/usr/lib/python2.7/dist-packages/pyopencl/cache.py is in python-pyopencl 2016.1+git20161130-1.
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from __future__ import division, absolute_import
__copyright__ = "Copyright (C) 2011 Andreas Kloeckner"
__license__ = """
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
"""
import six
from six.moves import zip
import pyopencl.cffi_cl as _cl
import re
import sys
import os
from pytools import Record
try:
import hashlib
new_hash = hashlib.md5
except ImportError:
# for Python << 2.5
import md5
new_hash = md5.new
def _erase_dir(dir):
from os import listdir, unlink, rmdir
from os.path import join
for name in listdir(dir):
unlink(join(dir, name))
rmdir(dir)
def update_checksum(checksum, obj):
if isinstance(obj, six.text_type):
checksum.update(obj.encode("utf8"))
else:
checksum.update(obj)
# {{{ cleanup
class CleanupBase(object):
pass
class CleanupManager(CleanupBase):
def __init__(self):
self.cleanups = []
def register(self, c):
self.cleanups.insert(0, c)
def clean_up(self):
for c in self.cleanups:
c.clean_up()
def error_clean_up(self):
for c in self.cleanups:
c.error_clean_up()
class CacheLockManager(CleanupBase):
def __init__(self, cleanup_m, cache_dir):
if cache_dir is not None:
self.lock_file = os.path.join(cache_dir, "lock")
attempts = 0
while True:
try:
self.fd = os.open(self.lock_file,
os.O_CREAT | os.O_WRONLY | os.O_EXCL)
break
except OSError:
pass
from time import sleep
sleep(1)
attempts += 1
if attempts > 10:
from warnings import warn
warn("could not obtain cache lock--delete '%s' if necessary"
% self.lock_file)
cleanup_m.register(self)
def clean_up(self):
import os
os.close(self.fd)
os.unlink(self.lock_file)
def error_clean_up(self):
pass
class ModuleCacheDirManager(CleanupBase):
def __init__(self, cleanup_m, path):
from os import mkdir
self.path = path
try:
mkdir(self.path)
cleanup_m.register(self)
self.existed = False
except OSError:
self.existed = True
def sub(self, n):
from os.path import join
return join(self.path, n)
def reset(self):
import os
_erase_dir(self.path)
os.mkdir(self.path)
def clean_up(self):
pass
def error_clean_up(self):
_erase_dir(self.path)
# }}}
# {{{ #include dependency handling
C_INCLUDE_RE = re.compile(r'^\s*\#\s*include\s+[<"](.+)[">]\s*$',
re.MULTILINE)
def get_dependencies(src, include_path):
result = {}
from os.path import realpath, join
def _inner(src):
for match in C_INCLUDE_RE.finditer(src):
included = match.group(1)
found = False
for ipath in include_path:
included_file_name = realpath(join(ipath, included))
if included_file_name not in result:
try:
src_file = open(included_file_name, "rt")
except IOError:
continue
try:
included_src = src_file.read()
finally:
src_file.close()
# jrevent infinite recursion if some header file appears to
# include itself
result[included_file_name] = None
checksum = new_hash()
update_checksum(checksum, included_src)
_inner(included_src)
result[included_file_name] = (
os.stat(included_file_name).st_mtime,
checksum.hexdigest(),
)
found = True
break # stop searching the include path
if not found:
pass
_inner(src)
result = list((name,) + vals for name, vals in six.iteritems(result))
result.sort()
return result
def get_file_md5sum(fname):
checksum = new_hash()
inf = open(fname)
try:
contents = inf.read()
finally:
inf.close()
update_checksum(checksum, contents)
return checksum.hexdigest()
def check_dependencies(deps):
for name, date, md5sum in deps:
try:
possibly_updated = os.stat(name).st_mtime != date
except OSError:
return False
else:
if possibly_updated and md5sum != get_file_md5sum(name):
return False
return True
# }}}
# {{{ key generation
def get_device_cache_id(device):
from pyopencl.version import VERSION
platform = device.platform
return (VERSION,
platform.vendor, platform.name, platform.version,
device.vendor, device.name, device.version, device.driver_version)
def get_cache_key(device, options_bytes, src):
checksum = new_hash()
update_checksum(checksum, src)
update_checksum(checksum, options_bytes)
update_checksum(checksum, str(get_device_cache_id(device)))
return checksum.hexdigest()
# }}}
def retrieve_from_cache(cache_dir, cache_key):
class _InvalidInfoFile(RuntimeError):
pass
from os.path import join, isdir
module_cache_dir = join(cache_dir, cache_key)
if not isdir(module_cache_dir):
return None
cleanup_m = CleanupManager()
try:
try:
CacheLockManager(cleanup_m, cache_dir)
mod_cache_dir_m = ModuleCacheDirManager(cleanup_m, module_cache_dir)
info_path = mod_cache_dir_m.sub("info")
binary_path = mod_cache_dir_m.sub("binary")
# {{{ load info file
try:
from six.moves.cPickle import load
try:
info_file = open(info_path, "rb")
except IOError:
raise _InvalidInfoFile()
try:
try:
info = load(info_file)
except EOFError:
raise _InvalidInfoFile()
finally:
info_file.close()
except _InvalidInfoFile:
mod_cache_dir_m.reset()
from warnings import warn
warn("PyOpenCL encountered an invalid info file for cache key %s"
% cache_key)
return None
# }}}
# {{{ load binary
binary_file = open(binary_path, "rb")
try:
binary = binary_file.read()
finally:
binary_file.close()
# }}}
if check_dependencies(info.dependencies):
return binary, info.log
else:
mod_cache_dir_m.reset()
except:
cleanup_m.error_clean_up()
raise
finally:
cleanup_m.clean_up()
# {{{ top-level driver
class _SourceInfo(Record):
pass
def _create_built_program_from_source_cached(ctx, src, options_bytes,
devices, cache_dir, include_path):
from os.path import join
if cache_dir is None:
import appdirs
cache_dir = join(appdirs.user_cache_dir("pyopencl", "pyopencl"),
"pyopencl-compiler-cache-v2-py%s" % (
".".join(str(i) for i in sys.version_info),))
# {{{ ensure cache directory exists
try:
os.makedirs(cache_dir)
except OSError as e:
from errno import EEXIST
if e.errno != EEXIST:
raise
# }}}
if devices is None:
devices = ctx.devices
cache_keys = [get_cache_key(device, options_bytes, src) for device in devices]
binaries = []
to_be_built_indices = []
logs = []
for i, (device, cache_key) in enumerate(zip(devices, cache_keys)):
cache_result = retrieve_from_cache(cache_dir, cache_key)
if cache_result is None:
to_be_built_indices.append(i)
binaries.append(None)
logs.append(None)
else:
binary, log = cache_result
binaries.append(binary)
logs.append(log)
message = (75*"="+"\n").join(
"Build on %s succeeded, but said:\n\n%s" % (dev, log)
for dev, log in zip(devices, logs)
if log is not None and log.strip())
if message:
from pyopencl.cffi_cl import compiler_output
compiler_output(
"Built kernel retrieved from cache. Original from-source "
"build had warnings:\n"+message)
# {{{ build on the build-needing devices, in one go
result = None
already_built = False
if to_be_built_indices:
# defeat implementation caches:
from uuid import uuid4
src = src + "\n\n__constant int pyopencl_defeat_cache_%s = 0;" % (
uuid4().hex)
prg = _cl._Program(ctx, src)
prg.build(options_bytes, [devices[i] for i in to_be_built_indices])
prg_devs = prg.get_info(_cl.program_info.DEVICES)
prg_bins = prg.get_info(_cl.program_info.BINARIES)
prg_logs = prg._get_build_logs()
for dest_index in to_be_built_indices:
dev = devices[dest_index]
src_index = prg_devs.index(dev)
binaries[dest_index] = prg_bins[src_index]
_, logs[dest_index] = prg_logs[src_index]
if len(to_be_built_indices) == len(devices):
# Important special case: if code for all devices was built,
# then we may simply use the program that we just built as the
# final result.
result = prg
already_built = True
if result is None:
result = _cl._Program(ctx, devices, binaries)
# }}}
# {{{ save binaries to cache
if to_be_built_indices:
cleanup_m = CleanupManager()
try:
try:
CacheLockManager(cleanup_m, cache_dir)
for i in to_be_built_indices:
cache_key = cache_keys[i]
binary = binaries[i]
mod_cache_dir_m = ModuleCacheDirManager(cleanup_m,
join(cache_dir, cache_key))
info_path = mod_cache_dir_m.sub("info")
binary_path = mod_cache_dir_m.sub("binary")
source_path = mod_cache_dir_m.sub("source.cl")
outf = open(source_path, "wt")
outf.write(src)
outf.close()
outf = open(binary_path, "wb")
outf.write(binary)
outf.close()
from six.moves.cPickle import dump
info_file = open(info_path, "wb")
dump(_SourceInfo(
dependencies=get_dependencies(src, include_path),
log=logs[i]), info_file)
info_file.close()
except:
cleanup_m.error_clean_up()
raise
finally:
cleanup_m.clean_up()
# }}}
return result, already_built
def create_built_program_from_source_cached(ctx, src, options_bytes, devices=None,
cache_dir=None, include_path=None):
try:
if cache_dir is not False:
prg, already_built = _create_built_program_from_source_cached(
ctx, src, options_bytes, devices, cache_dir,
include_path=include_path)
else:
prg = _cl._Program(ctx, src)
already_built = False
except Exception as e:
raise
from pyopencl import Error
if (isinstance(e, Error)
and e.code == _cl.status_code.BUILD_PROGRAM_FAILURE):
# no need to try again
raise
from warnings import warn
from traceback import format_exc
warn("PyOpenCL compiler caching failed with an exception:\n"
"[begin exception]\n%s[end exception]"
% format_exc())
prg = _cl._Program(ctx, src)
already_built = False
if not already_built:
prg.build(options_bytes, devices)
return prg
# }}}
# vim: foldmethod=marker
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