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 666D778B43 for ; Mon, 4 Mar 2024 18:35:43 +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=1709577345; cv=none; b=immyI2NuEGyPhvlg4WIQ+k10zRxNfzBFmcmJuAI7ljn5Tbb3t7OjxPZ66857iUOS/5+NaPoULdmk8pQVUsH/dY1fP+R0xm5gUGVCBy3Pm4Vbeh0M2rkc3bgMiOYc/q1IZR7Dp+XiaWdkS8YAyTh7VGt7/CPMexuK5Sni3PZoBjY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709577345; c=relaxed/simple; bh=EerS0aAV3+7Bri8KAscUSqt3fHGIjNsyBB2o18DOoMg=; h=Date:In-Reply-To:Message-Id:Mime-Version:References:Subject:From: To:Content-Type; b=MjM03y3lWKByogSZlyEhjsbSPlLNK7bBDiy+Z+KIw0GZdfPxNRK/jpSDFM8ad6rzYNOa9vjzZVlFVuVFAeWOhI6Ijcv0cOJ57iq8k2GnAnO5egCV/6CxY20q+NOt4M4ZHfx6b25JkmdiCT0IJMVNIr96XsooE3m1wNUNACWffc0= 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=iTvF29J7; 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--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="iTvF29J7" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-5ee22efe5eeso72905547b3.3 for ; Mon, 04 Mar 2024 10:35:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1709577342; x=1710182142; 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=Cx5F0TPYoFyHyhcCb321oaTpHv93eTJq+T09wAhUYAA=; b=iTvF29J7i69QhurxC/PdKYEcziPjgyismx/yhVPIXiSc/Xssd0tVKHxgRLeO9+uLNy Rgp1+0p3cs2+qeHZFDowvjhrZqvWOer4/yS4E+JSpV24cp9VItCNlBqQHONKVAYfZ6Tt tEktuz3fgbFfBYzmCG1RLaTkWclAUZsxTeEybnrbajMkZqrHxriFxPSg1ev/kbdcFLSx Hi8SJ+Vll687qHsEqmwrT0WaN86uQnQe7qvgAcfQxom7z3SribWkDtFmdID/3Sm+3xRP kgKXw8jTWHpEP1HK9C0XHOl5j5ebnPbMRERQlpPSCQqLzteAIzLTK2liXivC/FLHlzp7 Ry5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1709577342; x=1710182142; 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=Cx5F0TPYoFyHyhcCb321oaTpHv93eTJq+T09wAhUYAA=; b=oa+7205UvG0eTLZpVMCMrJaifqo56UPzRPPOamqev753TrrSvuhCJSgydklg8R8rmM p2aCqso7uOw8tk+8gP8w3kB7SG6+inExlYQkr5QG0bFpkQqbbYJMWRNRoKX954FW7mjs M2V4zczfupszdTQ1Rd56RXows8Sg4SPTwAtEH9mUBVLhOHs2AkExUKE5dJw2874MwWAX QuJfTjJ7ivZeQmBWhWu6AmGtM5v71QN1km8q9+uJ6B1FTIEdyT5GDcOYOAD0YJ4auzbC uVhtlQXmaPuG1FOh8L9zm+VnMm3iRwJYQbZm13NsF8BQAWGBbhyuDUBB5LlUVIu/2OCk DtzQ== X-Forwarded-Encrypted: i=1; AJvYcCUrB+BD+1A7pXQYsvR3PRkVCDJs2/nndyWOeswLJsegty3Gh7YrZPCsCk7g5YAMndm2jv9PJojaB4aUUO+D7esgGTynSWjEAa9PX91d X-Gm-Message-State: AOJu0Yz5wXPFHoQ5tbuXLsjimyGbaXmLz5QN3I8xizQsBaFMwXLQDCtb STV5RKlXuxM3lz6uzEhzstVey0U4bkM1jEVIDyr+YFC/6HoW0iM/w3Enw9ozZxE3+Q9UhKBngpf FYmUKdg== X-Google-Smtp-Source: AGHT+IENg0ScbVvNtSL3wgvqD6TxalUWm25qWayh3JbmNPIUBultu6yTa8XEr3HJ6Wo/tIp78B0rTJ3Kak/r X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:38b7:9cbf:f246:dafb]) (user=irogers job=sendgmr) by 2002:a81:9a05:0:b0:608:2ad5:cd28 with SMTP id r5-20020a819a05000000b006082ad5cd28mr2067486ywg.4.1709577342455; Mon, 04 Mar 2024 10:35:42 -0800 (PST) Date: Mon, 4 Mar 2024 10:35:12 -0800 In-Reply-To: <20240304183525.3222581-1-irogers@google.com> Message-Id: <20240304183525.3222581-2-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240304183525.3222581-1-irogers@google.com> X-Mailer: git-send-email 2.44.0.278.ge034bb2e1d-goog Subject: [PATCH v1 01/13] perf dso: Reorder variables to save space in struct dso From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Athira Rajeev , Colin Ian King , "=?UTF-8?q?Ahelenia=20Ziemia=C5=84ska?=" , Leo Yan , Song Liu , Miguel Ojeda , Liam Howlett , Ilkka Koskinen , Ben Gainey , K Prateek Nayak , Kan Liang , German Gomez , Sun Haiyong , Changbin Du , Masami Hiramatsu , zhaimingbing , Paran Lee , Li Dong , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Save 40 bytes and move from 8 to 7 cache lines. Make variable dwfl dependent on being a powerpc build. Squeeze bits of int/enum types when appropriate. Remove holes/padding by reordering variables. Before: ``` struct dso { struct mutex lock; /* 0 40 */ struct list_head node; /* 40 16 */ struct rb_node rb_node __attribute__((__aligned__(8))); /* 56 24 */ /* --- cacheline 1 boundary (64 bytes) was 16 bytes ago --- */ struct rb_root * root; /* 80 8 */ struct rb_root_cached symbols; /* 88 16 */ struct symbol * * symbol_names; /* 104 8 */ size_t symbol_names_len; /* 112 8 */ struct rb_root_cached inlined_nodes; /* 120 16 */ /* --- cacheline 2 boundary (128 bytes) was 8 bytes ago --- */ struct rb_root_cached srclines; /* 136 16 */ struct { u64 addr; /* 152 8 */ struct symbol * symbol; /* 160 8 */ } last_find_result; /* 152 16 */ void * a2l; /* 168 8 */ char * symsrc_filename; /* 176 8 */ unsigned int a2l_fails; /* 184 4 */ enum dso_space_type kernel; /* 188 4 */ /* --- cacheline 3 boundary (192 bytes) --- */ _Bool is_kmod; /* 192 1 */ /* XXX 3 bytes hole, try to pack */ enum dso_swap_type needs_swap; /* 196 4 */ enum dso_binary_type symtab_type; /* 200 4 */ enum dso_binary_type binary_type; /* 204 4 */ enum dso_load_errno load_errno; /* 208 4 */ u8 adjust_symbols:1; /* 212: 0 1 */ u8 has_build_id:1; /* 212: 1 1 */ u8 header_build_id:1; /* 212: 2 1 */ u8 has_srcline:1; /* 212: 3 1 */ u8 hit:1; /* 212: 4 1 */ u8 annotate_warned:1; /* 212: 5 1 */ u8 auxtrace_warned:1; /* 212: 6 1 */ u8 short_name_allocated:1; /* 212: 7 1 */ u8 long_name_allocated:1; /* 213: 0 1 */ u8 is_64_bit:1; /* 213: 1 1 */ /* XXX 6 bits hole, try to pack */ _Bool sorted_by_name; /* 214 1 */ _Bool loaded; /* 215 1 */ u8 rel; /* 216 1 */ /* XXX 7 bytes hole, try to pack */ struct build_id bid; /* 224 32 */ /* --- cacheline 4 boundary (256 bytes) --- */ u64 text_offset; /* 256 8 */ u64 text_end; /* 264 8 */ const char * short_name; /* 272 8 */ const char * long_name; /* 280 8 */ u16 long_name_len; /* 288 2 */ u16 short_name_len; /* 290 2 */ /* XXX 4 bytes hole, try to pack */ void * dwfl; /* 296 8 */ struct auxtrace_cache * auxtrace_cache; /* 304 8 */ int comp; /* 312 4 */ /* XXX 4 bytes hole, try to pack */ /* --- cacheline 5 boundary (320 bytes) --- */ struct { struct rb_root cache; /* 320 8 */ int fd; /* 328 4 */ int status; /* 332 4 */ u32 status_seen; /* 336 4 */ /* XXX 4 bytes hole, try to pack */ u64 file_size; /* 344 8 */ struct list_head open_entry; /* 352 16 */ u64 elf_base_addr; /* 368 8 */ u64 debug_frame_offset; /* 376 8 */ /* --- cacheline 6 boundary (384 bytes) --- */ u64 eh_frame_hdr_addr; /* 384 8 */ u64 eh_frame_hdr_offset; /* 392 8 */ } data; /* 320 80 */ struct { u32 id; /* 400 4 */ u32 sub_id; /* 404 4 */ struct perf_env * env; /* 408 8 */ } bpf_prog; /* 400 16 */ union { void * priv; /* 416 8 */ u64 db_id; /* 416 8 */ }; /* 416 8 */ struct nsinfo * nsinfo; /* 424 8 */ struct dso_id id; /* 432 24 */ /* --- cacheline 7 boundary (448 bytes) was 8 bytes ago --- */ refcount_t refcnt; /* 456 4 */ char name[]; /* 460 0 */ /* size: 464, cachelines: 8, members: 49 */ /* sum members: 440, holes: 4, sum holes: 18 */ /* sum bitfield members: 10 bits, bit holes: 1, sum bit holes: 6 bits */ /* padding: 4 */ /* forced alignments: 1 */ /* last cacheline: 16 bytes */ } __attribute__((__aligned__(8))); ``` After: ``` struct dso { struct mutex lock; /* 0 40 */ struct list_head node; /* 40 16 */ struct rb_node rb_node __attribute__((__aligned__(8))); /* 56 24 */ /* --- cacheline 1 boundary (64 bytes) was 16 bytes ago --- */ struct rb_root * root; /* 80 8 */ struct rb_root_cached symbols; /* 88 16 */ struct symbol * * symbol_names; /* 104 8 */ size_t symbol_names_len; /* 112 8 */ struct rb_root_cached inlined_nodes; /* 120 16 */ /* --- cacheline 2 boundary (128 bytes) was 8 bytes ago --- */ struct rb_root_cached srclines; /* 136 16 */ struct { u64 addr; /* 152 8 */ struct symbol * symbol; /* 160 8 */ } last_find_result; /* 152 16 */ struct build_id bid; /* 168 32 */ /* --- cacheline 3 boundary (192 bytes) was 8 bytes ago --- */ u64 text_offset; /* 200 8 */ u64 text_end; /* 208 8 */ const char * short_name; /* 216 8 */ const char * long_name; /* 224 8 */ void * a2l; /* 232 8 */ char * symsrc_filename; /* 240 8 */ struct nsinfo * nsinfo; /* 248 8 */ /* --- cacheline 4 boundary (256 bytes) --- */ struct auxtrace_cache * auxtrace_cache; /* 256 8 */ union { void * priv; /* 264 8 */ u64 db_id; /* 264 8 */ }; /* 264 8 */ struct { struct perf_env * env; /* 272 8 */ u32 id; /* 280 4 */ u32 sub_id; /* 284 4 */ } bpf_prog; /* 272 16 */ struct { struct rb_root cache; /* 288 8 */ struct list_head open_entry; /* 296 16 */ u64 file_size; /* 312 8 */ /* --- cacheline 5 boundary (320 bytes) --- */ u64 elf_base_addr; /* 320 8 */ u64 debug_frame_offset; /* 328 8 */ u64 eh_frame_hdr_addr; /* 336 8 */ u64 eh_frame_hdr_offset; /* 344 8 */ int fd; /* 352 4 */ int status; /* 356 4 */ u32 status_seen; /* 360 4 */ } data; /* 288 80 */ /* XXX last struct has 4 bytes of padding */ struct dso_id id; /* 368 24 */ /* --- cacheline 6 boundary (384 bytes) was 8 bytes ago --- */ unsigned int a2l_fails; /* 392 4 */ int comp; /* 396 4 */ refcount_t refcnt; /* 400 4 */ enum dso_load_errno load_errno; /* 404 4 */ u16 long_name_len; /* 408 2 */ u16 short_name_len; /* 410 2 */ enum dso_binary_type symtab_type:8; /* 412: 0 4 */ enum dso_binary_type binary_type:8; /* 412: 8 4 */ enum dso_space_type kernel:2; /* 412:16 4 */ enum dso_swap_type needs_swap:2; /* 412:18 4 */ /* Bitfield combined with next fields */ _Bool is_kmod:1; /* 414: 4 1 */ u8 adjust_symbols:1; /* 414: 5 1 */ u8 has_build_id:1; /* 414: 6 1 */ u8 header_build_id:1; /* 414: 7 1 */ u8 has_srcline:1; /* 415: 0 1 */ u8 hit:1; /* 415: 1 1 */ u8 annotate_warned:1; /* 415: 2 1 */ u8 auxtrace_warned:1; /* 415: 3 1 */ u8 short_name_allocated:1; /* 415: 4 1 */ u8 long_name_allocated:1; /* 415: 5 1 */ u8 is_64_bit:1; /* 415: 6 1 */ /* XXX 1 bit hole, try to pack */ _Bool sorted_by_name; /* 416 1 */ _Bool loaded; /* 417 1 */ u8 rel; /* 418 1 */ char name[]; /* 419 0 */ /* size: 424, cachelines: 7, members: 48 */ /* sum members: 415 */ /* sum bitfield members: 31 bits, bit holes: 1, sum bit holes: 1 bits */ /* padding: 5 */ /* paddings: 1, sum paddings: 4 */ /* forced alignments: 1 */ /* last cacheline: 40 bytes */ } __attribute__((__aligned__(8))); ``` Signed-off-by: Ian Rogers --- tools/perf/util/dso.h | 84 +++++++++++++++++++++---------------------- 1 file changed, 42 insertions(+), 42 deletions(-) diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index ce9f3849a773..33a41bcea335 100644 --- a/tools/perf/util/dso.h +++ b/tools/perf/util/dso.h @@ -160,66 +160,66 @@ struct dso { u64 addr; struct symbol *symbol; } last_find_result; - void *a2l; - char *symsrc_filename; - unsigned int a2l_fails; - enum dso_space_type kernel; - bool is_kmod; - enum dso_swap_type needs_swap; - enum dso_binary_type symtab_type; - enum dso_binary_type binary_type; - enum dso_load_errno load_errno; - u8 adjust_symbols:1; - u8 has_build_id:1; - u8 header_build_id:1; - u8 has_srcline:1; - u8 hit:1; - u8 annotate_warned:1; - u8 auxtrace_warned:1; - u8 short_name_allocated:1; - u8 long_name_allocated:1; - u8 is_64_bit:1; - bool sorted_by_name; - bool loaded; - u8 rel; struct build_id bid; u64 text_offset; u64 text_end; const char *short_name; const char *long_name; - u16 long_name_len; - u16 short_name_len; + void *a2l; + char *symsrc_filename; +#if defined(__powerpc__) void *dwfl; /* DWARF debug info */ +#endif + struct nsinfo *nsinfo; struct auxtrace_cache *auxtrace_cache; - int comp; - + union { /* Tool specific area */ + void *priv; + u64 db_id; + }; + /* bpf prog information */ + struct { + struct perf_env *env; + u32 id; + u32 sub_id; + } bpf_prog; /* dso data file */ struct { struct rb_root cache; - int fd; - int status; - u32 status_seen; - u64 file_size; struct list_head open_entry; + u64 file_size; u64 elf_base_addr; u64 debug_frame_offset; u64 eh_frame_hdr_addr; u64 eh_frame_hdr_offset; + int fd; + int status; + u32 status_seen; } data; - /* bpf prog information */ - struct { - u32 id; - u32 sub_id; - struct perf_env *env; - } bpf_prog; - - union { /* Tool specific area */ - void *priv; - u64 db_id; - }; - struct nsinfo *nsinfo; struct dso_id id; + unsigned int a2l_fails; + int comp; refcount_t refcnt; + enum dso_load_errno load_errno; + u16 long_name_len; + u16 short_name_len; + enum dso_binary_type symtab_type:8; + enum dso_binary_type binary_type:8; + enum dso_space_type kernel:2; + enum dso_swap_type needs_swap:2; + bool is_kmod:1; + u8 adjust_symbols:1; + u8 has_build_id:1; + u8 header_build_id:1; + u8 has_srcline:1; + u8 hit:1; + u8 annotate_warned:1; + u8 auxtrace_warned:1; + u8 short_name_allocated:1; + u8 long_name_allocated:1; + u8 is_64_bit:1; + bool sorted_by_name; + bool loaded; + u8 rel; char name[]; }; -- 2.44.0.278.ge034bb2e1d-goog