Add cpuinfo log collector to AUPT

Change-Id: I1daa01a9d1312c7356667ca80909487b9ce5df5c

src/com/android/loganalysis/item/CpuInfoItem.java

+/*
+ * Copyright (C) 2015 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.
+ */
+package com.android.loganalysis.item;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * An {@link IItem} used to cpuinfo.
+ */
+public class CpuInfoItem implements IItem {
+    /** Constant for JSON output */
+    public static final String PROCESSES_KEY = "processes";
+    /** Constant for JSON output */
+    public static final String PID_KEY = "pid";
+    /** Constant for JSON output */
+    public static final String PERCENT_KEY = "percent";
+    /** Constant for JSON output */
+    public static final String NAME_KEY = "name";
+
+    private Map<Integer, Row> mRows = new HashMap<Integer, Row>();
+
+    private static class Row {
+        public double percent;
+        public String name;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public IItem merge(IItem other) throws ConflictingItemException {
+        throw new ConflictingItemException("CpuInfo items cannot be merged");
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean isConsistent(IItem other) {
+        return false;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public JSONObject toJson() {
+        JSONObject object = new JSONObject();
+        JSONArray processes = new JSONArray();
+        for (int pid : getPids()) {
+            JSONObject proc = new JSONObject();
+            try {
+                proc.put(PID_KEY, pid);
+                proc.put(PERCENT_KEY, getPercent(pid));
+                proc.put(NAME_KEY, getName(pid));
+                processes.put(proc);
+            } catch (JSONException e) {
+                // ignore
+            }
+        }
+
+        try {
+            object.put(PROCESSES_KEY, processes);
+        } catch (JSONException e) {
+            // ignore
+        }
+        return object;
+    }
+
+    /**
+     * Get a set of PIDs seen in the cpuinfo output.
+     */
+    public Set<Integer> getPids() {
+        return mRows.keySet();
+    }
+
+    /**
+     * Add a row from the cpuinfo output to the {@link CpuInfoItem}.
+     *
+     * @param pid The PID from the output
+     * @param percent The percentage of CPU usage by the process
+     * @param name The process name
+     */
+    public void addRow(int pid, double percent, String name) {
+        Row row = new Row();
+        row.percent = percent;
+        row.name = name;
+        mRows.put(pid, row);
+    }
+
+    /**
+     * Get the percentage of CPU usage by a given PID.
+     */
+    public double getPercent(int pid) {
+        return mRows.get(pid).percent;
+    }
+
+    /**
+     * Get the process name for a given PID.
+     */
+    public String getName(int pid) {
+        return mRows.get(pid).name;
+    }
+}

src/com/android/loganalysis/parser/CpuInfoParser.java

+/*
+ * Copyright (C) 2015 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.
+ */
+package com.android.loganalysis.parser;
+
+import com.android.loganalysis.item.CpuInfoItem;
+
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * A {@link IParser} to handle the output of {@code cpuinfo}.
+ */
+public class CpuInfoParser implements IParser {
+
+    // Example:
+    //  0.1% 170/surfaceflinger: 0% user + 0% kernel
+    private static final Pattern USAGE_PREFIX = Pattern.compile(
+            "^ *\\+?(\\d+\\.?\\d*)\\% (\\d+)/([^ ]+): ");
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public CpuInfoItem parse(List<String> lines) {
+        CpuInfoItem item = new CpuInfoItem();
+        for (String line : lines) {
+            Matcher m = USAGE_PREFIX.matcher(line);
+            if (!m.lookingAt()) continue;
+
+            if (m.groupCount() != 3) continue;
+
+            int pid = Integer.parseInt(m.group(2));
+            double percent = Double.parseDouble(m.group(1));
+            String name = m.group(3);
+            item.addRow(pid, percent, name);
+        }
+
+        return item;
+    }
+}

tests/src/com/android/loganalysis/parser/CpuInfoParserTest.java

+/*
+ * Copyright (C) 2015 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.
+ */
+package com.android.loganalysis.parser;
+
+import com.android.loganalysis.item.CpuInfoItem;
+
+import junit.framework.TestCase;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class CpuInfoParserTest extends TestCase {
+
+    public void testSingleLine() {
+        List<String> input = Arrays.asList("  0.1% 170/surfaceflinger: 0% user + 0% kernel");
+
+        CpuInfoItem item = new CpuInfoParser().parse(input);
+
+        assertEquals(1, item.getPids().size());
+        assertEquals("surfaceflinger", item.getName(170));
+        assertEquals(0.1, item.getPercent(170), 0.0001);
+    }
+
+    public void testMultipleLines() {
+        List<String> input = Arrays.asList(
+                "CPU usage from 35935ms to 26370ms ago:",
+                "  57% 489/system_server: 37% user + 20% kernel / faults: 39754 minor 57 major",
+                "  34% 853/com.google.android.leanbacklauncher: 30% user + 4.6% kernel / faults: 7838 minor 14 major",
+                "  15% 19463/com.google.android.videos: 11% user + 3.3% kernel / faults: 21603 minor 141 major",
+                "  8.2% 170/surfaceflinger: 3.4% user + 4.8% kernel / faults: 1 minor");
+        CpuInfoItem item = new CpuInfoParser().parse(input);
+
+        assertEquals(4, item.getPids().size());
+        assertEquals("system_server", item.getName(489));
+        assertEquals(57.0, item.getPercent(489), 0.0001);
+        assertEquals("surfaceflinger", item.getName(170));
+        assertEquals(8.2, item.getPercent(170), 0.0001);
+    }
+
+}
+