[PATCH v9 10/24] perf record: Introduce data transferred and compressed stats

Alexey Bayduraev
2021-07-02T12:33:14Z

Introduce bytes_transferred and bytes_compressed stats so they
would capture statistics for the related data buffer transfers.

Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
---
tools/perf/builtin-record.c | 68 +++++++++++++++++++++++++++++--------
tools/perf/util/mmap.h | 2 ++
2 files changed, 56 insertions(+), 14 deletions(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 6419b7974435..4d1571234ba2 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -246,8 +246,8 @@ static int record__write(struct record *rec, struct mmap *map __maybe_unused,

static int record__aio_enabled(struct record *rec);
static int record__comp_enabled(struct record *rec);
-static size_t zstd_compress(struct perf_session *session, void *dst, size_t dst_size,
- void *src, size_t src_size);
+static size_t zstd_compress(struct zstd_data *data,
+ void *dst, size_t dst_size, void *src, size_t src_size);

#ifdef HAVE_AIO_SUPPORT
static int record__aio_write(struct aiocb *cblock, int trace_fd,
@@ -381,9 +381,13 @@ static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size
*/

if (record__comp_enabled(aio->rec)) {
- size = zstd_compress(aio->rec->session, aio->data + aio->size,
- mmap__mmap_len(map) - aio->size,
+ struct zstd_data *zstd_data = &aio->rec->session->zstd_data;
+
+ aio->rec->session->bytes_transferred += size;
+ size = zstd_compress(zstd_data,
+ aio->data + aio->size, mmap__mmap_len(map) - aio->size,
buf, size);
+ aio->rec->session->bytes_compressed += size;
} else {
memcpy(aio->data + aio->size, buf, size);
}
@@ -608,8 +612,22 @@ static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size)
struct record *rec = to;

if (record__comp_enabled(rec)) {
- size = zstd_compress(rec->session, map->data, mmap__mmap_len(map), bf, size);
+ struct zstd_data *zstd_data = &rec->session->zstd_data;
+
+ if (map->file) {
+ zstd_data = &map->zstd_data;
+ map->bytes_transferred += size;
+ } else {
+ rec->session->bytes_transferred += size;
+ }
+
+ size = zstd_compress(zstd_data, map->data, mmap__mmap_len(map), bf, size);
bf = map->data;
+
+ if (map->file)
+ map->bytes_compressed += size;
+ else
+ rec->session->bytes_compressed += size;
}

thread->samples++;
@@ -1394,18 +1412,15 @@ static size_t process_comp_header(void *record, size_t increment)
return size;
}

-static size_t zstd_compress(struct perf_session *session, void *dst, size_t dst_size,
+static size_t zstd_compress(struct zstd_data *zstd_data, void *dst, size_t dst_size,
void *src, size_t src_size)
{
size_t compressed;
size_t max_record_size = PERF_SAMPLE_MAX_SIZE - sizeof(struct perf_record_compressed) - 1;

- compressed = zstd_compress_stream_to_records(&session->zstd_data, dst, dst_size, src, src_size,
+ compressed = zstd_compress_stream_to_records(zstd_data, dst, dst_size, src, src_size,
max_record_size, process_comp_header);

- session->bytes_transferred += src_size;
- session->bytes_compressed += compressed;
-
return compressed;
}

@@ -2091,8 +2106,10 @@ static int record__start_threads(struct record *rec)

static int record__stop_threads(struct record *rec, unsigned long *waking)
{
- int t;
+ int t, tm;
+ struct mmap *map, *overwrite_map;
struct record_thread *thread_data = rec->thread_data;
+ u64 bytes_written, bytes_transferred, bytes_compressed;

for (t = 1; t < rec->nr_threads; t++)
record__terminate_thread(&thread_data[t]);
@@ -2100,9 +2117,32 @@ static int record__stop_threads(struct record *rec, unsigned long *waking)
for (t = 0; t < rec->nr_threads; t++) {
rec->samples += thread_data[t].samples;
*waking += thread_data[t].waking;
- pr_debug("threads[%d]: samples=%lld, wakes=%ld, trasferred=%ld, compressed=%ld\n",
- thread_data[t].tid, thread_data[t].samples, thread_data[t].waking,
- rec->session->bytes_transferred, rec->session->bytes_compressed);
+ bytes_transferred = 0;
+ bytes_compressed = 0;
+ bytes_written = t ? 0 : rec->bytes_written;
+ for (tm = 0; tm < thread_data[t].nr_mmaps; tm++) {
+ if (thread_data[t].maps) {
+ map = thread_data[t].maps[tm];
+ bytes_transferred += map->bytes_transferred;
+ bytes_compressed += map->bytes_compressed;
+ bytes_written += map->bytes_written;
+ }
+ if (thread_data[t].overwrite_maps) {
+ overwrite_map = thread_data[t].overwrite_maps[tm];
+ bytes_transferred += overwrite_map->bytes_transferred;
+ bytes_compressed += overwrite_map->bytes_compressed;
+ bytes_written += overwrite_map->bytes_written;
+ }
+ }
+ rec->session->bytes_transferred += bytes_transferred;
+ rec->session->bytes_compressed += bytes_compressed;
+ pr_debug("threads[%d]: samples=%lld, wakes=%ld, ",
+ thread_data[t].tid, thread_data[t].samples, thread_data[t].waking);
+ if (bytes_compressed)
+ pr_debug("trasferred=%ld, compressed=%ld\n",
+ bytes_transferred, bytes_compressed);
+ else
+ pr_debug("written=%ld\n", bytes_written);
}

return 0;
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index 67d41003d82e..f5e8c8a24e68 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -47,6 +47,8 @@ struct mmap {
struct perf_data_file *file;
struct zstd_data zstd_data;
u64 bytes_written;
+ u64 bytes_transferred;
+ u64 bytes_compressed;
};

struct mmap_params {
--
2.19.0