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router2: Add some boundness statistics

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Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2021-05-12 12:16:56 +01:00
parent ea45971dcc
commit ee60e9c71c
1 changed files with 33 additions and 0 deletions
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33
common/router2.cc
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@ -1244,6 +1244,37 @@ struct Router2
route_net(tcs.at(N), fail, false); route_net(tcs.at(N), fail, false);
} }
//#define ROUTER2_STATISTICS
void dump_statistics()
{
#ifdef ROUTER2_STATISTICS
int total_wires = int(flat_wires.size());
int have_hist_cong = 0;
int have_any_bound = 0, have_1_bound = 0, have_2_bound = 0, have_gte3_bound = 0;
for (auto &wire : flat_wires) {
int bound = wire.bound_nets.size();
if (bound != 0)
++have_any_bound;
if (bound == 1)
++have_1_bound;
else if (bound == 2)
++have_2_bound;
else if (bound >= 3)
++have_gte3_bound;
if (wire.hist_cong_cost > 1.0)
++have_hist_cong;
}
log_info("Out of %d wires:\n", total_wires);
log_info(" %d (%.02f%%) have any bound nets\n", have_any_bound, (100.0 * have_any_bound) / total_wires);
log_info(" %d (%.02f%%) have 1 bound net\n", have_1_bound, (100.0 * have_1_bound) / total_wires);
log_info(" %d (%.02f%%) have 2 bound nets\n", have_2_bound, (100.0 * have_2_bound) / total_wires);
log_info(" %d (%.02f%%) have >2 bound nets\n", have_gte3_bound, (100.0 * have_gte3_bound) / total_wires);
log_info(" %d (%.02f%%) have historical congestion\n", have_hist_cong,
(100.0 * have_hist_cong) / total_wires);
#endif
}
void operator()() void operator()()
{ {
log_info("Running router2...\n"); log_info("Running router2...\n");
@ -1301,6 +1332,8 @@ struct Router2
write_heatmap(cong_map, true); write_heatmap(cong_map, true);
} }
#endif #endif
dump_statistics();
if (overused_wires == 0) { if (overused_wires == 0) {
// Try and actually bind nextpnr Arch API wires // Try and actually bind nextpnr Arch API wires
bind_and_check_all(); bind_and_check_all();