Robert Watson 8dc10be885 Add some basic support for measuring sleep mutex contention to the ... mutex profiling code. As with existing mutex profiling, measurement is done with respect to mtx_lock() instances in the code, as opposed to specific mutexes. In particular, measure two things: (1) Lock contention. How often did this mtx_lock() call get made and have to sleep (or almost sleep) waiting for the lock. This helps identify the "victims" of contention. (2) Hold contention. How often, while the lock was held by a thread as a result of this mtx_lock(), did another thread try to acquire the same mutex. This helps identify the causes of contention. I'm currently exploring adding measurement of "time waited for the lock", but the current implementation has proven useful to me so far so I figured I'd commit it so others could try it out. Note that this increases the size of mutexes when MUTEX_PROFILING is enabled, so you might find you need to further bump UMA_BOOT_PAGES. Fixes welcome. The once over: des, others		2004-01-25 01:59:27 +00:00
..
alpha	- Remove local changes that leaked into my last commit.	2004-01-24 21:45:25 +00:00
amd64	- Recruit some new ULE users by making it the default scheduler in GENERIC.	2004-01-24 21:38:52 +00:00
arm	Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit	2003-09-25 01:10:26 +00:00
boot	If a transfer to or from a floppy disk crosses a 64k boundary, we have to	2004-01-21 23:22:29 +00:00
cam	Fix type in comment, 's/writtent/written/'	2004-01-18 00:17:14 +00:00
coda	- Implement selwakeuppri() which allows raising the priority of a	2003-11-09 09:17:26 +00:00
compat	Add structures and definitions for task offload (TCP/IP checksum,	2004-01-21 21:09:09 +00:00
conf	- ULE is not exactly experimental anymore. Change some comments and enable	2004-01-24 21:32:53 +00:00
contrib	This commit was generated by cvs2svn to compensate for changes in r124528,	2004-01-14 18:54:22 +00:00
crypto	avoid module name conflict with opencrypto/rijndael.c.	2003-11-12 04:22:37 +00:00
ddb	Reworked rev.1.14. Use the ELF symbol type again to summarily reject	2003-09-28 06:02:33 +00:00
dev	Correct KASSERT() in ndis_destroy(): ndis_mtx is a pointer now.	2004-01-25 00:13:07 +00:00
fs	Fix style(9) of my previous commit.	2004-01-21 18:03:54 +00:00
geom	Make sure to keep track of canceled events.	2004-01-23 21:09:38 +00:00
gnu	Copy workaround from FFS: open device for write access even if	2004-01-24 08:43:06 +00:00
i4b	Based on an excellent suggestion from tanimura@ define I4BPRI and use it	2003-11-10 14:20:34 +00:00
i386	- Recruit some new ULE users by making it the default scheduler in GENERIC.	2004-01-24 21:38:52 +00:00
ia64	- Recruit some new ULE users by making it the default scheduler in GENERIC.	2004-01-24 21:38:52 +00:00
isa	Significantly reduce the "jitter" that is typical for PS/2 mice	2003-12-11 11:28:11 +00:00
isofs/cd9660	Spell magic '16' number as IO_SEQSHIFT.	2004-01-19 20:03:43 +00:00
kern	Add some basic support for measuring sleep mutex contention to the	2004-01-25 01:59:27 +00:00
libkern	Translate from GNU C to ISO C.	2004-01-14 07:47:10 +00:00
modules	Removed custom "load" and "unload" targets.	2004-01-19 14:00:26 +00:00
net	Don't panic if there are more than 255 interfaces in the system.	2004-01-23 15:53:23 +00:00
net80211	Change WI_RID_SCAN_RES compatibility interface to return the result after	2004-01-19 05:25:43 +00:00
netatalk	Eliminate a duplicate free when deleting an interface address. This	2003-11-28 04:19:41 +00:00
netatm	Introduce a MAC label reference in 'struct inpcb', which caches	2003-11-18 00:39:07 +00:00
netgraph	Allow the socket buffer sizes to be controlled via sysctl(8).	2004-01-23 14:35:44 +00:00
netinet	Remove leftover FREE() from changes in rev 1.50.	2004-01-23 01:39:12 +00:00
netinet6	call ipsec_pcbconn()/ipsec_pcbdisconn() from in6_pcbconnect().	2004-01-13 10:45:02 +00:00
netipsec	Fix ipip_output() to always set *mp to NULL on failure, even if 'm'	2004-01-20 22:45:10 +00:00
netipx	Introduce a MAC label reference in 'struct inpcb', which caches	2003-11-18 00:39:07 +00:00
netkey	invalidate secpolicy pcb cache on key_timehandler. part of	2004-01-14 04:39:40 +00:00
netnatm	Introduce a MAC label reference in 'struct inpcb', which caches	2003-11-18 00:39:07 +00:00
netncp	The present defaults for the open and close for device drivers which	2003-09-27 12:01:01 +00:00
netsmb	Add support for SMB request signing, which prevents "man in the middle"	2004-01-02 22:38:42 +00:00
nfs	University of Michigan's Citi NFSv4 kernel client code.	2003-11-14 20:54:10 +00:00
nfs4client	This patch fixes two little portability (to !GCC compilers) problems:	2003-12-11 11:30:26 +00:00
nfsclient	Use function pointers to remove the depenancy cross dependancy on nfs4	2003-11-22 02:21:49 +00:00
nfsserver	Fix some becuase -> because typos.	2003-12-17 16:12:01 +00:00
opencrypto	style(9) pass and type fixups.	2003-12-16 14:13:47 +00:00
pc98	- Recruit some new ULE users by making it the default scheduler in GENERIC.	2004-01-24 21:38:52 +00:00
pccard	- Implement selwakeuppri() which allows raising the priority of a	2003-11-09 09:17:26 +00:00
pci	Fix multicast and promiscuous mode handling for Yukon devices.	2004-01-21 22:32:15 +00:00
posix4
powerpc	- Recruit some new ULE users by making it the default scheduler in GENERIC.	2004-01-24 21:38:52 +00:00
rpc	Don't panic because of RPC proto mismatches. Whitespace cleanup.	2004-01-17 21:25:05 +00:00
security	Pay attention to mac_portacl_enabled.	2004-01-20 18:33:02 +00:00
sparc64	- Recruit some new ULE users by making it the default scheduler in GENERIC.	2004-01-24 21:38:52 +00:00
sys	Add some basic support for measuring sleep mutex contention to the	2004-01-25 01:59:27 +00:00
tools	Changes for new SMP-safe kobj method dispatch algorithm.	2003-10-16 13:29:26 +00:00
ufs	Copy comment about caller check from ffs_read to ffs_extread, don't	2004-01-23 06:00:41 +00:00
vm	1. Statically initialize swap_pager_full and swap_pager_almost_full to the	2004-01-24 21:31:06 +00:00
Makefile	Replaced outdated comment.	2004-01-17 03:28:27 +00:00