Date: Mon, 26 Aug 2002 17:55:50 -0700 (PDT) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 16621 for review Message-ID: <200208270055.g7R0to80059950@freefall.freebsd.org>
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http://people.freebsd.org/~peter/p4db/chv.cgi?CH=16621 Change 16621 by peter@peter_mckinley on 2002/08/26 17:55:15 slight optimization. Precalculate the reload amount once, since we do not have integer divide. Affected files ... .. //depot/projects/ia64/sys/ia64/ia64/clock.c#8 edit .. //depot/projects/ia64/sys/ia64/ia64/interrupt.c#13 edit .. //depot/projects/ia64/sys/ia64/ia64/mp_machdep.c#20 edit .. //depot/projects/ia64/sys/ia64/include/clock.h#3 edit Differences ... ==== //depot/projects/ia64/sys/ia64/ia64/clock.c#8 (text+ko) ==== @@ -78,10 +78,9 @@ int adjkerntz; /* local offset from GMT in seconds */ int disable_rtc_set; /* disable resettodr() if != 0 */ int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */ +u_int64_t itm_reload; /* reload ticks for clock */ static int beeping = 0; -extern u_int64_t itc_frequency; - #ifndef SMP static timecounter_get_t ia64_get_timecount; @@ -192,7 +191,8 @@ tc_init(&ia64_timecounter); #endif - ia64_set_itm(ia64_get_itc() + (itc_frequency + hz/2) / hz); + itm_reload = (itc_frequency + hz/2) / hz; + ia64_set_itm(ia64_get_itc() + itm_reload); ia64_set_itv(255); /* highest priority class */ stathz = 128; ==== //depot/projects/ia64/sys/ia64/ia64/interrupt.c#13 (text+ko) ==== @@ -87,7 +87,6 @@ static u_int schedclk2; -extern u_int64_t itc_frequency; void interrupt(u_int64_t vector, struct trapframe *framep) @@ -128,7 +127,7 @@ statclock((struct clockframe *)framep); #ifdef SMP } else { - ia64_set_itm(ia64_get_itc() + (itc_frequency + hz/2) / hz); + ia64_set_itm(ia64_get_itc() + itm_reload); mtx_lock_spin(&sched_lock); hardclock_process(curthread, TRAPF_USERMODE(framep)); if ((schedclk2 & 0x7) == 0) ==== //depot/projects/ia64/sys/ia64/ia64/mp_machdep.c#20 (text+ko) ==== @@ -58,7 +58,6 @@ void ia64_ap_startup(void); -extern u_int64_t itc_frequency; extern vm_offset_t vhpt_base, vhpt_size; #define LID_SAPIC_ID(x) ((int)((x) >> 24) & 0xff) @@ -119,7 +118,7 @@ mtx_lock_spin(&sched_lock); /* kick off the clock on this AP */ - ia64_set_itm(ia64_get_itc() + (itc_frequency + hz/2) / hz); + ia64_set_itm(ia64_get_itc() + itm_reload); ia64_set_itv(255); cpu_throw(); panic("ia64_ap_startup: cpu_throw() returned"); ==== //depot/projects/ia64/sys/ia64/include/clock.h#3 (text+ko) ==== @@ -15,6 +15,9 @@ extern int wall_cmos_clock; extern int adjkerntz; +extern u_int64_t itc_frequency; +extern u_int64_t itm_reload; + int sysbeep(int pitch, int period); int acquire_timer2(int mode); int release_timer2(void); To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe p4-projects" in the body of the message
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