async def async_characterization(self, impl_lib, dsn_name, specs_fname):
sim = DesignManager(self.bprj, specs_fname)
pprint.pprint(specs_fname)
await sim.verify_design(impl_lib, dsn_name, load_from_file=False)
# just copy the corresponding yaml file, so that everything is in one place
base_fname = os.path.basename(specs_fname)
copyfile(specs_fname, os.path.join(sim._root_dir, dsn_name+'/'+base_fname))
# print('name: {}'.format(dsn_name))
# dsn_name = list(sim.get_dsn_name_iter())[0]
summary = sim.get_result(dsn_name)
return summary
def simulate(prj, specs_fname):
# simulate and report result
sim = DesignManager(prj, specs_fname)
sim.characterize_designs(generate=True, measure=True, load_from_file=False)
# sim.test_layout(gen_sch=False)
dsn_name = list(sim.get_dsn_name_iter())[0]
summary = sim.get_result(dsn_name)
fname = summary['ac']['gain_w3db_file']
result = load_sim_file(fname)
gain = result['gain_vout']
w3db = result['w3db_vout']
print('%s gain = %.4g' % (dsn_name, gain))
print('%s w3db = %.4g' % (dsn_name, w3db))
return gain, w3db
def generate_and_sim(prj, generate=True):
ver_specs_fname = 'specs_verification/opamp_two_stage_1e8.yaml'
sim_specs_fname = 'specs_verification/opamp_two_stage_1e8_sim.yaml'
ver_specs = read_yaml(ver_specs_fname)
ver_specs['measurements'][0]['find_cfb'] = False
with open_file(sim_specs_fname, 'w') as f:
yaml.dump(ver_specs, f)
sim = DesignManager(prj, sim_specs_fname)
sim.characterize_designs(generate=generate,
measure=True,
load_from_file=False)
dsn_name = list(sim.get_dsn_name_iter())[0]
summary = sim.get_result(dsn_name)['opamp_ac']
print('result:')
pprint.pprint(summary)
def generate_and_sim(self):
"""
phase 1 of evaluation is generation of layout, schematic, LVS and RCX
If any of LVS or RCX fail results_ph1 will contain Exceptions for the corresponding instance
We proceed to phase 2 only if phase 1 was successful.
phase 2 is running the simulation with post extracted netlist view
Then we aggregate the results of phase 1 and phase 2 in a single list, in the same order
that designs were ordered, if phase 1 was failed the corresponding entry will contain
a Phase1Error exception
"""
results = []
with open_file(self.sim_specs_fname, 'w') as f:
yaml.dump(self.ver_specs, f)
sim = DesignManager(self.bprj, self.sim_specs_fname)
results_ph1 = sim.characterize_designs(generate=True, measure=False, load_from_file=False)
# hacky: do parallel measurements, you should not sweep anything other than 'swp_spec_file' in sweep_params
# the new yaml files themselves should not include any sweep_param
start = time.time()
impl_lib = self.ver_specs['impl_lib']
coro_list = []
file_list = self.ver_specs['sweep_params']['swp_spec_file']
for ph1_iter_index, combo_list in enumerate(sim.get_combinations_iter()):
dsn_name = sim.get_design_name(combo_list)
specs_fname = os.path.join(self.swp_spec_dir, file_list[ph1_iter_index] + '.yaml')
if isinstance(results_ph1[ph1_iter_index], Exception):
continue
coro_list.append(self.async_characterization(impl_lib, dsn_name, specs_fname))
results_ph2 = batch_async_task(coro_list)
print("sim time: {}".format(time.time() - start))
# this part returns the correct order of results if some of the instances failed phase1 of evaluation
ph2_iter_index = 0
for ph1_iter_index, combo_list in enumerate(sim.get_combinations_iter()):
if isinstance(results_ph1[ph1_iter_index], Exception):
results.append(Phase1Error)
else:
results.append(results_ph2[ph2_iter_index])
ph2_iter_index+=1
pprint.pprint(results)
return results
# -*- coding: utf-8 -*-
from bag.core import BagProject
from bag.simulation.core import DesignManager
if __name__ == '__main__':
config_file = 'specs_test/nch_w0d5.yaml'
local_dict = locals()
if 'bprj' not in local_dict:
print('creating BAG project')
bprj = BagProject()
else:
print('loading BAG project')
bprj = local_dict['bprj']
sim = DesignManager(bprj, config_file)
sim.test_layout(gen_sch=True)
"""
The script for testing the Design Manager Module
This file can generate layout/schematic, Do LVS and RCX, and run overdrive test recovery testbench
To be able to use this the top level yaml file has to follow certain conventions. DTSA.yaml is an example
"""
from bag import BagProject
from bag.simulation.core import DesignManager
from bag.io import read_yaml, open_file
if __name__ == '__main__':
local_dict = locals()
if 'bprj' not in local_dict:
print('creating BAG project')
bprj = BagProject()
else:
print('loading BAG project')
bprj = local_dict['bprj']
fname = 'specs_design/opamp_two_stage_1e8.yaml'
sim = DesignManager(bprj, fname)
sim.characterize_designs(generate=False,
measure=True,
load_from_file=False)
def __init__(self, *args, **kwargs):
self._temp_db = None
DesignManager.__init__(self, *args, **kwargs)
def design_close_loop(prj, funity_min_first=None, max_iter=100):
interp_method = 'spline'
nch_conf_list = [
'data/nch_w4_stack/specs.yaml',
]
pch_conf_list = [
'data/pch_w4_stack/specs.yaml',
]
amp_specs_fname = 'specs_design/opamp_two_stage_1e8.yaml'
ver_specs_fname = 'specs_verification/opamp_two_stage_1e8.yaml'
iter_cnt = 0
f_unit_min_sim = -1
k_max = 2.0
k_min = 1.1
print('create transistor database')
nch_db = MOSDBDiscrete(nch_conf_list, interp_method=interp_method)
pch_db = MOSDBDiscrete(pch_conf_list, interp_method=interp_method)
top_specs = read_yaml(amp_specs_fname)
funity_dsn_targ = funity_targ = top_specs['dsn_specs']['f_unit']
sim, dsn_info = None, None
summary = None
while f_unit_min_sim < funity_targ and iter_cnt < max_iter:
print('Iteration %d, f_unit_dsn_targ = %.4g' %
(iter_cnt, funity_dsn_targ))
top_specs['dsn_specs']['f_unit'] = funity_dsn_targ
if dsn_info is not None:
top_specs['dsn_specs']['i1_min_size'] = dsn_info['i1_size']
if funity_min_first is not None and iter_cnt == 0:
generate = False
f_unit_min_dsn = funity_min_first
else:
generate = True
dsn = design(top_specs, nch_db, pch_db)
dsn_info = dsn.get_dsn_info()
f_unit_min_dsn = min(dsn_info['f_unit'])
ver_specs = dsn.get_specs_verification(top_specs)
with open_file(ver_specs_fname, 'w') as f:
yaml.dump(ver_specs, f)
sim = DesignManager(prj, ver_specs_fname)
sim.characterize_designs(generate=generate,
measure=True,
load_from_file=False)
dsn_name = list(sim.get_dsn_name_iter())[0]
summary = sim.get_result(dsn_name)['opamp_ac']
funity_list = summary['funity']
print('Iteration %d, result:' % iter_cnt)
pprint.pprint(summary)
f_unit_min_sim = min(funity_list)
k = funity_targ / f_unit_min_sim
k_real = max(k_min, min(k, k_max))
print('k = %.4g, k_real = %.4g' % (k, k_real))
funity_dsn_targ = f_unit_min_dsn * k_real
iter_cnt += 1
print('close loop design done. Final result:')
pprint.pprint(summary)
return dsn_info
def __init__(
self,
spec_list, # type: List[str]
interp_method='spline', # type: str
bag_config_path=None, # type: Optional[str]
meas_type='mos_ss', # type: str
vgs_res=5e-3, # type: float
is_schematic=False,
width_var='w',
):
# type: (...) -> None
# error checking
tech_info = create_tech_info(bag_config_path=bag_config_path)
self._width_res = tech_info.tech_params['mos']['width_resolution']
self._sim_envs = None
self._ss_swp_names = None
self._manager_list = [] # type: List[DesignManager]
self._ss_list = []
self._ss_outputs = None
self._width_list = []
self._vgs_res = vgs_res
param_name = 'schematic_params' if is_schematic else 'layout_params'
for spec in spec_list:
dsn_manager = DesignManager(None, spec)
cur_width = dsn_manager.specs[param_name][width_var]
cur_width = int(round(cur_width / self._width_res))
self._width_list.append(cur_width)
# error checking
if 'w' in dsn_manager.swp_var_list:
raise ValueError(
'MOSDBDiscrete assumes transistor width is not swept.')
ss_fun_table = {}
for dsn_name in dsn_manager.get_dsn_name_iter():
meas_dir = dsn_manager.get_measurement_directory(
dsn_name, meas_type)
ss_dict = load_sim_file(
os.path.join(meas_dir, 'ss_params.hdf5'))
cur_corners = ss_dict['corner'].tolist()
cur_ss_swp_names = ss_dict['sweep_params']['ibias'][1:]
if self._sim_envs is None:
# assign attributes for the first time
self._sim_envs = cur_corners
self._ss_swp_names = cur_ss_swp_names
elif self._sim_envs != cur_corners:
raise ValueError(
'Simulation environments mismatch between given specs.'
)
elif self._ss_swp_names != cur_ss_swp_names:
raise ValueError(
'signal-signal parameter sweep names mismatch.')
cur_fun_dict = self._make_ss_functions(ss_dict, cur_corners,
cur_ss_swp_names,
interp_method)
if self._ss_outputs is None:
self._ss_outputs = sorted(cur_fun_dict.keys())
ss_fun_table[dsn_name] = cur_fun_dict
self._manager_list.append(dsn_manager)
self._ss_list.append(ss_fun_table)
self._env_list = self._sim_envs
self._cur_idx = 0
self._dsn_params = dict(w=self._width_list[0] * self._width_res)
