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#!/usr/bin/env python2.7
# Copyright 2017 gRPC authors.
#
# Licensed 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.
import collections
import ctypes
import math
import sys
import yaml
with open('src/core/lib/debug/stats_data.yaml') as f:
attrs = yaml.load(f.read())
types = (
(collections.namedtuple('Counter', 'name'), []),
(collections.namedtuple('Histogram', 'name max buckets'), []),
)
inst_map = dict((t[0].__name__, t[1]) for t in types)
stats = []
for attr in attrs:
found = False
for t, lst in types:
t_name = t.__name__.lower()
if t_name in attr:
name = attr[t_name]
del attr[t_name]
lst.append(t(name=name, **attr))
found = True
break
assert found, "Bad decl: %s" % attr
def dbl2u64(d):
return ctypes.c_ulonglong.from_buffer(ctypes.c_double(d)).value
def shift_works(mapped_bounds, shift_bits):
for a, b in zip(mapped_bounds, mapped_bounds[1:]):
if (a >> shift_bits) == (b >> shift_bits):
return False
return True
def find_max_shift(mapped_bounds):
for shift_bits in reversed(range(0,64)):
if shift_works(mapped_bounds, shift_bits):
return shift_bits
return -1
def gen_bucket_code(histogram):
bounds = [0, 1]
done_trivial = False
done_unmapped = False
first_nontrivial = None
first_unmapped = None
while len(bounds) < histogram.buckets:
mul = math.pow(float(histogram.max) / bounds[-1],
1.0 / (histogram.buckets - len(bounds)))
nextb = bounds[-1] * mul
if nextb < bounds[-1] + 1:
nextb = bounds[-1] + 1
elif not done_trivial:
done_trivial = True
first_nontrivial = len(bounds)
bounds.append(nextb)
if done_trivial:
code_bounds = [dbl2u64(x - first_nontrivial) for x in bounds]
shift_bits = find_max_shift(code_bounds[first_nontrivial:])
print first_nontrivial, shift_bits, bounds, [hex(x >> shift_bits) for x in code_bounds[first_nontrivial:]]
# utility: print a big comment block into a set of files
def put_banner(files, banner):
for f in files:
print >>f, '/*'
for line in banner:
print >>f, ' * %s' % line
print >>f, ' */'
print >>f
with open('src/core/lib/debug/stats_data.h', 'w') as H:
# copy-paste copyright notice from this file
with open(sys.argv[0]) as my_source:
copyright = []
for line in my_source:
if line[0] != '#': break
for line in my_source:
if line[0] == '#':
copyright.append(line)
break
for line in my_source:
if line[0] != '#':
break
copyright.append(line)
put_banner([H], [line[2:].rstrip() for line in copyright])
put_banner([H], ["Automatically generated by tools/codegen/core/gen_stats_data.py"])
print >>H, "#ifndef GRPC_CORE_LIB_DEBUG_STATS_DATA_H"
print >>H, "#define GRPC_CORE_LIB_DEBUG_STATS_DATA_H"
print >>H
for typename, instances in sorted(inst_map.items()):
print >>H, "typedef enum {"
for inst in instances:
print >>H, " GRPC_STATS_%s_%s," % (typename.upper(), inst.name.upper())
print >>H, " GRPC_STATS_%s_COUNT" % (typename.upper())
print >>H, "} grpc_stats_%ss;" % (typename.lower())
for ctr in inst_map['Counter']:
print >>H, ("#define GRPC_STATS_INC_%s(exec_ctx) " +
"GRPC_STATS_INC_COUNTER((exec_ctx), GRPC_STATS_COUNTER_%s)") % (
ctr.name.upper(), ctr.name.upper())
for histogram in inst_map['Histogram']:
print >>H, ("#define GRPC_STATS_INC_%s(exec_ctx, value) " +
"GRPC_STATS_INC_HISTOGRAM((exec_ctx), " +
"GRPC_STATS_HISTOGRAM_%s," +
"%s)") % (
histogram.name.upper(),
histogram.name.upper(),
gen_bucket_code(histogram))
print >>H, "extern const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT];"
print >>H
print >>H, "#endif /* GRPC_CORE_LIB_DEBUG_STATS_DATA_H */"
with open('src/core/lib/debug/stats_data.c', 'w') as C:
# copy-paste copyright notice from this file
with open(sys.argv[0]) as my_source:
copyright = []
for line in my_source:
if line[0] != '#': break
for line in my_source:
if line[0] == '#':
copyright.append(line)
break
for line in my_source:
if line[0] != '#':
break
copyright.append(line)
put_banner([C], [line[2:].rstrip() for line in copyright])
put_banner([C], ["Automatically generated by tools/codegen/core/gen_stats_data.py"])
print >>C, "#include \"src/core/lib/debug/stats_data.h\""
print >>C, "const char *grpc_stats_counter_name[GRPC_STATS_COUNTER_COUNT] = {";
for ctr in inst_map['Counter']:
print >>C, " \"%s\"," % ctr.name
print >>C, "};"
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