-
Notifications
You must be signed in to change notification settings - Fork 85
/
gen_kernels.py
252 lines (201 loc) · 8.37 KB
/
gen_kernels.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
import glob
import os.path
import re
import subprocess
import sys
import time
base_dir = os.path.dirname(__file__)
maxas_dir = os.path.join(base_dir, "maxas")
sass_dir = os.path.join(base_dir, "sass")
# Tile sizes: m, n, k, vA,vB,vC div, op (dynamic shared options)
k128x128x8 = (128, 128, 8, 4, 4, 1, 2, 0, (0,))
k32x32x32 = ( 32, 32, 32, 4, 4, 1, 4, 0, (0, 2**14))
k32x64x32_NN = ( 32, 64, 32, 8, 4, 4, 4, 1, (0, 2**13))
k32x32x64_NT = ( 32, 32, 64, 8, 8, 4, 4, 1, (0,))
k16x64x64_NN = ( 16, 64, 64, 8, 4, 4, 4, 1, (0,))
k16x64x64_NT = ( 16, 64, 64, 8, 8, 4, 4, 1, (0,))
selections = {
"s" : {
"TN" : (k128x128x8, k32x32x32),
"NN" : (k128x128x8, k32x32x32),
"NT" : (k128x128x8, k32x32x32),
"TT" : (k128x128x8, k32x32x32),
},
"h" : {
"TN" : (k128x128x8, k32x32x32),
"NN" : (k128x128x8, k32x32x32, k32x64x32_NN, k16x64x64_NN),
"NT" : (k128x128x8, k32x32x32, k32x32x64_NT, k16x64x64_NT),
"TT" : (k128x128x8, k32x32x32),
},
}
kernels = {
# Generic gemm tiles
"sgemm_128x128x8": {"threads": 256, "sass": "xgemm_128x128x8", "params": "xgemm", "share": "(128*8 + 32)*4 + 4", "args": {"type": "s"} },
"hgemm_128x128x8": {"threads": 256, "sass": "xgemm_128x128x8", "params": "xgemm", "share": "(128*8 + 32)*4 + 4", "args": {"type": "h"} },
"sgemm_32x32x32": {"threads": 128, "sass": "xgemm_32x32x32", "params": "xgemm", "share": "(32*33)*4 + 4", "args": {"type": "s"} },
"hgemm_32x32x32": {"threads": 128, "sass": "xgemm_32x32x32", "params": "xgemm", "share": "(32*33)*4 + 4", "args": {"type": "h"} },
# Custom hgemm tiles designed for small minibatch RNNs
"hgemm_32x64x32_NN": {"threads": 128, "sass": "hgemm_32x64x32_NN", "params": "xgemm", "share": "32*33*2 + 64*32*2 + 4" },
"hgemm_32x32x64_NT": {"threads": 128, "sass": "hgemm_32x32x64_NT", "params": "xgemm", "share": "32*65*4 + 4" },
"hgemm_16x64x64_NN": {"threads": 128, "sass": "hgemm_16x64x64_NN", "params": "xgemm", "share": "(16*64 + 32)*2 + 64*64*2 + 4" },
"hgemm_16x64x64_NT": {"threads": 128, "sass": "hgemm_16x64x64_NT", "params": "xgemm", "share": "(16*64 + 32)*2 + (64*64 + 32)*2 + 4" },
}
_params = {
"xgemm": [
"float* param_C",
"float* param_A",
"float* param_B",
"float param_alpha",
"float param_beta",
"unsigned param_cda",
"unsigned param_cdb",
"unsigned param_cdc",
"unsigned param_m",
"unsigned param_n",
"unsigned param_k",
"unsigned param_blk_a",
"unsigned param_blk_b",
],
}
_space_re = re.compile(r"\s+")
_share_template = r"""
.shared .align 4 .b32 share[{0}];
"""
_kernel_template = r"""
.version {6}
.target {0}
.address_size 64
// args: {5}
.visible .entry {1}(
{2}
)
.reqntid {3}
{{
{4}
ret;
}}
"""
def _get_cache_dir(subdir=None):
cache_dir = 'temp/'
if subdir:
subdir = subdir if isinstance(subdir, list) else [subdir]
cache_dir = os.path.join(cache_dir, *subdir)
if not os.path.exists(cache_dir):
os.makedirs(cache_dir)
return cache_dir
def get_ptx_file(kernel_spec, kernel_name, arch, ptx_ver):
ptx_dir = _get_cache_dir([arch, 'ptx'])
thread_spec = kernel_spec["threads"]
args_spec = str(kernel_spec.get("args",""))
param_spec = _params[kernel_spec["params"]]
kernel_params = []
for p in param_spec:
ptype, pname = _space_re.split(p)
if ptype[-1] == '*':
ptype = '.u64'
elif ptype == 'float':
ptype = '.f32'
else:
ptype = '.u32'
kernel_params.append(" .param %s %s" % (ptype, pname))
kernel_params = ",\n".join(kernel_params)
if "share" in kernel_spec:
share = _share_template.format(eval(kernel_spec["share"]))
else:
share = ""
kernel_text = _kernel_template.format(arch, kernel_name, kernel_params, thread_spec, share, args_spec, ptx_ver)
kernel_ptx = os.path.join(ptx_dir, kernel_name + ".ptx")
current_text = ""
if os.path.exists(kernel_ptx):
f = open(kernel_ptx, "r")
current_text = f.read()
f.close()
# only write out the kernel if text has changed.
if kernel_text != current_text:
f = open(kernel_ptx, "w")
f.write(kernel_text)
f.close()
return kernel_ptx
include_re = re.compile(r'^<INCLUDE\s+file="([^"]+)"\s*/>')
def run_command(cmdlist):
cmd = " ".join(cmdlist)
proc = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = proc.communicate()
if proc.returncode:
raise RuntimeError("Error(%d):\n%s\n%s" % (proc.returncode, cmd, err))
def get_kernel(base_name, major, minor, options=None):
if major < 5:
raise RuntimeError("sass kernels require Maxwell or greater class hardware")
elif major >= 7:
raise RuntimeError("sm version 7 or greater is not supported")
arch = "sm_%d%d" % (major, minor)
libprefix = "PERL5LIB=%s" % maxas_dir
maxas_i = [libprefix, os.path.join(maxas_dir, "maxas.pl") + " -i -w"]
maxas_p = [libprefix, os.path.join(maxas_dir, "maxas.pl") + " -p"]
kernel_spec = kernels[base_name]
kernel_name = base_name
# static options
if "args" in kernel_spec:
for pair in kernel_spec["args"].items():
maxas_i.append("-D%s %s" % pair)
maxas_p.append("-D%s %s" % pair)
# dynamic options
if options is not None:
for opt in options:
if type(opt) is tuple:
maxas_i.append("-D%s %s" % opt)
maxas_p.append("-D%s %s" % opt)
kernel_name += "_%s%s" % opt
else:
maxas_i.append("-D%s 1" % opt)
maxas_p.append("-D%s 1" % opt)
kernel_name += "_%s" % opt
maxas_i.insert(2, "-k " + kernel_name)
sass_name = kernel_spec["sass"] + ".sass"
cubin_name = kernel_name + ".cubin"
cubin_dir = _get_cache_dir([arch, 'cubin'])
header_dir = os.path.join(base_dir, "include/kernels")
ptx_version = "4.2" if major < 6 else "5.0"
ptx_file = get_ptx_file(kernel_spec, kernel_name, arch, ptx_version)
cubin_file = os.path.join(cubin_dir, cubin_name)
sass_file = os.path.join(sass_dir, sass_name)
header_file = os.path.join(header_dir, kernel_name + "_" + arch + ".h")
if not os.path.exists(sass_file):
raise RuntimeError("Missing: %s for kernel: %s" % (sass_name, kernel_name))
# build the cubin and run maxas in the same command
# we don't want the chance of a generated cubin not processed by maxas (in case user hits ^C in between these steps)
command_string = [ "ptxas -v -arch", arch, "-o", cubin_file, ptx_file, ";" ] + maxas_i + [sass_file, cubin_file]
run_command(command_string)
cubin_mtime = time.time()
# now also generate the associated header file containing the cubin
with open(cubin_file, 'rb') as input_file:
with open(header_file, 'wb') as output_file:
output_file.write('const uint8_t %s[] = {' % (kernel_name + "_" + arch))
byte = input_file.read(1)
count = 0
while byte:
if count % 12 == 0:
output_file.write('\n ')
output_file.write(' 0x' + byte.encode('hex') + ',')
byte = input_file.read(1)
count += 1
output_file.write('\n};')
def gen_kernels():
for prefix in ['s', 'h']:
for op in ['NN', 'NT', 'TN', 'TT']:
for tileM, tileN, tileK, vecA, vecB, vecC, div, base_op, dyn_shared in selections[prefix][op]:
for vec in [False, True]:
for major, minor in [(5, 0), (6, 0)]:
if base_op:
# The op is part of the base kernel name
base = "%sgemm_%dx%dx%d_%s" % (prefix, tileM, tileN, tileK, op)
opts = ( "vec", ) if vec else ()
else:
# The op is an option passed to a more generic kernel
base = "%sgemm_%dx%dx%d" % (prefix, tileM, tileN, tileK)
opts = ( op, "vec" ) if vec else (op,)
get_kernel(base, major, minor, opts)
def main():
gen_kernels()
if __name__ == "__main__":
main()