util: bazel plot_congestion

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/BUILD.bazel

@@ -1,5 +1,4 @@
 load("@bazel-orfs//:openroad.bzl", "orfs_flow")
-load("@rules_python//python:pip.bzl", "compile_pip_requirements")
 
 filegroup(
     name = "constraints-gcd",
@@ -250,9 +249,3 @@ filegroup(
     srcs = glob(include = ["designs/src/ethmac_lvt/*.v"]),
     visibility = [":__subpackages__"],
 )
-
-compile_pip_requirements(
-    name = "requirements",
-    src = "util/requirements.in",
-    requirements_txt = "util/requirements_lock.txt",
-)

flow/util/BUILD.bazel

@@ -0,0 +1,18 @@
+load("@orfs-pip//:requirements.bzl", "requirement")
+load("@rules_python//python:pip.bzl", "compile_pip_requirements")
+
+exports_files(["open_plots.sh"])
+
+py_binary(
+    name = "plot_congestion",
+    srcs = ["plot_congestion.py"],
+    main = "plot_congestion.py",
+    visibility = ["//visibility:public"],
+    deps = [requirement("matplotlib")],
+)
+
+compile_pip_requirements(
+    name = "requirements",
+    src = "requirements.in",
+    requirements_txt = "requirements_lock.txt",
+)

flow/util/open_plots.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+xdg-open $1

flow/util/plot_congestion.bzl

@@ -0,0 +1,23 @@
+"""Plots congestion against some parameter such as PLACE_DENSITY"""
+
+def plot_congestion(name, srcs, argument, values):
+    native.filegroup(
+        name = "{name}_congestion".format(name = name),
+        srcs = srcs,
+        output_group = "congestion.rpt",
+    )
+
+    native.genrule(
+        name = "{}_pdf".format(name),
+        srcs = ["{name}_congestion".format(name = name)],
+        outs = ["{}.pdf".format(name)],
+        cmd = "$(execpath //util:plot_congestion) {argument} $@ $(locations :{name}_congestion) {values}".format(values = " ".join(values), argument = argument, name = name),
+        tools = ["//util:plot_congestion"],
+    )
+
+    native.sh_binary(
+        name = name,
+        srcs = ["//util:open_plots.sh"],
+        args = ["$(location :{}.pdf)".format(name)],
+        data = ["{}.pdf".format(name)],
+    )

flow/util/plot_congestion.py

@@ -0,0 +1,31 @@
+import matplotlib.pyplot as plt
+import numpy as np
+import sys
+import re
+import os
+
+
+sweep = sys.argv[1]
+output = sys.argv[2]
+remainder = sys.argv[3:]
+files = remainder[: len(remainder) // 2]
+values = remainder[len(remainder) // 2 :]
+
+# count lines in each file and divide by 3 and create a list of those
+# numbers
+congestion = []
+for file in files:
+    with open(file, "r") as f:
+        lines = f.readlines()
+        congestion.append(len(lines) // 4)
+
+# xy plot of density vs DRC errors
+x = list(map(float, values))
+y = congestion
+plt.plot(x, y, "o-")
+plt.xlabel(sweep)
+plt.ylabel("DRC Errors")
+plt.title(sweep + " vs DRC Errors")
+plt.grid()
+plt.yscale("log")
+plt.savefig(output)