perf record: Introduce bytes written stats

Introduce a function to calculate the total amount of data written
and use it to support the --max-size option.

Reviewed-by: Riccardo Mancini <rickyman7@gmail.com>
Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Riccardo Mancini <rickyman7@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/3e2c69186641446f8ab003ec209bccc762b3394d.1642440724.git.alexey.v.bayduraev@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 8766a3dc9440cab45fc18f6b06e6a6125f4c0779..50981bbc98bb09e2b764f3c1ce2e79d15c05369d 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -110,6 +110,7 @@ struct record_thread {
        struct record           *rec;
        unsigned long long      samples;
        unsigned long           waking;
+       u64                     bytes_written;
 };
 
 static __thread struct record_thread *thread;
@@ -194,10 +195,22 @@ static bool switch_output_time(struct record *rec)
               trigger_is_ready(&switch_output_trigger);
 }
 
+static u64 record__bytes_written(struct record *rec)
+{
+       int t;
+       u64 bytes_written = rec->bytes_written;
+       struct record_thread *thread_data = rec->thread_data;
+
+       for (t = 0; t < rec->nr_threads; t++)
+               bytes_written += thread_data[t].bytes_written;
+
+       return bytes_written;
+}
+
 static bool record__output_max_size_exceeded(struct record *rec)
 {
        return rec->output_max_size &&
-              (rec->bytes_written >= rec->output_max_size);
+              (record__bytes_written(rec) >= rec->output_max_size);
 }
 
 static int record__write(struct record *rec, struct mmap *map __maybe_unused,
@@ -213,13 +226,15 @@ static int record__write(struct record *rec, struct mmap *map __maybe_unused,
                return -1;
        }
 
-       if (!(map && map->file))
+       if (map && map->file)
+               thread->bytes_written += size;
+       else
                rec->bytes_written += size;
 
        if (record__output_max_size_exceeded(rec) && !done) {
                fprintf(stderr, "[ perf record: perf size limit reached (%" PRIu64 " KB),"
                                " stopping session ]\n",
-                               rec->bytes_written >> 10);
+                               record__bytes_written(rec) >> 10);
                done = 1;
        }