MemInfoReader.java revision b3af4ec6bae4fe93d40f021e54cbbce10cc7b4c6
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright (C) 2011 The Android Open Source Project 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Licensed under the Apache License, Version 2.0 (the "License"); 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * you may not use this file except in compliance with the License. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * You may obtain a copy of the License at 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * http://www.apache.org/licenses/LICENSE-2.0 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Unless required by applicable law or agreed to in writing, software 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * distributed under the License is distributed on an "AS IS" BASIS, 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * See the License for the specific language governing permissions and 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * limitations under the License. 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)package com.android.internal.util; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)import android.os.Debug; 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)import android.os.StrictMode; 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)public final class MemInfoReader { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) final long[] mInfos = new long[Debug.MEMINFO_COUNT]; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public void readMemInfo() { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Permit disk reads here, as /proc/meminfo isn't really "on 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // disk" and should be fast. TODO: make BlockGuard ignore 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // /proc/ and /sys/ files perhaps? 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads(); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) try { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Debug.getMemInfo(mInfos); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } finally { 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StrictMode.setThreadPolicy(savedPolicy); 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Total amount of RAM available to the kernel. 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getTotalSize() { 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_TOTAL] * 1024; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Amount of RAM that is not being used for anything. 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getFreeSize() { 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_FREE] * 1024; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Amount of RAM that the kernel is being used for caches, not counting caches 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * that are mapped in to processes. 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getCachedSize() { 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return getCachedSizeKb() * 1024; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Amount of RAM that is in use by the kernel for actual allocations. 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getKernelUsedSize() { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return getKernelUsedSizeKb() * 1024; 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Total amount of RAM available to the kernel. 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getTotalSizeKb() { 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_TOTAL]; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Amount of RAM that is not being used for anything. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getFreeSizeKb() { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_FREE]; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Amount of RAM that the kernel is being used for caches, not counting caches 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * that are mapped in to processes. 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getCachedSizeKb() { 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_BUFFERS] 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) + mInfos[Debug.MEMINFO_CACHED] - mInfos[Debug.MEMINFO_MAPPED]; 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /** 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Amount of RAM that is in use by the kernel for actual allocations. 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getKernelUsedSizeKb() { 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_SHMEM] + mInfos[Debug.MEMINFO_SLAB] 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) + mInfos[Debug.MEMINFO_VM_ALLOC_USED] + mInfos[Debug.MEMINFO_PAGE_TABLES] 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) + mInfos[Debug.MEMINFO_KERNEL_STACK]; 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getSwapTotalSizeKb() { 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_SWAP_TOTAL]; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getSwapFreeSizeKb() { 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_SWAP_FREE]; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public long getZramTotalSizeKb() { 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return mInfos[Debug.MEMINFO_ZRAM_TOTAL]; 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)