profile_sdcard.sh revision d6079c62819b4c022fe23e5101ca5382fbedb10f 
1#!/bin/bash
2# Copyright 2009, The Android Open Source Project
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#     http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16# Run a bunch of test on the sdcard to establish a performance profile.
17
18print_kernel() {
19  adb shell cat /proc/version
20}
21print_sched_features() {
22  adb shell cat /sys/kernel/debug/sched_features
23}
24
25# Use dd to get the raw speed of the card
26block_level() {
27  true
28}
29
30# Time to run a test vs number of processes
31scalability() {
32  local file="/tmp/sdcard-scalability.txt"
33  rm -f ${file}
34  echo "# Scalability tests" | tee -a ${file}
35  echo "# Kernel: $(print_kernel)" | tee -a ${file}
36  echo "# Sched features: $(print_sched_features)" | tee -a ${file}
37  echo "# StopWatch scalability total/cumulative duration 0.0 Samples: 1" | tee -a ${file}
38  echo "# Process Time" | tee -a ${file}
39  for p in $(seq 1 8); do
40    adb shell sdcard_perf_test --test=write --procnb=${p} --size=1000 --chunk-size=100 --iterations=50 >/tmp/tmp-sdcard.txt
41    local t=$(grep 'write_total' /tmp/tmp-sdcard.txt | tail -n 1 | cut -f 6 -d ' ')
42    echo "$p $t" | tee -a ${file}
43  done
44
45}
46
47# Readers and writers should not starve each others.
48fairness() {
49  # Check readers finished before writers.
50  # Find the time of the last read op.
51  # Count how many writes and how many read happend
52  # during that period, do the ratio.
53  true
54}
55
56#######################################################################
57# MAIN
58
59echo "Make sure debugfs is mounted on the device."
60block_level
61scalability
62fairness
63
64
65