linux-kernel - [PATCH V2 2/6] perf,tools: read cpu max freq and msr type from header

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Date:	Fri, 24 Jul 2015 09:48:28 -0400
From:	kan.liang@...el.com
To:	a.p.zijlstra@...llo.nl, acme@...nel.org
Cc:	luto@...nel.org, mingo@...hat.com, eranian@...gle.com,
	ak@...ux.intel.com, mark.rutland@....com, adrian.hunter@...el.com,
	jolsa@...nel.org, namhyung@...nel.org,
	linux-kernel@...r.kernel.org, Kan Liang <kan.liang@...el.com>
Subject: [PATCH V2 2/6] perf,tools: read cpu max freq and msr type from header

From: Kan Liang <kan.liang@...el.com>

In perf report, read cpu max freq and msr type from header.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 tools/perf/builtin-report.c |  3 +++
 tools/perf/util/cpumap.h    |  1 +
 tools/perf/util/header.c    | 21 +++++++++++++++++++++
 tools/perf/util/header.h    |  2 ++
 tools/perf/util/session.h   |  1 +
 5 files changed, 28 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 95a4771..2a32e9a 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -818,6 +818,9 @@ repeat:
 		symbol_conf.cumulate_callchain = false;
 	}
 
+	cpu_max_freq = session->header.env.cpu_max_freq;
+	msr_pmu_type = perf_header_find_pmu_type(session, "msr");
+
 	if (setup_sorting() < 0) {
 		if (sort_order)
 			parse_options_usage(report_usage, options, "s", 1);
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index 6784677..70ac686 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -56,6 +56,7 @@ static inline bool cpu_map__empty(const struct cpu_map *map)
 int max_cpu_num;
 int max_node_num;
 int *cpunode_map;
+unsigned int cpu_max_freq;
 
 int cpu__setup_cpunode_map(void);
 unsigned int get_cpu_max_freq(void);
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 287a488..e83681b 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2847,3 +2847,24 @@ int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
 				 session);
 	return 0;
 }
+
+int perf_header_find_pmu_type(struct perf_session *session, const char *name)
+{
+	u32 pmu_num = session->header.env.nr_pmu_mappings;
+	u32 type;
+	char *str, *tmp;
+
+	str = session->header.env.pmu_mappings;
+	while (pmu_num--) {
+		type = strtoul(str, &tmp, 0);
+		if (*tmp != ':') {
+			pr_err("unable to read pmu mappings from head\n");
+			return -1;
+		}
+		str = tmp + 1;
+		if (!strcmp(str, name))
+			return type;
+		str += strlen(str) + 1;
+	}
+	return -1;
+}
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index a646025..233644b 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -150,6 +150,8 @@ int perf_event__process_build_id(struct perf_tool *tool,
 				 struct perf_session *session);
 bool is_perf_magic(u64 magic);
 
+int perf_header_find_pmu_type(struct perf_session *s, const char *name);
+
 #define NAME_ALIGN 64
 
 int write_padded(int fd, const void *bf, size_t count, size_t count_aligned);
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index b44afc7..a339338 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -17,6 +17,7 @@ struct thread;
 
 struct auxtrace;
 struct itrace_synth_opts;
+unsigned int msr_pmu_type;
 
 struct perf_session {
 	struct perf_header	header;
-- 
1.8.3.1

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