From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 789391E5727 for ; Fri, 1 Nov 2024 21:18:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730495894; cv=none; b=iEn7XnRvMaZMINpWxGFXAr2plx/cJ9asniXSxO+izsDuMUaEBRItpbM/7kwUC0Ui1VW4MDdgO2OdNmi56oFEydW6cxL7KmRW30/SdpH8SBm0lAeMFG4GY5CLm+QjVtZTNgcZ9IWBGb2jZluddwHXHHoxEuFcOA+uzQJ8bJIVjZg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730495894; c=relaxed/simple; bh=AXaKmiz1BPQtO2iQli6F6rV4sK5t/IYfLGMeASUAz3s=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Ka00uDguZSkwt+Ym7oXECg9YV4v4tKdxKJH0lvT1uWFskteBffJtpmZYiKwBYKB9CrnVvbRrFF597z4rjYoCh0hBTc8RWYrRBw3Anawy9/+SG6grEPQarpja+UEgtbIR4zdshoVBtDKVM6RTPPBPvacKj6X7JZtJJVKk4+nlmDg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ctshao.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=WvWPXgHZ; arc=none smtp.client-ip=209.85.128.201 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--ctshao.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="WvWPXgHZ" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6e9ba43a9a0so37585487b3.3 for ; Fri, 01 Nov 2024 14:18:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1730495892; x=1731100692; 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=KFX7yvC3uxLOE0+Ihey450D1Cp+BaYpjbmXJpiztrUI=; b=WvWPXgHZ3Ptp0wIVorugku0quL5+fKPyHgOdcsyivfOk3vlB6BPVUPHDK0AWYLpNg6 77iyCqjjPO/wquA3JDBgfscbMTsN5cVIBXi5PTCJe5xKE151Sk5vbfDVRAKNHDc+z+AN VKjIuPUsodSw+YF9ZQ42qIg6Towjgp9YUFdOSm7lyIW4xPvf2pNKUuGROEN+NdKrSFyQ RZduOjhyAoDvsX+R0525zEjUPDAy7w+sHCTnYujRPl/AClvMDKa1jgW4oTh4+YewCpzf LypoX7eOM8+LKLmgy/wxX6PkvoX1UOe1Uv8fG0NuQe9/9aaPoUh2+TiKZMEfVRIasQnN v8fA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730495892; x=1731100692; 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=KFX7yvC3uxLOE0+Ihey450D1Cp+BaYpjbmXJpiztrUI=; b=ia59BcGlM+rscE3FYxwIzkS28Nd73qVVRSLuMy4fxMHJ/D3+FFUSdLgtTCQNptwWgZ vl5EA3sHeuaqe4ctLseiZvJImS7BKCYiHihe2mRRlXhQc2f4JQlOtet4BPKnu2gbAEaO 2775nprJtJim7a+ZheikQb5awD2xdPbck3fwKyq9Pgqix9sJJY3T7pnoOmSCxdB2l6mi UvVrDUO8GUBunaPT+gMmMtB3kHUez9hL8zY2KixIyXxvdrUAhjxWh4u03pnSYa0nN9b4 sln/92P6Cr9qxl1W2bTMB2PVaIrsYzYYvK6DocrTv9OYWE8CHvhfieA4tTF4APCWk1Pa WaKw== X-Gm-Message-State: AOJu0YxXqdxjJ9ThIQjtmWlkh03cYKeYhhj/zZlvlQqMnQdTsMGz6GJy qPpjTvgPW+T+p/czooSb9ktzj5NzdwZdsTSe32QiAfCR4/WeuRoI97poNE6MTuGRQjumhAVzlrR ZPRC4Iga0kn3XALBugTai/voA3fGl/DOwPiMoJB8TXPnOBvy4KFXy2b8xd19edpSfqmDtKCvyt/ hzOU1IQsBRty/WpyIAc0/6d9JrH8CaGTE9namU+s2m X-Google-Smtp-Source: AGHT+IFzp1ZkvjZarXFv7ndXQiRnJC0i3qabDPbnFkimDF8b30bYVnAD68cjpnIzcFlKFCf57DfDFgniUns= X-Received: from colette.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:ce7]) (user=ctshao job=sendgmr) by 2002:a25:b847:0:b0:e30:dfb5:8a8d with SMTP id 3f1490d57ef6-e30e5a03f2fmr4698276.2.1730495891733; Fri, 01 Nov 2024 14:18:11 -0700 (PDT) Date: Fri, 1 Nov 2024 21:17:56 +0000 In-Reply-To: <20241101211757.824743-1-ctshao@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241101211757.824743-1-ctshao@google.com> X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog Message-ID: <20241101211757.824743-2-ctshao@google.com> Subject: [PATCH v2 2/3] perf: Reveal PMU type in fdinfo From: Chun-Tse Shao To: linux-kernel@vger.kernel.org Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Liang Kan , Ze Gao , Chun-Tse Shao , Yang Jihong , Weilin Wang , linux-perf-users@vger.kernel.org Content-Type: text/plain; charset="UTF-8" It gives useful info on knowing which PMUs are reserved by this process. Also add extra attributes which would be useful. ``` Testing cycles $ ./perf stat -e cycles & $ cat /proc/`pidof perf`/fdinfo/3 pos: 0 flags: 02000002 mnt_id: 16 ino: 3081 perf_event-attr.type: 0 perf_event-attr.config: 0 perf_event-attr.config1: 0 perf_event-attr.config2: 0 perf_event-attr.config3: 0 Testing L1-dcache-load-misses// $ ./perf stat -e L1-dcache-load-misses & $ cat /proc/`pidof perf`/fdinfo/3 pos: 0 flags: 02000002 mnt_id: 16 ino: 1072 perf_event-attr.type: 3 perf_event-attr.config: 65536 perf_event-attr.config1: 0 perf_event-attr.config2: 0 perf_event-attr.config3: 0 ``` Signed-off-by: Chun-Tse Shao --- kernel/events/core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/kernel/events/core.c b/kernel/events/core.c index cdd09769e6c56..c950b6fc92cda 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -55,6 +55,7 @@ #include #include #include +#include #include "internal.h" @@ -6820,6 +6821,17 @@ static int perf_fasync(int fd, struct file *filp, int on) return 0; } +static void perf_show_fdinfo(struct seq_file *m, struct file *f) +{ + struct perf_event *event = f->private_data; + + seq_printf(m, "perf_event-attr.type:\t%u\n", event->orig_type); + seq_printf(m, "perf_event-attr.config:\t%llu\n", event->attr.config); + seq_printf(m, "perf_event-attr.config1:\t%llu\n", event->attr.config1); + seq_printf(m, "perf_event-attr.config2:\t%llu\n", event->attr.config2); + seq_printf(m, "perf_event-attr.config3:\t%llu\n", event->attr.config3); +} + static const struct file_operations perf_fops = { .release = perf_release, .read = perf_read, @@ -6828,6 +6840,7 @@ static const struct file_operations perf_fops = { .compat_ioctl = perf_compat_ioctl, .mmap = perf_mmap, .fasync = perf_fasync, + .show_fdinfo = perf_show_fdinfo, }; /* -- 2.47.0.163.g1226f6d8fa-goog