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timing: Fixes to criticality calculation

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2018-12-02 13:47:56 +00:00
parent 254c5ea359
commit 0f40e5fe8c
2 changed files with 25 additions and 3 deletions
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16
common/timing.cc
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@ -599,6 +599,22 @@ struct Timing
nc.cd_worst_slack = std::min(nc.cd_worst_slack, worst_slack.at(startdomain.first));
}
}
if (ctx->debug) {
for (auto &nc : *net_crit) {
NetInfo *net = ctx->nets.at(nc.first).get();
log_info("Net %s maxlen %d worst_slack %.02fns: \n", nc.first.c_str(ctx), nc.second.max_path_length,
ctx->getDelayNS(nc.second.cd_worst_slack));
if (!nc.second.criticality.empty() && !nc.second.slack.empty()) {
for (size_t i = 0; i < net->users.size(); i++) {
log_info(" user %s.%s slack %.02fns crit %.03f\n", net->users.at(i).cell->name.c_str(ctx),
net->users.at(i).port.c_str(ctx), ctx->getDelayNS(nc.second.slack.at(i)),
nc.second.criticality.at(i));
}
}
log_break();
}
}
}
return min_slack;
}

8
common/timing_opt.cc
View File

@ -90,7 +90,7 @@ class TimingOptimiser
log_info(" Iteration %d...\n", i);
get_criticalities(ctx, &net_crit);
setup_delay_limits();
auto crit_paths = find_crit_paths(0.98, 1000);
auto crit_paths = find_crit_paths(0.92, 1000);
for (auto &path : crit_paths)
optimise_path(path);
#if 1
@ -372,6 +372,9 @@ class TimingOptimiser
TimingPortClass tpclass = ctx->getPortTimingClass(cell, port.first, ccount);
if (tpclass != TMG_COMB_OUTPUT)
continue;
bool is_path = ctx->getCellDelay(cell, fwd_cursor->port, port.first, combDelay);
if (!is_path)
continue;
auto &crits = net_crit.at(pn->name).criticality;
for (size_t i = 0; i < crits.size(); i++) {
if (used_ports.count(&(pn->users.at(i))))
@ -427,8 +430,11 @@ class TimingOptimiser
}
if (path_cells.size() < 3) {
if (ctx->debug) {
log_info("Too few moveable cells; skipping path\n");
log_break();
}
return;
}
IdString last_cell;