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| author | Ian Rogers <irogers@google.com> | 2022-10-04 04:15:50 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-10-06 13:03:52 +0200 |
| commit | 4b65fc7bca1299de12ceeed1de31f252a185ed47 (patch) | |
| tree | c8c0e8b7b608019c88c55801c803aa9d17f3e6fe /tools/perf/util/expr.y | |
| parent | perf parse-events: Remove unused macros __PERF_EVENT_FIELD() (diff) | |
| download | linux-4b65fc7bca1299de12ceeed1de31f252a185ed47.tar.xz linux-4b65fc7bca1299de12ceeed1de31f252a185ed47.zip | |
perf expr: Allow a double if expression
Some TMA metrics have double if expressions like:
( CPU_CLK_UNHALTED.THREAD / 2 ) * ( 1 + CPU_CLK_UNHALTED.ONE_THREAD_ACTIVE / CPU_CLK_UNHALTED.REF_XCLK ) ) if #core_wide < 1 else ( CPU_CLK_UNHALTED.THREAD_ANY / 2 ) if #SMT_on else CPU_CLK_UNHALTED.THREAD
This currently fails to parse as the left hand side if expression needs
to be in parentheses. By allowing the if expression to have a right hand
side that is an if expression we can parse the expression above, with
left to right evaluation order that matches languages like Python.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Ahmad Yasin <ahmad.yasin@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kshipra Bopardikar <kshipra.bopardikar@intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Samantha Alt <samantha.alt@intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20221004021612.325521-2-irogers@google.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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y index a30b825adb7b..635e562350c5 100644 --- a/tools/perf/util/expr.y +++ b/tools/perf/util/expr.y @@ -156,7 +156,7 @@ start: if_expr } ; -if_expr: expr IF expr ELSE expr +if_expr: expr IF expr ELSE if_expr { if (fpclassify($3.val) == FP_ZERO) { /* |