From mboxrd@z Thu Jan 1 00:00:00 1970 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 BDBA6C77B73 for ; Mon, 22 May 2023 11:31:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231493AbjEVLbV (ORCPT ); Mon, 22 May 2023 07:31:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232747AbjEVLbN (ORCPT ); Mon, 22 May 2023 07:31:13 -0400 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4555F9 for ; Mon, 22 May 2023 04:31:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684755060; x=1716291060; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=UbeQmBAHRioVJIl/LEdjqpc4KZUNiSUTMwnWy/W3vOw=; b=g3n1EfO43c5MXZZHKlNF0DeiwhkUWqVtZiIZpOxLCcGLmbGIZhKjTxuU hIUCRXms0PVhLj4W1odWc5DjTZ637eRLgY9oax/lJWQnta4pnoxW87Q4R NwkbEXU0i7Ho38TJWmEwNLP4K2+obc6RaBKD+RsDSCd4VbVSbm/7VGOde Jkcnv0Ym5x4RyQl4k+50FAjzrWMehndxYSZpXZipqAxtrsH8ngivYFuVE IXy1JGffL19bKg5ymop5RpwVXqSRGTkqYBthNSy8kyS9YDpPNHj5FkQjN ig/WC9IsllwSJfeZLXg6q3SXWyP1tdScThCKCSNLsipvXX0GY+wKMVaeO g==; X-IronPort-AV: E=McAfee;i="6600,9927,10717"; a="416356755" X-IronPort-AV: E=Sophos;i="6.00,184,1681196400"; d="scan'208";a="416356755" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 May 2023 04:31:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10717"; a="703468258" X-IronPort-AV: E=Sophos;i="6.00,184,1681196400"; d="scan'208";a="703468258" Received: from kanliang-dev.jf.intel.com ([10.165.154.102]) by orsmga002.jf.intel.com with ESMTP; 22 May 2023 04:30:59 -0700 From: kan.liang@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, linux-kernel@vger.kernel.org Cc: mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, irogers@google.com, adrian.hunter@intel.com, ak@linux.intel.com, eranian@google.com, alexey.v.bayduraev@linux.intel.com, tinghao.zhang@intel.com, Kan Liang Subject: [PATCH V2 3/6] perf: Support branch events Date: Mon, 22 May 2023 04:30:37 -0700 Message-Id: <20230522113040.2329924-3-kan.liang@linux.intel.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20230522113040.2329924-1-kan.liang@linux.intel.com> References: <20230522113040.2329924-1-kan.liang@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kan Liang With the cycle time information between branches, stalls can be easily observed. But it's difficult to explain what causes the long delay. Add a new branch sample type to indicate whether include occurrences of events in branch info. The information will be stored in the branch stack extension space. Reviewed-by: Andi Kleen Signed-off-by: Kan Liang --- Changes since V1: - Rename to PERF_SAMPLE_BRANCH_EVT_CNTRS - Drop the event ID sample type include/linux/perf_event.h | 4 ++++ include/uapi/linux/perf_event.h | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index e2e04dc39199..823c6779a96d 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -1137,6 +1137,10 @@ static inline bool branch_sample_priv(const struct perf_event *event) return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_PRIV_SAVE; } +static inline bool branch_sample_evt_cntrs(const struct perf_event *event) +{ + return event->attr.branch_sample_type & PERF_SAMPLE_BRANCH_EVT_CNTRS; +} struct perf_sample_data { /* diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index 1b3b90965b6b..3911cf000e8a 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -204,6 +204,8 @@ enum perf_branch_sample_type_shift { PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT = 18, /* save privilege mode */ + PERF_SAMPLE_BRANCH_EVT_CNTRS_SHIFT = 19, /* save occurrences of events on a branch */ + PERF_SAMPLE_BRANCH_MAX_SHIFT /* non-ABI */ }; @@ -235,6 +237,8 @@ enum perf_branch_sample_type { PERF_SAMPLE_BRANCH_PRIV_SAVE = 1U << PERF_SAMPLE_BRANCH_PRIV_SAVE_SHIFT, + PERF_SAMPLE_BRANCH_EVT_CNTRS = 1U << PERF_SAMPLE_BRANCH_EVT_CNTRS_SHIFT, + PERF_SAMPLE_BRANCH_MAX = 1U << PERF_SAMPLE_BRANCH_MAX_SHIFT, }; -- 2.35.1