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Asynchronous Timer Support
scp.c, scp.h
- Change the sim_clock_queue event list to be terminated by the value QUEUE_LIST_END instead of NULL. This allows easy determination of whether a unit is on a list since when it is not on a list the next pointer is NULL.
- standardized the usage of UPDATE_SIM_TIME
- Added support for internal/pseudo devices to support the TIMER and CON-TEL pseudo devices (to enable and disable debugging)
- Reverted to the prior "SET CONSOLE DEBUG" command semantics since the console debug can be manipulated via the generic "SET <dev> DEBUG" command (i.e. SET CON-TEL DEBUG=TRC;XMT;RCV)
- Changed "SHOW TIMERS" to "SHOW CLOCKS" to display the current calibrated timer information
- Added sim_is_active_bool API to return the boolean active status avoiding the potential work walking the list when most callers aren't interested in the event firing time
- Fixed run_boot_prep to properly record the not queued status of any units which are removed from the sim_clock_queue during initialization
- Added display of DEBUG, NODEBUG options to the SHOW SHOW command
sim_timer.c, sim_timer.h
- Added asynchronous timer capabilities with support for calibration and idling
- Added internal/pseudo device to support debugging of Idle, Calibration and asynch timer activites.
- Added suppression of timer calibration when idling has occurred
sim_tmxr.c, sim_tmxr.h
- Added tmxr_activate_after and macro definition for sim_activate_after to invoke it for proper behavior with multiplexer devices
- Added all polling units to the standard timer queue when dropping back to the simulator command prompt to accommodate the potential to disable asynch mode
- Fixed synchronization to operate with pthread synchronized asynch queue and proper stopping of poll when dropping back to the simulator command prompt
- Fixed calls to select to have a timeout with properly ranged tv_usec values and dealt with possible EINTR return from select
sim_console.c, sim_console.h
- Changed internal/pseudo console telnet device name to CON=TEL
- Reverted to the prior "SET CONSOLE DEBUG" command semantics since the console debug can be manipulated via the generic "SET <dev> DEBUG" command (i.e. SET CON-TEL DEBUG=TRC;XMT;RCV)
- Fixed synchronization to operate with pthread synchronized asynch queue and proper stopping of poll when dropping back to the simulator command prompt
- Fixed calls to select to have a timeout with properly ranged tv_usec values
sim_defs.h
- Added necessary unit fields to support asynchronous timing activities
- Added asynchronous macros to support async timing activities
- Fixed asynch pthread only macros (not using AIO_INTRINSICS).
- Fixed the definition of the UDATA macro which was never adjusted to accommodate the insertion of 2 extra fields in the unit structure and thus made the initialization of the unit wait field meaningless.
- Changed the NOQUEUE_WAIT value from 10000 to 1000000. This is only used when the sim_clock_queue is empty, which normally never happens on any simulator since they all have clocks and/or other frequently polling devices. With asynchronous multiplexer and timing support the queue is often empty and this value is then used when calculating idling delays. If it is too small, idling will be inefficient. Being large should not be a problem otherwise.
Interdata/id16_cpu.c
- removed test of sim_idle_enab before calling sim_idle
Interdata/id32_cpu.c
- removed test of sim_idle_enab before calling sim_idle
vax/vax_cpu.c
- removed test of sim_idle_enab before calling sim_idle
vax/vax_stddev.c
- converted CLK device to use the internal timer service API sim_activate_after to leverage asynchronous timing when available
This commit is contained in:
Mark Pizzolato
54
sim_timer.h
54
sim_timer.h
@@ -58,35 +58,44 @@ int clock_gettime(int clock_id, struct timespec *tp);
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#endif
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#define SIM_NTIMERS 8 /* # timers */
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#define SIM_TMAX 500 /* max timer makeup */
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#define SIM_NTIMERS 8 /* # timers */
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#define SIM_TMAX 500 /* max timer makeup */
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#define SIM_IDLE_CAL 10 /* ms to calibrate */
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#define SIM_IDLE_MAX 10 /* max granularity idle */
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#define SIM_IDLE_STMIN 10 /* min sec for stability */
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#define SIM_IDLE_STDFLT 20 /* dft sec for stability */
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#define SIM_IDLE_STMAX 600 /* max sec for stability */
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#define SIM_INITIAL_IPS 50000 /* uncalibrated assumption */
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/* about instructions per second */
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#define SIM_THROT_WINIT 1000 /* cycles to skip */
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#define SIM_THROT_WST 10000 /* initial wait */
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#define SIM_THROT_WMUL 4 /* multiplier */
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#define SIM_THROT_WMIN 100 /* min wait */
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#define SIM_THROT_MSMIN 10 /* min for measurement */
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#define SIM_THROT_NONE 0 /* throttle parameters */
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#define SIM_THROT_MCYC 1 /* MegaCycles Per Sec */
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#define SIM_THROT_KCYC 2 /* KiloCycles Per Sec */
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#define SIM_THROT_PCT 3 /* Max Percent of host CPU */
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#define SIM_THROT_SPC 4 /* Specific periodic Delay */
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#define SIM_IDLE_CAL 10 /* ms to calibrate */
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#define SIM_IDLE_MAX 10 /* max granularity idle */
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#define SIM_IDLE_STMIN 10 /* min sec for stability */
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#define SIM_IDLE_STDFLT 20 /* dft sec for stability */
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#define SIM_IDLE_STMAX 600 /* max sec for stability */
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#define SIM_THROT_WINIT 1000 /* cycles to skip */
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#define SIM_THROT_WST 10000 /* initial wait */
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#define SIM_THROT_WMUL 4 /* multiplier */
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#define SIM_THROT_WMIN 100 /* min wait */
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#define SIM_THROT_MSMIN 10 /* min for measurement */
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#define SIM_THROT_NONE 0 /* throttle parameters */
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#define SIM_THROT_MCYC 1 /* MegaCycles Per Sec */
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#define SIM_THROT_KCYC 2 /* KiloCycles Per Sec */
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#define SIM_THROT_PCT 3 /* Max Percent of host CPU */
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#define SIM_THROT_SPC 4 /* Specific periodic Delay */
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#define TIMER_DBG_IDLE 1 /* Debug Flag for Idle Debugging */
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#define TIMER_DBG_QUEUE 2 /* Debug Flag for Asynch Queue Debugging */
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t_bool sim_timer_init (void);
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void sim_timespec_diff (struct timespec *diff, struct timespec *min, struct timespec *sub);
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#if defined(SIM_ASYNCH_IO)
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double sim_timenow_double (void);
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#endif
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int32 sim_rtcn_init (int32 time, int32 tmr);
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void sim_rtcn_init_all (void);
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int32 sim_rtcn_calb (int32 ticksper, int32 tmr);
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int32 sim_rtc_init (int32 time);
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int32 sim_rtc_calb (int32 ticksper);
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t_stat sim_show_timers (FILE* st, DEVICE *dptr, UNIT* uptr, int32 val, char* desc);
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t_bool sim_idle (uint32 tmr, t_bool sin_cyc);
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t_bool sim_idle (int32 tmr, t_bool sin_cyc);
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t_stat sim_set_throt (int32 arg, char *cptr);
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t_stat sim_show_throt (FILE *st, DEVICE *dnotused, UNIT *unotused, int32 flag, char *cptr);
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t_stat sim_set_idle (UNIT *uptr, int32 val, char *cptr, void *desc);
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@@ -98,11 +107,14 @@ uint32 sim_os_msec (void);
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void sim_os_sleep (unsigned int sec);
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uint32 sim_os_ms_sleep (unsigned int msec);
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uint32 sim_os_ms_sleep_init (void);
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void sim_start_timer_services (void);
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void sim_stop_timer_services (void);
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t_stat sim_timer_change_asynch (void);
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t_stat sim_timer_activate_after (UNIT *uptr, int32 usec_delay);
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int32 sim_timer_inst_per_sec (void);
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extern t_bool sim_idle_enab; /* idle enabled flag */
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extern volatile t_bool sim_idle_wait; /* idle waiting flag */
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extern int32 *sim_tmr_poll; /* pointer to instructions per clock tick */
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extern int32 *sim_clk_tps; /* pointer to clock ticks per second */
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extern DEVICE sim_timer_dev;
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#endif
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