From 38161ac76efe4c50f13e244903a44645023fec83 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 14 Jun 2000 06:13:45 +0000 Subject: Update. 2000-06-13 Kaz Kylheku A few optimizations. Got rid of unnecessary wakeups of timer threads, tightened up some critical regions and micro-optimized some list manipulation code. * sysdeps/pthread/timer_routines.c (__timer_thread_queue_timer): Returns int value now to indicate whether timer was queued at head. * sysdeps/pthread/posix-timer.h: Likewise. * sysdeps/pthread/timer_settime.c (timer_settime): Takes advantage of new return value from __timer_thread_queue_timer to avoid waking up timer thread unnecessarily. * sysdeps/pthread/posix-timer.h (timer_id2ptr): No longer checks inuse flag, because this requires mutex to be held. Callers updated to do the check when they have the mutex. * sysdeps/pthread/timer_getoverr.c: Add check for inuse here. * sysdeps/pthread/timer_settime.c (timer_settime): Tighter critical regions: avoids making system calls while holding timer mutex, and a few computations were moved outside of the mutex as well. * sysdeps/pthread/timer_gettime.c (timer_gettime): Likewise. * sysdeps/pthread/posix-timer.h (list_unlink_ip): Function name changed to list_unlink_ip, meaning idempotent. Pointer manipulation changed to get better better code out of gcc. * sysdeps/pthread/timer_routines.c (list_unlink): Non-idempotent version of list_unlink added here. * sysdeps/pthread/timer_delete.c: Use appropriate list unlink function in all places: idempotent one for timers, non-idempotent one for thread nodes. * sysdeps/pthread/timer_settime: Likewise. * sysdeps/pthread/timer_routines.c: Likewise. --- linuxthreads/ChangeLog | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'linuxthreads/ChangeLog') diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog index 795c064f90..121eceb83e 100644 --- a/linuxthreads/ChangeLog +++ b/linuxthreads/ChangeLog @@ -1,3 +1,37 @@ +2000-06-13 Kaz Kylheku + + A few optimizations. Got rid of unnecessary wakeups of timer threads, + tightened up some critical regions and micro-optimized some list + manipulation code. + + * sysdeps/pthread/timer_routines.c (__timer_thread_queue_timer): + Returns int value now to indicate whether timer was queued at head. + * sysdeps/pthread/posix-timer.h: Likewise. + * sysdeps/pthread/timer_settime.c (timer_settime): Takes advantage of + new return value from __timer_thread_queue_timer to avoid waking + up timer thread unnecessarily. + + * sysdeps/pthread/posix-timer.h (timer_id2ptr): No longer checks + inuse flag, because this requires mutex to be held. Callers updated + to do the check when they have the mutex. + * sysdeps/pthread/timer_getoverr.c: Add check for inuse here. + + * sysdeps/pthread/timer_settime.c (timer_settime): Tighter critical + regions: avoids making system calls while holding timer mutex, and + a few computations were moved outside of the mutex as well. + * sysdeps/pthread/timer_gettime.c (timer_gettime): Likewise. + + * sysdeps/pthread/posix-timer.h (list_unlink_ip): Function name changed + to list_unlink_ip, meaning idempotent. Pointer manipulation + changed to get better better code out of gcc. + * sysdeps/pthread/timer_routines.c (list_unlink): Non-idempotent + version of list_unlink added here. + * sysdeps/pthread/timer_delete.c: Use appropriate list unlink + function in all places: idempotent one for timers, non-idempotent + one for thread nodes. + * sysdeps/pthread/timer_settime: Likewise. + * sysdeps/pthread/timer_routines.c: Likewise. + 2000-06-13 Ulrich Drepper * sysdeps/unix/sysv/linux/bits/posix_opt.h (_POSIX_TIMERS): Define. -- cgit v1.2.3