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TIMER: Add mechanism to pre-calibrate the instruction execution rate

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This commit is contained in:
Mark Pizzolato
2019-05-28 23:56:58 -07:00
parent 48db10994d
commit f75f28aa21
9 changed files with 114 additions and 3 deletions
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3
sim_timer.h
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@@ -76,7 +76,7 @@ int clock_gettime(int clock_id, struct timespec *tp);
#define SIM_NTIMERS 8 /* # timers */
#define SIM_TMAX 500 /* max timer makeup */
#define SIM_INITIAL_IPS 500000 /* uncalibrated assumption */
#define SIM_INITIAL_IPS 5000000 /* uncalibrated assumption */
/* about instructions per second */
#define SIM_IDLE_CAL 10 /* ms to calibrate */
@@ -145,6 +145,7 @@ t_stat sim_clock_coschedule_abs (UNIT *uptr, int32 interval);
t_stat sim_clock_coschedule_tmr (UNIT *uptr, int32 tmr, int32 ticks);
t_stat sim_clock_coschedule_tmr_abs (UNIT *uptr, int32 tmr, int32 ticks);
double sim_timer_inst_per_sec (void);
void sim_timer_precalibrate_execution_rate (void);
int32 sim_rtcn_tick_size (int32 tmr);
int32 sim_rtcn_calibrated_tmr (void);
t_bool sim_timer_idle_capable (uint32 *host_ms_sleep_1, uint32 *host_tick_ms);