[Test] introduce test_pynq_performance_tfc_w1a1

tests/pynq/test_pynq_performance_tfc_w1a1.py

+import os
+
+import pytest
+import numpy as np
+from scipy.stats import linregress
+import warnings
+from finn.util.test import load_test_checkpoint_or_skip
+from finn.core.throughput_test import throughput_test
+
+build_dir = "/tmp/" + os.environ["FINN_INST_NAME"]
+
+
+@pytest.mark.vivado
+@pytest.mark.slow
+def test_pynq_performance_tfc_w1a1():
+    model = load_test_checkpoint_or_skip(
+        build_dir + "/end2end_tfc_w1a1_pynq_deploy.onnx"
+    )
+    try:
+        ip = os.environ["PYNQ_IP"]  # NOQA
+        board = os.environ["PYNQ_BOARD"]  # NOQA
+        if ip == "" or board == "":
+            pytest.skip("PYNQ board or IP address not specified")
+        ret = dict()
+        bsize_range = [1, 10, 100, 1000, 10000]
+        for bsize in bsize_range:
+            res = throughput_test(model, bsize)
+            assert res is not None
+            ret[bsize] = res
+
+        y = [ret[key]["runtime[ms]"] for key in bsize_range]
+        lrret = linregress(bsize_range, y)
+        ret_str = ""
+        ret_str += "\n" + "TFC-w1a1 Throughput Test Results"
+        ret_str += "\n" + "-----------------------------"
+        ret_str += "\n" + "From linear regression:"
+        ret_str += "\n" + "Invocation overhead: %f ms" % lrret.intercept
+        ret_str += "\n" + "Time per sample: %f ms" % lrret.slope
+        ret_str += "\n" + "Raw data:"
+
+        ret_str += "\n" + "{:<8} {:<16} {:<16} {:<16} {:<16} {:<16}".format(
+            "N", "runtime[ms]", "fclk[mhz]", "fps", "DRAM rd[Mb/s]", "DRAM wr[Mb/s]"
+        )
+        for k in bsize_range:
+            v = ret[k]
+            ret_str += "\n" + "{:<8} {:<16} {:<16} {:<16} {:<16} {:<16}".format(
+                k,
+                np.round(v["runtime[ms]"], 4),
+                v["fclk[mhz]"],
+                np.round(v["throughput[images/s]"], 2),
+                np.round(v["DRAM_in_bandwidth[Mb/s]"], 2),
+                np.round(v["DRAM_out_bandwidth[Mb/s]"], 2),
+            )
+        ret_str += "\n" + "-----------------------------"
+        warnings.warn(ret_str)
+
+    except KeyError:
+        pytest.skip("PYNQ board or IP address not specified")