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router2: additional heatmap data

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Lofty 2024-05-22 22:56:51 +01:00 committed by myrtle
parent b3b2392893
commit 268b32c341
3 changed files with 135 additions and 7 deletions
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59
common/route/router2.cc
View File

@ -1159,7 +1159,7 @@ struct Router2
return success;
}
void write_wiretype_heatmap(std::ostream &out)
void write_congestion_by_wiretype_heatmap(std::ostream &out)
{
dict<IdString, std::vector<int>> cong_by_type;
size_t max_cong = 0;
@ -1185,6 +1185,33 @@ struct Router2
}
}
void write_utilisation_by_wiretype_heatmap(std::ostream &out)
{
dict<IdString, int> util_by_type;
for (auto &wd : flat_wires) {
IdString type = ctx->getWireType(wd.w);
if (wd.curr_cong > 0)
util_by_type[type] += wd.curr_cong;
}
// Write csv
for (auto &u : util_by_type)
out << u.first.c_str(ctx) << "," << u.second << std::endl;
}
void write_congestion_by_coordinate_heatmap(std::ostream &out)
{
auto util_by_coord = std::vector<std::vector<int>>(ctx->getGridDimX() + 1, std::vector<int>(ctx->getGridDimY() + 1, 0));
for (auto &wd : flat_wires)
if (wd.curr_cong > 1)
util_by_coord[wd.x][wd.y] += wd.curr_cong;
// Write csv
for (auto &x : util_by_coord) {
for (auto y : x)
out << y << ",";
out << std::endl;
}
}
int mid_x = 0, mid_y = 0;
void partition_nets()
@ -1444,12 +1471,30 @@ struct Router2
update_congestion();
if (!cfg.heatmap.empty()) {
std::string filename(cfg.heatmap + "_" + std::to_string(iter) + ".csv");
std::ofstream cong_map(filename);
if (!cong_map)
log_error("Failed to open wiretype heatmap %s for writing.\n", filename.c_str());
write_wiretype_heatmap(cong_map);
log_info(" wrote wiretype heatmap to %s.\n", filename.c_str());
{
std::string filename(cfg.heatmap + "_congestion_by_wiretype_" + std::to_string(iter) + ".csv");
std::ofstream cong_map(filename);
if (!cong_map)
log_error("Failed to open congestion-by-wiretype heatmap %s for writing.\n", filename.c_str());
write_congestion_by_wiretype_heatmap(cong_map);
log_info(" wrote congestion-by-wiretype heatmap to %s.\n", filename.c_str());
}
{
std::string filename(cfg.heatmap + "_utilisation_by_wiretype_" + std::to_string(iter) + ".csv");
std::ofstream cong_map(filename);
if (!cong_map)
log_error("Failed to open utilisation-by-wiretype heatmap %s for writing.\n", filename.c_str());
write_utilisation_by_wiretype_heatmap(cong_map);
log_info(" wrote utilisation-by-wiretype heatmap to %s.\n", filename.c_str());
}
{
std::string filename(cfg.heatmap + "_congestion_by_coordinate_" + std::to_string(iter) + ".csv");
std::ofstream cong_map(filename);
if (!cong_map)
log_error("Failed to open congestion-by-coordinate heatmap %s for writing.\n", filename.c_str());
write_congestion_by_coordinate_heatmap(cong_map);
log_info(" wrote congestion-by-coordinate heatmap to %s.\n", filename.c_str());
}
}
int tmgfail = 0;
if (timing_driven)

27
python/plot_congestion_by_coordinate.py Normal file
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@ -0,0 +1,27 @@
import csv
import sys
import matplotlib.pyplot as plt
data = []
file = 1
try:
while True:
print("{}/heatmap_congestion_by_coordinate_{}.csv".format(sys.argv[1], file))
with open("{}/heatmap_congestion_by_coordinate_{}.csv".format(sys.argv[1], file)) as f:
file_data = []
reader = csv.reader(f, delimiter=',')
for row in reader:
file_data.append([float(x) for x in row if x != ''])
data.append(file_data)
file += 1
except FileNotFoundError:
pass
for i, file_data in enumerate(data):
plt.imshow(file_data, cmap="gray", aspect="equal")
plt.title("heatmap for iteration {}".format(i+1))
plt.tight_layout()
plt.savefig("{}/heatmap_congestion_by_coordinate_{:03}.png".format(sys.argv[1], i), dpi=300)
plt.clf()

56
python/plot_congestion_by_wiretype.py Normal file
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@ -0,0 +1,56 @@
import csv
import sys
import matplotlib.pyplot as plt
data = {}
max_bars = {}
file = 1
try:
while True:
print("{}/heatmap_congestion_by_wiretype_{}.csv".format(sys.argv[1], file))
with open("{}/heatmap_congestion_by_wiretype_{}.csv".format(sys.argv[1], file)) as f:
reader = csv.reader(f, delimiter=',')
for row in [x for x in reader][1:]:
key = row[0]
values = [float(x) for x in row[1:] if x != '']
# Ignore wires without overuse
values[0] = 0
values[1] = 0
if key not in data:
data[key] = []
max_bars[key] = 0
data[key].append(values)
max_bars[key] = max(max_bars[key], len(values))
file += 1
except FileNotFoundError:
pass
finally:
file -= 1
to_remove = []
for key in data.keys():
if sum([sum(values) for values in data[key]]) == 0:
# Prune entries that never have any overuse to attempt to reduce visual clutter
to_remove.append(key)
else:
# Pad entries as needed
for values in data[key]:
while len(values) < max_bars[key]:
values.append(0)
for key in to_remove:
del data[key]
COLS = 2
for i in range(file):
plt.suptitle("heatmap for iteration {}".format(i))
fig, axs = plt.subplots((len(data.keys())+(COLS-1))//COLS, COLS)
for j, key in enumerate(data.keys()):
if sum(data[key][i]) > 0:
axs[j//COLS, j%COLS].bar([x for x in range(len(data[key][i]))], data[key][i])
axs[j//COLS, j%COLS].set_title(key)
else:
axs[j//COLS, j%COLS].set_axis_off()
plt.savefig("{}/heatmap_congestion_by_wiretype_{:03}.png".format(sys.argv[1], i), dpi=300)
plt.close()