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perf tools: Add perf pmu object to access pmu format definition

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Adding pmu object which provides interface to pmu's sysfs
event format definition located at:
  ${sysfs_mount}/bus/event_source/devices/${pmu}/format

Following interface is exported:
  struct perf_pmu* perf_pmu__find(char *name);
  - this function returns pmu object, which is then
    passed as a handle to other interface functions

  int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
                       struct list_head *head_terms);
  - this function configures perf_event_attr struct based
    on pmu's format definitions and config terms data,
    containined in head_terms list.

Parser generator is used to retrive the pmu's format definition.
The generated parser is part of the patch. Added makefile rule
'pmu-parser' to generate the parser code out of the bison/flex
sources.

Added builtin test 'Test perf pmu format parsing', which could
be run like:
	perf test pmu

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-errz96u1668gj9wlop1zhpht@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2012-03-15 20:09:17 +01:00 committed by Arnaldo Carvalho de Melo
parent 8f707d843c
commit cd82a32e99
10 changed files with 4541 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/Makefile
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@ -276,6 +276,7 @@ LIB_H += util/build-id.h
LIB_H += util/debug.h
LIB_H += util/debugfs.h
LIB_H += util/sysfs.h
LIB_H += util/pmu.h
LIB_H += util/event.h
LIB_H += util/evsel.h
LIB_H += util/evlist.h
@ -323,6 +324,7 @@ LIB_OBJS += $(OUTPUT)util/config.o
LIB_OBJS += $(OUTPUT)util/ctype.o
LIB_OBJS += $(OUTPUT)util/debugfs.o
LIB_OBJS += $(OUTPUT)util/sysfs.o
LIB_OBJS += $(OUTPUT)util/pmu.o
LIB_OBJS += $(OUTPUT)util/environment.o
LIB_OBJS += $(OUTPUT)util/event.o
LIB_OBJS += $(OUTPUT)util/evlist.o
@ -361,6 +363,8 @@ LIB_OBJS += $(OUTPUT)util/thread_map.o
LIB_OBJS += $(OUTPUT)util/trace-event-parse.o
LIB_OBJS += $(OUTPUT)util/parse-events-flex.o
LIB_OBJS += $(OUTPUT)util/parse-events-bison.o
LIB_OBJS += $(OUTPUT)util/pmu-flex.o
LIB_OBJS += $(OUTPUT)util/pmu-bison.o
LIB_OBJS += $(OUTPUT)util/trace-event-read.o
LIB_OBJS += $(OUTPUT)util/trace-event-info.o
LIB_OBJS += $(OUTPUT)util/trace-event-scripting.o
@ -773,6 +777,9 @@ $(OUTPUT)util/rbtree.o: ../../lib/rbtree.c $(OUTPUT)PERF-CFLAGS
$(OUTPUT)util/parse-events-flex.o: util/parse-events-flex.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -Wno-redundant-decls -Wno-switch-default -Wno-unused-function $<
$(OUTPUT)util/pmu-flex.o: util/pmu-flex.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -Wno-redundant-decls -Wno-switch-default -Wno-unused-function $<
$(OUTPUT)util/scripting-engines/trace-event-perl.o: util/scripting-engines/trace-event-perl.c $(OUTPUT)PERF-CFLAGS
$(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-unused-parameter -Wno-shadow $<
@ -810,6 +817,7 @@ help:
@echo ' info - make GNU info documentation (access with info <foo>)'
@echo ' pdf - make pdf documentation'
@echo ' event-parser - make event parser code'
@echo ' pmu-parser - make pmu format parser code'
@echo ' TAGS - use etags to make tag information for source browsing'
@echo ' tags - use ctags to make tag information for source browsing'
@echo ' cscope - use cscope to make interactive browsing database'
@ -863,6 +871,10 @@ event-parser:
$(QUIET_BISON)$(BISON) -v util/parse-events.y -d -o util/parse-events-bison.c
$(QUIET_FLEX)$(FLEX) --header-file=util/parse-events-flex.h -t util/parse-events.l > util/parse-events-flex.c
pmu-parser:
$(QUIET_BISON)$(BISON) -v util/pmu.y -d -o util/pmu-bison.c
$(QUIET_FLEX)$(FLEX) --header-file=util/pmu-flex.h -t util/pmu.l > util/pmu-flex.c
### Detect prefix changes
TRACK_CFLAGS = $(subst ','\'',$(ALL_CFLAGS)):\
$(bindir_SQ):$(perfexecdir_SQ):$(template_dir_SQ):$(prefix_SQ)

10
tools/perf/builtin-test.c
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@ -13,6 +13,7 @@
#include "util/parse-events.h"
#include "util/symbol.h"
#include "util/thread_map.h"
#include "util/pmu.h"
#include "../../include/linux/hw_breakpoint.h"
#include <sys/mman.h>
@ -1484,6 +1485,11 @@ static int test__rdpmc(void)
#endif
static int test__perf_pmu(void)
{
return perf_pmu__test();
}
static struct test {
const char *desc;
int (*func)(void);
@ -1518,6 +1524,10 @@ static struct test {
.desc = "Validate PERF_RECORD_* events & perf_sample fields",
.func = test__PERF_RECORD,
},
{
.desc = "Test perf pmu format parsing",
.func = test__perf_pmu,
},
{
.func = NULL,
},

1663
tools/perf/util/pmu-bison.c Normal file
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73
tools/perf/util/pmu-bison.h Normal file
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@ -0,0 +1,73 @@
/* A Bison parser, made by GNU Bison 2.4.3. */
/* Skeleton interface for Bison's Yacc-like parsers in C
Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
2009, 2010 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* As a special exception, you may create a larger work that contains
part or all of the Bison parser skeleton and distribute that work
under terms of your choice, so long as that work isn't itself a
parser generator using the skeleton or a modified version thereof
as a parser skeleton. Alternatively, if you modify or redistribute
the parser skeleton itself, you may (at your option) remove this
special exception, which will cause the skeleton and the resulting
Bison output files to be licensed under the GNU General Public
License without this special exception.
This special exception was added by the Free Software Foundation in
version 2.2 of Bison. */
/* Tokens. */
#ifndef YYTOKENTYPE
# define YYTOKENTYPE
/* Put the tokens into the symbol table, so that GDB and other debuggers
know about them. */
enum yytokentype {
PP_CONFIG = 258,
PP_CONFIG1 = 259,
PP_CONFIG2 = 260,
PP_VALUE = 261,
PP_ERROR = 262
};
#endif
#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
typedef union YYSTYPE
{
/* Line 1685 of yacc.c */
#line 31 "util/pmu.y"
unsigned long num;
DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
/* Line 1685 of yacc.c */
#line 65 "util/pmu-bison.h"
} YYSTYPE;
# define YYSTYPE_IS_TRIVIAL 1
# define yystype YYSTYPE /* obsolescent; will be withdrawn */
# define YYSTYPE_IS_DECLARED 1
#endif
extern YYSTYPE perf_pmu_lval;

1821
tools/perf/util/pmu-flex.c Normal file
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316
tools/perf/util/pmu-flex.h Normal file
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@ -0,0 +1,316 @@
#ifndef perf_pmu_HEADER_H
#define perf_pmu_HEADER_H 1
#define perf_pmu_IN_HEADER 1
#line 6 "util/pmu-flex.h"
#define YY_INT_ALIGNED short int
/* A lexical scanner generated by flex */
#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5
#define YY_FLEX_SUBMINOR_VERSION 35
#if YY_FLEX_SUBMINOR_VERSION > 0
#define FLEX_BETA
#endif
/* First, we deal with platform-specific or compiler-specific issues. */
/* begin standard C headers. */
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
/* end standard C headers. */
/* flex integer type definitions */
#ifndef FLEXINT_H
#define FLEXINT_H
/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
* if you want the limit (max/min) macros for int types.
*/
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif
#include <inttypes.h>
typedef int8_t flex_int8_t;
typedef uint8_t flex_uint8_t;
typedef int16_t flex_int16_t;
typedef uint16_t flex_uint16_t;
typedef int32_t flex_int32_t;
typedef uint32_t flex_uint32_t;
#else
typedef signed char flex_int8_t;
typedef short int flex_int16_t;
typedef int flex_int32_t;
typedef unsigned char flex_uint8_t;
typedef unsigned short int flex_uint16_t;
typedef unsigned int flex_uint32_t;
#endif /* ! C99 */
/* Limits of integral types. */
#ifndef INT8_MIN
#define INT8_MIN (-128)
#endif
#ifndef INT16_MIN
#define INT16_MIN (-32767-1)
#endif
#ifndef INT32_MIN
#define INT32_MIN (-2147483647-1)
#endif
#ifndef INT8_MAX
#define INT8_MAX (127)
#endif
#ifndef INT16_MAX
#define INT16_MAX (32767)
#endif
#ifndef INT32_MAX
#define INT32_MAX (2147483647)
#endif
#ifndef UINT8_MAX
#define UINT8_MAX (255U)
#endif
#ifndef UINT16_MAX
#define UINT16_MAX (65535U)
#endif
#ifndef UINT32_MAX
#define UINT32_MAX (4294967295U)
#endif
#endif /* ! FLEXINT_H */
#ifdef __cplusplus
/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST
#else /* ! __cplusplus */
/* C99 requires __STDC__ to be defined as 1. */
#if defined (__STDC__)
#define YY_USE_CONST
#endif /* defined (__STDC__) */
#endif /* ! __cplusplus */
#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#endif
/* Size of default input buffer. */
#ifndef YY_BUF_SIZE
#define YY_BUF_SIZE 16384
#endif
#ifndef YY_TYPEDEF_YY_BUFFER_STATE
#define YY_TYPEDEF_YY_BUFFER_STATE
typedef struct yy_buffer_state *YY_BUFFER_STATE;
#endif
extern int perf_pmu_leng;
extern FILE *perf_pmu_in, *perf_pmu_out;
#ifndef YY_TYPEDEF_YY_SIZE_T
#define YY_TYPEDEF_YY_SIZE_T
typedef size_t yy_size_t;
#endif
#ifndef YY_STRUCT_YY_BUFFER_STATE
#define YY_STRUCT_YY_BUFFER_STATE
struct yy_buffer_state
{
FILE *yy_input_file;
char *yy_ch_buf; /* input buffer */
char *yy_buf_pos; /* current position in input buffer */
/* Size of input buffer in bytes, not including room for EOB
* characters.
*/
yy_size_t yy_buf_size;
/* Number of characters read into yy_ch_buf, not including EOB
* characters.
*/
int yy_n_chars;
/* Whether we "own" the buffer - i.e., we know we created it,
* and can realloc() it to grow it, and should free() it to
* delete it.
*/
int yy_is_our_buffer;
/* Whether this is an "interactive" input source; if so, and
* if we're using stdio for input, then we want to use getc()
* instead of fread(), to make sure we stop fetching input after
* each newline.
*/
int yy_is_interactive;
/* Whether we're considered to be at the beginning of a line.
* If so, '^' rules will be active on the next match, otherwise
* not.
*/
int yy_at_bol;
int yy_bs_lineno; /**< The line count. */
int yy_bs_column; /**< The column count. */
/* Whether to try to fill the input buffer when we reach the
* end of it.
*/
int yy_fill_buffer;
int yy_buffer_status;
};
#endif /* !YY_STRUCT_YY_BUFFER_STATE */
void perf_pmu_restart (FILE *input_file );
void perf_pmu__switch_to_buffer (YY_BUFFER_STATE new_buffer );
YY_BUFFER_STATE perf_pmu__create_buffer (FILE *file,int size );
void perf_pmu__delete_buffer (YY_BUFFER_STATE b );
void perf_pmu__flush_buffer (YY_BUFFER_STATE b );
void perf_pmu_push_buffer_state (YY_BUFFER_STATE new_buffer );
void perf_pmu_pop_buffer_state (void );
YY_BUFFER_STATE perf_pmu__scan_buffer (char *base,yy_size_t size );
YY_BUFFER_STATE perf_pmu__scan_string (yyconst char *yy_str );
YY_BUFFER_STATE perf_pmu__scan_bytes (yyconst char *bytes,int len );
void *perf_pmu_alloc (yy_size_t );
void *perf_pmu_realloc (void *,yy_size_t );
void perf_pmu_free (void * );
/* Begin user sect3 */
extern int perf_pmu_lineno;
extern char *perf_pmu_text;
#define yytext_ptr perf_pmu_text
#ifdef YY_HEADER_EXPORT_START_CONDITIONS
#define INITIAL 0
#endif
#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
* down here because we want the user's section 1 to have been scanned first.
* The user has a chance to override it with an option.
*/
#include <unistd.h>
#endif
#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif
/* Accessor methods to globals.
These are made visible to non-reentrant scanners for convenience. */
int perf_pmu_lex_destroy (void );
int perf_pmu_get_debug (void );
void perf_pmu_set_debug (int debug_flag );
YY_EXTRA_TYPE perf_pmu_get_extra (void );
void perf_pmu_set_extra (YY_EXTRA_TYPE user_defined );
FILE *perf_pmu_get_in (void );
void perf_pmu_set_in (FILE * in_str );
FILE *perf_pmu_get_out (void );
void perf_pmu_set_out (FILE * out_str );
int perf_pmu_get_leng (void );
char *perf_pmu_get_text (void );
int perf_pmu_get_lineno (void );
void perf_pmu_set_lineno (int line_number );
/* Macros after this point can all be overridden by user definitions in
* section 1.
*/
#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int perf_pmu_wrap (void );
#else
extern int perf_pmu_wrap (void );
#endif
#endif
#ifndef yytext_ptr
static void yy_flex_strncpy (char *,yyconst char *,int );
#endif
#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * );
#endif
#ifndef YY_NO_INPUT
#endif
/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#define YY_READ_BUF_SIZE 8192
#endif
/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif
/* Default declaration of generated scanner - a define so the user can
* easily add parameters.
*/
#ifndef YY_DECL
#define YY_DECL_IS_OURS 1
extern int perf_pmu_lex (void);
#define YY_DECL int perf_pmu_lex (void)
#endif /* !YY_DECL */
/* yy_get_previous_state - get the state just before the EOB char was reached */
#undef YY_NEW_FILE
#undef YY_FLUSH_BUFFER
#undef yy_set_bol
#undef yy_new_buffer
#undef yy_set_interactive
#undef YY_DO_BEFORE_ACTION
#ifdef YY_DECL_IS_OURS
#undef YY_DECL_IS_OURS
#undef YY_DECL
#endif
#line 38 "util/pmu.l"
#line 315 "util/pmu-flex.h"
#undef perf_pmu_IN_HEADER
#endif /* perf_pmu_HEADER_H */

469
tools/perf/util/pmu.c Normal file
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@ -0,0 +1,469 @@
#include <linux/list.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include "sysfs.h"
#include "util.h"
#include "pmu.h"
#include "parse-events.h"
int perf_pmu_parse(struct list_head *list, char *name);
extern FILE *perf_pmu_in;
static LIST_HEAD(pmus);
/*
* Parse & process all the sysfs attributes located under
* the directory specified in 'dir' parameter.
*/
static int pmu_format_parse(char *dir, struct list_head *head)
{
struct dirent *evt_ent;
DIR *format_dir;
int ret = 0;
format_dir = opendir(dir);
if (!format_dir)
return -EINVAL;
while (!ret && (evt_ent = readdir(format_dir))) {
char path[PATH_MAX];
char *name = evt_ent->d_name;
FILE *file;
if (!strcmp(name, ".") || !strcmp(name, ".."))
continue;
snprintf(path, PATH_MAX, "%s/%s", dir, name);
ret = -EINVAL;
file = fopen(path, "r");
if (!file)
break;
perf_pmu_in = file;
ret = perf_pmu_parse(head, name);
fclose(file);
}
closedir(format_dir);
return ret;
}
/*
* Reading/parsing the default pmu format definition, which should be
* located at:
* /sys/bus/event_source/devices/<dev>/format as sysfs group attributes.
*/
static int pmu_format(char *name, struct list_head *format)
{
struct stat st;
char path[PATH_MAX];
const char *sysfs;
sysfs = sysfs_find_mountpoint();
if (!sysfs)
return -1;
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/format", sysfs, name);
if (stat(path, &st) < 0)
return -1;
if (pmu_format_parse(path, format))
return -1;
return 0;
}
/*
* Reading/parsing the default pmu type value, which should be
* located at:
* /sys/bus/event_source/devices/<dev>/type as sysfs attribute.
*/
static int pmu_type(char *name, __u32 *type)
{
struct stat st;
char path[PATH_MAX];
const char *sysfs;
FILE *file;
int ret = 0;
sysfs = sysfs_find_mountpoint();
if (!sysfs)
return -1;
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/type", sysfs, name);
if (stat(path, &st) < 0)
return -1;
file = fopen(path, "r");
if (!file)
return -EINVAL;
if (1 != fscanf(file, "%u", type))
ret = -1;
fclose(file);
return ret;
}
static struct perf_pmu *pmu_lookup(char *name)
{
struct perf_pmu *pmu;
LIST_HEAD(format);
__u32 type;
/*
* The pmu data we store & need consists of the pmu
* type value and format definitions. Load both right
* now.
*/
if (pmu_format(name, &format))
return NULL;
if (pmu_type(name, &type))
return NULL;
pmu = zalloc(sizeof(*pmu));
if (!pmu)
return NULL;
INIT_LIST_HEAD(&pmu->format);
list_splice(&format, &pmu->format);
pmu->name = strdup(name);
pmu->type = type;
return pmu;
}
static struct perf_pmu *pmu_find(char *name)
{
struct perf_pmu *pmu;
list_for_each_entry(pmu, &pmus, list)
if (!strcmp(pmu->name, name))
return pmu;
return NULL;
}
struct perf_pmu *perf_pmu__find(char *name)
{
struct perf_pmu *pmu;
/*
* Once PMU is loaded it stays in the list,
* so we keep us from multiple reading/parsing
* the pmu format definitions.
*/
pmu = pmu_find(name);
if (pmu)
return pmu;
return pmu_lookup(name);
}
static struct perf_pmu__format*
pmu_find_format(struct list_head *formats, char *name)
{
struct perf_pmu__format *format;
list_for_each_entry(format, formats, list)
if (!strcmp(format->name, name))
return format;
return NULL;
}
/*
* Returns value based on the format definition (format parameter)
* and unformated value (value parameter).
*
* TODO maybe optimize a little ;)
*/
static __u64 pmu_format_value(unsigned long *format, __u64 value)
{
unsigned long fbit, vbit;
__u64 v = 0;
for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
if (!test_bit(fbit, format))
continue;
if (!(value & (1llu << vbit++)))
continue;
v |= (1llu << fbit);
}
return v;
}
/*
* Setup one of config[12] attr members based on the
* user input data - temr parameter.
*/
static int pmu_config_term(struct list_head *formats,
struct perf_event_attr *attr,
struct parse_events__term *term)
{
struct perf_pmu__format *format;
__u64 *vp;
/*
* Support only for hardcoded and numnerial terms.
* Hardcoded terms should be already in, so nothing
* to be done for them.
*/
if (parse_events__is_hardcoded_term(term))
return 0;
if (term->type != PARSE_EVENTS__TERM_TYPE_NUM)
return -EINVAL;
format = pmu_find_format(formats, term->config);
if (!format)
return -EINVAL;
switch (format->value) {
case PERF_PMU_FORMAT_VALUE_CONFIG:
vp = &attr->config;
break;
case PERF_PMU_FORMAT_VALUE_CONFIG1:
vp = &attr->config1;
break;
case PERF_PMU_FORMAT_VALUE_CONFIG2:
vp = &attr->config2;
break;
default:
return -EINVAL;
}
*vp |= pmu_format_value(format->bits, term->val.num);
return 0;
}
static int pmu_config(struct list_head *formats, struct perf_event_attr *attr,
struct list_head *head_terms)
{
struct parse_events__term *term, *h;
list_for_each_entry_safe(term, h, head_terms, list)
if (pmu_config_term(formats, attr, term))
return -EINVAL;
return 0;
}
/*
* Configures event's 'attr' parameter based on the:
* 1) users input - specified in terms parameter
* 2) pmu format definitions - specified by pmu parameter
*/
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
struct list_head *head_terms)
{
attr->type = pmu->type;
return pmu_config(&pmu->format, attr, head_terms);
}
int perf_pmu__new_format(struct list_head *list, char *name,
int config, unsigned long *bits)
{
struct perf_pmu__format *format;
format = zalloc(sizeof(*format));
if (!format)
return -ENOMEM;
format->name = strdup(name);
format->value = config;
memcpy(format->bits, bits, sizeof(format->bits));
list_add_tail(&format->list, list);
return 0;
}
void perf_pmu__set_format(unsigned long *bits, long from, long to)
{
long b;
if (!to)
to = from;
memset(bits, 0, BITS_TO_LONGS(PERF_PMU_FORMAT_BITS));
for (b = from; b <= to; b++)
set_bit(b, bits);
}
/* Simulated format definitions. */
static struct test_format {
const char *name;
const char *value;
} test_formats[] = {
{ "krava01", "config:0-1,62-63\n", },
{ "krava02", "config:10-17\n", },
{ "krava03", "config:5\n", },
{ "krava11", "config1:0,2,4,6,8,20-28\n", },
{ "krava12", "config1:63\n", },
{ "krava13", "config1:45-47\n", },
{ "krava21", "config2:0-3,10-13,20-23,30-33,40-43,50-53,60-63\n", },
{ "krava22", "config2:8,18,48,58\n", },
{ "krava23", "config2:28-29,38\n", },
};
#define TEST_FORMATS_CNT (sizeof(test_formats) / sizeof(struct test_format))
/* Simulated users input. */
static struct parse_events__term test_terms[] = {
{
.config = (char *) "krava01",
.val.num = 15,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava02",
.val.num = 170,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava03",
.val.num = 1,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava11",
.val.num = 27,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava12",
.val.num = 1,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava13",
.val.num = 2,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava21",
.val.num = 119,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava22",
.val.num = 11,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava23",
.val.num = 2,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
};
#define TERMS_CNT (sizeof(test_terms) / sizeof(struct parse_events__term))
/*
* Prepare format directory data, exported by kernel
* at /sys/bus/event_source/devices/<dev>/format.
*/
static char *test_format_dir_get(void)
{
static char dir[PATH_MAX];
unsigned int i;
snprintf(dir, PATH_MAX, "/tmp/perf-pmu-test-format-XXXXXX");
if (!mkdtemp(dir))
return NULL;
for (i = 0; i < TEST_FORMATS_CNT; i++) {
static char name[PATH_MAX];
struct test_format *format = &test_formats[i];
FILE *file;
snprintf(name, PATH_MAX, "%s/%s", dir, format->name);
file = fopen(name, "w");
if (!file)
return NULL;
if (1 != fwrite(format->value, strlen(format->value), 1, file))
break;
fclose(file);
}
return dir;
}
/* Cleanup format directory. */
static int test_format_dir_put(char *dir)
{
char buf[PATH_MAX];
snprintf(buf, PATH_MAX, "rm -f %s/*\n", dir);
if (system(buf))
return -1;
snprintf(buf, PATH_MAX, "rmdir %s\n", dir);
return system(buf);
}
static struct list_head *test_terms_list(void)
{
static LIST_HEAD(terms);
unsigned int i;
for (i = 0; i < TERMS_CNT; i++)
list_add_tail(&test_terms[i].list, &terms);
return &terms;
}
#undef TERMS_CNT
int perf_pmu__test(void)
{
char *format = test_format_dir_get();
LIST_HEAD(formats);
struct list_head *terms = test_terms_list();
int ret;
if (!format)
return -EINVAL;
do {
struct perf_event_attr attr;
memset(&attr, 0, sizeof(attr));
ret = pmu_format_parse(format, &formats);
if (ret)
break;
ret = pmu_config(&formats, &attr, terms);
if (ret)
break;
ret = -EINVAL;
if (attr.config != 0xc00000000002a823)
break;
if (attr.config1 != 0x8000400000000145)
break;
if (attr.config2 != 0x0400000020041d07)
break;
ret = 0;
} while (0);
test_format_dir_put(format);
return ret;
}

41
tools/perf/util/pmu.h Normal file
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@ -0,0 +1,41 @@
#ifndef __PMU_H
#define __PMU_H
#include <linux/bitops.h>
#include "../../../include/linux/perf_event.h"
enum {
PERF_PMU_FORMAT_VALUE_CONFIG,
PERF_PMU_FORMAT_VALUE_CONFIG1,
PERF_PMU_FORMAT_VALUE_CONFIG2,
};
#define PERF_PMU_FORMAT_BITS 64
struct perf_pmu__format {
char *name;
int value;
DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
struct list_head list;
};
struct perf_pmu {
char *name;
__u32 type;
struct list_head format;
struct list_head list;
};
struct perf_pmu *perf_pmu__find(char *name);
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
struct list_head *head_terms);
int perf_pmu_wrap(void);
void perf_pmu_error(struct list_head *list, char *name, char const *msg);
int perf_pmu__new_format(struct list_head *list, char *name,
int config, unsigned long *bits);
void perf_pmu__set_format(unsigned long *bits, long from, long to);
int perf_pmu__test(void);
#endif /* __PMU_H */

43
tools/perf/util/pmu.l Normal file
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@ -0,0 +1,43 @@
%option prefix="perf_pmu_"
%{
#include <stdlib.h>
#include <linux/bitops.h>
#include "pmu.h"
#include "pmu-bison.h"
static int value(int base)
{
long num;
errno = 0;
num = strtoul(perf_pmu_text, NULL, base);
if (errno)
return PP_ERROR;
perf_pmu_lval.num = num;
return PP_VALUE;
}
%}
num_dec [0-9]+
%%
{num_dec} { return value(10); }
config { return PP_CONFIG; }
config1 { return PP_CONFIG1; }
config2 { return PP_CONFIG2; }
- { return '-'; }
: { return ':'; }
, { return ','; }
. { ; }
\n { ; }
%%
int perf_pmu_wrap(void)
{
return 1;
}

93
tools/perf/util/pmu.y Normal file
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@ -0,0 +1,93 @@
%name-prefix "perf_pmu_"
%parse-param {struct list_head *format}
%parse-param {char *name}
%{
#include <linux/compiler.h>
#include <linux/list.h>
#include <linux/bitmap.h>
#include <string.h>
#include "pmu.h"
extern int perf_pmu_lex (void);
#define ABORT_ON(val) \
do { \
if (val) \
YYABORT; \
} while (0)
%}
%token PP_CONFIG PP_CONFIG1 PP_CONFIG2
%token PP_VALUE PP_ERROR
%type <num> PP_VALUE
%type <bits> bit_term
%type <bits> bits
%union
{
unsigned long num;
DECLARE_BITMAP(bits, PERF_PMU_FORMAT_BITS);
}
%%
format:
format format_term
|
format_term
format_term:
PP_CONFIG ':' bits
{
ABORT_ON(perf_pmu__new_format(format, name,
PERF_PMU_FORMAT_VALUE_CONFIG,
$3));
}
|
PP_CONFIG1 ':' bits
{
ABORT_ON(perf_pmu__new_format(format, name,
PERF_PMU_FORMAT_VALUE_CONFIG1,
$3));
}
|
PP_CONFIG2 ':' bits
{
ABORT_ON(perf_pmu__new_format(format, name,
PERF_PMU_FORMAT_VALUE_CONFIG2,
$3));
}
bits:
bits ',' bit_term
{
bitmap_or($$, $1, $3, 64);
}
|
bit_term
{
memcpy($$, $1, sizeof($1));
}
bit_term:
PP_VALUE '-' PP_VALUE
{
perf_pmu__set_format($$, $1, $3);
}
|
PP_VALUE
{
perf_pmu__set_format($$, $1, 0);
}
%%
void perf_pmu_error(struct list_head *list __used,
char *name __used,
char const *msg __used)
{
}