def _GetTarget(self, context):
"""Return a target instance suitable to run the test executable.
The choice of implementations is determined from the current context.
The global context may have provided a 'CompilationTest.target' variable
to indicate the Host subclass to use. In addition, we consider the
value of the 'ParallelActivator.num_processors' variable that may have
been set by the ParallelActivator resource.
If a value of num_processors > 1 is requested, we attempt to run the
executable using a command determined from the 'par_service.run'
variable. (This is typically 'mpirun'.)
If the requested target is LocalHost, we replace it
by CommandHost (which was designed precisely for such use-cases).
If it is a CommandHost or any other host instance that is known
to support injecting commands, we attempt to modify its arguments
appropriately.
Requesting num_processors > 1 with an unsupported host is an error
and yields an exception."""
# We can't use a regular import for LocalHost, as that wouldn't
# match the type found via 'get_extension_class'.
local_host = get_extension_class('local_host.LocalHost', 'host',
get_database())
target_desc = context.get('CompilationTest.target')
if target_desc is None:
host_class, arguments = local_host, {}
else:
f = lambda n: get_extension_class(n, 'host', get_database())
host_class, arguments = parse_descriptor(target_desc.strip(), f)
num_processors = context.get('ParallelActivator.num_processors', 1)
if num_processors > 1:
if host_class is local_host:
host_class = CommandHost
arguments['command'] = context.get('par_service.run')
arguments['command_args'] = ['-np', str(num_processors)]
elif host_class is CommandHost:
# Assume that the command is required to invoke any
# executable on this machine. Prepend the mpirun command
# simply as an argument in that case.
arguments['command_args'] = [
context.get('par_service.run'), '-np',
str(num_processors)
]
elif host_class is RemoteHost:
pass # ...
else:
raise Exception(
'target "%s" does not support parallel execution' %
target_desc)
path = context.get('par_service.run')
return host_class(arguments)
def _GetTarget(self, context):
"""Return a target instance suitable to run the test executable.
The choice of implementations is determined from the current context.
The global context may have provided a 'CompilationTest.target' variable
to indicate the Host subclass to use. In addition, we consider the
value of the 'ParallelActivator.num_processors' variable that may have
been set by the ParallelActivator resource.
If a value of num_processors > 1 is requested, we attempt to run the
executable using a command determined from the 'par_service.run'
variable. (This is typically 'mpirun'.)
If the requested target is LocalHost, we replace it
by CommandHost (which was designed precisely for such use-cases).
If it is a CommandHost or any other host instance that is known
to support injecting commands, we attempt to modify its arguments
appropriately.
Requesting num_processors > 1 with an unsupported host is an error
and yields an exception."""
# We can't use a regular import for LocalHost, as that wouldn't
# match the type found via 'get_extension_class'.
local_host = get_extension_class('local_host.LocalHost', 'host', get_database())
target_desc = context.get('CompilationTest.target')
if target_desc is None:
host_class, arguments = local_host, {}
else:
f = lambda n: get_extension_class(n, 'host', get_database())
host_class, arguments = parse_descriptor(target_desc.strip(), f)
num_processors = context.get('ParallelActivator.num_processors', 1)
if num_processors > 1:
if host_class is local_host:
host_class = CommandHost
arguments['command'] = context.get('par_service.run')
arguments['command_args'] = ['-np', str(num_processors)]
elif host_class is CommandHost:
# Assume that the command is required to invoke any
# executable on this machine. Prepend the mpirun command
# simply as an argument in that case.
arguments['command_args'] = [context.get('par_service.run'),
'-np', str(num_processors)]
elif host_class is RemoteHost:
pass # ...
else:
raise Exception('target "%s" does not support parallel execution'%target_desc)
path = context.get('par_service.run')
return host_class(arguments)
def _get_host(context, variable):
"""Get a host instance according to a particular context variable.
Return a default 'LocalHost' host if the variable is undefined.
'context' -- The context to read the host descriptor from.
'variable' -- The name to which the host descriptor is bound.
returns -- A Host instance.
"""
target_desc = context.get(variable)
if target_desc is None:
target = LocalHost({})
else:
f = lambda n: get_extension_class(n, "host", get_database())
host_class, arguments = parse_descriptor(target_desc.strip(), f)
target = host_class(arguments)
return target
def _get_host(context, variable):
"""Get a host instance according to a particular context variable.
Return a default 'LocalHost' host if the variable is undefined.
'context' -- The context to read the host descriptor from.
'variable' -- The name to which the host descriptor is bound.
returns -- A Host instance.
"""
target_desc = context.get(variable)
if target_desc is None:
target = LocalHost({})
else:
f = lambda n: get_extension_class(n, "host", get_database())
host_class, arguments = parse_descriptor(target_desc.strip(), f)
target = host_class(arguments)
return target
