From nobody Fri Dec 19 04:02:16 2025 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 705CFCDB46E for ; Thu, 12 Oct 2023 06:24:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377844AbjJLGYv (ORCPT ); Thu, 12 Oct 2023 02:24:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377511AbjJLGYo (ORCPT ); Thu, 12 Oct 2023 02:24:44 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C19C5121 for ; Wed, 11 Oct 2023 23:24:25 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5a7dac80595so10309457b3.0 for ; Wed, 11 Oct 2023 23:24:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1697091865; x=1697696665; darn=vger.kernel.org; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=lyUH9hPvlymkRvCiwSN/eO1tveUn9WvUsIn+qftqtUI=; b=Alk7tEDPHfTdgiMo+0PFgEDjLvWBrSK3IfWkl31fYSWOCG4akAVMrqufcIFG4/HVDN wgQmyElp5SPpQ6vjaT5WBoTe58dPdBPPeY7gJpyiiSYRXRJapxkf3PrL24MuP8zfL/nH SuRwrJmZuZzLNreab+8kXOhSLwRDdHW/z/wlRMJV+qNCMrLrf/OALRwOvtpXRSKbN2u/ vxVwSWDeuP477+YQKoH87k/lZfRx9PhCV9ZW6+26k4WOQ50vG0pqVVZZtlCCDzIGhSHR 5Evl2uuNii0wVWBlgieQ0sp7AZCF0/3PKDRdRDdCkKuPKU5o0nVtVDZfX1hghdzmz0XZ LiBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697091865; x=1697696665; h=to:from:subject:references:mime-version:message-id:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=lyUH9hPvlymkRvCiwSN/eO1tveUn9WvUsIn+qftqtUI=; b=f7VxbUmBcjhA8uS+JCHpFbC0slLjuBmloTd3Q+56/+i3TzSRQ2G/1phCa/tl1jcrqo IvpycnParuIObGcZ2HB70u5sdWcCh1EipLCZbVnreg9dsnc785kaTx820ax4uxNw4x3e OfBlZokjin1gM2i0ED/pbHfH4K20A02w32R2yEj6yLbe5DFXIF80/1V/SOpL1sd4Wg0/ 9XvB1wW89hnIe/jxrl+cXasUfVhtJneWTnUEKXxnap0MH3C1rvQTVsr1ygNuWTQhyhky rOpwI8lV/6KrCRHsT7Aop3iDR0Oq93YDUJjRZy8eUwQ6RdfF3XteE8uYW5zPKXMb85Oi FttQ== X-Gm-Message-State: AOJu0Yz0RmcEomlU7FTBpaevk4GoFXoCQXgd/FivxEL4O69wnmJNxdkX RoxBwId5dJdBADIP4VkJtgMCudGVKT25 X-Google-Smtp-Source: AGHT+IEH07HDyKE3C92uXlhnmTt2oGTYwu5Ra01CUAR3cqmzqaFcrTMzzdIvO3clx52whdoAvv4Md0oSmVlO X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:7be5:14d2:880b:c5c9]) (user=irogers job=sendgmr) by 2002:a81:b3c5:0:b0:59b:db15:498c with SMTP id r188-20020a81b3c5000000b0059bdb15498cmr505881ywh.10.1697091864943; Wed, 11 Oct 2023 23:24:24 -0700 (PDT) Date: Wed, 11 Oct 2023 23:23:54 -0700 In-Reply-To: <20231012062359.1616786-1-irogers@google.com> Message-Id: <20231012062359.1616786-9-irogers@google.com> Mime-Version: 1.0 References: <20231012062359.1616786-1-irogers@google.com> X-Mailer: git-send-email 2.42.0.609.gbb76f46606-goog Subject: [PATCH v2 08/13] perf callchain: Minor layout changes to callchain_list From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Adrian Hunter , Nick Terrell , Kan Liang , Song Liu , Sandipan Das , Anshuman Khandual , James Clark , Liam Howlett , Miguel Ojeda , Leo Yan , German Gomez , Ravi Bangoria , Artem Savkov , Athira Rajeev , Andi Kleen , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, bpf@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Avoid 6 byte hole for padding. Place more frequently used fields first in an attempt to use just 1 cacheline in the common case. Before: ``` struct callchain_list { u64 ip; /* 0 8 */ struct map_symbol ms; /* 8 24 */ struct { _Bool unfolded; /* 32 1 */ _Bool has_children; /* 33 1 */ }; /* 32 2 */ /* XXX 6 bytes hole, try to pack */ u64 branch_count; /* 40 8 */ u64 from_count; /* 48 8 */ u64 predicted_count; /* 56 8 */ /* --- cacheline 1 boundary (64 bytes) --- */ u64 abort_count; /* 64 8 */ u64 cycles_count; /* 72 8 */ u64 iter_count; /* 80 8 */ u64 iter_cycles; /* 88 8 */ struct branch_type_stat * brtype_stat; /* 96 8 */ const char * srcline; /* 104 8 */ struct list_head list; /* 112 16 */ /* size: 128, cachelines: 2, members: 13 */ /* sum members: 122, holes: 1, sum holes: 6 */ }; ``` After: ``` struct callchain_list { struct list_head list; /* 0 16 */ u64 ip; /* 16 8 */ struct map_symbol ms; /* 24 24 */ const char * srcline; /* 48 8 */ u64 branch_count; /* 56 8 */ /* --- cacheline 1 boundary (64 bytes) --- */ u64 from_count; /* 64 8 */ u64 cycles_count; /* 72 8 */ u64 iter_count; /* 80 8 */ u64 iter_cycles; /* 88 8 */ struct branch_type_stat * brtype_stat; /* 96 8 */ u64 predicted_count; /* 104 8 */ u64 abort_count; /* 112 8 */ struct { _Bool unfolded; /* 120 1 */ _Bool has_children; /* 121 1 */ }; /* 120 2 */ /* size: 128, cachelines: 2, members: 13 */ /* padding: 6 */ }; ``` Signed-off-by: Ian Rogers --- tools/perf/util/callchain.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h index 86e8a9e81456..d5c66345ae31 100644 --- a/tools/perf/util/callchain.h +++ b/tools/perf/util/callchain.h @@ -116,22 +116,22 @@ extern struct callchain_param callchain_param; extern struct callchain_param callchain_param_default; =20 struct callchain_list { + struct list_head list; u64 ip; struct map_symbol ms; - struct /* for TUI */ { - bool unfolded; - bool has_children; - }; + const char *srcline; u64 branch_count; u64 from_count; - u64 predicted_count; - u64 abort_count; u64 cycles_count; u64 iter_count; u64 iter_cycles; struct branch_type_stat *brtype_stat; - const char *srcline; - struct list_head list; + u64 predicted_count; + u64 abort_count; + struct /* for TUI */ { + bool unfolded; + bool has_children; + }; }; =20 /* --=20 2.42.0.609.gbb76f46606-goog