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new 9f8fe3c503 [topi] Add `arm_cpu` specific pooling schedules (#14855)
9f8fe3c503 is described below
commit 9f8fe3c503b1aea30c785055bbc35c83c69c1359
Author: Jack Frankland <[email protected]>
AuthorDate: Mon Jul 10 21:12:13 2023 +0100
[topi] Add `arm_cpu` specific pooling schedules (#14855)
This commit:
* Adds specialized `arm_cpu` pooling schedules for both fixed width and
salable vectors.
* Enables topi testing of new `arm_cpu` schedules.
---
python/tvm/relay/op/strategy/arm_cpu.py | 17 ++---
python/tvm/topi/arm_cpu/mprofile/dsp/__init__.py | 2 +
python/tvm/topi/arm_cpu/mprofile/dsp/pool.py | 30 +++++---
python/tvm/topi/arm_cpu/pooling.py | 91 +++++++++++++++++++++++-
tests/python/topi/python/test_topi_pooling.py | 1 +
5 files changed, 116 insertions(+), 25 deletions(-)
diff --git a/python/tvm/relay/op/strategy/arm_cpu.py
b/python/tvm/relay/op/strategy/arm_cpu.py
index dc3b16aa82..3a9f7e1c11 100644
--- a/python/tvm/relay/op/strategy/arm_cpu.py
+++ b/python/tvm/relay/op/strategy/arm_cpu.py
@@ -26,6 +26,7 @@ from tvm import relay, topi, tir
from ....auto_scheduler import is_auto_scheduler_enabled
from ....meta_schedule import is_meta_schedule_enabled
from ....topi.generic import conv2d as conv2d_generic
+from ....topi.arm_cpu.mprofile import dsp
from .. import op as _op
from .generic import *
@@ -63,19 +64,11 @@ def concatenate_strategy_arm_cpu(attrs, inputs, out_type,
target):
def schedule_pool_arm_cpu(attrs, outs, target):
"""schedule pooling ops arm cpu"""
layout = attrs.layout
- avg_pool = isinstance(attrs, relay.op.op_attrs.AvgPool2DAttrs)
with target:
- if (
- avg_pool
- and target.features.has_dsp
- and layout in ("NCW", "NCHW")
- or not avg_pool
- and target.features.has_dsp
- and layout in ("NWC", "NHWC")
- ):
- return topi.arm_cpu.schedule_pool(outs, layout)
- logger.warning("pool is not optimized for arm cpu.")
- return topi.generic.schedule_pool(outs, layout)
+ if target.features.has_dsp:
+ is_avg_pool = isinstance(attrs, relay.op.op_attrs.AvgPool2DAttrs)
+ return dsp.pool.schedule_pool(outs, layout, is_avg_pool)
+ return topi.arm_cpu.schedule_pool(outs, layout)
def _get_padding_width(padding):
diff --git a/python/tvm/topi/arm_cpu/mprofile/dsp/__init__.py
b/python/tvm/topi/arm_cpu/mprofile/dsp/__init__.py
index 13a83393a9..35e3f35a10 100644
--- a/python/tvm/topi/arm_cpu/mprofile/dsp/__init__.py
+++ b/python/tvm/topi/arm_cpu/mprofile/dsp/__init__.py
@@ -14,3 +14,5 @@
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
+"""Schedule for arm_cpu targets supporting DSP"""
+from .pool import schedule_pool
diff --git a/python/tvm/topi/arm_cpu/mprofile/dsp/pool.py
b/python/tvm/topi/arm_cpu/mprofile/dsp/pool.py
index 4416831124..7bd24dfee7 100644
--- a/python/tvm/topi/arm_cpu/mprofile/dsp/pool.py
+++ b/python/tvm/topi/arm_cpu/mprofile/dsp/pool.py
@@ -20,18 +20,12 @@ import logging
import tvm
-from tvm import te
+from tvm import te, topi
from tvm.topi.utils import traverse_inline
-from .micro_kernel.max_pool import (
- intrin_max,
- max_impl,
-)
+from .micro_kernel.max_pool import intrin_max, max_impl
-from .micro_kernel.avg_pool import (
- intrin_sum,
- sum_impl,
-)
+from .micro_kernel.avg_pool import intrin_sum, sum_impl
logger = logging.getLogger("topi")
@@ -100,8 +94,24 @@ def schedule_avgpool_2d_nchw(s, op):
s[output].pragma(n, "import_c", sum_impl(pool_w, uniq_id))
-def pool_dsp_schedule(outs, layout):
+def schedule_pool(outs, layout, is_avg_pool):
"""Schedule function for v7e-m DSP instructions of pooling."""
+
+ if is_avg_pool and layout not in ["NCW", "NCHW"]:
+ logger.warning(
+ "avg pool not support for NCW or NCHW layouts on DSP"
+ "enabled targets, falling back on generic pool"
+ "implementation"
+ )
+ return topi.generic.schedule_pool(outs, layout)
+ elif not is_avg_pool and layout not in ["NWC", "NHWC"]:
+ logger.warning(
+ "max pool not support for NWC or NHWC layouts on DSP"
+ "enabled targets, falling back on generic pool"
+ "implementation"
+ )
+ return topi.generic.schedule_pool(outs, layout)
+
s = te.create_schedule([x.op for x in outs])
def _callback(op):
diff --git a/python/tvm/topi/arm_cpu/pooling.py
b/python/tvm/topi/arm_cpu/pooling.py
index f09f008934..248383c08c 100644
--- a/python/tvm/topi/arm_cpu/pooling.py
+++ b/python/tvm/topi/arm_cpu/pooling.py
@@ -17,9 +17,94 @@
# pylint: disable=invalid-name, unused-variable
"""Schedule for pooling operators"""
-from .mprofile.dsp.pool import pool_dsp_schedule
+import logging
+from tvm import topi, te
+from tvm.target import Target
+from .. import tag
def schedule_pool(outs, layout):
- """Create schedule for avgpool/maxpool with dsp"""
- return pool_dsp_schedule(outs, layout)
+ """Create schedule for avgpool/maxpool"""
+
+ if layout != "NHWC":
+ logger = logging.getLogger("topi")
+ logger.warning(
+ """We currently only support NHWC target specific pools on arm_cpu,
+ falling back on generic pool scheduling"""
+ )
+ return topi.generic.schedule_pool(outs, layout)
+
+ return schedule_pool_2d(outs)
+
+
+def schedule_pool_2d(outs):
+ """Create arm_cpu specific 2D schedule for avgpool/maxpool"""
+
+ outs = [outs] if isinstance(outs, te.tensor.Tensor) else outs
+ schedule_ops = [x.op for x in outs]
+ schedule = te.create_schedule(schedule_ops)
+ scheduled_ops = []
+
+ def traverse(op):
+ # Recursively inline any injective operation that isn't the pooling
+ # operation or hasn't already been scheduled.
+ if tag.is_injective(op.tag):
+ if op not in schedule.outputs:
+ schedule[op].compute_inline()
+ for tensor in op.input_tensors:
+ if isinstance(tensor.op, te.tensor.ComputeOp) and tensor.op
not in scheduled_ops:
+ traverse(tensor.op)
+ # schedule the actual pooling operation
+ elif op.tag.startswith("pool"):
+ n, height, width, channel = schedule[op].op.axis
+ # Average pool consists of two parts; a sum then a division.
+ # We can schedule the division loop to parallelize across height
and
+ # vectorize across width.
+ enable_explicit_vectorization = not
Target.current(allow_none=False).features.has_sve
+ if op != outs[0].op:
+ output = outs[0]
+ output_fused = schedule[output].fuse(output.op.axis[1],
output.op.axis[2])
+ schedule[output].parallel(output_fused)
+ vectorization_factor = (
+ 8 if enable_explicit_vectorization else
output.op.axis[3].dom.extent
+ )
+ _, inner = schedule[output].split(output.op.axis[3],
vectorization_factor)
+ schedule[output].vectorize(inner)
+
+ padded_input = op.input_tensors[0]
+ if isinstance(padded_input.op, te.tensor.ComputeOp):
+ schedule[padded_input].compute_inline()
+
+ # For targets without SVE try explicitly vectorizing the channel
+ # loop, For SVE targets leave the loop in place for LLVM to convert
+ # into a scalable vector loop.
+ vectorization_factor = 8 if enable_explicit_vectorization else
channel.dom.extent
+ channel_outer, channel_inner = schedule[op].split(channel,
vectorization_factor)
+ schedule[op].vectorize(channel_inner)
+ schedule[op].parallel(height)
+ if len(schedule[op].op.reduce_axis) > 0:
+ filter_height, filter_width = schedule[op].op.reduce_axis
+ # We consider any filter of area < 10 to be small enough to
+ # unroll; 3x3 filters have shown better performance when
+ # unrolled.
+ if filter_height.dom.extent * filter_width.dom.extent <= 9:
+ # For small filters, unrolling the filter loops allows us
to
+ # vectorize over channels without reordering anything.
+ schedule[op].unroll(filter_width)
+ schedule[op].unroll(filter_height)
+ else:
+ # Reordering so that channels is the fastest moving axis
allows
+ # LLVM to vectorize across contiguous memory in the NHWC
+ # ordering.
+ schedule[op].reorder(
+ n, height, width, filter_height, filter_width,
channel_outer, channel_inner
+ )
+ else:
+ schedule[op].reorder(n, height, width, channel_outer,
channel_inner)
+ else:
+ raise RuntimeError("Unsupported operator: %s" % op.tag)
+
+ scheduled_ops.append(op)
+
+ traverse(outs[0].op)
+ return schedule
diff --git a/tests/python/topi/python/test_topi_pooling.py
b/tests/python/topi/python/test_topi_pooling.py
index 5f8aebabc2..0d0ee65ad4 100644
--- a/tests/python/topi/python/test_topi_pooling.py
+++ b/tests/python/topi/python/test_topi_pooling.py
@@ -28,6 +28,7 @@ from tvm.topi.utils import get_const_tuple
_pool_schedule = {
"generic": topi.generic.schedule_pool,
+ "arm_cpu": topi.arm_cpu.schedule_pool,
"cpu": topi.x86.schedule_pool,
"gpu": topi.cuda.schedule_pool,
"hls": topi.hls.schedule_pool,
