142 lines
4.4 KiB
Python
Executable File
142 lines
4.4 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# alloc_instrumentation.py
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#
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# This source file is part of the FoundationDB open source project
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#
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# Copyright 2013-2019 Apple Inc. and the FoundationDB project authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import fileinput
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import argparse
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from collections import defaultdict
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# Processes the stdout produced by defining ALLOC_INSTRUMENTATION_STDOUT in FastAlloc.h
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allocs = {}
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class Allocation:
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def __init__(self, size, backtrace):
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self.size = size
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self.backtrace = backtrace
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def print_stacks(stack_count, sort_by_count):
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counts = defaultdict(int)
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sizes = defaultdict(int)
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for id, allocation in allocs.items():
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counts[allocation.backtrace] += 1
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sizes[allocation.backtrace] += allocation.size
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sort_dict = counts if sort_by_count else sizes
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ordered_list = [(val, backtrace) for (backtrace, val) in sort_dict.items()]
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ordered_list.sort()
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if stack_count:
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ordered_list = ordered_list[-stack_count:]
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for size, backtrace in ordered_list:
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print(
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str.format(
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"bytes={0:<10} count={1:<8} {2}",
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sizes[backtrace],
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counts[backtrace],
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backtrace,
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)
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)
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print("-" * 80)
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def process_line(line, quiet):
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items = line.split("\t")
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if items[0] == "Alloc":
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allocs[items[1]] = Allocation(size=int(items[2]), backtrace=items[3])
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elif items[0] == "Dealloc":
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allocs.pop(items[1], None)
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elif not quiet:
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print(line)
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def non_negative_int(value_str):
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value = int(value_str)
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if value < 0:
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raise argparse.ArgumentTypeError("%s is negative" % value)
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return value
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(
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description="Parses the output from enabling ALLOC_INSTRUMENTATION in FoundationDB and reports information about the top memory users."
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)
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parser.add_argument(
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"input_file",
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type=str,
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help="Path to file(s) containing the output from a run of FoundationDB with ALLOC_INSTRUMENTATION enabled. If not specified, stdin will be used.",
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default="-",
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nargs="*",
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)
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parser.add_argument(
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"-f",
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"--logging-frequency",
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type=non_negative_int,
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help="How frequently the top stacks will be logged, measured in lines of output processed. A value of 0 disables periodic logging. Defaults to 1,000,000.",
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default=1000000,
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)
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parser.add_argument(
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"-p",
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"--periodic-stack-count",
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type=non_negative_int,
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help="How many stack traces to log when periodically logging output. A value of 0 results in all stacks being logged. Defaults to 15.",
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default=15,
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)
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parser.add_argument(
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"-s",
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"--final-stack-count",
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type=non_negative_int,
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help="How many stack traces to log when finished processing output. A value of 0 results in all stacks being logged. Defaults to 0.",
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default=0,
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)
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parser.add_argument(
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"-c",
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"--sort-by-count",
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action="store_true",
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default=False,
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help="If specified, stacks will be sorted by largest count rather than largest number of bytes.",
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)
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parser.add_argument(
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"-q",
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"--quiet",
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action="store_true",
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default=False,
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help="If specified, lines from the input file that are not parsable by this tool will not be printed.",
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)
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args = parser.parse_args()
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# Process each line, periodically reporting the top stacks by size
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for line_num, line in enumerate(fileinput.input(args.input_file)):
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process_line(line.rstrip(), args.quiet)
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if (
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args.logging_frequency
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and line_num
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and line_num % args.logging_frequency == 0
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):
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print_stacks(args.periodic_stack_count, args.sort_by_count)
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# Print all stacks
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print_stacks(args.final_stack_count, args.sort_by_count)
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