From: Ian Rogers <irogers@google.com>
To: "Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Arnaldo Carvalho de Melo" <acme@kernel.org>,
"Namhyung Kim" <namhyung@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
"Jiri Olsa" <jolsa@kernel.org>, "Ian Rogers" <irogers@google.com>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"James Clark" <james.clark@arm.com>,
"Athira Rajeev" <atrajeev@linux.vnet.ibm.com>,
"Colin Ian King" <colin.i.king@gmail.com>,
"Ahelenia Ziemiańska" <nabijaczleweli@nabijaczleweli.xyz>,
"Leo Yan" <leo.yan@linux.dev>, "Song Liu" <song@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Liam Howlett" <liam.howlett@oracle.com>,
"Ilkka Koskinen" <ilkka@os.amperecomputing.com>,
"Ben Gainey" <ben.gainey@arm.com>,
"K Prateek Nayak" <kprateek.nayak@amd.com>,
"Kan Liang" <kan.liang@linux.intel.com>,
"Yanteng Si" <siyanteng@loongson.cn>,
"Ravi Bangoria" <ravi.bangoria@amd.com>,
"Sun Haiyong" <sunhaiyong@loongson.cn>,
"Changbin Du" <changbin.du@huawei.com>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
zhaimingbing <zhaimingbing@cmss.chinamobile.com>,
"Paran Lee" <p4ranlee@gmail.com>, "Li Dong" <lidong@vivo.com>,
elfring@users.sourceforge.net, "Andi Kleen" <ak@linux.intel.com>,
"Markus Elfring" <Markus.Elfring@web.de>,
"Chengen Du" <chengen.du@canonical.com>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
bpf@vger.kernel.org
Subject: [PATCH v2 01/13] perf dso: Reorder variables to save space in struct dso
Date: Thu, 21 Mar 2024 09:02:48 -0700 [thread overview]
Message-ID: <20240321160300.1635121-2-irogers@google.com> (raw)
In-Reply-To: <20240321160300.1635121-1-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 2cdcd1e2ef8b..17dab230a2ca 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -161,66 +161,66 @@ 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[];
};
--
2.44.0.396.g6e790dbe36-goog
next prev parent reply other threads:[~2024-03-21 16:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-21 16:02 [PATCH v2 00/13] dso/dsos memory savings and clean up Ian Rogers
2024-03-21 16:02 ` Ian Rogers [this message]
2024-03-21 20:28 ` [PATCH v2 01/13] perf dso: Reorder variables to save space in struct dso Arnaldo Carvalho de Melo
2024-03-21 16:02 ` [PATCH v2 02/13] perf dsos: Attempt to better abstract dsos internals Ian Rogers
2024-03-21 16:02 ` [PATCH v2 03/13] perf dsos: Tidy reference counting and locking Ian Rogers
2024-03-21 16:02 ` [PATCH v2 04/13] perf dsos: Add dsos__for_each_dso Ian Rogers
2024-03-22 20:43 ` Namhyung Kim
2024-03-22 20:54 ` Namhyung Kim
2024-03-21 16:02 ` [PATCH v2 05/13] perf dso: Move dso functions out of dsos Ian Rogers
2024-03-21 16:02 ` [PATCH v2 06/13] perf dsos: Switch more loops to dsos__for_each_dso Ian Rogers
2024-03-21 16:02 ` [PATCH v2 07/13] perf dsos: Switch backing storage to array from rbtree/list Ian Rogers
2024-03-21 16:02 ` [PATCH v2 08/13] perf dsos: Remove __dsos__addnew Ian Rogers
2024-03-21 16:02 ` [PATCH v2 09/13] perf dsos: Remove __dsos__findnew_link_by_longname_id Ian Rogers
2024-03-21 16:02 ` [PATCH v2 10/13] perf dsos: Switch hand code to bsearch Ian Rogers
2024-03-21 16:02 ` [PATCH v2 11/13] perf dso: Add reference count checking and accessor functions Ian Rogers
2024-03-21 16:02 ` [PATCH v2 12/13] perf dso: Reference counting related fixes Ian Rogers
2024-03-25 17:22 ` Markus Elfring
2024-03-21 16:03 ` [PATCH v2 13/13] perf dso: Use container_of to avoid a pointer in dso_data Ian Rogers
2024-03-25 21:03 ` [PATCH v2 00/13] dso/dsos memory savings and clean up Namhyung Kim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240321160300.1635121-2-irogers@google.com \
--to=irogers@google.com \
--cc=Markus.Elfring@web.de \
--cc=acme@kernel.org \
--cc=adrian.hunter@intel.com \
--cc=ak@linux.intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=atrajeev@linux.vnet.ibm.com \
--cc=ben.gainey@arm.com \
--cc=bpf@vger.kernel.org \
--cc=changbin.du@huawei.com \
--cc=chengen.du@canonical.com \
--cc=colin.i.king@gmail.com \
--cc=elfring@users.sourceforge.net \
--cc=ilkka@os.amperecomputing.com \
--cc=james.clark@arm.com \
--cc=jolsa@kernel.org \
--cc=kan.liang@linux.intel.com \
--cc=kprateek.nayak@amd.com \
--cc=leo.yan@linux.dev \
--cc=liam.howlett@oracle.com \
--cc=lidong@vivo.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mhiramat@kernel.org \
--cc=mingo@redhat.com \
--cc=nabijaczleweli@nabijaczleweli.xyz \
--cc=namhyung@kernel.org \
--cc=ojeda@kernel.org \
--cc=p4ranlee@gmail.com \
--cc=peterz@infradead.org \
--cc=ravi.bangoria@amd.com \
--cc=siyanteng@loongson.cn \
--cc=song@kernel.org \
--cc=sunhaiyong@loongson.cn \
--cc=zhaimingbing@cmss.chinamobile.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.