linux-kernel - [PATCH v1 07/22] perf expr: Add #target

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Message-ID: <20251024175857.808401-8-irogers@google.com>
Date: Fri, 24 Oct 2025 10:58:42 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	James Clark <james.clark@...aro.org>, Xu Yang <xu.yang_2@....com>, 
	Chun-Tse Shao <ctshao@...gle.com>, Thomas Richter <tmricht@...ux.ibm.com>, 
	Sumanth Korikkar <sumanthk@...ux.ibm.com>, Collin Funk <collin.funk1@...il.com>, 
	Thomas Falcon <thomas.falcon@...el.com>, Howard Chu <howardchu95@...il.com>, 
	Dapeng Mi <dapeng1.mi@...ux.intel.com>, Levi Yun <yeoreum.yun@....com>, 
	Yang Li <yang.lee@...ux.alibaba.com>, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org
Subject: [PATCH v1 07/22] perf expr: Add #target_cpu literal

For CPU nanoseconds a lot of the stat-shadow metrics use either
task-clock or cpu-clock, the latter being used when
target__has_cpu. Add a #target_cpu literal so that json metrics can
perform the same test.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/expr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index 7fda0ff89c16..4df56f2b283d 100644
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -409,6 +409,9 @@ double expr__get_literal(const char *literal, const struct expr_scanner_ctx *ctx
 	} else if (!strcmp("#core_wide", literal)) {
 		result = core_wide(ctx->system_wide, ctx->user_requested_cpu_list)
 			? 1.0 : 0.0;
+	} else if (!strcmp("#target_cpu", literal)) {
+		result = (ctx->system_wide || ctx->user_requested_cpu_list)
+			? 1.0 : 0.0;
 	} else {
 		pr_err("Unrecognized literal '%s'", literal);
 	}
-- 
2.51.1.821.gb6fe4d2222-goog