linux/tools/perf/util/expr.l
Ian Rogers ff1a12f962 perf expr: Add < and > operators
These are broadly useful but required to handle TMA metrics. For example
encoding Ports_Utilization from:

  https://download.01.org/perfmon/TMA_Metrics.csv

requires '<'.

  {
    "BriefDescription": "This metric estimates fraction of cycles the CPU performance was potentially limited due to Core computation issues (non divider-related).  Two distinct categories can be attributed into this metric: (1) heavy data-dependency among contiguous instructions would manifest in this metric - such cases are often referred to as low Instruction Level Parallelism (ILP). (2) Contention on some hardware execution unit other than Divider. For example; when there are too many multiply operations.",
    "MetricExpr": "( ( cpu@EXE_ACTIVITY.EXE_BOUND_0_PORTS@ + cpu@EXE_ACTIVITY.1_PORTS_UTIL@ + ( cpu@EXE_ACTIVITY.2_PORTS_UTIL@ * ( ( ( cpu@UOPS_RETIRED.RETIRE_SLOTS@ ) / ( cpu@CPU_CLK_UNHALTED.THREAD@ ) ) / ( ( 4.000000 ) + 1.000000 ) ) ) ) / ( cpu@CPU_CLK_UNHALTED.THREAD@ ) if ( cpu@ARITH.DIVIDER_ACTIVE\\,cmask\\=1@ < cpu@EXE_ACTIVITY.EXE_BOUND_0_PORTS@ ) else ( ( cpu@EXE_ACTIVITY.EXE_BOUND_0_PORTS@ + cpu@EXE_ACTIVITY.1_PORTS_UTIL@ + ( cpu@EXE_ACTIVITY.2_PORTS_UTIL@ * ( ( ( cpu@UOPS_RETIRED.RETIRE_SLOTS@ ) / ( cpu@CPU_CLK_UNHALTED.THREAD@ ) ) / ( ( 4.000000 ) + 1.000000 ) ) ) ) - cpu@EXE_ACTIVITY.EXE_BOUND_0_PORTS@ ) / ( cpu@CPU_CLK_UNHALTED.THREAD@ ) )",
    "MetricGroup": "Topdown_Group_Ports_Utilization",
    "MetricName": "Topdown_Metric_Ports_Utilization"
  },

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200610235823.52557-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2020-06-22 16:28:09 -03:00

131 lines
2.3 KiB
Plaintext

%option prefix="expr_"
%option reentrant
%option bison-bridge
%{
#include <linux/compiler.h>
#include "expr.h"
#include "expr-bison.h"
char *expr_get_text(yyscan_t yyscanner);
YYSTYPE *expr_get_lval(yyscan_t yyscanner);
static double __value(YYSTYPE *yylval, char *str, int token)
{
double num;
errno = 0;
num = strtod(str, NULL);
if (errno)
return EXPR_ERROR;
yylval->num = num;
return token;
}
static int value(yyscan_t scanner)
{
YYSTYPE *yylval = expr_get_lval(scanner);
char *text = expr_get_text(scanner);
return __value(yylval, text, NUMBER);
}
/*
* Allow @ instead of / to be able to specify pmu/event/ without
* conflicts with normal division.
*/
static char *normalize(char *str, int runtime)
{
char *ret = str;
char *dst = str;
while (*str) {
if (*str == '@')
*dst++ = '/';
else if (*str == '\\')
*dst++ = *++str;
else if (*str == '?') {
char *paramval;
int i = 0;
int size = asprintf(&paramval, "%d", runtime);
if (size < 0)
*dst++ = '0';
else {
while (i < size)
*dst++ = paramval[i++];
free(paramval);
}
}
else
*dst++ = *str;
str++;
}
*dst = 0x0;
return ret;
}
static int str(yyscan_t scanner, int token, int runtime)
{
YYSTYPE *yylval = expr_get_lval(scanner);
char *text = expr_get_text(scanner);
yylval->str = normalize(strdup(text), runtime);
if (!yylval->str)
return EXPR_ERROR;
yylval->str = normalize(yylval->str, runtime);
return token;
}
%}
number ([0-9]+\.?[0-9]*|[0-9]*\.?[0-9]+)
sch [-,=]
spec \\{sch}
sym [0-9a-zA-Z_\.:@?]+
symbol ({spec}|{sym})+
%%
struct expr_scanner_ctx *sctx = expr_get_extra(yyscanner);
{
int start_token = sctx->start_token;
if (sctx->start_token) {
sctx->start_token = 0;
return start_token;
}
}
d_ratio { return D_RATIO; }
max { return MAX; }
min { return MIN; }
if { return IF; }
else { return ELSE; }
#smt_on { return SMT_ON; }
{number} { return value(yyscanner); }
{symbol} { return str(yyscanner, ID, sctx->runtime); }
"|" { return '|'; }
"^" { return '^'; }
"&" { return '&'; }
"<" { return '<'; }
">" { return '>'; }
"-" { return '-'; }
"+" { return '+'; }
"*" { return '*'; }
"/" { return '/'; }
"%" { return '%'; }
"(" { return '('; }
")" { return ')'; }
"," { return ','; }
. { }
%%
int expr_wrap(void *scanner __maybe_unused)
{
return 1;
}