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HeAP: improve error handling when stuck

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-11-26 10:16:27 +00:00
parent defafcf5fe
commit 523ed4cfb2
1 changed files with 11 additions and 0 deletions
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11
common/placer_heap.cc
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@ -774,6 +774,7 @@ class HeAPPlacer
}
int ripup_radius = 2;
int total_iters = 0;
int total_iters_noreset = 0;
while (!remaining.empty()) {
auto top = remaining.top();
remaining.pop();
@ -793,13 +794,23 @@ class HeAPPlacer
int best_inp_len = std::numeric_limits<int>::max();
total_iters++;
total_iters_noreset++;
if (total_iters > int(solve_cells.size())) {
total_iters = 0;
ripup_radius = std::max(std::max(max_x, max_y), ripup_radius * 2);
}
if (total_iters_noreset > std::max(50000, 1000 * int(ctx->cells.size()))) {
log_error("Unable to find legal placement for all cells, design is probably at utilisation limit.\n");
}
while (!placed) {
// Set a conservative timeout
if (iter > std::max(1000, 3 * int(ctx->cells.size())))
log_error("Unable to find legal placement for cell '%s', check constraints and utilisation.\n",
ctx->nameOf(ci));
int rx = radius, ry = radius;
if (ci->region != nullptr) {