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- Proc locking.

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- P_FOO -> PS_FOO.
This commit is contained in:
John Baldwin 2001-01-24 10:43:25 +00:00
parent f202965e95
commit 01cd094c32
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=71556
1 changed files with 20 additions and 7 deletions
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27
sys/kern/kern_clock.c
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@ -170,13 +170,17 @@ hardclock(frame)
if (CLKF_USERMODE(frame) &&
timevalisset(&pstats->p_timer[ITIMER_VIRTUAL].it_value) &&
itimerdecr(&pstats->p_timer[ITIMER_VIRTUAL], tick) == 0) {
p->p_flag |= P_ALRMPEND;
mtx_enter(&sched_lock, MTX_SPIN);
p->p_sflag |= PS_ALRMPEND;
aston();
mtx_exit(&sched_lock, MTX_SPIN);
}
if (timevalisset(&pstats->p_timer[ITIMER_PROF].it_value) &&
itimerdecr(&pstats->p_timer[ITIMER_PROF], tick) == 0) {
p->p_flag |= P_PROFPEND;
mtx_enter(&sched_lock, MTX_SPIN);
p->p_sflag |= PS_PROFPEND;
aston();
mtx_exit(&sched_lock, MTX_SPIN);
}
}
@ -283,8 +287,14 @@ startprofclock(p)
{
int s;
if ((p->p_flag & P_PROFIL) == 0) {
p->p_flag |= P_PROFIL;
/*
* XXX; Right now sched_lock protects statclock(), but perhaps
* it should be protected later on by a time_lock, which would
* cover psdiv, etc. as well.
*/
mtx_enter(&sched_lock, MTX_SPIN);
if ((p->p_sflag & PS_PROFIL) == 0) {
p->p_sflag |= PS_PROFIL;
if (++profprocs == 1 && stathz != 0) {
s = splstatclock();
psdiv = pscnt = psratio;
@ -292,6 +302,7 @@ startprofclock(p)
splx(s);
}
}
mtx_exit(&sched_lock, MTX_SPIN);
}
/*
@ -303,8 +314,9 @@ stopprofclock(p)
{
int s;
if (p->p_flag & P_PROFIL) {
p->p_flag &= ~P_PROFIL;
mtx_enter(&sched_lock, MTX_SPIN);
if (p->p_sflag & PS_PROFIL) {
p->p_sflag &= ~PS_PROFIL;
if (--profprocs == 0 && stathz != 0) {
s = splstatclock();
psdiv = pscnt = 1;
@ -312,6 +324,7 @@ stopprofclock(p)
splx(s);
}
}
mtx_exit(&sched_lock, MTX_SPIN);
}
/*
@ -342,7 +355,7 @@ statclock(frame)
* If this process is being profiled, record the tick.
*/
p = curproc;
if (p->p_flag & P_PROFIL)
if (p->p_sflag & PS_PROFIL)
addupc_intr(p, CLKF_PC(frame), 1);
#if defined(SMP) && defined(BETTER_CLOCK)
if (stathz != 0)