cluster/group/gfs_controld main.c plock.c

[teigland@sourceware.org]

CVSROOT:	/cvs/cluster
Module name:	cluster
Branch: 	RHEL5
Changes by:	teigland@sourceware.org	2006-11-14 20:33:33

Modified files:
	group/gfs_controld: main.c plock.c 

Log message:
	Add plock rate limit option -l <limit>.  Current default is no limit (0).
	If a limit is set, gfs_controld will send no more than <limit> plock
	operations (multicast messages) every second.
	
	Given a limit of 10, one file system where plocks are used, and a program
	that does a tight loop of fcntl lock/unlock operations, the max number of
	loop iterations in 1 second would be 5.  If eight nodes were all doing
	this there would be 80 total network multicasts every second from all
	nodes in the cluster.
	
	We also record the volume of plock messages accepted locally and received
	from the network in the debug log.  A log entry is written for every
	1000 locally accepted plock operations and for every 1000 operations
	received from the network.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/main.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.18&r2=1.18.2.1
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/plock.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.25&r2=1.25.2.1