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| author |  James Clark <james.clark@arm.com>
| 2023-08-16 12:47:46 +0100 |
|---|---|---|
| committer |  Arnaldo Carvalho de Melo <acme@redhat.com>
| 2023-08-17 14:12:14 -0300 |
| commit | 9d5da30e4ae9910ed5dd15636534a22a46f0066f (patch) | |
| tree | 88a5ba017ea89d0bbdf268e09abc2e65aea88510 /tools/perf/util/expr.y | |
| parent | perf test: Add a test for the new Arm CPU ID comparison behavior (diff) | |
| download | linux-9d5da30e4ae9910ed5dd15636534a22a46f0066f.tar.gz linux-9d5da30e4ae9910ed5dd15636534a22a46f0066f.tar.bz2 linux-9d5da30e4ae9910ed5dd15636534a22a46f0066f.zip | |
perf jevents: Add a new expression builtin strcmp_cpuid_str()
This will allow writing formulas that are conditional on a specific
CPU type or CPU version. It calls through to the existing
strcmp_cpuid_str() function in Perf which has a default weak version,
and an arch specific version for x86 and arm64.
The function takes an 'ID' type value, which is a string. But in this
case Arm CPU IDs are hex numbers prefixed with '0x'. metric.py
assumes strings are only used by event names, and that they can't start
with a number ('0'), so an additional change has to be made to the
regex to convert hex numbers back to 'ID' types.
Signed-off-by: James Clark <james.clark@arm.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Haixin Yu <yuhaixin.yhx@linux.alibaba.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Forrington <nick.forrington@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Sohom Datta <sohomdatta1@gmail.com>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230816114841.1679234-5-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/expr.y')
| -rw-r--r-- | tools/perf/util/expr.y | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y index 65d54a6f29ad..6c93b358cc2d 100644 --- a/tools/perf/util/expr.y +++ b/tools/perf/util/expr.y @@ -39,7 +39,7 @@ int expr_lex(YYSTYPE * yylval_param , void *yyscanner); } ids; } -%token ID NUMBER MIN MAX IF ELSE LITERAL D_RATIO SOURCE_COUNT HAS_EVENT EXPR_ERROR +%token ID NUMBER MIN MAX IF ELSE LITERAL D_RATIO SOURCE_COUNT HAS_EVENT STRCMP_CPUID_STR EXPR_ERROR %left MIN MAX IF %left '|' %left '^' @@ -207,6 +207,12 @@ expr: NUMBER $$.ids = NULL; free($3); } +| STRCMP_CPUID_STR '(' ID ')' +{ + $$.val = expr__strcmp_cpuid_str(ctx, compute_ids, $3); + $$.ids = NULL; + free($3); +} | expr '|' expr { if (is_const($1.val) && is_const($3.val)) { |