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router2: Profile nets by route time

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-01-14 13:35:18 +00:00
parent 72367e6cfd
commit 7ac43e5f00
1 changed files with 24 additions and 0 deletions
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24
common/router2.cc
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@ -39,6 +39,8 @@
NEXTPNR_NAMESPACE_BEGIN
#define RUNTIME_PROFILE
namespace {
struct Router2
{
@ -59,6 +61,7 @@ struct Router2
ArcBounds bb;
// Coordinates of the center of the net, used for the weight-to-average
int cx, cy, hpwl;
int total_route_us = 0;
};
struct PerWireData
@ -627,6 +630,10 @@ struct Router2
ROUTE_LOG_DBG("Routing net '%s'...\n", ctx->nameOf(net));
#ifdef RUNTIME_PROFILE
auto rstart = std::chrono::high_resolution_clock::now();
#endif
// Nothing to do if net is undriven
if (net->driver.cell == nullptr)
return true;
@ -669,6 +676,11 @@ struct Router2
}
}
}
#ifdef RUNTIME_PROFILE
auto rend = std::chrono::high_resolution_clock::now();
nets.at(net->udata).total_route_us +=
(std::chrono::duration_cast<std::chrono::microseconds>(rend - rstart).count());
#endif
return !have_failures;
}
#undef ROUTE_LOG_DBG
@ -977,6 +989,18 @@ struct Router2
++iter;
curr_cong_weight *= 2;
} while (!failed_nets.empty());
#ifdef RUNTIME_PROFILE
std::vector<std::pair<int, IdString>> nets_by_runtime;
for (auto &n : nets_by_udata) {
nets_by_runtime.emplace_back(nets.at(n->udata).total_route_us, n->name);
}
std::sort(nets_by_runtime.begin(), nets_by_runtime.end(), std::greater<std::pair<int, IdString>>());
log_info("1000 slowest nets by runtime:\n");
for (int i = 0; i < std::min(int(nets_by_runtime.size()), 1000); i++) {
log(" %80s %6d %.1fms\n", nets_by_runtime.at(i).second.c_str(ctx),
int(ctx->nets.at(nets_by_runtime.at(i).second)->users.size()), nets_by_runtime.at(i).first / 1000.0);
}
#endif
}
};
} // namespace