caiyu/nextpnr
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Set divisor instead of absolute value

Browse Source
This commit is contained in:
Arjen Roodselaar 2022-12-20 13:10:37 -08:00
parent 923458a2c9
commit be1f700b0b
2 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
common/kernel/command.cc
View File

@ -190,7 +190,7 @@ po::options_description CommandHandler::getGeneralOptions()
"placer heap criticality exponent (int, default: 2)");
general.add_options()("placer-heap-timingweight", po::value<int>(), "placer heap timing weight (int, default: 10)");
general.add_options()("placer-heap-cell-placement-timeout", po::value<int>(),
"allow placer to attempt up to the given number of iterations to place the cell (int, default: design size^2 / 8, 0 for no timeout)");
"allow placer to attempt up to max(10000, total cells^2 / N) iterations to place a cell (int N, default: 8, 0 for no timeout)");
#if !defined(__wasm)
general.add_options()("parallel-refine", "use new experimental parallelised engine for placement refinement");

9
common/place/placer_heap.cc
View File

@ -1817,10 +1817,15 @@ PlacerHeapCfg::PlacerHeapCfg(Context *ctx)
timing_driven = ctx->setting<bool>("timing_driven");
solverTolerance = 1e-5;
placeAllAtOnce = false;
cell_placement_timeout = ctx->setting<int>("placerHeap/cellPlacementTimeout",
int timeout_divisor = ctx->setting<int>("placerHeap/cellPlacementTimeout", 8);
if (timeout_divisor > 0) {
// Set a conservative default. This is a rather large number and could probably
// be shaved down, but for now it will keep the process from running indefinite.
std::max(10000, (int(ctx->cells.size()) * int(ctx->cells.size()) / 8) + 1));
cell_placement_timeout = std::max(10000, (int(ctx->cells.size()) * int(ctx->cells.size()) / timeout_divisor));
} else {
cell_placement_timeout = 0;
}
hpwl_scale_x = 1;
hpwl_scale_y = 1;