# 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 # # pylint: disable=missing-module-docstring # pylint: disable=missing-class-docstring # pylint: disable=missing-function-docstring import argparse import hashlib import io import json import os import subprocess import sys from typing import Dict, Optional, Union import urllib.request MINIMAL_HTML = """

""" # pylint: disable=too-few-public-methods class Node: def __init__(self, name: str, libtype: str): self.name = name # "root" | "kernel" | "" # "" indicates user space self.libtype = libtype self.value: int = 0 self.children: list[Node] = [] def to_json(self) -> Dict[str, Union[str, int, list[Dict]]]: return { "n": self.name, "l": self.libtype, "v": self.value, "c": [x.to_json() for x in self.children] } class FlameGraphCLI: def __init__(self, args): self.args = args self.stack = Node("all", "root") @staticmethod def get_libtype_from_dso(dso: Optional[str]) -> str: """ when kernel-debuginfo is installed, dso points to /usr/lib/debug/lib/modules/*/vmlinux """ if dso and (dso == "[kernel.kallsyms]" or dso.endswith("/vmlinux")): return "kernel" return "" @staticmethod def find_or_create_node(node: Node, name: str, libtype: str) -> Node: for child in node.children: if child.name == name: return child child = Node(name, libtype) node.children.append(child) return child def process_event(self, event) -> None: # ignore events where the event name does not match # the one specified by the user if self.args.event_name and event.get("ev_name") != self.args.event_name: return pid = event.get("sample", {}).get("pid", 0) # event["dso"] sometimes contains /usr/lib/debug/lib/modules/*/vmlinux # for user-space processes; let's use pid for kernel or user-space distinction if pid == 0: comm = event["comm"] libtype = "kernel" else: comm = f"{event['comm']} ({pid})" libtype = "" node = self.find_or_create_node(self.stack, comm, libtype) if "callchain" in event: for entry in reversed(event["callchain"]): name = entry.get("sym", {}).get("name", "[unknown]") libtype = self.get_libtype_from_dso(entry.get("dso")) node = self.find_or_create_node(node, name, libtype) else: name = event.get("symbol", "[unknown]") libtype = self.get_libtype_from_dso(event.get("dso")) node = self.find_or_create_node(node, name, libtype) node.value += 1 def get_report_header(self) -> str: if self.args.input == "-": # when this script is invoked with "perf script flamegraph", # no perf.data is created and we cannot read the header of it return "" try: # if the file name other than perf.data is given, # we read the header of that file if self.args.input: output = subprocess.check_output(["perf", "report", "--header-only", "-i", self.args.input]) else: output = subprocess.check_output(["perf", "report", "--header-only"]) result = output.decode("utf-8") if self.args.event_name: result += "\nFocused event: " + self.args.event_name return result except Exception as err: # pylint: disable=broad-except print(f"Error reading report header: {err}", file=sys.stderr) return "" def trace_end(self) -> None: stacks_json = json.dumps(self.stack, default=lambda x: x.to_json()) if self.args.format == "html": report_header = self.get_report_header() options = { "colorscheme": self.args.colorscheme, "context": report_header } options_json = json.dumps(options) template_md5sum = None if self.args.format == "html": if os.path.isfile(self.args.template): template = f"file://{self.args.template}" else: if not self.args.allow_download: print(f"""Warning: Flame Graph template '{self.args.template}' does not exist. To avoid this please install a package such as the js-d3-flame-graph or libjs-d3-flame-graph, specify an existing flame graph template (--template PATH) or use another output format (--format FORMAT).""", file=sys.stderr) if self.args.input == "-": print( """Not attempting to download Flame Graph template as script command line input is disabled due to using live mode. If you want to download the template retry without live mode. For example, use 'perf record -a -g -F 99 sleep 60' and 'perf script report flamegraph'. Alternatively, download the template from: https://cdn.jsdelivr.net/npm/d3-flame-graph@4.1.3/dist/templates/d3-flamegraph-base.html and place it at: /usr/share/d3-flame-graph/d3-flamegraph-base.html""", file=sys.stderr) sys.exit(1) s = None while s not in ["y", "n"]: s = input("Do you wish to download a template from cdn.jsdelivr.net?" + "(this warning can be suppressed with --allow-download) [yn] " ).lower() if s == "n": sys.exit(1) template = ("https://cdn.jsdelivr.net/npm/d3-flame-graph@4.1.3/dist/templates/" "d3-flamegraph-base.html") template_md5sum = "143e0d06ba69b8370b9848dcd6ae3f36" try: with urllib.request.urlopen(template) as url_template: output_str = "".join([ l.decode("utf-8") for l in url_template.readlines() ]) except Exception as err: print(f"Error reading template {template}: {err}\n" "a minimal flame graph will be generated", file=sys.stderr) output_str = MINIMAL_HTML template_md5sum = None if template_md5sum: download_md5sum = hashlib.md5(output_str.encode("utf-8")).hexdigest() if download_md5sum != template_md5sum: s = None while s not in ["y", "n"]: s = input(f"""Unexpected template md5sum. {download_md5sum} != {template_md5sum}, for: {output_str} continue?[yn] """).lower() if s == "n": sys.exit(1) output_str = output_str.replace("/** @options_json **/", options_json) output_str = output_str.replace("/** @flamegraph_json **/", stacks_json) output_fn = self.args.output or "flamegraph.html" else: output_str = stacks_json 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(f"dumping data to {output_fn}") try: with io.open(output_fn, "w", encoding="utf-8") as out: out.write(output_str) except IOError as err: print(f"Error writing output file: {err}", 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 flame graph HTML template") parser.add_argument("--colorscheme", default="blue-green", help="flame graph color scheme", choices=["blue-green", "orange"]) parser.add_argument("-i", "--input", help=argparse.SUPPRESS) parser.add_argument("--allow-download", default=False, action="store_true", help="allow unprompted downloading of HTML template") parser.add_argument("-e", "--event", default="", dest="event_name", type=str, help="specify the event to generate flamegraph for") cli_args = parser.parse_args() cli = FlameGraphCLI(cli_args) process_event = cli.process_event trace_end = cli.trace_end -21 16:05:57 +0100'>2020-04-21spi: bcm-qspi: Handle clock probe deferralFlorian Fainelli 2020-04-21spi: bcm-qspi: when tx/rx buffer is NULL set to 0Justin Chen 2020-04-21spi: bcm-qspi: Make PM suspend/resume work with SCMI clock managementKamal Dasu 2020-04-21spi: bcm-qspi: Drive MSPI peripheral SSb pin on cs_changeKamal Dasu 2020-01-07spi: bcm-qspi: Use platform_get_irq_byname_optional() to avoid error messageRayagonda Kokatanur 2019-11-07spi: bcm-qspi: Convert to use CS GPIO descriptorsChris Packham 2019-08-30spi: bcm-qspi: Make BSPI default modeRayagonda Kokatanur 2019-08-23Merge branch 'spi-5.3' into spi-5.4Mark Brown 2019-08-07spi: bcm-qspi: Fix BSPI QUAD and DUAL mode support when using flex modeRayagonda Kokatanur 2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459Thomas Gleixner 2018-10-11spi: bcm-qspi: switch back to reading flash using smaller chunksRafał Miłecki 2018-10-11spi: bcm-qspi: fix calculation of address lengthRafał Miłecki 2018-06-04Merge branch 'spi-4.17' into spi-4.18 for the merge windowMark Brown 2018-05-13spi: bcm-qspi: Fix build failure caused by spi_flash_read() API removalBoris Brezillon 2018-05-11spi: bcm-qspi: Implement the spi_mem interfaceBoris Brezillon 2018-05-02spi: bcm-qspi: Always read and set BSPI_MAST_N_BOOT_CTRLKamal Dasu 2018-05-02spi: bcm-qspi: Avoid setting MSPI_CDRAM_PCS for spi-nor masterKamal Dasu 2018-03-14spi: bcm-qspi: fIX some error handling pathsChristophe Jaillet 2017-10-12spi: bcm-qspi: Fix use after free in bcm_qspi_probe() in error pathFlorian Fainelli 2017-07-28spi: bcm-qspi: Remove hardcoded settings and spi-nor.h dependencyKamal Dasu 2017-02-20Merge tag 'spi-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni...Linus Torvalds 2017-02-14spi: bcm-qspi: Remove unnecessary platform_set_drvdata()Wei Yongjun 2017-02-14spi: bcm-qspi: Fix bcm_qspi_bspi_read() performanceKamal Dasu 2017-02-10mtd: spi-nor: rename SPINOR_OP_* macros of the 4-byte address op codesCyrille Pitchen 2017-01-31spi: bcm-qspi: Added mspi read fallback in bcm_qspi_flash_read()Kamal Dasu 2016-09-24spi: iproc-qspi: Add Broadcom iProc SoCs supportKamal Dasu 2016-09-16spi: bcm-qspi: Fix error return code in bcm_qspi_probe()Wei Yongjun 2016-09-16spi: bcm-qspi: Fix return value check in bcm_qspi_probe()Wei Yongjun 2016-09-16spi: bcm-qspi: fix suspend/resume #ifdefArnd Bergmann 2016-09-16spi: bcm-qspi: don't include linux/mtd/cfi.hArnd Bergmann 2016-09-14spi: bcm-qspi: Add BSPI spi-nor flash controller driverKamal Dasu 2016-09-14spi: bcm-qspi: Add Broadcom MSPI driverKamal Dasu