# Copyright (C) 2025 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


# There are specific counter tracks added to Perfetto trace of each process that increment when a
# new instance of a Bitmap class is created and decrements when an instance is cleaned up. There is
# also a counter that tracks the memory used by the Bitmap class for the duration of the trace.
# This metric computes aggregations on both of these counters.

# We compute the duration of the current counter value by subtracting the current timestamp
# from the timestamp of the next counter value.
# The LEAD function is used to get the next
# timestamp. If there is no next timestamp, it uses the end of the trace as the next timestamp.
query: {
  id: "bitmap_counter_span"
  sql: {
    column_names: "process_name"
    column_names: "counter_name"
    column_names: "metric_val"
    column_names: "dur"
    sql: "
      INCLUDE PERFETTO MODULE android.bitmaps;

      SELECT p.name as process_name, 'Bitmap Count' AS counter_name, value AS metric_val, dur
      FROM android_bitmap_count
      JOIN process as p USING (upid)
      UNION ALL
      SELECT p.name as process_name, 'Bitmap Memory' AS counter_name, value AS metric_val, dur
      FROM android_bitmap_memory
      JOIN process as p USING (upid)
    "
  }
}

metric_template_spec: {
  id_prefix: "android_bitmap_metric"
  dimensions: "process_name"
  dimensions: "counter_name"
  value_columns: "min_val"
  value_columns: "max_val"
  value_columns: "avg_val"
  query: {
    inner_query_id: "bitmap_counter_span"
    filters: {
      column_name: "process_name"
      op: EQUAL
      string_rhs: "com.android.systemui"
      string_rhs: "com.google.android.apps.nexuslauncher"
    }
    group_by: {
      column_names: "process_name"
      column_names: "counter_name"
      aggregates: {
        column_name: "metric_val"
        op: MIN
        result_column_name: "min_val"
      }
      aggregates: {
        column_name: "metric_val"
        op: MAX
        result_column_name: "max_val"
      }
      aggregates: {
        column_name: "metric_val"
        op: DURATION_WEIGHTED_MEAN
        result_column_name: "avg_val"
      }
    }
  }
}