From nobody Tue Dec 16 14:06:29 2025 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 3949729D265 for ; Sun, 5 Oct 2025 18:25:16 +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=1759688717; cv=none; b=Mfc9VIR3cyi8ExnhmCtdT0ApmhDxNI9CrSDGCRWALTKSUmNUrp3Rax/9BQ/Vlmvw2nqAXBgCiHVSr/gHsF186Df2de4+viMfRRO+8vrpMbIEfGyzUOFs2cTMVaJsA0p8n70wFy03HeqB4n3ym4irMF9MoPn3CO6BotZUOoxtDvI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759688717; c=relaxed/simple; bh=HLWlGuKKGsxbZ/VlexXCASHgD2Zqo2tv4jU6pHirNCU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=EYiqUllo98OpSkukY23NxDcsfRZXzfVD758OwDAySJcZkpYTDA5uVMuLYWHnnbHVqcw0gROCnOz4+KrX/93va69NMcoho1jqrZ1CaxcHJd7M9hLVWnk8od+/CChw9OfyKQYYAr5GW1xlzVO5qm/NXaoRWFSA2lnURKhOkL+ZdUE= 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=Cb1k0Uo0; 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="Cb1k0Uo0" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-269a2b255aaso84448335ad.3 for ; Sun, 05 Oct 2025 11:25:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1759688715; x=1760293515; 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=pGrB9wpoGRw4wb/VV8boqf4ZZbV8ujvZqQy8douNpFU=; b=Cb1k0Uo0It61gCSPdDMfP+80+oc9l/oFL8Z/yuHo3YwGYXQocWh0z3oXdmYh3LtHig uJTIBAZMoLwLRPcHcs1hoAaSApB4zQSfx0/UOcHAL7zjvRp/dJV+Hx56ARLLfrUG1xjc 247QLjg3B9JybhSxyDvF38p2F9VJEiaYXbe05tI8jdnNBbuwZAarEEvR4O+2obyk9KP6 /VaY05tH+4pvo4/9hlxUxNqlSNkCWWqWSoJ1ly3f7xMp5BLjXFn3Rn25blHRA+fTCjQ+ mDj2wgAB2+2UdzULR9QFuWguwBifei30ZnyynG1JumQZOYf2LUkn2NvmzB+CG5yKoGCi 2sFg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759688715; x=1760293515; 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=pGrB9wpoGRw4wb/VV8boqf4ZZbV8ujvZqQy8douNpFU=; b=YDsNBKiNxD5/PlZigLMc/GkVoCoCYPbVlnbzHdtyBTtmuAdl9cS7eMrpAJ/AQSiYLy YdGUl6XZ6QqlmhfjdDKePTH7TfaG3HJgNA8LImTUzzWnYrdLLfYxHlMF+Gs8il2HizHk Je3HQeaOtMV0fNp85LKBCVWgMMMAKknQ16G/oWhwmPLwOWz/TVI5hTau9AIQTmA2p5/o Ma+aOGRHoZJI29az/7/vnBBlUyoApCxclZQRMnuGtPMTuxX6JLJiRh8s15omcUrkkoVM PJpybYkmXkpWPXwmbNk4mK5iNjY/42QDXS6l0wCLWgCFq4fafi4UjOpjV4NI+oy0PVs9 BnAQ== X-Forwarded-Encrypted: i=1; AJvYcCV/wgIbYYHvV7LANMfZ6gFD3onnaPHD9zTgVm48A79su5JE1LIcGhCwkqNPMbpbx4RrZcWRTn400TvKK9k=@vger.kernel.org X-Gm-Message-State: AOJu0YzOBQU0HA3rV65guV+nq9rO05tpnfzKMZ2zGwVt/1MqIuWqyT+T 8iM2CYPVemPK3BdWXYmovfrt7cKK5h8pq2WWpAZm46hSVxxeKzOacYRF9XZ8reD0hGZQFedJuEk v6kcilUWWPw== X-Google-Smtp-Source: AGHT+IHuTTRLk6nyHFo3u33c5lPkL63Gcmyz1jzNBU2q5+TfJ2opM10Z3AmlL82Ky7TkElo3bLnq5800X+qZ X-Received: from plbkn4.prod.google.com ([2002:a17:903:784:b0:267:e964:bc69]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:3d07:b0:268:500:5ec7 with SMTP id d9443c01a7336-28e9a5b9441mr127956365ad.2.1759688715580; Sun, 05 Oct 2025 11:25:15 -0700 (PDT) Date: Sun, 5 Oct 2025 11:24:22 -0700 In-Reply-To: <20251005182430.2791371-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251005182430.2791371-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.618.g983fd99d29-goog Message-ID: <20251005182430.2791371-20-irogers@google.com> Subject: [PATCH v7 19/27] perf evlist: Avoid scanning all PMUs for evlist__new_default From: Ian Rogers To: James Clark , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Adrian Hunter , Xu Yang , Thomas Falcon , Andi Kleen , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Atish Patra , Beeman Strong , Leo Yan , Vince Weaver Cc: Ian Rogers Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Rather than wildcard matching the cycles event specify only the core PMUs. This avoids potentially loading unnecessary uncore PMUs. Signed-off-by: Ian Rogers --- tools/perf/util/evlist.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 80d8387e6b97..e8217efdda53 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -101,16 +101,24 @@ struct evlist *evlist__new_default(void) { struct evlist *evlist =3D evlist__new(); bool can_profile_kernel; - int err; + struct perf_pmu *pmu =3D NULL; =20 if (!evlist) return NULL; =20 can_profile_kernel =3D perf_event_paranoid_check(1); - err =3D parse_event(evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu"= ); - if (err) { - evlist__delete(evlist); - return NULL; + + while ((pmu =3D perf_pmus__scan_core(pmu)) !=3D NULL) { + char buf[256]; + int err; + + snprintf(buf, sizeof(buf), "%s/cycles/%s", pmu->name, + can_profile_kernel ? "P" : "Pu"); + err =3D parse_event(evlist, buf); + if (err) { + evlist__delete(evlist); + return NULL; + } } =20 if (evlist->core.nr_entries > 1) { --=20 2.51.0.618.g983fd99d29-goog