| -- |
| -- Copyright 2020 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 |
| -- |
| -- https://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. |
| |
| -- This metric assigns a power drain rate in milliampers to each sched slice. |
| -- The power_profile table should be populated with device power profile data |
| -- before running the metric. It has the following scheme: |
| -- (device STRING, cpu INT, cluster INT, freq INT, power DOUBLE). |
| -- |
| -- Metric usage examples: |
| -- 1) Compute the power cost of every thread in milliamper-seconds: |
| -- SELECT |
| -- utid, |
| -- SUM(dur * COALESCE(power_ma, 0) / 1e9) AS power_mas |
| -- FROM power_per_thread |
| -- GROUP BY utid; |
| -- 2) Compute the total power cost of all slices from a table 'my_slice': |
| -- CREATE VIEW my_slice_utid AS |
| -- SELECT ts, dur, utid |
| -- FROM my_slice |
| -- INNER JOIN thread_track ON track_id = thread_track.id; |
| -- |
| -- CREATE VIRTUAL TABLE my_slice_power |
| -- USING SPAN_JOIN(power_per_thread PARTITIONED utid, |
| -- my_slice_utid PARTITIONED utid); |
| -- |
| -- SELECT |
| -- SUM(dur * COALESCE(power_ma, 0) / 1e9) as power_mas |
| -- FROM my_slice_power; |
| |
| SELECT RUN_METRIC('android/android_cpu_agg.sql'); |
| SELECT RUN_METRIC('android/power_profile_data.sql'); |
| |
| CREATE VIEW device AS |
| WITH |
| after_first_slash(str) AS ( |
| SELECT SUBSTR(str_value, INSTR(str_value, '/') + 1) |
| FROM metadata |
| WHERE name = 'android_build_fingerprint' |
| ), |
| before_second_slash(str) AS ( |
| SELECT SUBSTR(str, 0, INSTR(str, '/')) |
| FROM after_first_slash |
| ) |
| SELECT str AS name FROM before_second_slash; |
| |
| CREATE VIEW power_view AS |
| SELECT |
| cpu_freq_view.cpu AS cpu, |
| ts, |
| dur, |
| power AS power_ma |
| FROM cpu_freq_view |
| JOIN power_profile ON ( |
| power_profile.device = (SELECT name FROM device) |
| AND power_profile.cpu = cpu_freq_view.cpu |
| AND power_profile.freq = cpu_freq_view.freq_khz |
| ); |
| |
| CREATE VIRTUAL TABLE power_per_thread |
| USING SPAN_LEFT_JOIN(sched PARTITIONED cpu, power_view PARTITIONED cpu); |