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perf/tool: Make the event parser re-entrant 

Make the event parser reentrant by creating separate
scanner for each parsing. The scanner is passed to the bison
as and argument to the lexer.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
[ Cleaned up the patch. ]
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1339741902-8449-11-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Zheng Yan 2012-06-15 14:31:39 +08:00 committed by Ingo Molnar
parent 46010ab260
commit ac20de6fff
4 changed files with 100 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
tools/perf/util/parse-events.c
View File

@ -11,6 +11,7 @@
#include "cache.h"
#include "header.h"
#include "debugfs.h"
#include "parse-events-bison.h"
#include "parse-events-flex.h"
#include "pmu.h"
@ -26,7 +27,7 @@ struct event_symbol {
#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
int parse_events_parse(void *data);
int parse_events_parse(void *data, void *scanner);
#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
@ -787,26 +788,38 @@ int parse_events_modifier(struct list_head *list, char *str)
return 0;
}
static int parse_events__scanner(const char *str, void *data)
{
YY_BUFFER_STATE buffer;
void *scanner;
int ret;
ret = parse_events_lex_init(&scanner);
if (ret)
return ret;
buffer = parse_events__scan_string(str, scanner);
#ifdef PARSER_DEBUG
parse_events_debug = 1;
#endif
ret = parse_events_parse(data, scanner);
parse_events__flush_buffer(buffer, scanner);
parse_events__delete_buffer(buffer, scanner);
parse_events_lex_destroy(scanner);
return ret;
}
int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
{
struct parse_events_data__events data = {
.list = LIST_HEAD_INIT(data.list),
.idx = evlist->nr_entries,
};
YY_BUFFER_STATE buffer;
int ret;
buffer = parse_events__scan_string(str);
#ifdef PARSER_DEBUG
parse_events_debug = 1;
#endif
ret = parse_events_parse(&data);
parse_events__flush_buffer(buffer);
parse_events__delete_buffer(buffer);
parse_events_lex_destroy();
ret = parse_events__scanner(str, &data);
if (!ret) {
int entries = data.idx - evlist->nr_entries;
perf_evlist__splice_list_tail(evlist, &data.list, entries);

2
tools/perf/util/parse-events.h
View File

@ -88,7 +88,7 @@ int parse_events_add_pmu(struct list_head **list, int *idx,
char *pmu , struct list_head *head_config);
void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all);
void parse_events_error(void *data, char const *msg);
void parse_events_error(void *data, void *scanner, char const *msg);
int parse_events__test(void);
void print_events(const char *event_glob);

116
tools/perf/util/parse-events.l
View File

@ -1,4 +1,6 @@
%option reentrant
%option bison-bridge
%option prefix="parse_events_"
%option stack
@ -8,7 +10,10 @@
#include "parse-events-bison.h"
#include "parse-events.h"
static int __value(char *str, int base, int token)
char *parse_events_get_text(yyscan_t yyscanner);
YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
static int __value(YYSTYPE *yylval, char *str, int base, int token)
{
long num;
@ -17,35 +22,48 @@ static int __value(char *str, int base, int token)
if (errno)
return PE_ERROR;
parse_events_lval.num = num;
yylval->num = num;
return token;
}
static int value(int base)
static int value(yyscan_t scanner, int base)
{
return __value(parse_events_text, base, PE_VALUE);
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
return __value(yylval, text, base, PE_VALUE);
}
static int raw(void)
static int raw(yyscan_t scanner)
{
return __value(parse_events_text + 1, 16, PE_RAW);
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
return __value(yylval, text + 1, 16, PE_RAW);
}
static int str(int token)
static int str(yyscan_t scanner, int token)
{
parse_events_lval.str = strdup(parse_events_text);
YYSTYPE *yylval = parse_events_get_lval(scanner);
char *text = parse_events_get_text(scanner);
yylval->str = strdup(text);
return token;
}
static int sym(int type, int config)
static int sym(yyscan_t scanner, int type, int config)
{
parse_events_lval.num = (type << 16) + config;
YYSTYPE *yylval = parse_events_get_lval(scanner);
yylval->num = (type << 16) + config;
return PE_VALUE_SYM;
}
static int term(int type)
static int term(yyscan_t scanner, int type)
{
parse_events_lval.num = type;
YYSTYPE *yylval = parse_events_get_lval(scanner);
yylval->num = type;
return PE_TERM;
}
@ -61,25 +79,25 @@ modifier_event [ukhpGH]{1,8}
modifier_bp [rwx]
%%
cpu-cycles|cycles { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
stalled-cycles-frontend|idle-cycles-frontend { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
stalled-cycles-backend|idle-cycles-backend { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
instructions { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
cache-references { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
cache-misses { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
branch-instructions|branches { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
branch-misses { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
bus-cycles { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
ref-cycles { return sym(PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
cpu-clock { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
task-clock { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
page-faults|faults { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
minor-faults { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
major-faults { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
context-switches|cs { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
cpu-migrations|migrations { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
alignment-faults { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
emulation-faults { return sym(PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
L1-dcache|l1-d|l1d|L1-data |
L1-icache|l1-i|l1i|L1-instruction |
@ -87,14 +105,14 @@ LLC|L2 |
dTLB|d-tlb|Data-TLB |
iTLB|i-tlb|Instruction-TLB |
branch|branches|bpu|btb|bpc |
node { return str(PE_NAME_CACHE_TYPE); }
node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
load|loads|read |
store|stores|write |
prefetch|prefetches |
speculative-read|speculative-load |
refs|Reference|ops|access |
misses|miss { return str(PE_NAME_CACHE_OP_RESULT); }
misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
/*
* These are event config hardcoded term names to be specified
@ -102,20 +120,20 @@ misses|miss { return str(PE_NAME_CACHE_OP_RESULT); }
* so we can put them here directly. In case the we have a conflict
* in future, this needs to go into '//' condition block.
*/
config { return term(PARSE_EVENTS__TERM_TYPE_CONFIG); }
config1 { return term(PARSE_EVENTS__TERM_TYPE_CONFIG1); }
config2 { return term(PARSE_EVENTS__TERM_TYPE_CONFIG2); }
name { return term(PARSE_EVENTS__TERM_TYPE_NAME); }
period { return term(PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
branch_type { return term(PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
mem: { BEGIN(mem); return PE_PREFIX_MEM; }
r{num_raw_hex} { return raw(); }
{num_dec} { return value(10); }
{num_hex} { return value(16); }
r{num_raw_hex} { return raw(yyscanner); }
{num_dec} { return value(yyscanner, 10); }
{num_hex} { return value(yyscanner, 16); }
{modifier_event} { return str(PE_MODIFIER_EVENT); }
{name} { return str(PE_NAME); }
{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
{name} { return str(yyscanner, PE_NAME); }
"/" { return '/'; }
- { return '-'; }
, { return ','; }
@ -123,17 +141,17 @@ r{num_raw_hex} { return raw(); }
= { return '='; }
<mem>{
{modifier_bp} { return str(PE_MODIFIER_BP); }
{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
: { return ':'; }
{num_dec} { return value(10); }
{num_hex} { return value(16); }
{num_dec} { return value(yyscanner, 10); }
{num_hex} { return value(yyscanner, 16); }
/*
* We need to separate 'mem:' scanner part, in order to get specific
* modifier bits parsed out. Otherwise we would need to handle PE_NAME
* and we'd need to parse it manually. During the escape from <mem>
* state we need to put the escaping char back, so we dont miss it.
*/
. { unput(*parse_events_text); BEGIN(INITIAL); }
. { unput(*yytext); BEGIN(INITIAL); }
/*
* We destroy the scanner after reaching EOF,
* but anyway just to be sure get back to INIT state.
@ -143,7 +161,7 @@ r{num_raw_hex} { return raw(); }
%%
int parse_events_wrap(void)
int parse_events_wrap(void *scanner __used)
{
return 1;
}

9
tools/perf/util/parse-events.y
View File

@ -1,6 +1,8 @@
%pure-parser
%name-prefix "parse_events_"
%parse-param {void *_data}
%parse-param {void *scanner}
%lex-param {void* scanner}
%{
@ -11,8 +13,9 @@
#include "types.h"
#include "util.h"
#include "parse-events.h"
#include "parse-events-bison.h"
extern int parse_events_lex (void);
extern int parse_events_lex (YYSTYPE* lvalp, void* scanner);
#define ABORT_ON(val) \
do { \
@ -286,7 +289,7 @@ sep_slash_dc: '/' | ':' |
%%
void parse_events_error(void *data __used,
void parse_events_error(void *data __used, void *scanner __used,
char const *msg __used)
{
}