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<timers.h> - add feature to time a code block

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. also minor compile fixes for it
This commit is contained in:
Ben Gras 2011-05-15 05:38:27 +02:00
parent cb13f32a7c
commit c02833ced6
2 changed files with 51 additions and 0 deletions
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50
common/include/timers.h
View file

@ -16,7 +16,11 @@
#define _TIMERS_H
#include <limits.h>
#include <minix/types.h>
#include <minix/u64.h>
#include <minix/minlib.h>
#include <minix/endpoint.h>
struct timer;
typedef void (*tmr_func_t)(struct timer *tp);
@ -59,5 +63,51 @@ _PROTOTYPE( void tmrs_exptimers, (timer_t **tmrs, clock_t now, clock_t *new_head
_PROTOTYPE( clock_t tmrs_settimer, (timer_t **tmrs, timer_t *tp,
clock_t exp_time, tmr_func_t watchdog, clock_t *new_head) );
#define PRINT_STATS(cum_spenttime, cum_instances) { \
if(ex64hi(cum_spenttime)) { printf(" ???\n"); } \
printf("%s:%d,%lu,%lu,%lu,%d.%04d%%\n", \
__FILE__, __LINE__, cum_instances, \
div64u(cum_spenttime, cum_instances), \
ex64lo(cum_spenttime), \
perc/10000, perc%10000); \
}
#define RESET_STATS(starttime, cum_instances, cum_spenttime, cum_starttime) { \
cum_instances = 0; \
cum_starttime = starttime; \
cum_spenttime = make64(0,0); \
}
#define TIME_BLOCK_VAR(timed_code_block, time_interval) do { \
static u64_t _cum_spenttime, _cum_starttime; \
static int _cum_instances; \
u64_t _next_cum_spent, _starttime, _endtime, _dt, _cum_dt; \
u32_t _dt_micros; \
int perc; \
read_tsc_64(&_starttime); \
do { timed_code_block } while(0); \
read_tsc_64(&_endtime); \
_dt = sub64(_endtime, _starttime); \
if(_cum_instances == 0) { \
RESET_STATS(_starttime, _cum_instances, _cum_spenttime, _cum_starttime); \
} \
_next_cum_spent = add64(_cum_spenttime, _dt); \
if(ex64hi(_next_cum_spent)) { \
PRINT_STATS(_cum_spenttime, _cum_instances); \
RESET_STATS(_starttime, _cum_instances, _cum_spenttime, _cum_starttime); \
} \
_cum_spenttime = add64(_cum_spenttime, _dt); \
_cum_instances++; \
_cum_dt = sub64(_endtime, _cum_starttime); \
perc=ex64lo(div64(mul64(_cum_spenttime,make64(1000000,0)), _cum_dt)); \
if(cmp64(_cum_dt, make64(0, 120)) > 0) { \
PRINT_STATS(_cum_spenttime, _cum_instances); \
RESET_STATS(_starttime, _cum_instances, _cum_spenttime, _cum_starttime); \
} \
} while(0)
#define TIME_BLOCK(timed_code_block) TIME_BLOCK_VAR(timed_code_block, 100)
#define TIME_BLOCK_T(timed_code_block, t) TIME_BLOCK_VAR(timed_code_block, t)
#endif /* _TIMERS_H */

1
lib/libc/arch/i386/math/arch_compare.c
View file

@ -1,4 +1,5 @@
#include <assert.h>
#include <minix/endpoint.h>
#include <math.h>
#include "fpu_cw.h"