#define		GSNAME	"pvmgs"
#define		DIE		0	/* halt the group server */
#define		JOIN	1	/* join a group */
#define		LEAVE	2	/* leave a group */
#define		BARRIER	3	/* group barrier */
#define		BCAST	4	/* broadcast to a group */
#define		GETINST	5	/* get the group instance number given the task id */
#define		GETTID	6	/* get the task id given the group instance number */
#define		GSIZE	7	/* get the group size */
#define		RESET	8	/* reset the group server */
#define		DUMP	9	/* dump the state */
#define		GSLS	10	/* send back a list of the groups */
#define		DEADTID	11	/* notify tag used when a task in a group dies */
#define		TIDLIST 12	/* get list of tids for group */
