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SCP: Fix throttling to provide reasonable operation of calibrated clocks

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- Generate reasonable messages when presented with erroneous throttle input.
- Add throttling recalibration logic if only if target rate drift exceeds 5%
This commit is contained in:
Mark Pizzolato
2016-09-14 14:12:24 -07:00
parent 89ffed467f
commit a008b0a972
2 changed files with 71 additions and 36 deletions
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21
sim_timer.h
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@@ -85,16 +85,17 @@ int clock_gettime(int clock_id, struct timespec *tp);
#define SIM_IDLE_STDFLT 20 /* dft sec for stability */
#define SIM_IDLE_STMAX 600 /* max sec for stability */
#define SIM_THROT_WINIT 1000 /* cycles to skip */
#define SIM_THROT_WST 10000 /* initial wait */
#define SIM_THROT_WMUL 4 /* multiplier */
#define SIM_THROT_WMIN 100 /* min wait */
#define SIM_THROT_MSMIN 10 /* min for measurement */
#define SIM_THROT_NONE 0 /* throttle parameters */
#define SIM_THROT_MCYC 1 /* MegaCycles Per Sec */
#define SIM_THROT_KCYC 2 /* KiloCycles Per Sec */
#define SIM_THROT_PCT 3 /* Max Percent of host CPU */
#define SIM_THROT_SPC 4 /* Specific periodic Delay */
#define SIM_THROT_WINIT 1000 /* cycles to skip */
#define SIM_THROT_WST 10000 /* initial wait */
#define SIM_THROT_WMUL 4 /* multiplier */
#define SIM_THROT_WMIN 100 /* min wait */
#define SIM_THROT_DRIFT_PCT 5 /* drift percentage for recalibrate */
#define SIM_THROT_MSMIN 10 /* min for measurement */
#define SIM_THROT_NONE 0 /* throttle parameters */
#define SIM_THROT_MCYC 1 /* MegaCycles Per Sec */
#define SIM_THROT_KCYC 2 /* KiloCycles Per Sec */
#define SIM_THROT_PCT 3 /* Max Percent of host CPU */
#define SIM_THROT_SPC 4 /* Specific periodic Delay */
#define TIMER_DBG_IDLE 0x001 /* Debug Flag for Idle Debugging */
#define TIMER_DBG_QUEUE 0x002 /* Debug Flag for Asynch Queue Debugging */