From: Ian Rogers <irogers@google.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Nick Terrell <terrelln@fb.com>,
Kan Liang <kan.liang@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>, Kajol Jain <kjain@linux.ibm.com>,
Athira Rajeev <atrajeev@linux.vnet.ibm.com>,
Huacai Chen <chenhuacai@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Vincent Whitchurch <vincent.whitchurch@axis.com>,
"Steinar H. Gunderson" <sesse@google.com>,
Liam Howlett <liam.howlett@oracle.com>,
Miguel Ojeda <ojeda@kernel.org>,
Colin Ian King <colin.i.king@gmail.com>,
Dmitrii Dolgov <9erthalion6@gmail.com>,
Yang Jihong <yangjihong1@huawei.com>,
Ming Wang <wangming01@loongson.cn>,
James Clark <james.clark@arm.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Sean Christopherson <seanjc@google.com>,
Leo Yan <leo.yan@linaro.org>,
Ravi Bangoria <ravi.bangoria@amd.com>,
German Gomez <german.gomez@arm.com>,
Changbin Du <changbin.du@huawei.com>,
Paolo Bonzini <pbonzini@redhat.com>, Li Dong <lidong@vivo.com>,
Sandipan Das <sandipan.das@amd.com>,
liuwenyu <liuwenyu7@huawei.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Subject: [PATCH v4 34/53] perf dso: Reorder variables to save space in struct dso
Date: Thu, 2 Nov 2023 10:57:16 -0700 [thread overview]
Message-ID: <20231102175735.2272696-35-irogers@google.com> (raw)
In-Reply-To: <20231102175735.2272696-1-irogers@google.com>
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 <irogers@google.com>
---
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 3759de8c2267..8bdc17d78b02 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -158,66 +158,66 @@ 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[];
};
--
2.42.0.869.gea05f2083d-goog
next prev parent reply other threads:[~2023-11-02 18:01 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-02 17:56 [PATCH v4 00/53] Improvements to memory use Ian Rogers
2023-11-02 17:56 ` [PATCH v4 01/53] perf comm: Use regular mutex Ian Rogers
2023-11-05 17:31 ` Namhyung Kim
2023-11-05 21:35 ` Ian Rogers
2023-11-06 3:58 ` Namhyung Kim
2023-11-27 18:59 ` Ian Rogers
2023-11-27 21:53 ` Arnaldo Carvalho de Melo
2023-11-28 0:48 ` Arnaldo Carvalho de Melo
2023-11-02 17:56 ` [PATCH v4 02/53] perf record: Lazy load kernel symbols Ian Rogers
2023-11-05 17:34 ` Namhyung Kim
2023-11-06 11:00 ` Adrian Hunter
2023-11-08 16:01 ` Arnaldo Carvalho de Melo
2023-11-02 17:56 ` [PATCH v4 03/53] libperf: Lazily allocate mmap event copy Ian Rogers
2023-11-03 8:32 ` Guilherme Amadio
2023-11-03 15:48 ` Ian Rogers
2023-11-05 18:12 ` Namhyung Kim
2023-11-27 19:28 ` Ian Rogers
2023-11-02 17:56 ` [PATCH v4 04/53] perf mmap: Lazily initialize zstd streams Ian Rogers
2023-11-27 22:00 ` Arnaldo Carvalho de Melo
2023-11-28 17:14 ` Arnaldo Carvalho de Melo
2023-11-28 17:38 ` Arnaldo Carvalho de Melo
2023-11-28 17:55 ` Ian Rogers
2023-11-28 20:29 ` Arnaldo Carvalho de Melo
2023-11-02 17:56 ` [PATCH v4 05/53] perf machine thread: Remove exited threads by default Ian Rogers
2023-11-06 11:28 ` Adrian Hunter
2023-11-08 16:04 ` Arnaldo Carvalho de Melo
2023-11-02 17:56 ` [PATCH v4 06/53] tools api fs: Switch filename__read_str to use io.h Ian Rogers
2023-11-06 3:53 ` Namhyung Kim
2023-11-27 20:26 ` Ian Rogers
2023-11-02 17:56 ` [PATCH v4 07/53] tools api fs: Avoid reading whole file for a 1 byte bool Ian Rogers
2023-11-06 3:55 ` Namhyung Kim
2023-11-27 20:41 ` Ian Rogers
2023-11-02 17:56 ` [PATCH v4 08/53] tools lib api: Add io_dir an allocation free readdir alternative Ian Rogers
2023-11-02 17:56 ` [PATCH v4 09/53] perf maps: Switch modules tree walk to io_dir__readdir Ian Rogers
2023-11-02 17:56 ` [PATCH v4 10/53] perf record: Be lazier in allocating lost samples buffer Ian Rogers
2023-11-27 22:03 ` Arnaldo Carvalho de Melo
2023-11-27 22:23 ` Ian Rogers
2023-11-02 17:56 ` [PATCH v4 11/53] perf pmu: Switch to io_dir__readdir Ian Rogers
2023-11-02 17:56 ` [PATCH v4 12/53] perf bpf: Don't synthesize BPF events when disabled Ian Rogers
2023-11-08 16:14 ` Arnaldo Carvalho de Melo
2023-11-08 23:03 ` Song Liu
2023-11-09 16:10 ` Arnaldo Carvalho de Melo
2023-11-02 17:56 ` [PATCH v4 13/53] perf header: Switch mem topology to io_dir__readdir Ian Rogers
2023-11-02 17:56 ` [PATCH v4 14/53] perf events: Remove scandir in thread synthesis Ian Rogers
2023-11-02 17:56 ` [PATCH v4 15/53] perf map: Simplify map_ip/unmap_ip and make map size smaller Ian Rogers
2023-11-02 17:56 ` [PATCH v4 16/53] perf maps: Move symbol maps functions to maps.c Ian Rogers
2023-11-02 17:56 ` [PATCH v4 17/53] perf thread: Add missing RC_CHK_EQUAL Ian Rogers
2023-11-02 17:57 ` [PATCH v4 18/53] perf maps: Add maps__for_each_map to call a function on each entry Ian Rogers
2023-11-02 17:57 ` [PATCH v4 19/53] perf maps: Add remove maps function to remove a map based on callback Ian Rogers
2023-11-02 17:57 ` [PATCH v4 20/53] perf debug: Expose debug file Ian Rogers
2023-11-02 17:57 ` [PATCH v4 21/53] perf maps: Refactor maps__fixup_overlappings Ian Rogers
2023-11-02 17:57 ` [PATCH v4 22/53] perf maps: Do simple merge if given map doesn't overlap Ian Rogers
2023-11-02 17:57 ` [PATCH v4 23/53] perf maps: Rename clone to copy from Ian Rogers
2023-11-02 17:57 ` [PATCH v4 24/53] perf maps: Add maps__load_first Ian Rogers
2023-11-02 17:57 ` [PATCH v4 25/53] perf maps: Add find next entry to give entry after the given map Ian Rogers
2023-11-02 17:57 ` [PATCH v4 26/53] perf maps: Reduce scope of map_rb_node and maps internals Ian Rogers
2023-11-02 17:57 ` [PATCH v4 27/53] perf maps: Fix up overlaps during fixup_end Ian Rogers
2023-11-02 17:57 ` [PATCH v4 28/53] perf maps: Switch from rbtree to lazily sorted array for addresses Ian Rogers
2023-11-02 17:57 ` [PATCH v4 29/53] perf maps: Get map before returning in maps__find Ian Rogers
2023-11-02 17:57 ` [PATCH v4 30/53] perf maps: Get map before returning in maps__find_by_name Ian Rogers
2023-11-02 17:57 ` [PATCH v4 31/53] perf maps: Get map before returning in maps__find_next_entry Ian Rogers
2023-11-02 17:57 ` [PATCH v4 32/53] perf maps: Hide maps internals Ian Rogers
2023-11-02 17:57 ` [PATCH v4 33/53] perf maps: Locking tidy up of nr_maps Ian Rogers
2023-11-02 17:57 ` Ian Rogers [this message]
2023-11-02 17:57 ` [PATCH v4 35/53] perf report: Sort child tasks by tid Ian Rogers
2023-11-02 17:57 ` [PATCH v4 36/53] perf trace: Ignore thread hashing in summary Ian Rogers
2023-11-02 17:57 ` [PATCH v4 37/53] perf machine: Move fprintf to for_each loop and a callback Ian Rogers
2023-11-02 17:57 ` [PATCH v4 38/53] perf threads: Move threads to its own files Ian Rogers
2023-11-02 17:57 ` [PATCH v4 39/53] perf threads: Switch from rbtree to hashmap Ian Rogers
2023-11-02 17:57 ` [PATCH v4 40/53] perf threads: Reduce table size from 256 to 8 Ian Rogers
2023-11-02 17:57 ` [PATCH v4 41/53] perf dsos: Attempt to better abstract dsos internals Ian Rogers
2023-11-02 17:57 ` [PATCH v4 42/53] perf dsos: Tidy reference counting and locking Ian Rogers
2023-11-02 17:57 ` [PATCH v4 43/53] perf dsos: Add dsos__for_each_dso Ian Rogers
2023-11-02 17:57 ` [PATCH v4 44/53] perf dso: Move dso functions out of dsos Ian Rogers
2023-11-02 17:57 ` [PATCH v4 45/53] perf dsos: Switch more loops to dsos__for_each_dso Ian Rogers
2023-11-02 17:57 ` [PATCH v4 46/53] perf dsos: Switch backing storage to array from rbtree/list Ian Rogers
2023-11-02 17:57 ` [PATCH v4 47/53] perf dsos: Remove __dsos__addnew Ian Rogers
2023-11-02 17:57 ` [PATCH v4 48/53] perf dsos: Remove __dsos__findnew_link_by_longname_id Ian Rogers
2023-11-02 17:57 ` [PATCH v4 49/53] perf dsos: Switch hand code to bsearch Ian Rogers
2023-11-02 17:57 ` [PATCH v4 50/53] perf dso: Add reference count checking and accessor functions Ian Rogers
2023-11-02 17:57 ` [PATCH v4 51/53] perf dso: Reference counting related fixes Ian Rogers
2023-11-02 17:57 ` [PATCH v4 52/53] perf dso: Use container_of to avoid a pointer in dso_data Ian Rogers
2023-11-02 17:57 ` [PATCH v4 53/53] perf env: Avoid recursively taking env->bpf_progs.lock Ian Rogers
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