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opnsense-src/lib
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David Xu 7416cdabcd Add my recent work of adaptive spin mutex code. Use two environments variable 
to tune pthread mutex performance:
1. LIBPTHREAD_SPINLOOPS
	If a pthread mutex is being locked by another thread, this environment
	variable sets total number of spin loops before the current thread
	sleeps in kernel, this saves a syscall overhead if the mutex will be
	unlocked very soon (well written application code).
2. LIBPTHREAD_YIELDLOOPS
	If a pthread mutex is being locked by other threads, this environment
	variable sets total number of sched_yield() loops before the currrent
	thread sleeps in kernel. if a pthread mutex is locked, the current thread
	gives up cpu, but will not sleep in kernel, this means, current thread
	does not set contention bit in mutex, but let lock owner to run again
	if the owner is on kernel's run queue, and when lock owner unlocks the
	mutex, it does not need to enter kernel and do lots of work to resume
	mutex waiters, in some cases, this saves lots of syscall overheads for
	mutex owner.

In my practice, sometimes LIBPTHREAD_YIELDLOOPS can massively improve performance
than LIBPTHREAD_SPINLOOPS, this depends on application. These two environments
are global to all pthread mutex, there is no interface to set them for each
pthread mutex, the default values are zero, this means spinning is turned off
by default.
2007-10-30 05:57:37 +00:00
..
bind Remove the special atomic.h case for arm, and allow it to use 2007-06-05 22:17:16 +00:00
csu Fix TLS on sparc64 for statically and dynamically linked binaries 2006-10-08 02:50:34 +00:00
libalias - Bump share library version which were missed in last bump 2007-06-18 18:47:54 +00:00
libarchive When skipping input data, don't overflow a 32-bit size_t. 2007-10-27 22:45:40 +00:00
libatm Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libautofs Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libbegemot Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libbluetooth Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libbsm Install getaudit_addr(2) and setaudit_addr(2) links to getaudit(2) and 2007-10-19 10:37:34 +00:00
libbsnmp - Bump share library version which were missed in last bump 2007-06-18 18:47:54 +00:00
libbz2 Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libc Back out 2nd part of wrong iswascii() change in prev. commit. 2007-10-23 17:39:28 +00:00
libc_r Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libcalendar Mechanically kill hard sentence breaks. 2004-07-02 23:52:20 +00:00
libcam 2nd and final commit that moves us to CAM_NEW_TRAN_CODE 2006-11-02 00:54:38 +00:00
libcom_err
libcompat Remove California Regent's clause 3, per letter 2007-01-09 01:02:06 +00:00
libcrypt Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libdevinfo Markup fixes. 2006-09-17 21:27:35 +00:00
libdevstat Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libdisk Translate partitions of type "PART" to chunks of the same type 2007-09-21 16:24:01 +00:00
libedit Merge NetBSD changes, among them: 2007-06-10 19:06:09 +00:00
libelf Consistently use the word 'flag' to refer to ELF_F_* constants. 2007-10-22 03:38:43 +00:00
libexpat Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libfetch Enable FTP_COMBINE_CWDS. 2007-05-24 20:28:14 +00:00
libftpio Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libgeom Remove parameter names from prototypes to avoid namespace issues. 2007-05-06 10:00:27 +00:00
libgpib Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libgssapi If the mech_type argument to gss_display_status is null, use a default 2007-07-05 13:40:07 +00:00
libipsec Commit IPv6 support for FAST_IPSEC to the tree. 2007-07-01 12:08:08 +00:00
libipx Remove California Regent's clause 3, per letter 2007-01-09 01:02:06 +00:00
libkiconv Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libkse Add a new "non-portable" mutex type, PTHREAD_MUTEX_ADAPTIVE_NP. This 2007-10-29 21:01:47 +00:00
libkvm Aparrently MACXOCOMLEN exisrts only on my machine 2007-10-26 15:25:28 +00:00
libmagic FreeBSD has <limits.h>. 2007-05-24 22:10:22 +00:00
libmd Use unsigned comparisons. Prior to this commit, SHA1_Update and 2007-05-14 05:00:37 +00:00
libmemstat Make pointer argument to kread_string() const since the kernel structure 2007-05-21 18:16:04 +00:00
libmilter New files in sendmail 8.14.1 2007-04-09 01:45:30 +00:00
libmp Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libncp Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libnetgraph Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libngatm Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libopie Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libpam Correct documentation of ~/.opiealways 2007-10-26 07:50:11 +00:00
libpcap Update for libpcap 0.9.8 import 2007-10-16 02:10:44 +00:00
libpmc Fix a bug in the description of the "p6-div" event. [1] 2007-04-12 09:16:54 +00:00
libradius Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
librpcsvc Reimplementation of world/kernel build options. For details, see: 2006-03-17 18:54:44 +00:00
librt Enable symbol versioning by default. Use WITHOUT_SYMVER to disable it. 2007-05-13 14:12:40 +00:00
libsbuf style.Makefile(5) 2003-08-18 15:25:39 +00:00
libsdp Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libsm New files in sendmail 8.14.1 2007-04-09 01:45:30 +00:00
libsmb Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libsmdb For variables that are only checked with defined(), don't provide 2004-10-24 15:33:08 +00:00
libsmutil For variables that are only checked with defined(), don't provide 2004-10-24 15:33:08 +00:00
libstand First cut at support for booting a GPT labeled disk via the BIOS bootstrap 2007-10-24 21:33:00 +00:00
libtacplus Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libtelnet Stop enforcing dependencies between MK_* options at Makefile level. 2006-07-31 13:29:36 +00:00
libthr Add my recent work of adaptive spin mutex code. Use two environments variable 2007-10-30 05:57:37 +00:00
libthread_db Include string.h for memcpy() and memcmp(). 2007-05-25 13:43:14 +00:00
libufs The ufs_disk_fillout(3) can take special device name (with or without /dev/ 2007-03-16 03:13:28 +00:00
libugidfw Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libusbhid Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libutil Minor mdoc cleanup: Every sentence should start on its own line. 2007-10-13 11:09:45 +00:00
libvgl Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libwrap Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
liby Remove California Regent's clause 3, per letter 2007-01-09 01:02:06 +00:00
libypclnt Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00
libz Resolve conflicts. 2006-03-23 14:09:21 +00:00
msun Oops, back out previous commit since it was backwards to a wrong branch. 2007-06-14 05:57:13 +00:00
ncurses - Convert NO_INSTALLLIB option to a new syntax: makefiles should 2007-10-20 19:01:50 +00:00
Makefile Add a period for yar@. 2007-10-26 11:07:25 +00:00
Makefile.inc Bump library versions in preparation for 7.0. 2007-05-21 02:49:08 +00:00