From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9799038D686 for ; Sat, 25 Apr 2026 22:42:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777156947; cv=none; b=T+KJyYanwY9fouetXuTJM6WGRJoZKyELFVdNMKN/HAphtcaBOkkS4qQHXOgOGIdAGAWniPE2/ZFSvFjV7l+oVBkSoJN0XJ2YmpoCxkKv346gv+Cq4aISOT+TacIbpmLUcnQiHiOpiEtCN16SLkLNz26EbOU34C0l12ORrGoZgOU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777156947; c=relaxed/simple; bh=vx6IVFKsB1ON0PlvRVEBkeEhDRXrkHr25y7aVh90UHg=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=UOYpgCGeZ7YrAQTrRc3yDIEZ6z/YrxbVwR56Kp/wZPxklgC7B8HoOEzi+n4GwzENfxewVrefgaEWnMFl42f4Ns7yOQa06Y9mGaDB8DQSbfsy4tvR7JZDkDoxRUdf5n0xiPapOzlbre5iG0nxhxYFSpMFDS8fk65UkA7M3pUL1rI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=uQ+DnPw0; arc=none smtp.client-ip=209.85.214.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="uQ+DnPw0" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2b454cac322so84524265ad.2 for ; Sat, 25 Apr 2026 15:42:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777156945; x=1777761745; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=VLDLlf+sgEgN/cBLQvW28zSQKGyhqbeTTGXjAT4IZ18=; b=uQ+DnPw0+XSPUPZm0C3eB0hycTtUwVBw2SiV/YkX/NB+KpUl4UzvydrE1dooqGpEJu dq6mO9X+zyQF/uInxuGg1zQc7NN5wBAn2LlFNwKX6sff9CZvkYoBD9xOwrC8oSdQ3DMv Rau3PgD0ZnRc3e0J001r+uC/n2HRKcAmyb6mrv7dcnhRg5PqvmCXelsZF5cpl3Wqfy3b LL+ez4i7DmJasHrWwV6CVFIy5I2IVlADjuVOiTM7UUzZOcDcPAh3LwHdpU4EDovdO21D tAZgVE6tXmXgvx3RnAV07UOL+OiyQllvBM5pJIQMzG62ZUTutJe583rRUGSN6Vv6n+gx x7Tw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777156945; x=1777761745; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=VLDLlf+sgEgN/cBLQvW28zSQKGyhqbeTTGXjAT4IZ18=; b=tJGJ/8cmqlN75dANZRKp2mXx7pFNeettIkRljQ6O7ah5YpAkRxfQ9V/6h1LsB5iR/R y/0jtMf58guPwX9FtPyJp/VvegBlDAl3tv8QC8CglM0VxpZHqg56/Sa5oEMqPIW4yAR+ 2L0HdKaSGmSNN/jiUwemVp0mdZD8fCkDUx0JQORKbakaGpTj4f4MbB0q1pnPNFd/IzAi 2l6Sx1aexig1NAiuiuUcxFrtT40Rr1SijIlx3NAXHGo8rlLvm7yPh2Cd2lfjY71ewIOD nCMHuKtf0AYJMp1gjbZkmBObEzyhris2Nf88TO5cdknjQN2jDPedgO0rJOJyhTmWDSiW cREw== X-Forwarded-Encrypted: i=1; AFNElJ+1suPw1pXZsVP6YK63eOVDtu8e3zClf+qXc4+P5oHbZ/RhFMoZ63bcmO2Vnqkb4yfWFGL0PH2xaYa61apXbmxB@vger.kernel.org X-Gm-Message-State: AOJu0Yz/95qPYiX5dKOUtt0TC03Ed5GzGKFKvXDR1Wu0HRMvq7dY8uR3 Xa/Arxb/b2ym/T8ma/80ac+WPGFnnS4lAInVJVNs5Bh/3u+ngDE0BIy5AxTww3RQBcPBy18NQBG isbHFSlAQ1A== X-Received: from pghx8.prod.google.com ([2002:a63:f708:0:b0:c79:26bb:5545]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:6d91:b0:39b:89e0:2e37 with SMTP id adf61e73a8af0-3a08d6f22bfmr39696669637.14.1777156944816; Sat, 25 Apr 2026 15:42:24 -0700 (PDT) Date: Sat, 25 Apr 2026 15:40:51 -0700 In-Reply-To: <20260425224125.160890-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260425174858.3922152-1-irogers@google.com> <20260425224125.160890-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260425224125.160890-27-irogers@google.com> Subject: [PATCH v7 26/59] perf mem-phys-addr: Port mem-phys-addr to use python module From: Ian Rogers To: acme@kernel.org, adrian.hunter@intel.com, james.clark@linaro.org, leo.yan@linux.dev, namhyung@kernel.org, tmricht@linux.ibm.com Cc: alice.mei.rogers@gmail.com, dapeng1.mi@linux.intel.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mingo@redhat.com, peterz@infradead.org, Ian Rogers Content-Type: text/plain; charset="UTF-8" Give an example of using the perf python session API to load a perf.data file and perform the behavior of tools/perf/scripts/python/mem-phys-addr.py. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- v2: Added command line '-i' option and cleaned up pylint issues. --- tools/perf/python/mem-phys-addr.py | 117 +++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100755 tools/perf/python/mem-phys-addr.py diff --git a/tools/perf/python/mem-phys-addr.py b/tools/perf/python/mem-phys-addr.py new file mode 100755 index 000000000000..ba874d7a2011 --- /dev/null +++ b/tools/perf/python/mem-phys-addr.py @@ -0,0 +1,117 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +"""mem-phys-addr.py: Resolve physical address samples""" +import argparse +import bisect +import collections +from dataclasses import dataclass +import re +from typing import (Dict, Optional) + +import perf + +@dataclass(frozen=True) +class IomemEntry: + """Read from a line in /proc/iomem""" + begin: int + end: int + indent: int + label: str + +# Physical memory layout from /proc/iomem. Key is the indent and then +# a list of ranges. +iomem: Dict[int, list[IomemEntry]] = collections.defaultdict(list) +# Child nodes from the iomem parent. +children: Dict[IomemEntry, set[IomemEntry]] = collections.defaultdict(set) +# Maximum indent seen before an entry in the iomem file. +max_indent: int = 0 +# Count for each range of memory. +load_mem_type_cnt: Dict[IomemEntry, int] = collections.Counter() +# Perf event name set from the first sample in the data. +event_name: Optional[str] = None + +def parse_iomem(iomem_path: str): + """Populate iomem from iomem file""" + global max_indent + with open(iomem_path, 'r', encoding='ascii') as f: + for line in f: + indent = 0 + while line[indent] == ' ': + indent += 1 + max_indent = max(max_indent, indent) + m = re.split('-|:', line, maxsplit=2) + begin = int(m[0], 16) + end = int(m[1], 16) + label = m[2].strip() + entry = IomemEntry(begin, end, indent, label) + # Before adding entry, search for a parent node using its begin. + if indent > 0: + parent = find_memory_type(begin) + assert parent, f"Given indent expected a parent for {label}" + children[parent].add(entry) + iomem[indent].append(entry) + +def find_memory_type(phys_addr) -> Optional[IomemEntry]: + """Search iomem for the range containing phys_addr with the maximum indent""" + for i in range(max_indent, -1, -1): + if i not in iomem: + continue + position = bisect.bisect_right(iomem[i], phys_addr, + key=lambda entry: entry.begin) + if position is None: + continue + iomem_entry = iomem[i][position-1] + if iomem_entry.begin <= phys_addr <= iomem_entry.end: + return iomem_entry + print(f"Didn't find {phys_addr}") + return None + +def print_memory_type(): + """Print the resolved memory types and their counts.""" + print(f"Event: {event_name}") + print(f"{'Memory type':<40} {'count':>10} {'percentage':>10}") + print(f"{'-' * 40:<40} {'-' * 10:>10} {'-' * 10:>10}") + total = sum(load_mem_type_cnt.values()) + # Add count from children into the parent. + for i in range(max_indent, -1, -1): + if i not in iomem: + continue + for entry in iomem[i]: + for child in children[entry]: + if load_mem_type_cnt[child] > 0: + load_mem_type_cnt[entry] += load_mem_type_cnt[child] + + def print_entries(entries): + """Print counts from parents down to their children""" + for entry in sorted(entries, + key = lambda entry: load_mem_type_cnt[entry], + reverse = True): + count = load_mem_type_cnt[entry] + if count > 0: + mem_type = ' ' * entry.indent + f"{entry.begin:x}-{entry.end:x} : {entry.label}" + percent = 100 * count / total + print(f"{mem_type:<40} {count:>10} {percent:>10.1f}") + print_entries(children[entry]) + + print_entries(iomem[0]) + +if __name__ == "__main__": + ap = argparse.ArgumentParser(description="Resolve physical address samples") + ap.add_argument("-i", "--input", default="perf.data", help="Input file name") + ap.add_argument("--iomem", default="/proc/iomem", help="Path to iomem file") + args = ap.parse_args() + + def process_event(sample): + """Process a single sample event.""" + phys_addr = sample.sample_phys_addr + entry = find_memory_type(phys_addr) + if entry: + load_mem_type_cnt[entry] += 1 + + global event_name + if event_name is None: + event_name = str(sample.evsel) + + parse_iomem(args.iomem) + perf.session(perf.data(args.input), sample=process_event).process_events() + print_memory_type() -- 2.54.0.545.g6539524ca2-goog