linux-kernel - [PATCH v7 03/12] perf session: define bytes_transferred and bytes

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Message-ID: <fe521e87-d255-3cad-19a2-e082ee47d3ea@linux.intel.com>
Date:   Tue, 12 Mar 2019 08:15:11 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH v7 03/12] perf session: define bytes_transferred and
 bytes_compressed metrics


Define bytes_transferred and bytes_compressed metrics to calculate ratio
in the end of the data collection:

	compression ratio = bytes_transferred / bytes_compressed 

bytes_transferred accumulates the amount of bytes that was extracted from 
the mmaped kernel buffers for compression. bytes_compressed accumulates 
the amount of bytes that was received after applying compression.

Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
---
 tools/perf/builtin-record.c | 14 +++++++++++++-
 tools/perf/util/env.h       |  1 +
 tools/perf/util/session.h   |  2 ++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 736a0f008959..bc0a895e7e80 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1502,6 +1502,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 		char samples[128];
 		const char *postfix = rec->timestamp_filename ?
 					".<timestamp>" : "";
+		float ratio = 0;
 
 		if (rec->samples && !rec->opts.full_auxtrace)
 			scnprintf(samples, sizeof(samples),
@@ -1509,9 +1510,20 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)
 		else
 			samples[0] = '\0';
 
-		fprintf(stderr,	"[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
+		if (rec->session->bytes_transferred && rec->session->bytes_compressed) {
+			ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed;
+			session->header.env.comp_ratio = ratio + 0.5;
+		}
+
+		fprintf(stderr,	"[ perf record: Captured and wrote %.3f MB %s%s%s",
 			perf_data__size(data) / 1024.0 / 1024.0,
 			data->path, postfix, samples);
+		if (ratio) {
+			fprintf(stderr,	", compressed (original %.3f MB, ratio is %.3f)",
+					rec->session->bytes_transferred / 1024.0 / 1024.0,
+					ratio);
+		}
+		fprintf(stderr, " ]\n");
 	}
 
 out_delete_session:
diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
index d01b8355f4ca..fb39e9af128f 100644
--- a/tools/perf/util/env.h
+++ b/tools/perf/util/env.h
@@ -64,6 +64,7 @@ struct perf_env {
 	struct memory_node	*memory_nodes;
 	unsigned long long	 memory_bsize;
 	u64                     clockid_res_ns;
+	u32                     comp_ratio;
 };
 
 extern struct perf_env perf_env;
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index d96eccd7d27f..0e14884f28b2 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -35,6 +35,8 @@ struct perf_session {
 	struct ordered_events	ordered_events;
 	struct perf_data	*data;
 	struct perf_tool	*tool;
+	u64			bytes_transferred;
+	u64			bytes_compressed;
 };
 
 struct perf_tool;
-- 
2.20.1