void	CmiInitXpmem (char **argv)
void	tearDownSharedBuffers (void)
void	freeSharedBuffers (void)
static int	CmiValidXpmem (int node, int size)
int	XpmemRank (int dstnode)
void	pushSendQ (XpmemSendQ *q, char *msg, int size, int *refcount)
int	sendMessage (char *msg, int size, int *refcount, sharedBufData *dstBuf, XpmemSendQ *dstSendQ)
int	flushSendQ (XpmemSendQ *sendQ)
int	sendMessageRec (OutgoingMsgRec *omg, sharedBufData *dstBuf, XpmemSendQ *dstSendQ)
void	CmiSendMessageXpmem (char *msg, int size, int dstnode, int *refcount)
Variables
static int	XPMEMBUFLEN = (1024*1024*4)
static int	SENDQSTARTSIZE = 256
static int	sendQ_head_index = -1
XpmemContext *	xpmemContext = NULL
static int	xpmem_fd
static int	pxshm_freed = 0

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Detailed Description

There are three options here for synchronization: XPMEM_FENCE is the default.

It uses memory fences XPMEM_OSSPINLOCK will cause OSSpinLock's to be used (available on OSX) XPMEM_LOCK will cause POSIX semaphores to be used

created by Gengbin Zheng, September 2011

Definition in file machine-xpmem.C.