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Move the itm reload to a single place rather than having two identical

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copies of the reload.  Note that we use the precomputed itm_reload value
so that we can avoid a division in the kernel.  The ia64 cpu does not
have integer divide, so this would have been done by a floating point
operation.
This commit is contained in:
peter 2003-01-06 01:53:55 +00:00
parent 584a6a5f1c
commit 1d946ebfc2
1 changed files with 2 additions and 2 deletions
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4
sys/ia64/ia64/interrupt.c
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@ -123,19 +123,19 @@ interrupt(u_int64_t vector, struct trapframe *framep)
intrcnt[INTRCNT_CLOCK]++; intrcnt[INTRCNT_CLOCK]++;
#endif #endif
critical_enter(); critical_enter();
/* Rearm so we get the next clock interrupt */
ia64_set_itm(ia64_get_itc() + itm_reload);
#ifdef SMP #ifdef SMP
clks[PCPU_GET(cpuid)]++; clks[PCPU_GET(cpuid)]++;
/* Only the BSP runs the real clock */ /* Only the BSP runs the real clock */
if (PCPU_GET(cpuid) == 0) { if (PCPU_GET(cpuid) == 0) {
#endif #endif
ia64_set_itm(ia64_get_itc() + itm_reload);
hardclock((struct clockframe *)framep); hardclock((struct clockframe *)framep);
/* divide hz (1024) by 8 to get stathz (128) */ /* divide hz (1024) by 8 to get stathz (128) */
if ((++schedclk2 & 0x7) == 0) if ((++schedclk2 & 0x7) == 0)
statclock((struct clockframe *)framep); statclock((struct clockframe *)framep);
#ifdef SMP #ifdef SMP
} else { } else {
ia64_set_itm(ia64_get_itc() + itm_reload);
mtx_lock_spin(&sched_lock); mtx_lock_spin(&sched_lock);
hardclock_process(curthread, TRAPF_USERMODE(framep)); hardclock_process(curthread, TRAPF_USERMODE(framep));
if ((schedclk2 & 0x7) == 0) if ((schedclk2 & 0x7) == 0)