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dynamic screen refresh interval

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folkert van heusden 2022-03-21 21:31:36 +01:00
parent 0ad0085014
commit 1a09bd071b
1 changed files with 27 additions and 5 deletions
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32
main.cpp
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@ -326,8 +326,13 @@ int main(int argc, char *argv[])
struct pollfd fds[] = { { STDIN_FILENO, POLLIN, 0 } };
const unsigned long start = get_ms();
uint64_t icount = 0;
uint32_t icount = 0;
uint64_t total_icount = 0;
uint32_t refresh_interval = 262144;
constexpr uint32_t pdp_11_70_mips = 1000000000 / 300; // 300ns cache
const unsigned long start = get_ms();
unsigned long interval_start = start;
for(;;) {
c->step();
@ -355,16 +360,33 @@ int main(int argc, char *argv[])
icount++;
if ((icount & 262143) == 0) {
if (icount >= refresh_interval) {
total_icount += icount;
unsigned long now = get_ms();
unsigned long took_ms = std::max(1ul, now - interval_start);
refresh_interval = (1000 * icount) / took_ms;
if (refresh_interval == 0)
refresh_interval = 65536;
else if (refresh_interval > pdp_11_70_mips)
refresh_interval = pdp_11_70_mips;
fprintf(stderr, "instructions_executed: %u, took_ms: %lu, new refresh_interval: %u\n", icount, took_ms, refresh_interval);
if (withUI) {
unsigned long now = get_ms();
mvwprintw(w_main_b -> win, 0, 24, "%.1f/s ", icount * 1000.0 / (now - start));
mvwprintw(w_main_b -> win, 0, 24, "%.1f/s ", icount * 1000.0 / took_ms);
mvwprintw(w_main_b -> win, 0, 42, "%06o", b->get_switch_register());
mydoupdate();
}
if (terminate)
event = 1;
interval_start = now;
icount = 0;
}
}