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MFi386: reduce apic clock interrupt rate

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This commit is contained in:
Peter Wemm 2005-03-11 22:12:38 +00:00
parent 0cd202bb09
commit 9e647d9629
1 changed files with 5 additions and 15 deletions
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20
sys/amd64/amd64/local_apic.c
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@ -67,9 +67,9 @@ CTASSERT(APIC_TIMER_INT < APIC_LOCAL_INTS);
CTASSERT(APIC_LOCAL_INTS == 240);
CTASSERT(IPI_STOP < APIC_SPURIOUS_INT);
#define LAPIC_TIMER_HZ_DIVIDER 3
#define LAPIC_TIMER_STATHZ_DIVIDER 23
#define LAPIC_TIMER_PROFHZ_DIVIDER 2
#define LAPIC_TIMER_HZ_DIVIDER 2
#define LAPIC_TIMER_STATHZ_DIVIDER 15
#define LAPIC_TIMER_PROFHZ_DIVIDER 3
/*
* Support for local APICs. Local APICs manage interrupts on each
@ -131,8 +131,6 @@ static u_int32_t lapic_timer_divisors[] = {
volatile lapic_t *lapic;
static u_long lapic_timer_divisor, lapic_timer_period, lapic_timer_hz;
static u_long *lapic_virtual_hardclock, *lapic_virtual_statclock,
*lapic_virtual_profclock;
static void lapic_enable(void);
static void lapic_timer_enable_intr(void);
@ -370,9 +368,6 @@ lapic_setup_clock(void)
stathz = lapic_timer_hz / LAPIC_TIMER_STATHZ_DIVIDER;
profhz = lapic_timer_hz / LAPIC_TIMER_PROFHZ_DIVIDER;
lapic_timer_period = value / lapic_timer_hz;
intrcnt_add("lapic: hardclock", &lapic_virtual_hardclock);
intrcnt_add("lapic: statclock", &lapic_virtual_statclock);
intrcnt_add("lapic: profclock", &lapic_virtual_profclock);
/*
* Start up the timer on the BSP. The APs will kick off their
@ -627,10 +622,9 @@ lapic_handle_timer(struct clockframe frame)
la->la_hard_ticks += hz;
if (la->la_hard_ticks >= lapic_timer_hz) {
la->la_hard_ticks -= lapic_timer_hz;
if (PCPU_GET(cpuid) == 0) {
(*lapic_virtual_hardclock)++;
if (PCPU_GET(cpuid) == 0)
hardclock(&frame);
} else
else
hardclock_process(&frame);
}
@ -638,8 +632,6 @@ lapic_handle_timer(struct clockframe frame)
la->la_stat_ticks += stathz;
if (la->la_stat_ticks >= lapic_timer_hz) {
la->la_stat_ticks -= lapic_timer_hz;
if (PCPU_GET(cpuid) == 0)
(*lapic_virtual_statclock)++;
statclock(&frame);
}
@ -647,8 +639,6 @@ lapic_handle_timer(struct clockframe frame)
la->la_prof_ticks += profhz;
if (la->la_prof_ticks >= lapic_timer_hz) {
la->la_prof_ticks -= lapic_timer_hz;
if (PCPU_GET(cpuid) == 0)
(*lapic_virtual_profclock)++;
if (profprocs != 0)
profclock(&frame);
}