Commit d3c8c08e authored by Alexey Budankov's avatar Alexey Budankov Committed by Arnaldo Carvalho de Melo
Browse files

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

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

Signed-off-by: default avatarAlexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1d4bf499-cb03-26dc-6fc6-f14fec7622ce@linux.intel.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 5b6f5aef

tools/perf/builtin-record.c

+13 −1
Original line number Original line Diff line number Diff line
@@ -1186,6 +1186,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) 
	bool disabled = false, draining = false;

	bool disabled = false, draining = false;

	struct perf_evlist *sb_evlist = NULL;

	struct perf_evlist *sb_evlist = NULL;

	int fd;

	int fd;

	float ratio = 0;





	atexit(record__sig_exit);

	atexit(record__sig_exit);

	signal(SIGCHLD, sig_handler);

	signal(SIGCHLD, sig_handler);
@@ -1491,6 +1492,11 @@ out_child: 
	record__mmap_read_all(rec, true);

	record__mmap_read_all(rec, true);

	record__aio_mmap_read_sync(rec);

	record__aio_mmap_read_sync(rec);





	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;

	}



	if (forks) {

	if (forks) {

		int exit_status;

		int exit_status;
@@ -1537,9 +1543,15 @@ out_child: 
		else

		else

			samples[0] = '\0';

			samples[0] = '\0';





		fprintf(stderr,	"[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",

		fprintf(stderr,	"[ perf record: Captured and wrote %.3f MB %s%s%s",

			perf_data__size(data) / 1024.0 / 1024.0,

			perf_data__size(data) / 1024.0 / 1024.0,

			data->path, postfix, samples);

			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:

out_delete_session:

tools/perf/util/env.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -62,6 +62,7 @@ struct perf_env { 
	struct cpu_topology_map	*cpu;

	struct cpu_topology_map	*cpu;

	struct cpu_cache_level	*caches;

	struct cpu_cache_level	*caches;

	int			 caches_cnt;

	int			 caches_cnt;

	u32			comp_ratio;

	struct numa_node	*numa_nodes;

	struct numa_node	*numa_nodes;

	struct memory_node	*memory_nodes;

	struct memory_node	*memory_nodes;

	unsigned long long	 memory_bsize;

	unsigned long long	 memory_bsize;

tools/perf/util/session.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -35,6 +35,8 @@ struct perf_session { 
	struct ordered_events	ordered_events;

	struct ordered_events	ordered_events;

	struct perf_data	*data;

	struct perf_data	*data;

	struct perf_tool	*tool;

	struct perf_tool	*tool;

	u64			bytes_transferred;

	u64			bytes_compressed;

};

};





struct perf_tool;

struct perf_tool;

CRA Git | Maintained and supported by SUSTech CRA and CCSE