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![Alexey Budankov](/assets/img/avatar_default.png)
Enable complex event names containing [.:=,] symbols to be encoded into Perf trace using name= modifier e.g. like this: perf record -e cpu/name=\'OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM\',\ period=0x3567e0,event=0x3c,cmask=0x1/Duk ./futex Below is how it looks like in the report output. Please note explicit escaped quoting at cmdline string in the header so that thestring can be directly reused for another collection in shell: perf report --header # ======== ... # cmdline : /root/abudanko/kernel/tip/tools/perf/perf record -v -e cpu/name=\'OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM\',period=0x3567e0,event=0x3c,cmask=0x1/Duk ./futex # event : name = OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM, , type = 4, size = 112, config = 0x100003c, { sample_period, sample_freq } = 3500000, sample_type = IP|TID|TIME, disabled = 1, inh ... # ======== # # # Total Lost Samples: 0 # # Samples: 24K of event 'OFFCORE_RESPONSE:request=DEMAND_RFO:response=L3_HIT.SNOOP_HITM' # Event count (approx.): 86492000000 # # Overhead Command Shared Object Symbol # ........ ....... ................ .............................................. # 14.75% futex [kernel.vmlinux] [k] __entry_trampoline_start ... perf stat -e cpu/name=\'CPU_CLK_UNHALTED.THREAD:cmask=0x1\',period=0x3567e0,event=0x3c,cmask=0x1/Duk ./futex 10000000 process context switches in 16678890291ns (1667.9ns/ctxsw) Performance counter stats for './futex': 88,095,770,571 CPU_CLK_UNHALTED.THREAD:cmask=0x1 16.679542407 seconds time elapsed Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/c194b060-761d-0d50-3b21-bb4ed680002d@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
378 lines
11 KiB
Text
378 lines
11 KiB
Text
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%option reentrant
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%option bison-bridge
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%option prefix="parse_events_"
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%option stack
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%option bison-locations
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%option yylineno
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%option reject
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%{
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "../perf.h"
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#include "parse-events.h"
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#include "parse-events-bison.h"
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char *parse_events_get_text(yyscan_t yyscanner);
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YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
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static int __value(YYSTYPE *yylval, char *str, int base, int token)
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{
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u64 num;
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errno = 0;
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num = strtoull(str, NULL, base);
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if (errno)
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return PE_ERROR;
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yylval->num = num;
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return token;
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}
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static int value(yyscan_t scanner, int base)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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char *text = parse_events_get_text(scanner);
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return __value(yylval, text, base, PE_VALUE);
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}
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static int raw(yyscan_t scanner)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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char *text = parse_events_get_text(scanner);
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return __value(yylval, text + 1, 16, PE_RAW);
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}
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static int str(yyscan_t scanner, int token)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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char *text = parse_events_get_text(scanner);
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if (text[0] != '\'') {
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yylval->str = strdup(text);
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} else {
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/*
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* If a text tag specified on the command line
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* contains opening single quite ' then it is
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* expected that the tag ends with single quote
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* as well, like this:
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* name=\'CPU_CLK_UNHALTED.THREAD:cmask=1\'
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* quotes need to be escaped to bypass shell
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* processing.
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*/
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yylval->str = strndup(&text[1], strlen(text) - 2);
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}
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return token;
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}
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static bool isbpf_suffix(char *text)
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{
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int len = strlen(text);
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if (len < 2)
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return false;
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if ((text[len - 1] == 'c' || text[len - 1] == 'o') &&
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text[len - 2] == '.')
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return true;
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if (len > 4 && !strcmp(text + len - 4, ".obj"))
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return true;
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return false;
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}
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static bool isbpf(yyscan_t scanner)
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{
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char *text = parse_events_get_text(scanner);
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struct stat st;
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if (!isbpf_suffix(text))
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return false;
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return stat(text, &st) == 0;
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}
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/*
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* This function is called when the parser gets two kind of input:
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*
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* @cfg1 or @cfg2=config
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*
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* The leading '@' is stripped off before 'cfg1' and 'cfg2=config' are given to
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* bison. In the latter case it is necessary to keep the string intact so that
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* the PMU kernel driver can determine what configurable is associated to
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* 'config'.
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*/
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static int drv_str(yyscan_t scanner, int token)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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char *text = parse_events_get_text(scanner);
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/* Strip off the '@' */
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yylval->str = strdup(text + 1);
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return token;
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}
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#define REWIND(__alloc) \
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do { \
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YYSTYPE *__yylval = parse_events_get_lval(yyscanner); \
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char *text = parse_events_get_text(yyscanner); \
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\
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if (__alloc) \
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__yylval->str = strdup(text); \
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\
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yycolumn -= strlen(text); \
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yyless(0); \
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} while (0)
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static int pmu_str_check(yyscan_t scanner)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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char *text = parse_events_get_text(scanner);
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yylval->str = strdup(text);
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switch (perf_pmu__parse_check(text)) {
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case PMU_EVENT_SYMBOL_PREFIX:
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return PE_PMU_EVENT_PRE;
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case PMU_EVENT_SYMBOL_SUFFIX:
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return PE_PMU_EVENT_SUF;
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case PMU_EVENT_SYMBOL:
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return PE_KERNEL_PMU_EVENT;
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default:
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return PE_NAME;
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}
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}
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static int sym(yyscan_t scanner, int type, int config)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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yylval->num = (type << 16) + config;
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return type == PERF_TYPE_HARDWARE ? PE_VALUE_SYM_HW : PE_VALUE_SYM_SW;
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}
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static int term(yyscan_t scanner, int type)
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{
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YYSTYPE *yylval = parse_events_get_lval(scanner);
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yylval->num = type;
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return PE_TERM;
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}
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#define YY_USER_ACTION \
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do { \
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yylloc->last_column = yylloc->first_column; \
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yylloc->first_column = yycolumn; \
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yycolumn += yyleng; \
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} while (0);
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#define USER_REJECT \
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yycolumn -= yyleng; \
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REJECT
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%}
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%x mem
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%s config
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%x event
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%x array
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group [^,{}/]*[{][^}]*[}][^,{}/]*
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event_pmu [^,{}/]+[/][^/]*[/][^,{}/]*
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event [^,{}/]+
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bpf_object [^,{}]+\.(o|bpf)[a-zA-Z0-9._]*
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bpf_source [^,{}]+\.c[a-zA-Z0-9._]*
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num_dec [0-9]+
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num_hex 0x[a-fA-F0-9]+
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num_raw_hex [a-fA-F0-9]+
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name [a-zA-Z_*?\[\]][a-zA-Z0-9_*?.\[\]]*
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name_tag [\'][a-zA-Z_*?\[\]][a-zA-Z0-9_*?\-,\.\[\]:=]*[\']
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name_minus [a-zA-Z_*?][a-zA-Z0-9\-_*?.:]*
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drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
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/* If you add a modifier you need to update check_modifier() */
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modifier_event [ukhpPGHSDIW]+
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modifier_bp [rwx]{1,3}
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%%
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%{
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{
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int start_token;
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start_token = parse_events_get_extra(yyscanner);
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if (start_token == PE_START_TERMS)
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BEGIN(config);
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else if (start_token == PE_START_EVENTS)
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BEGIN(event);
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if (start_token) {
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parse_events_set_extra(NULL, yyscanner);
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/*
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* The flex parser does not init locations variable
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* via the scan_string interface, so we need do the
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* init in here.
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*/
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yycolumn = 0;
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return start_token;
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}
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}
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%}
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<event>{
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{group} {
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BEGIN(INITIAL);
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REWIND(0);
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}
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{event_pmu} |
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{bpf_object} |
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{bpf_source} |
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{event} {
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BEGIN(INITIAL);
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REWIND(1);
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return PE_EVENT_NAME;
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}
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<<EOF>> {
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BEGIN(INITIAL);
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REWIND(0);
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}
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}
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<array>{
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"]" { BEGIN(config); return ']'; }
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{num_dec} { return value(yyscanner, 10); }
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{num_hex} { return value(yyscanner, 16); }
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, { return ','; }
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"\.\.\." { return PE_ARRAY_RANGE; }
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}
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<config>{
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/*
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* Please update config_term_names when new static term is added.
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*/
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config { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
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config1 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
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config2 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
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name { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
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period { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
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freq { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ); }
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branch_type { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
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time { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_TIME); }
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call-graph { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CALLGRAPH); }
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stack-size { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_STACKSIZE); }
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max-stack { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_MAX_STACK); }
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inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_INHERIT); }
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no-inherit { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOINHERIT); }
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overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_OVERWRITE); }
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no-overwrite { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NOOVERWRITE); }
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, { return ','; }
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"/" { BEGIN(INITIAL); return '/'; }
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{name_minus} { return str(yyscanner, PE_NAME); }
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\[all\] { return PE_ARRAY_ALL; }
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"[" { BEGIN(array); return '['; }
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@{drv_cfg_term} { return drv_str(yyscanner, PE_DRV_CFG_TERM); }
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}
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<mem>{
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{modifier_bp} { return str(yyscanner, PE_MODIFIER_BP); }
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: { return ':'; }
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"/" { return '/'; }
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{num_dec} { return value(yyscanner, 10); }
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{num_hex} { return value(yyscanner, 16); }
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/*
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* We need to separate 'mem:' scanner part, in order to get specific
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* modifier bits parsed out. Otherwise we would need to handle PE_NAME
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* and we'd need to parse it manually. During the escape from <mem>
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* state we need to put the escaping char back, so we dont miss it.
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*/
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. { unput(*yytext); BEGIN(INITIAL); }
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/*
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* We destroy the scanner after reaching EOF,
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* but anyway just to be sure get back to INIT state.
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*/
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<<EOF>> { BEGIN(INITIAL); }
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}
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cpu-cycles|cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
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stalled-cycles-frontend|idle-cycles-frontend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
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stalled-cycles-backend|idle-cycles-backend { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
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instructions { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS); }
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cache-references { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_REFERENCES); }
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cache-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CACHE_MISSES); }
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branch-instructions|branches { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_INSTRUCTIONS); }
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branch-misses { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BRANCH_MISSES); }
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bus-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_BUS_CYCLES); }
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ref-cycles { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_REF_CPU_CYCLES); }
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cpu-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK); }
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task-clock { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK); }
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page-faults|faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS); }
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minor-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN); }
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major-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ); }
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context-switches|cs { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES); }
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cpu-migrations|migrations { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS); }
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alignment-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_ALIGNMENT_FAULTS); }
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emulation-faults { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_EMULATION_FAULTS); }
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dummy { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
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duration_time { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_DUMMY); }
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bpf-output { return sym(yyscanner, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_BPF_OUTPUT); }
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/*
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* We have to handle the kernel PMU event cycles-ct/cycles-t/mem-loads/mem-stores separately.
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* Because the prefix cycles is mixed up with cpu-cycles.
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* loads and stores are mixed up with cache event
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*/
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cycles-ct { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
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cycles-t { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
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mem-loads { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
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mem-stores { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
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topdown-[a-z-]+ { return str(yyscanner, PE_KERNEL_PMU_EVENT); }
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L1-dcache|l1-d|l1d|L1-data |
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L1-icache|l1-i|l1i|L1-instruction |
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LLC|L2 |
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dTLB|d-tlb|Data-TLB |
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iTLB|i-tlb|Instruction-TLB |
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branch|branches|bpu|btb|bpc |
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node { return str(yyscanner, PE_NAME_CACHE_TYPE); }
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load|loads|read |
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store|stores|write |
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prefetch|prefetches |
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speculative-read|speculative-load |
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refs|Reference|ops|access |
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misses|miss { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
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mem: { BEGIN(mem); return PE_PREFIX_MEM; }
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r{num_raw_hex} { return raw(yyscanner); }
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{num_dec} { return value(yyscanner, 10); }
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{num_hex} { return value(yyscanner, 16); }
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{modifier_event} { return str(yyscanner, PE_MODIFIER_EVENT); }
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{bpf_object} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_OBJECT); }
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{bpf_source} { if (!isbpf(yyscanner)) { USER_REJECT }; return str(yyscanner, PE_BPF_SOURCE); }
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{name} { return pmu_str_check(yyscanner); }
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{name_tag} { return str(yyscanner, PE_NAME); }
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"/" { BEGIN(config); return '/'; }
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- { return '-'; }
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, { BEGIN(event); return ','; }
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: { return ':'; }
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"{" { BEGIN(event); return '{'; }
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"}" { return '}'; }
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= { return '='; }
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\n { }
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. { }
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%%
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int parse_events_wrap(void *scanner __maybe_unused)
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{
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return 1;
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}
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