forked from apache/tvm
/
runtime_ctypes.py
252 lines (219 loc) · 7.24 KB
/
runtime_ctypes.py
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"""Common runtime ctypes."""
# pylint: disable=invalid-name
from __future__ import absolute_import
import ctypes
import json
import numpy as np
from .base import _LIB, check_call
from .. import _api_internal
tvm_shape_index_t = ctypes.c_int64
class TypeCode(object):
"""Type code used in API calls"""
INT = 0
UINT = 1
FLOAT = 2
HANDLE = 3
NULL = 4
TVM_TYPE = 5
TVM_CONTEXT = 6
ARRAY_HANDLE = 7
NODE_HANDLE = 8
MODULE_HANDLE = 9
FUNC_HANDLE = 10
STR = 11
BYTES = 12
NDARRAY_CONTAINER = 13
EXT_BEGIN = 15
class TVMByteArray(ctypes.Structure):
"""Temp data structure for byte array."""
_fields_ = [("data", ctypes.POINTER(ctypes.c_byte)),
("size", ctypes.c_size_t)]
class TVMType(ctypes.Structure):
"""TVM datatype structure"""
_fields_ = [("type_code", ctypes.c_uint8),
("bits", ctypes.c_uint8),
("lanes", ctypes.c_uint16)]
CODE2STR = {
0 : 'int',
1 : 'uint',
2 : 'float',
4 : 'handle'
}
def __init__(self, type_str):
super(TVMType, self).__init__()
if isinstance(type_str, np.dtype):
type_str = str(type_str)
if type_str == "bool":
self.bits = 1
self.type_code = 1
self.lanes = 1
return
arr = type_str.split("x")
head = arr[0]
self.lanes = int(arr[1]) if len(arr) > 1 else 1
bits = 32
if head.startswith("int"):
self.type_code = 0
head = head[3:]
elif head.startswith("uint"):
self.type_code = 1
head = head[4:]
elif head.startswith("float"):
self.type_code = 2
head = head[5:]
elif head.startswith("handle"):
self.type_code = 4
bits = 64
head = ""
elif head.startswith("custom"):
low, high = head.find('['), head.find(']')
if not low or not high or low >= high:
raise ValueError("Badly formatted custom type string %s" % type_str)
type_name = head[low+1:high]
self.type_code = _api_internal._get_type_code(type_name)
head = head[high+1:]
else:
raise ValueError("Do not know how to handle type %s" % type_str)
bits = int(head) if head else bits
self.bits = bits
def __repr__(self):
if self.bits == 1 and self.lanes == 1:
return "bool"
if self.type_code in TVMType.CODE2STR:
type_name = TVMType.CODE2STR[self.type_code]
else:
type_name = "custom[%s]"%_api_internal._get_type_name(self.type_code)
x = "%s%d" % (type_name, self.bits)
if self.lanes != 1:
x += "x%d" % self.lanes
return x
def __eq__(self, other):
return (self.bits == other.bits and
self.type_code == other.type_code and
self.lanes == other.lanes)
def __ne__(self, other):
return not self.__eq__(other)
RPC_SESS_MASK = 128
class TVMContext(ctypes.Structure):
"""TVM context strucure."""
_fields_ = [("device_type", ctypes.c_int),
("device_id", ctypes.c_int)]
MASK2STR = {
1 : 'cpu',
2 : 'gpu',
4 : 'opencl',
5 : 'aocl',
6 : 'sdaccel',
7 : 'vulkan',
8 : 'metal',
9 : 'vpi',
10: 'rocm',
11: 'opengl',
12: 'ext_dev',
}
STR2MASK = {
'llvm': 1,
'stackvm': 1,
'cpu': 1,
'gpu': 2,
'cuda': 2,
'nvptx': 2,
'cl': 4,
'opencl': 4,
'aocl' : 5,
'aocl_sw_emu' : 5,
'sdaccel': 6,
'vulkan': 7,
'metal': 8,
'vpi': 9,
'rocm': 10,
'opengl': 11,
'ext_dev': 12,
}
def __init__(self, device_type, device_id):
super(TVMContext, self).__init__()
self.device_type = device_type
self.device_id = device_id
@property
def exist(self):
"""Whether this device exist."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 0) != 0
@property
def max_threads_per_block(self):
"""Maximum number of threads on each block."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 1)
@property
def warp_size(self):
"""Number of threads that executes in concurrent."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 2)
@property
def max_shared_memory_per_block(self):
"""Total amount of shared memory per block in bytes."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 3)
@property
def compute_version(self):
"""Get compute verison number in string.
Currently used to get compute capability of CUDA device.
Returns
-------
version : str
The version string in `major.minor` format.
"""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 4)
@property
def device_name(self):
"""Return the string name of device."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 5)
@property
def max_clock_rate(self):
"""Return the max clock frequency of device."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 6)
@property
def multi_processor_count(self):
"""Return the number of compute units of device."""
return _api_internal._GetDeviceAttr(
self.device_type, self.device_id, 7)
@property
def max_thread_dimensions(self):
"""Return the maximum size of each thread axis
Returns
-------
dims: List of int
The maximum length of threadIdx.x, threadIdx.y, threadIdx.z
"""
return json.loads(_api_internal._GetDeviceAttr(
self.device_type, self.device_id, 8))
def sync(self):
"""Synchronize until jobs finished at the context."""
check_call(_LIB.TVMSynchronize(self.device_type, self.device_id, None))
def __eq__(self, other):
return (isinstance(other, TVMContext) and
self.device_id == other.device_id and
self.device_type == other.device_type)
def __ne__(self, other):
return not self.__eq__(other)
def __repr__(self):
if self.device_type >= RPC_SESS_MASK:
tbl_id = self.device_type / RPC_SESS_MASK - 1
dev_type = self.device_type % RPC_SESS_MASK
return "remote[%d]:%s(%d)" % (
tbl_id, TVMContext.MASK2STR[dev_type], self.device_id)
return "%s(%d)" % (
TVMContext.MASK2STR[self.device_type], self.device_id)
class TVMArray(ctypes.Structure):
"""TVMValue in C API"""
_fields_ = [("data", ctypes.c_void_p),
("ctx", TVMContext),
("ndim", ctypes.c_int),
("dtype", TVMType),
("shape", ctypes.POINTER(tvm_shape_index_t)),
("strides", ctypes.POINTER(tvm_shape_index_t)),
("byte_offset", ctypes.c_uint64)]
TVMArrayHandle = ctypes.POINTER(TVMArray)