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PDP10: Fix 2% wallclock issue for 50 Hz systems (R. Voorhorst)

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Mark Pizzolato
2016-11-20 14:08:58 -08:00
parent 8448580a3a
commit d28834fbbf
1 changed files with 2 additions and 1 deletions
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3
PDP10/pdp10_tim.c
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@@ -25,6 +25,7 @@
tim timer subsystem tim timer subsystem
10-Nov-16 *** Fix wallclock issue for 50 Hz systems (R. Voorhorst)
18-Apr-12 RMS Removed absolute scheduling on reset 18-Apr-12 RMS Removed absolute scheduling on reset
18-Jun-07 RMS Added UNIT_IDLE flag 18-Jun-07 RMS Added UNIT_IDLE flag
03-Nov-06 RMS Rewritten to support idling 03-Nov-06 RMS Rewritten to support idling
@@ -291,7 +292,7 @@ tim_new_period = new_interval & ~TIM_HWRE_MASK;
if (new_interval & TIM_HWRE_MASK) tim_new_period += 010000; if (new_interval & TIM_HWRE_MASK) tim_new_period += 010000;
/* clk_tps is the new number of clocks ticks per second */ /* clk_tps is the new number of clocks ticks per second */
clk_tps = (int32) ceil((double)TIM_HW_FREQ /(double)tim_new_period); clk_tps = (int32) round((double)TIM_HW_FREQ /(double)tim_new_period);
/* tmxr is polled every tim_mult clks. Compute the divisor matching the target. */ /* tmxr is polled every tim_mult clks. Compute the divisor matching the target. */
tim_mult = (clk_tps <= TIM_TMXR_FREQ) ? 1 : (clk_tps / TIM_TMXR_FREQ) ; tim_mult = (clk_tps <= TIM_TMXR_FREQ) ? 1 : (clk_tps / TIM_TMXR_FREQ) ;