# flamegraph.py - create flame graphs from perf samples # SPDX-License-Identifier: GPL-2.0 # # Usage: # # perf record -a -g -F 99 sleep 60 # perf script report flamegraph # # Combined: # # perf script flamegraph -a -F 99 sleep 60 # # Written by Andreas Gerstmayr # Flame Graphs invented by Brendan Gregg # Works in tandem with d3-flame-graph by Martin Spier from __future__ import print_function import sys import os import io import argparse import json class Node: def __init__(self, name, libtype=""): self.name = name self.libtype = libtype self.value = 0 self.children = [] def toJSON(self): return { "n": self.name, "l": self.libtype, "v": self.value, "c": self.children } class FlameGraphCLI: def __init__(self, args): self.args = args self.stack = Node("root") if self.args.format == "html" and \ not os.path.isfile(self.args.template): print("Flame Graph template {} does not exist. Please install " "the js-d3-flame-graph (RPM) or libjs-d3-flame-graph (deb) " "package, specify an existing flame graph template " "(--template PATH) or another output format " "(--format FORMAT).".format(self.args.template), file=sys.stderr) sys.exit(1) def find_or_create_node(self, node, name, dso): libtype = "kernel" if dso == "[kernel.kallsyms]" else "" if name is None: name = "[unknown]" for child in node.children: if child.name == name and child.libtype == libtype: return child child = Node(name, libtype) node.children.append(child) return child def process_event(self, event): node = self.find_or_create_node(self.stack, event["comm"], None) if "callchain" in event: for entry in reversed(event['callchain']): node = self.find_or_create_node( node, entry.get("sym", {}).get("name"), event.get("dso")) else: node = self.find_or_create_node( node, entry.get("symbol"), event.get("dso")) node.value += 1 def trace_end(self): json_str = json.dumps(self.stack, default=lambda x: x.toJSON()) if self.args.format == "html": try: with io.open(self.args.template, encoding="utf-8") as f: output_str = f.read().replace("/** @flamegraph_json **/", json_str) except IOError as e: print("Error reading template file: {}".format(e), file=sys.stderr) sys.exit(1) output_fn = self.args.output or "flamegraph.html" else: output_str = json_str output_fn = self.args.output or "stacks.json" if output_fn == "-": with io.open(sys.stdout.fileno(), "w", encoding="utf-8", closefd=False) as out: out.write(output_str) else: print("dumping data to {}".format(output_fn)) try: with io.open(output_fn, "w", encoding="utf-8") as out: out.write(output_str) except IOError as e: print("Error writing output file: {}".format(e), file=sys.stderr) sys.exit(1) if __name__ == "__main__": parser = argparse.ArgumentParser(description="Create flame graphs.") parser.add_argument("-f", "--format", default="html", choices=["json", "html"], help="output file format") parser.add_argument("-o", "--output", help="output file name") parser.add_argument("--template", default="/usr/share/d3-flame-graph/d3-flamegraph-base.html", help="path to flamegraph HTML template") parser.add_argument("-i", "--input", help=argparse.SUPPRESS) args = parser.parse_args() cli = FlameGraphCLI(args) process_event = cli.process_event trace_end = cli.trace_end Hosts the 0x221E linux distro kernel.Ubuntu
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AgeCommit message (Expand)Author
2018-05-27Linux 4.1.52linux-4.1.ySasha Levin
2018-05-22kbuild: disable clang's default use of -fmerge-all-constantsDaniel Borkmann
2018-03-27Linux 4.1.51Sasha Levin
2018-03-05Linux 4.1.50Sasha Levin
2018-02-28kbuild: add '-fno-stack-check' to kernel build optionsLinus Torvalds
2018-01-22Linux 4.1.49Sasha Levin
2018-01-17disable new gcc-7.1.1 warnings for nowLinus Torvalds
2017-12-12Linux 4.1.48Sasha Levin
2017-12-06Linux 4.1.47Sasha Levin
2017-11-07Linux 4.1.46Sasha Levin
2017-10-16Linux 4.1.45Sasha Levin
2017-09-14Linux 4.1.44Sasha Levin
2017-08-05Linux 4.1.43Sasha Levin
2017-07-31jump label: fix passing kbuild_cflags when checking for asm goto supportGleb Fotengauer-Malinovskiy
2017-06-29Linux 4.1.42Sasha Levin
2017-06-25jump label: pass kbuild_cflags when checking for asm goto supportDavid Lin
2017-06-15Linux 4.1.41Sasha Levin
2017-05-28Linux 4.1.40Sasha Levin
2017-03-13Linux 4.1.39Sasha Levin
2017-01-18Linux 4.1.38Sasha Levin
2016-12-24Linux 4.1.37Sasha Levin
2016-11-29Linux 4.1.36Sasha Levin
2016-11-25kbuild: add -fno-PIESebastian Andrzej Siewior
2016-10-23Linux 4.1.35Sasha Levin
2016-10-09Linux 4.1.34Sasha Levin
2016-09-17Linux 4.1.33Sasha Levin
2016-09-02Linux 4.1.32Sasha Levin
2016-08-22Linux 4.1.31Sasha Levin
2016-08-08Linux 4.1.30Sasha Levin
2016-07-29Linux 4.1.29Sasha Levin
2016-07-13Linux 4.1.28Sasha Levin
2016-06-22Linux 4.1.27Sasha Levin
2016-06-06Linux 4.1.26Sasha Levin
2016-06-06kbuild: move -Wunused-const-variable to W=1 warning levelArnd Bergmann
2016-06-06gcov: disable tree-loop-im to reduce stack usageArnd Bergmann
2016-05-20Linux 4.1.25Sasha Levin
2016-05-11Linux 4.1.24Sasha Levin
2016-04-25Linux 4.1.23Sasha Levin
2016-04-19Linux 4.1.22Sasha Levin
2016-04-03Linux 4.1.21Sasha Levin
2016-03-17Linux 4.1.20Sasha Levin
2016-03-04Linux 4.1.19Sasha Levin
2016-02-15Linux 4.1.18Sasha Levin
2016-01-31Linux 4.1.17Greg Kroah-Hartman
2016-01-22Linux 4.1.16Greg Kroah-Hartman
2015-12-14Linux 4.1.15Greg Kroah-Hartman
2015-12-09Linux 4.1.14Greg Kroah-Hartman
2015-11-09Linux 4.1.13Greg Kroah-Hartman
2015-10-27Linux 4.1.12Greg Kroah-Hartman