liangfu commented on a change in pull request #4421: [VTA] Bringing group 
convolution support 
URL: https://github.com/apache/incubator-tvm/pull/4421#discussion_r351098420
 
 

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 File path: vta/tests/python/integration/test_benchmark_topi_group_conv2d.py
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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Testing topi group conv2d operator for VTA"""
+
+import json
+import os
+
+import numpy as np
+from collections import namedtuple
+
+import tvm
+from tvm import autotvm
+from tvm.contrib import util
+from tvm.contrib.pickle_memoize import memoize
+import topi
+import topi.testing
+import vta
+from vta import program_fpga, reconfig_runtime
+import vta.testing
+from vta.testing import simulator
+
+
+Workload = namedtuple("GroupConv2DWorkload",
+                      ['batch', 'height', 'width', 'in_filter', 'out_filter', 
'groups',
+                       'hkernel', 'wkernel', 'hpad', 'wpad', 'hstride', 
'wstride'])
+
+# Get batch info from env
+env = vta.get_env()
+
+# Mobilenet (grouped variant) workloads
+mobilenet_wkls = [
+    ('mobilenet.D1', Workload(env.BATCH, 112, 112,   32,   32,  2, 3, 3, 1, 1, 
1, 1)),
+    ('mobilenet.D2', Workload(env.BATCH, 112, 112,   64,   64,  4, 3, 3, 1, 1, 
2, 2)),
+    ('mobilenet.D3', Workload(env.BATCH,  56,  56,  128,  128,  8, 3, 3, 1, 1, 
1, 1)),
+    ('mobilenet.D4', Workload(env.BATCH,  56,  56,  128,  128,  8, 3, 3, 1, 1, 
2, 2)),
+    ('mobilenet.D5', Workload(env.BATCH,  28,  28,  256,  256, 16, 3, 3, 1, 1, 
1, 1)),
+    ('mobilenet.D6', Workload(env.BATCH,  28,  28,  256,  256, 16, 3, 3, 1, 1, 
2, 2)),
+    ('mobilenet.D7', Workload(env.BATCH,  14,  14,  512,  512, 32, 3, 3, 1, 1, 
1, 1)),
+    ('mobilenet.D8', Workload(env.BATCH,  14,  14,  512,  512, 32, 3, 3, 1, 1, 
2, 2)),
+    ('mobilenet.D9', Workload(env.BATCH,   7,  7,  1024, 1024, 64, 3, 3, 1, 1, 
1, 1)),
+]
+
+# FIXME: we need a custom clip operator to circumvent a pattern detection 
limitation
[email protected]_scope(tag=topi.tag.ELEMWISE)
+def my_clip(x, a_min, a_max):
+    """Unlike topi's current clip, put min and max into two stages."""
+    const_min = tvm.const(a_min, x.dtype)
+    const_max = tvm.const(a_max, x.dtype)
+    x = tvm.compute(x.shape, lambda *i: tvm.min(x(*i), const_max), 
name="clipA")
+    x = tvm.compute(x.shape, lambda *i: tvm.max(x(*i), const_min), 
name="clipB")
+    return x
+
+def run_group_conv2d(env, remote, wl, target,
+                     check_correctness=True, print_ir=False,
+                     samples=4):
+
+    # Workload assertions
+    assert wl.hpad == wl.wpad
+
+    # Perform packing only if we are targeting the accelerator
+    if "arm_cpu" in target.keys:
+        data_pack = False
+        layout = "NCHW"
+    elif "vta" in target.keys:
+        data_pack = True
+        layout = "NCHW%dn%dc" % (env.BATCH, env.BLOCK_IN)
+
+    # Derive shapes depending upon packing
+    CI_G = wl.in_filter // wl.groups
+    a_shape = (wl.batch, wl.in_filter, wl.height, wl.width)
+    w_shape = (wl.out_filter, CI_G, wl.hkernel, wl.wkernel)
+    b_shape = (wl.batch, wl.out_filter, 1, 1)
+    if data_pack:
+        data_shape = (wl.batch//env.BATCH, wl.in_filter//env.BLOCK_IN,
+                      wl.height, wl.width, env.BATCH, env.BLOCK_IN)
+        kernel_shape = (wl.out_filter//env.BLOCK_OUT, CI_G//env.BLOCK_IN,
+                        wl.hkernel, wl.wkernel, env.BLOCK_OUT, env.BLOCK_IN)
+        bias_shape = (wl.batch//env.BATCH, wl.out_filter//env.BLOCK_OUT,
+                      1, 1, env.BATCH, env.BLOCK_OUT)
+    else:
+        data_shape = a_shape
+        kernel_shape = w_shape
+        bias_shape = b_shape
+    data = tvm.placeholder(data_shape, name="data", dtype=env.inp_dtype)
+    kernel = tvm.placeholder(kernel_shape, name="kernel", dtype=env.wgt_dtype)
+    bias = tvm.placeholder(bias_shape, name="bias", dtype=env.acc_dtype)
+    # Define base computation schedule
+    with target:
+        res = topi.nn.group_conv2d_nchw(
+            data, kernel, (wl.hstride, wl.wstride), (wl.hpad, wl.wpad), (1, 1),
+            wl.groups, env.acc_dtype)
+        res = topi.right_shift(res, 8)
+        res = topi.add(res, bias)
+        res = my_clip(res, 0, (1 << env.OUT_WIDTH - 1) - 1)
+        res = topi.cast(res, env.out_dtype)
+        # Derive base schedule
+        s = topi.generic.schedule_group_conv2d_nchw([res])
+        if print_ir:
+            print(vta.lower(s, [data, kernel, bias, res], simple_mode=True))
+
+    # Derive number of ops
+    fout_height = (wl.height + 2 * wl.hpad - wl.hkernel) // wl.hstride + 1
+    fout_width = (wl.width + 2 * wl.wpad - wl.wkernel) // wl.wstride + 1
+    num_ops = 2 * wl.batch * fout_height * fout_width * wl.hkernel * 
wl.wkernel * \
+        wl.out_filter * wl.in_filter // wl.groups
+
+    # @memoize("vta.tests.test_benchmark_topi.conv2d.verify_nhwc")
+    def get_ref_data():
+        # derive min max for act, wgt, and bias types (max non inclusive)
+        a_min, a_max = 0 - (1 << (env.INP_WIDTH - 1)), (1 << (env.INP_WIDTH - 
1))
+        w_min, w_max = 0 - (1 << (env.WGT_WIDTH - 1)), (1 << (env.WGT_WIDTH - 
1))
+        b_min, b_max = 0 - 1 << (env.INP_WIDTH + env.WGT_WIDTH - 2), 1 << 
(env.INP_WIDTH + env.WGT_WIDTH - 2)
+        a_np = np.random.randint(a_min, a_max, size=a_shape).astype(data.dtype)
+        w_np = np.random.randint(w_min, w_max, 
size=w_shape).astype(kernel.dtype)
+        b_np = np.random.randint(b_min, b_max, 
size=b_shape).astype(env.acc_dtype)
+        r_np = topi.testing.conv2d_nchw_python(
+            a_np.astype(env.acc_dtype), w_np.astype(env.acc_dtype), 
+            (wl.hstride, wl.wstride), wl.hpad, wl.groups).astype(env.acc_dtype)
+        return a_np, w_np, b_np, r_np
+
+    # Data in original format
+    data_np, kernel_np, bias_np, res_ref = get_ref_data()
+    if data_pack:
+        data_np = data_np.reshape(
+            wl.batch//env.BATCH, env.BATCH,
+            wl.in_filter//env.BLOCK_IN, env.BLOCK_IN,
+            wl.height, wl.width).transpose((0, 2, 4, 5, 1, 3))
+        kernel_np = kernel_np.reshape(
+            wl.out_filter//env.BLOCK_OUT, env.BLOCK_OUT,
+            CI_G//env.BLOCK_IN, env.BLOCK_IN,
+            wl.hkernel, wl.wkernel).transpose((0, 2, 4, 5, 1, 3))
+        bias_np = bias_np.reshape(
+            wl.batch//env.BATCH, wl.out_filter//env.BLOCK_OUT,
+            1, 1, env.BATCH, env.BLOCK_OUT)
+
+    # Build
+    if "vta" in target.keys:
+        mod = vta.build(s, [data, kernel, bias, res],
+                        target=target,
+                        target_host=env.target_host,
+                        name="conv2d")
+    else:
+        mod = tvm.build(s, [data, kernel, bias, res],
+                        target=target,
+                        target_host=env.target_host,
+                        name="conv2d")
+    temp = util.tempdir()
+    mod.save(temp.relpath("conv2d.o"))
+    remote.upload(temp.relpath("conv2d.o"))
+    f = remote.load_module("conv2d.o")
+    ctx = remote.context(str(target))
+
+    res_np = np.zeros(topi.util.get_const_tuple(res.shape)).astype(res.dtype)
+    data_arr = tvm.nd.array(data_np, ctx)
+    kernel_arr = tvm.nd.array(kernel_np, ctx)
+    bias_arr = tvm.nd.array(bias_np, ctx)
+    res_arr = tvm.nd.array(res_np, ctx)
+    time_f = f.time_evaluator("conv2d", ctx, number=samples)
+
+    # In vta sim mode, collect simulator runtime statistics
+    stats = {}
+    cost = None
+    if env.TARGET in ["sim", "tsim"]:
+        # Check if we're in local RPC mode (allows us to rebuild the
+        # runtime on the fly when varying the VTA designs)
+        local_rpc = int(os.environ.get("VTA_LOCAL_SIM_RPC", "0"))
+        if local_rpc:
+            if env.TARGET == "sim":
+                remote.get_function("vta.simulator.profiler_clear")()
+            else:
+                remote.get_function("vta.tsim.profiler_clear")()
+            cost = time_f(data_arr, kernel_arr, bias_arr, res_arr)
+            if env.TARGET == "sim":
+                stats = 
json.loads(remote.get_function("vta.simulator.profiler_status")())
+            else:
+                stats = 
json.loads(remote.get_function("vta.tsim.profiler_status")())
+        else:
+            simulator.clear_stats()
+            cost = time_f(data_arr, kernel_arr, bias_arr, res_arr)
+            stats = simulator.stats()
+    else:
+        cost = time_f(data_arr, kernel_arr, bias_arr, res_arr)
+
+    # Check correctness
+    correct = False
+    if check_correctness:
+        res_orig = res_arr.asnumpy()
+        if data_pack:
+            res_orig = res_orig.transpose(
+                (0, 4, 1, 5, 2, 3)).reshape(wl.batch, wl.out_filter, 
fout_height, fout_width)
+            bias_np = bias_np.transpose(
+                (0, 4, 1, 5, 2, 3)).reshape(wl.batch, wl.out_filter, 1, 1)
+        res_ref = res_ref >> env.WGT_WIDTH
+        res_ref += bias_np
+        res_ref = np.clip(res_ref, 0, (1 << env.OUT_WIDTH - 1) - 1)
+        res_ref = res_ref.astype(env.out_dtype)
+        correct = np.allclose(res_orig, res_ref)
+
+    gops = (num_ops / cost.mean) / float(10 ** 9)
+    status = "PASSED" if correct else "FAILED"
+    if "arm_cpu" in target.keys:
+        device = "CPU"
+    elif "vta" in target.keys:
+        device = "VTA"
+    print("%s GROUP CONV2D TEST %s: Time cost = %g sec/op, %g GOPS" % (device, 
status, cost.mean, gops))
+
+    return correct, cost, stats
+
+def test_conv2d(device="vta"):
+    def _run(env, remote):
+        if device == "vta":
+            target = env.target
+            if env.TARGET not in ["sim", "tsim"]:
+                assert tvm.module.enabled("rpc")
+                program_fpga(remote, bitstream=None)
+                reconfig_runtime(remote)
+        elif device == "arm_cpu":
+            target = env.target_vta_cpu
+        with autotvm.tophub.context(target): # load pre-tuned schedule 
parameters
+            for _, wl in mobilenet_wkls:
+                print(wl)
+                run_group_conv2d(env, remote, wl, target)
+    vta.testing.run(_run)
+
+if __name__ == "__main__":
+    # test_conv2d(device="arm_cpu")
 
 Review comment:
   This is another line left to be removed, or it should be enabled for testing?

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