Date: Wed, 22 Dec 2010 05:01:52 +0000 (UTC) From: David Xu <davidxu@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/lib/libthr/thread Makefile.inc thr_cond.c thr_init.c thr_kern.c thr_list.c thr_mutex.c thr_private.h thr_umtx.c thr_umtx.h src/sys/kern kern_umtx.c src/sys/sys _umtx.h umtx.h Message-ID: <201012220504.oBM54E8X046089@repoman.freebsd.org>
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davidxu 2010-12-22 05:01:52 UTC
FreeBSD src repository
Modified files:
lib/libthr/thread Makefile.inc thr_cond.c thr_init.c
thr_kern.c thr_list.c thr_mutex.c
thr_private.h thr_umtx.c thr_umtx.h
sys/kern kern_umtx.c
sys/sys _umtx.h umtx.h
Log:
SVN rev 216641 on 2010-12-22 05:01:52Z by davidxu
MFp4:
- Add flags CVWAIT_ABSTIME and CVWAIT_CLOCKID for umtx kernel based
condition variable, this should eliminate an extra system call to get
current time.
- Add sub-function UMTX_OP_NWAKE_PRIVATE to wake up N channels in single
system call. Create userland sleep queue for condition variable, in most
cases, thread will wait in the queue, the pthread_cond_signal will defer
thread wakeup until the mutex is unlocked, it tries to avoid an extra
system call and a extra context switch in time window of pthread_cond_signal
and pthread_mutex_unlock.
The changes are part of process-shared mutex project.
Revision Changes Path
1.21 +1 -0 src/lib/libthr/thread/Makefile.inc
1.29 +277 -100 src/lib/libthr/thread/thr_cond.c
1.59 +2 -0 src/lib/libthr/thread/thr_init.c
1.23 +92 -0 src/lib/libthr/thread/thr_kern.c
1.13 +4 -0 src/lib/libthr/thread/thr_list.c
1.80 +120 -82 src/lib/libthr/thread/thr_mutex.c
1.119 +106 -9 src/lib/libthr/thread/thr_private.h
1.21 +53 -0 src/lib/libthr/thread/thr_umtx.c
1.18 +11 -0 src/lib/libthr/thread/thr_umtx.h
1.92 +105 -15 src/sys/kern/kern_umtx.c
1.2 +2 -1 src/sys/sys/_umtx.h
1.35 +8 -3 src/sys/sys/umtx.h
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