linux-kernel - [PATCH 5.18 0925/1095] perf stat: Revert "perf stat: Add default hybrid events"

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Message-Id: <20220815180507.516164896@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 20:05:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kan Liang <kan.liang@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Xing Zhengjun <zhengjun.xing@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0925/1095] perf stat: Revert "perf stat: Add default hybrid events"

From: Kan Liang <kan.liang@...ux.intel.com>

[ Upstream commit ace3e31e653e79cae9b047e85f567e6b44c98532 ]

This reverts commit Fixes: ac2dc29edd21f9ec ("perf stat: Add default
hybrid events")

Between this patch and the reverted patch, the commit 6c1912898ed21bef
("perf parse-events: Rename parse_events_error functions") and the
commit 07eafd4e053a41d7 ("perf parse-event: Add init and exit to
parse_event_error") clean up the parse_events_error_*() codes. The
related change is also reverted.

The reverted patch is hard to be extended to support new default events,
e.g., Topdown events, and the existing "--detailed" option on a hybrid
platform.

A new solution will be proposed in the following patch to enable the
perf stat default on a hybrid platform.

Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
Acked-by: Ian Rogers <irogers@...gle.com>
Acked-by: Namhyung Kim <namhyung@...nel.org>
Cc: Alexander Shishkin <alexander.shishkin@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: https://lore.kernel.org/r/20220721065706.2886112-2-zhengjun.xing@linux.intel.com
Signed-off-by: Xing Zhengjun <zhengjun.xing@...ux.intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/perf/builtin-stat.c | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index f058e8cddfa8..e15fd6f9f7ea 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1663,12 +1663,6 @@ static int add_default_attributes(void)
   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS	},
   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES		},
 
-};
-	struct perf_event_attr default_sw_attrs[] = {
-  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK		},
-  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES	},
-  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS		},
-  { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS		},
 };
 
 /*
@@ -1910,30 +1904,6 @@ static int add_default_attributes(void)
 	}
 
 	if (!evsel_list->core.nr_entries) {
-		if (perf_pmu__has_hybrid()) {
-			struct parse_events_error errinfo;
-			const char *hybrid_str = "cycles,instructions,branches,branch-misses";
-
-			if (target__has_cpu(&target))
-				default_sw_attrs[0].config = PERF_COUNT_SW_CPU_CLOCK;
-
-			if (evlist__add_default_attrs(evsel_list,
-						      default_sw_attrs) < 0) {
-				return -1;
-			}
-
-			parse_events_error__init(&errinfo);
-			err = parse_events(evsel_list, hybrid_str, &errinfo);
-			if (err) {
-				fprintf(stderr,
-					"Cannot set up hybrid events %s: %d\n",
-					hybrid_str, err);
-				parse_events_error__print(&errinfo, hybrid_str);
-			}
-			parse_events_error__exit(&errinfo);
-			return err ? -1 : 0;
-		}
-
 		if (target__has_cpu(&target))
 			default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
 
-- 
2.35.1