From nobody Sun Feb 8 17:43:11 2026 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 68B0637880E for ; Tue, 3 Feb 2026 22:51:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770159104; cv=none; b=Q65MRJK0MemDTBynyYO7tFO0FltHXIsByA3O9o1j0gZxJlyoZ8PTykp/XqWsG5wfwSBlzBS+9YjKIDJf2KVtjVuxueB8kngYbs530SEd/hPVxSdliHXVFdJAB3bjvHBolWFT3sli8W56HEyComXoqAo+eGS9M9Dx2Fcmm8yqDNw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770159104; c=relaxed/simple; bh=Lszd0UdRB8GQidhdx5Z+Lj/C2pK9X74pxC+as6fOUOI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=MZbT0eUduxlKlTQEt17k0RPZQHnDXZ9OjQ50QrnCCqhWrTg2Epsxof4dZPlqoDJHNQD/4c31NIhs4q9Lb7IMewh0RQSrR/8HBOvTl7XRhrdrx4wAPAP3kozxa0+//s8dIbqJvGaaYLk7t2shYu3H4xgbihtjxncm/Z2Jx5Fve44= 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=UMTVSE8O; arc=none smtp.client-ip=74.125.82.202 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="UMTVSE8O" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2b82974bd26so979118eec.1 for ; Tue, 03 Feb 2026 14:51:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1770159102; x=1770763902; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=trHHoM5lxs3R3c1XXOrfjjzTr20GXbuQCFUGYGyaPS8=; b=UMTVSE8Opdysybw1ciMXZ2wQe9F62QqECocfQ81UuYxdFiyUJ0PmFwNrjHSufpKzjW XRHxdN/SedmLi0HYPMVx4ScqL6I8Ng6aybjJV1H8tmwksoVMIrZisEDoBGHh86Z7qW8U XC3Y1h3H6sHFJC+lUU01vxNCS5Q5/SJ16HxFlwNP8R0vTpB9+7+izqlHy76QSvVvM+rw ZAtXk5LLAuM/2sTlnSZN/mzYAsVW13+737qa3XjIuf7HiYawUoLZSqaBizdUgGfoxVVi UAyLMlnCIUsUu1MdOOqfTA4864qiTZMWcWENk63C0cSj4bLkzwbuDCZtQ4KpX97VSq2W wYNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770159102; x=1770763902; h=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=trHHoM5lxs3R3c1XXOrfjjzTr20GXbuQCFUGYGyaPS8=; b=FfFtNEGxgwkVByxiIvG/uYLiXCMySOV1H6Kup9HwpfViUNFFMz8xQbyCmee6S1ygFQ OHz+dXztp7lrM+NzAkQd1clxIFfSoE4vm3LU/gi/1Iqb9Iyyu3+B5pvqDByxY8557UNr 4Lo/IzGS5bPQgl5a+DfnlhRSiYU0xyfC87Hmf4+f/JAPNEsfr7+VHz0L7yhkBmV+ZXny oeou9UfqCj83N0gM1cHoHfrWekACPqPmPRD0aMy08Bw8S4I1jr6DnekX4HnrcGxMkCgw 7yBPrywIrx3kX9PrnqGtnj5OFBsiWinPPLVeZFUA/mZjc8bsgcCUz7E2XWoxKrZ33O+F 84dg== X-Forwarded-Encrypted: i=1; AJvYcCUHexMkTU2ZJSf8rTnL78KFrge60ccqIlwRbErPU9UlxW3urFiR3IBfnDbTLSDt+TceQbiXkz3eMCJqqaA=@vger.kernel.org X-Gm-Message-State: AOJu0Yyh+HIXYg5APgICwx88Xx3xoe+UBAEp0lOS+qCwkv4oJoNXmRAM j3g9/Lt5yCBW+eyiBtirgbnitQmddR29QKxCoNUKypibmfx+Bkk5Pybf0strQvgmIXxAv19nkfR WAtam8c0uqw== X-Received: from dlbbt22.prod.google.com ([2002:a05:7022:996:b0:11b:d8a1:4048]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:4a1:b0:11b:1c6d:98bd with SMTP id a92af1059eb24-126f47822a3mr457703c88.9.1770159102548; Tue, 03 Feb 2026 14:51:42 -0800 (PST) Date: Tue, 3 Feb 2026 14:51:24 -0800 In-Reply-To: <20260203225129.4077140-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260203225129.4077140-1-irogers@google.com> X-Mailer: git-send-email 2.53.0.rc2.204.g2597b5adb4-goog Message-ID: <20260203225129.4077140-2-irogers@google.com> Subject: [PATCH v7 1/6] Revert "perf tool_pmu: More accurately set the cpus for tool events" From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , "Dr. David Alan Gilbert" , Yang Li , James Clark , Thomas Falcon , Thomas Richter , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Andi Kleen , Dapeng Mi , Andres Freund Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This reverts commit d8d8a0b3603a9a8fa207cf9e4f292e81dc5d1008. The setting of a user CPU map can cause an empty intersection when combined with CPU 0 and the event removed. This later triggers a segv in the stat-shadow logic. Let's put back a full online CPU map for now by reverting this patch. Reported-by: Andres Freund Closes: https://lore.kernel.org/linux-perf-users/cgja46br2smmznxs7kbeabs6zg= v3b4olfqgh2fdp5mxk2yom4v@w6jjgov6hdi6/ Signed-off-by: Ian Rogers --- tools/perf/util/parse-events.c | 9 ++------- tools/perf/util/tool_pmu.c | 19 ------------------- tools/perf/util/tool_pmu.h | 1 - 3 files changed, 2 insertions(+), 27 deletions(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index d4647ded340f..f631bf7a919f 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -30,7 +30,6 @@ #include "util/event.h" #include "util/bpf-filter.h" #include "util/stat.h" -#include "util/tool_pmu.h" #include "util/util.h" #include "tracepoint.h" #include @@ -230,12 +229,8 @@ __add_event(struct list_head *list, int *idx, if (pmu) { is_pmu_core =3D pmu->is_core; pmu_cpus =3D perf_cpu_map__get(pmu->cpus); - if (perf_cpu_map__is_empty(pmu_cpus)) { - if (perf_pmu__is_tool(pmu)) - pmu_cpus =3D tool_pmu__cpus(attr); - else - pmu_cpus =3D cpu_map__online(); - } + if (perf_cpu_map__is_empty(pmu_cpus)) + pmu_cpus =3D cpu_map__online(); } else { is_pmu_core =3D (attr->type =3D=3D PERF_TYPE_HARDWARE || attr->type =3D=3D PERF_TYPE_HW_CACHE); diff --git a/tools/perf/util/tool_pmu.c b/tools/perf/util/tool_pmu.c index 37c4eae0bef1..6a9df3dc0e07 100644 --- a/tools/perf/util/tool_pmu.c +++ b/tools/perf/util/tool_pmu.c @@ -2,7 +2,6 @@ #include "cgroup.h" #include "counts.h" #include "cputopo.h" -#include "debug.h" #include "evsel.h" #include "pmu.h" #include "print-events.h" @@ -14,7 +13,6 @@ #include #include #include -#include #include #include #include @@ -111,23 +109,6 @@ const char *evsel__tool_pmu_event_name(const struct ev= sel *evsel) return tool_pmu__event_to_str(evsel->core.attr.config); } =20 -struct perf_cpu_map *tool_pmu__cpus(struct perf_event_attr *attr) -{ - static struct perf_cpu_map *cpu0_map; - enum tool_pmu_event event =3D (enum tool_pmu_event)attr->config; - - if (event <=3D TOOL_PMU__EVENT_NONE || event >=3D TOOL_PMU__EVENT_MAX) { - pr_err("Invalid tool PMU event config %llx\n", attr->config); - return NULL; - } - if (event =3D=3D TOOL_PMU__EVENT_USER_TIME || event =3D=3D TOOL_PMU__EVEN= T_SYSTEM_TIME) - return cpu_map__online(); - - if (!cpu0_map) - cpu0_map =3D perf_cpu_map__new_int(0); - return perf_cpu_map__get(cpu0_map); -} - static bool read_until_char(struct io *io, char e) { int c; diff --git a/tools/perf/util/tool_pmu.h b/tools/perf/util/tool_pmu.h index ea343d1983d3..f1714001bc1d 100644 --- a/tools/perf/util/tool_pmu.h +++ b/tools/perf/util/tool_pmu.h @@ -46,7 +46,6 @@ bool tool_pmu__read_event(enum tool_pmu_event ev, u64 tool_pmu__cpu_slots_per_cycle(void); =20 bool perf_pmu__is_tool(const struct perf_pmu *pmu); -struct perf_cpu_map *tool_pmu__cpus(struct perf_event_attr *attr); =20 bool evsel__is_tool(const struct evsel *evsel); enum tool_pmu_event evsel__tool_event(const struct evsel *evsel); --=20 2.53.0.rc2.204.g2597b5adb4-goog