From nobody Thu Oct 2 04:47:03 2025 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (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 91B712C158B for ; Tue, 23 Sep 2025 04:19:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758601173; cv=none; b=S2hIrwtjJdR2Aonh15dC8G8HIGMusXmzJTjw0jWDbtwZJm6oq7GU41HOJB7osNt2WZ6N9ADC5fi7L1Dob7GkCmeo8JiU/FS8BYG618kxVDGLoPeCXRvWmvR+gG4hLQpnzD4AcX1K4PIGpAgUOZKo316Djh8WEOuG4rO7a24fNLc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758601173; c=relaxed/simple; bh=42iBM+j6OaHjeb87rjIgQvbVIu0m2YAxZp+bcUWwqIk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=TCPQ1MVtpa3sdYJSowNJLrfnFM99RIoPu8DooF3O6ua6DA3h9EQBbNNC23eglgVtVM1iE8tmp6itq4IutkyL//iAsyF4RBGgjwToS5Ijsrxoj+Mth4LX+YSTuHEY1uw9C/YHjR1ClEsDdx/03h1iekrT3DbCg9TfzJVb016O+iU= 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=hKvZoDtc; arc=none smtp.client-ip=209.85.210.201 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="hKvZoDtc" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-77f18d99ebaso2381292b3a.1 for ; Mon, 22 Sep 2025 21:19:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1758601170; x=1759205970; 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=RMlKXhObDH6+v/xxS2IL1R5qtxgnEu4dYtMPfrzR6FE=; b=hKvZoDtcdwBPAan5T2DrEj4d+X8aBKozt49vTB5XfjoYt2zvcuXegWnc9LuQ0t8JKn u1nDpUfC/1Jmc+gkhhxqzq8xZq2FOKWHTRDE5229D2Fb09puCIPtFER2xnZ1ajE07rxp lNvd10t8Lo+fFp8UbNsCFKaZJwGB9fQIu6hTxqOSaxlO19SMfUETs5p0IZV9KVMxP+wh 2AraBYn1XWjrN+2z4v7pQGS0qLXa2a4UMrjzPOlYxLGb5KZnDtuCEOFoz7HpPJF4c3Fg oz9rxJgQ97W0ufq/Utfc7qKyA1Kk1fCgN6P9KqUdlWTadOijIF/os1w1iKMrw3Fz9VYf QNSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758601170; x=1759205970; 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=RMlKXhObDH6+v/xxS2IL1R5qtxgnEu4dYtMPfrzR6FE=; b=mKW6x4dn1ckDRhUW+E4U67q8DcvQzkxJcXVARMN5bBUm4ekIzbaSJERqdzTgjh3EWE LGIAiGvG3wQX7si93Kgs6swEjcJ/ILI3IZle4/trdTq2wY9eAEE71QsVKTVTqEV+oPg4 37muF1lbqU1wgxuCDnvOkTQzyfrs4FqoLTA01JwxlvQM/WK56M+KKUXQzbxN4dSVFjEu GPQOLBE4fEs5XgDF3XLc8IEzEznFgOxDkOnV8Si7klASaPRQGIgKNWS5rx0B2heHq8HI xe2t/ArliDvh7QOGQh9RWw+gKCRxAZPuJOpH26ZRyPVspWtPPRNly1iIUFXgc3wNO82v zJCg== X-Forwarded-Encrypted: i=1; AJvYcCU87AfXAYcXC7BB/gPy5uyCEGsL02Vl2Rqptf/egOk3ifa6iZKZon0LSiQh+Lu6MKIrrBRq82K35cnGdvY=@vger.kernel.org X-Gm-Message-State: AOJu0YxFbYZPI/Iv1usic2Mn1ZvvHfHJvM2g9/ZVq7HZ8OtgwW460OqP OAdAl6TKb1243Uj4Wt6ScqWbUn/GUsf+9GtdLWniR/BYZLStYhZozxFConR/hdj1qjEw/9+9Q6x KTuW16As+ag== X-Google-Smtp-Source: AGHT+IF0UoFkxTH6FU00wEtyjymwn+KsC7TsbR+8Lhcdy4noVLIgU/fBCTXNE1X42uS8iAeiRcTzZy4xoEKs X-Received: from pjbsb16.prod.google.com ([2002:a17:90b:50d0:b0:323:25d2:22db]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:748e:b0:2b7:e136:1f30 with SMTP id adf61e73a8af0-2cff213742cmr1861087637.55.1758601169838; Mon, 22 Sep 2025 21:19:29 -0700 (PDT) Date: Mon, 22 Sep 2025 21:18:38 -0700 In-Reply-To: <20250923041844.400164-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250923041844.400164-1-irogers@google.com> X-Mailer: git-send-email 2.51.0.534.gc79095c0ca-goog Message-ID: <20250923041844.400164-20-irogers@google.com> Subject: [PATCH v5 19/25] perf evlist: Avoid scanning all PMUs for evlist__new_default From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , James Clark , Xu Yang , Thomas Falcon , Andi Kleen , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, bpf@vger.kernel.org, Atish Patra , Beeman Strong , Leo Yan , Vince Weaver 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 2.51.0.534.gc79095c0ca-goog