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#!/usr/bin/env python3
"""analyze-kconfig - Generate a model for KConfig selections
analyze-kconfig builds a model determining system attributes
(e.g. ROM or RAM usage) based on KConfig configuration variables.
Only boolean variables are supported at the moment.
"""
import argparse
import json
import kconfiglib
import logging
import os
import numpy as np
from dfatool.loader import KConfigAttributes
from dfatool.model import KConfigModel
def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter, description=__doc__
)
parser.add_argument(
"--failing-symbols",
action="store_true",
help="Show Kconfig symbols related to build failures. Must be used with an experiment result directory.",
)
parser.add_argument(
"--nop-symbols",
action="store_true",
help="Show Kconfig symbols which are only present in a single configuration. Must be used with an experiment result directory.",
)
parser.add_argument(
"--export-tree",
type=str,
help="Export decision tree model to file",
metavar="FILE",
)
parser.add_argument(
"--config",
type=str,
help="Show model results for symbols in .config file",
metavar="FILE",
)
parser.add_argument(
"--attribute", choices=["rom", "ram"], default="rom", help="Model attribute"
)
parser.add_argument(
"--max-loss",
type=float,
help="Maximum acceptable model loss for DecisionTree Leaves",
default=10,
)
parser.add_argument(
"--log-level",
default=logging.INFO,
type=lambda level: getattr(logging, level.upper()),
help="Set log level",
)
parser.add_argument(
"--info", action="store_true", help="Show Kconfig and benchmark information"
)
parser.add_argument(
"--sample-size",
type=int,
help="Restrict model generation to N random samples",
metavar="N",
)
parser.add_argument("kconfig_path", type=str, help="Path to Kconfig file")
parser.add_argument(
"model",
type=str,
help="Path to experiment results directory or model.json file",
)
args = parser.parse_args()
if isinstance(args.log_level, int):
logging.basicConfig(level=args.log_level)
else:
print(f"Invalid log level. Setting log level to INFO.", file=sys.stderr)
if os.path.isdir(args.model):
data = KConfigAttributes(args.kconfig_path, args.model)
if args.failing_symbols:
show_failing_symbols(data)
if args.nop_symbols:
show_nop_symbols(data)
if args.sample_size:
shuffled_data_indices = np.random.permutation(np.arange(len(data.data)))
sample_indices = shuffled_data_indices[: args.sample_size]
model = KConfigModel.from_benchmark(
data, args.attribute, indices=sample_indices
)
else:
model = KConfigModel.from_benchmark(data, args.attribute)
if args.max_loss:
model.max_loss = args.max_loss
model.build_tree()
else:
with open(args.model, "r") as f:
model = KConfigModel.from_json(json.load(f))
if args.info:
print("TODO")
if args.export_tree:
with open(args.export_tree, "w") as f:
json.dump(model.to_json(), f)
if args.config:
kconf = kconfiglib.Kconfig(args.kconfig_path)
kconf.load_config(args.config)
print(f"Model result for .config: {model.value_for_config(kconf)}")
for symbol in model.symbols:
kconf2 = kconfiglib.Kconfig(args.kconfig_path)
kconf2.load_config(args.config)
kconf_sym = kconf2.syms[symbol]
if kconf_sym.tri_value == 0 and 2 in kconf_sym.assignable:
kconf_sym.set_value(2)
elif kconf_sym.tri_value == 2 and 0 in kconf_sym.assignable:
kconf_sym.set_value(0)
else:
continue
# specific to multipass:
# Do not suggest changes which affect the application
skip = False
num_changes = 0
changed_symbols = list()
for i, csymbol in enumerate(model.symbols):
if kconf.syms[csymbol].tri_value != kconf2.syms[csymbol].tri_value:
num_changes += 1
changed_symbols.append(csymbol)
if (
csymbol.startswith("app_")
and kconf.syms[csymbol].tri_value
!= kconf2.syms[csymbol].tri_value
):
skip = True
break
if skip:
continue
try:
model_diff = model.value_for_config(kconf2) - model.value_for_config(
kconf
)
if kconf_sym.choice:
print(
f"Setting {kconf_sym.choice.name} to {kconf_sym.name} changes {num_changes:2d} symbols, model change: {model_diff:+5.0f}"
)
else:
print(
f"Setting {symbol} to {kconf_sym.str_value} changes {num_changes:2d} symbols, model change: {model_diff:+5.0f}"
)
except TypeError:
if kconf_sym.choice:
print(
f"Setting {kconf_sym.choice.name} to {kconf_sym.name} changes {num_changes:2d} symbols, model is undefined"
)
else:
print(
f"Setting {symbol} to {kconf_sym.str_value} changes {num_changes:2d} symbols, model is undefined"
)
for changed_symbol in changed_symbols:
print(
f" {changed_symbol:30s} -> {kconf2.syms[changed_symbol].str_value}"
)
def show_failing_symbols(data):
for symbol in data.symbol_names:
failed_true = len(
list(filter(lambda config: config[symbol] == True, data.failures))
)
failed_false = len(
list(filter(lambda config: config[symbol] == False, data.failures))
)
success_true = len(
list(filter(lambda config: config[0][symbol] == True, data.data))
)
success_false = len(
list(filter(lambda config: config[0][symbol] == False, data.data))
)
if success_false == 0 and failed_false > 0:
print(f"Setting {symbol} to n reliably causes the build to fail")
if success_true == 0 and failed_true > 0:
print(f"Setting {symbol} to y reliably causes the build to fail")
def show_nop_symbols(data):
for symbol in data.symbol_names:
true_count = len(
list(filter(lambda config: config[symbol] == True, data.failures))
) + len(list(filter(lambda config: config[0][symbol] == True, data.data)))
false_count = len(
list(filter(lambda config: config[symbol] == False, data.failures))
) + len(list(filter(lambda config: config[0][symbol] == False, data.data)))
if false_count == 0:
print(f"Symbol {symbol} is never n")
if true_count == 0:
print(f"Symbol {symbol} is never y")
pass
if __name__ == "__main__":
main()
|
