From nobody Mon Feb 9 21:18:54 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08074C7EE23 for ; Fri, 26 May 2023 18:34:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242598AbjEZSeZ (ORCPT ); Fri, 26 May 2023 14:34:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242496AbjEZSeU (ORCPT ); Fri, 26 May 2023 14:34:20 -0400 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E851CE62 for ; Fri, 26 May 2023 11:34:12 -0700 (PDT) Received: by mail-pj1-x104a.google.com with SMTP id 98e67ed59e1d1-255dfed764dso1394438a91.1 for ; Fri, 26 May 2023 11:34:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1685126052; x=1687718052; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=ebDmAKcMgjMG509wnFyrTUPwJyUM0h3NbQ8A7cysfQ0=; b=OV1TvpXGpGm5MLs6Mh/URj5q11pFxOE0Pq/aTWDMR9PFQN1iMItLpAMs3hSe5FPK6B TCrvq4wBk0Bt6Ro0RPhK4ENdsqMhutdlHfG4j2n6GJQnkvpVr6IBB0qujDx+I6VJ1wU3 R5i+XfuZp7r05tkVfaMfD1mU1PEdnBXufxosZghTLlAnmbnHSm3UrrCC/ji6wFQ+LrjP 1xz+2nv0nqllptmrqwhYDEAekiiNNuB6OE8UQWvtRkzb486aVxo3isWty86FkFB0zUVY iGLWO5vHReTy+cvNcwofn4j4NaUofXC1GTs8lUQvcBYqWp7ZmUPbe78t34xNThF9ExWv S/Gg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685126052; x=1687718052; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ebDmAKcMgjMG509wnFyrTUPwJyUM0h3NbQ8A7cysfQ0=; b=JTmfBlozl0Z74VQZBGzo84QKPvGiwAnI/JCAioQnhmuKCcI383EmSaO+BjXItpRkjn GvrB3gTJJ10v5Jb0H6co9St1CCbU8V7Rc0T8jLINKpWynh1kf5BB1dC3joLD0p9P4hQ6 gxHQSaVq3iVEflJ8285erO7YG8M6OE/VxEK9bZzg6UMxnqM38Ot4Xg2zuw7UXikBqnnO RXRiirJ+Txiv9ayuGj/ujojdgI6CXMXfNoZN54WvjdvlUFgObptqvDWdfBY3P4XLeenS Xu6JeOwoZthz4iDeKk3FzX4IQL97s77UkSfPqiLQcMqcOzKU1lV61jg/qfEZsnQfYdn/ tfiA== X-Gm-Message-State: AC+VfDznoegQR6P3FnBaIkrDA+jzjvKzlo7tiqWM5isxPELOaMyQI0Zp jUpBqmYxZPPPN65Yk+ft0++1MJ8kpU8H X-Google-Smtp-Source: ACHHUZ7/hC7A5d3iCEZFXKr8J780KUcDmxhUabVPrKmWkXgja76tEtD0TOBYgcVxSXpNsAWc4fIgyEln64Zh X-Received: from irogers.svl.corp.google.com ([2620:15c:2d4:203:3b4e:312c:644:a642]) (user=irogers job=sendgmr) by 2002:a17:902:c948:b0:1a9:baa8:359f with SMTP id i8-20020a170902c94800b001a9baa8359fmr890440pla.6.1685126052431; Fri, 26 May 2023 11:34:12 -0700 (PDT) Date: Fri, 26 May 2023 11:33:46 -0700 In-Reply-To: <20230526183401.2326121-1-irogers@google.com> Message-Id: <20230526183401.2326121-2-irogers@google.com> Mime-Version: 1.0 References: <20230526183401.2326121-1-irogers@google.com> X-Mailer: git-send-email 2.41.0.rc0.172.g3f132b7071-goog Subject: [PATCH v2 01/16] perf header: Make nodes dynamic in write_mem_topology From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , "Masami Hiramatsu (Google)" , "Steven Rostedt (Google)" , Ross Zwisler , Leo Yan , Tiezhu Yang , Yang Jihong , Andi Kleen , Kan Liang , Ravi Bangoria , Sean Christopherson , K Prateek Nayak , Paolo Bonzini , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Avoid a large static array, dynamically allocate the nodes avoiding a hard coded limited as well. Signed-off-by: Ian Rogers --- tools/perf/util/header.c | 41 ++++++++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 16 deletions(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 2dde3ca20de5..f3c0cd8f6244 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -24,6 +24,7 @@ #include #endif #include +#include // reallocarray =20 #include "dso.h" #include "evlist.h" @@ -1396,13 +1397,14 @@ static int memory_node__sort(const void *a, const v= oid *b) return na->node - nb->node; } =20 -static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cn= tp) +static int build_mem_topology(struct memory_node **nodesp, u64 *cntp) { char path[PATH_MAX]; struct dirent *ent; DIR *dir; - u64 cnt =3D 0; int ret =3D 0; + size_t cnt =3D 0, size =3D 0; + struct memory_node *nodes =3D NULL; =20 scnprintf(path, PATH_MAX, "%s/devices/system/node/", sysfs__mountpoint()); @@ -1426,26 +1428,32 @@ static int build_mem_topology(struct memory_node *n= odes, u64 size, u64 *cntp) if (r !=3D 1) continue; =20 - if (WARN_ONCE(cnt >=3D size, - "failed to write MEM_TOPOLOGY, way too many nodes\n")) { - closedir(dir); - return -1; - } + if (cnt >=3D size) { + struct memory_node *new_nodes =3D + reallocarray(nodes, cnt + 4, sizeof(*nodes)); =20 + if (!new_nodes) { + pr_err("Failed to write MEM_TOPOLOGY, size %zd nodes\n", size); + ret =3D -ENOMEM; + goto out; + } + nodes =3D new_nodes; + size +=3D 4; + } ret =3D memory_node__read(&nodes[cnt++], idx); } - - *cntp =3D cnt; +out: closedir(dir); - - if (!ret) + if (!ret) { + *cntp =3D cnt; + *nodesp =3D nodes; qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort); + } else + free(nodes); =20 return ret; } =20 -#define MAX_MEMORY_NODES 2000 - /* * The MEM_TOPOLOGY holds physical memory map for every * node in system. The format of data is as follows: @@ -1464,8 +1472,8 @@ static int build_mem_topology(struct memory_node *nod= es, u64 size, u64 *cntp) static int write_mem_topology(struct feat_fd *ff __maybe_unused, struct evlist *evlist __maybe_unused) { - static struct memory_node nodes[MAX_MEMORY_NODES]; - u64 bsize, version =3D 1, i, nr; + struct memory_node *nodes =3D NULL; + u64 bsize, version =3D 1, i, nr =3D 0; int ret; =20 ret =3D sysfs__read_xll("devices/system/memory/block_size_bytes", @@ -1473,7 +1481,7 @@ static int write_mem_topology(struct feat_fd *ff __ma= ybe_unused, if (ret) return ret; =20 - ret =3D build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr); + ret =3D build_mem_topology(&nodes, &nr); if (ret) return ret; =20 @@ -1508,6 +1516,7 @@ static int write_mem_topology(struct feat_fd *ff __ma= ybe_unused, } =20 out: + free(nodes); return ret; } =20 --=20 2.41.0.rc0.172.g3f132b7071-goog