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[core] add a new option 'disable_unused_trees' to route clock rr graph

This commit is contained in:
tangxifan 2024-06-27 12:01:54 -07:00
parent 3fb891094b
commit 7892c2340c
4 changed files with 19 additions and 4 deletions
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12
openfpga/src/annotation/route_clock_rr_graph.cpp
View File

@ -91,13 +91,14 @@ static int route_clock_tree_rr_graph(
const vtr::vector<RRNodeId, ClusterNetId>& rr_node_gnets,
const std::map<ClockTreePinId, ClusterNetId>& tree2clk_pin_map,
const ClockNetwork& clk_ntwk, const ClockTreeId& clk_tree,
const bool& disable_unused_trees,
const bool& verbose) {
for (auto ispine : clk_ntwk.spines(clk_tree)) {
VTR_LOGV(verbose, "Routing spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
for (auto ipin : clk_ntwk.pins(clk_tree)) {
/* Do not route unused clock spines */
if (tree2clk_pin_map.find(ipin) == tree2clk_pin_map.end()) {
if (disable_unused_trees && tree2clk_pin_map.find(ipin) == tree2clk_pin_map.end()) {
VTR_LOGV(verbose, "Skip routing backbone of unused spine '%s'...\n",
clk_ntwk.spine_name(ispine).c_str());
continue;
@ -172,6 +173,8 @@ static int route_clock_tree_rr_graph(
vpr_routing_annotation.set_rr_node_net(des_node,
tree2clk_pin_map.at(ipin));
use_int_driver++;
VTR_LOGV(verbose, "Routing switch points of spine '%s' at the switching point (%lu, %lu) using internal driver\n",
clk_ntwk.spine_name(ispine).c_str(), src_coord.x(), src_coord.y());
}
}
if (use_int_driver > 1) {
@ -266,7 +269,10 @@ int route_clock_rr_graph(
const ClusteredNetlist& cluster_nlist, const PlacementContext& vpr_place_ctx,
const VprNetlistAnnotation& netlist_annotation,
const RRClockSpatialLookup& clk_rr_lookup, const ClockNetwork& clk_ntwk,
const PinConstraints& pin_constraints, const bool& verbose) {
const PinConstraints& pin_constraints,
const bool& disable_unused_trees,
const bool& disable_unused_spines,
const bool& verbose) {
vtr::ScopedStartFinishTimer timer(
"Route programmable clock network based on routing resource graph");
@ -318,7 +324,7 @@ int route_clock_rr_graph(
clk_ntwk.tree_name(itree).c_str());
status = route_clock_tree_rr_graph(
vpr_routing_annotation, vpr_device_ctx.rr_graph, clk_rr_lookup,
rr_node_gnets, tree2clk_pin_map, clk_ntwk, itree, verbose);
rr_node_gnets, tree2clk_pin_map, clk_ntwk, itree, disable_unused_trees, verbose);
if (status == CMD_EXEC_FATAL_ERROR) {
return status;
}

5
openfpga/src/annotation/route_clock_rr_graph.h
View File

@ -24,7 +24,10 @@ int route_clock_rr_graph(
const ClusteredNetlist& cluster_nlist, const PlacementContext& vpr_place_ctx,
const VprNetlistAnnotation& netlist_annotation,
const RRClockSpatialLookup& clk_rr_lookup, const ClockNetwork& clk_ntwk,
const PinConstraints& pin_constraints, const bool& verbose);
const PinConstraints& pin_constraints,
const bool& disable_unused_trees,
const bool& disable_unused_spines,
const bool& verbose);
} /* end namespace openfpga */

4
openfpga/src/base/openfpga_link_arch_template.h
View File

@ -219,6 +219,8 @@ int route_clock_rr_graph_template(T& openfpga_ctx, const Command& cmd,
/* add an option '--pin_constraints_file in short '-pcf' */
CommandOptionId opt_pcf = cmd.option("pin_constraints_file");
CommandOptionId opt_disable_unused_trees = cmd.option("disable_unused_trees");
CommandOptionId opt_disable_unused_spines = cmd.option("disable_unused_spines");
CommandOptionId opt_verbose = cmd.option("verbose");
/* If pin constraints are enabled by command options, read the file */
@ -233,6 +235,8 @@ int route_clock_rr_graph_template(T& openfpga_ctx, const Command& cmd,
g_vpr_ctx.atom(), g_vpr_ctx.clustering().clb_nlist, g_vpr_ctx.placement(),
openfpga_ctx.vpr_netlist_annotation(), openfpga_ctx.clock_rr_lookup(),
openfpga_ctx.clock_arch(), pin_constraints,
cmd_context.option_enable(cmd, opt_disable_unused_trees),
cmd_context.option_enable(cmd, opt_disable_unused_spines),
cmd_context.option_enable(cmd, opt_verbose));
}

2
openfpga/src/base/openfpga_setup_command_template.h
View File

@ -710,6 +710,8 @@ ShellCommandId add_route_clock_rr_graph_command_template(
shell_cmd.set_option_short_name(opt_file, "pcf");
shell_cmd.set_option_require_value(opt_file, openfpga::OPT_STRING);
shell_cmd.add_option("disable_unused_trees", false, "Disable entire clock trees when they are not used by any clock nets. Useful to reduce clock power");
shell_cmd.add_option("disable_unused_spines", false, "Disable part of the clock tree which are used by clock nets. Useful to reduce clock power");
/* Add an option '--verbose' */
shell_cmd.add_option("verbose", false, "Show verbose outputs");