.涓?銆佸埄鐢ˋndroid API鍑芥暟鏌ョ湅
1.1 ActivityManager鏌ョ湅鍙?敤鍐呭瓨銆?br>ActivityManager.MemoryInfo outInfo = new ActivityManager.MemoryInfo();聽
am.getMemoryInfo(outInfo);聽
outInfo.availMem鍗充负鍙?敤绌洪棽鍐呭瓨銆?br>1.2銆乤ndroid.os.Debug鏌ヨ?PSS锛孷SS锛孶SS绛夊崟涓?繘绋嬩娇鐢ㄥ唴瀛樹俊鎭?br>MemoryInfo[] memoryInfoArray = am.getProcessMemoryInfo(pids);聽
MemoryInfo pidMemoryInfo=memoryInfoArray[0];
pidMemoryInfo.getTotalPrivateDirty();
getTotalPrivateDirty()
Return total private dirty memory usage in kB. USS
getTotalPss()
Return total PSS memory usage in kB.
PSS
getTotalSharedDirty()
Return total shared dirty memory usage in kB. RSS
浜屻?佺洿鎺ュ?Android鏂囦欢杩涜?瑙ｆ瀽鏌ヨ?锛?br>/proc/cpuinfo绯荤粺CPU鐨勭被鍨嬬瓑澶氱?淇℃伅銆?br>/proc/meminfo 绯荤粺鍐呭瓨浣跨敤淇℃伅
濡?br>/proc/meminfo
MemTotal: 16344972 kB
MemFree: 13634064 kB
Buffers: 3656 kB
Cached: 1195708 kB
鎴戜滑鏌ョ湅鏈哄櫒鍐呭瓨鏃讹紝浼氬彂鐜癕emFree鐨勫?煎緢灏忋?傝繖涓昏?鏄?洜涓猴紝鍦╨inux涓?湁杩欎箞涓?绉嶆?濇兂锛屽唴瀛樹笉鐢ㄧ櫧涓嶇敤锛屽洜姝ゅ畠灏藉彲鑳界殑cache鍜宐uffer涓?浜涙暟鎹?紝浠ユ柟渚夸笅娆′娇鐢ㄣ?備絾瀹為檯涓婅繖浜涘唴瀛樹篃鏄?彲浠ョ珛鍒绘嬁鏉ヤ娇鐢ㄧ殑銆?br>鎵?浠?绌洪棽鍐呭瓨=free+buffers+cached=total-used
閫氳繃璇诲彇鏂囦欢/proc/meminfo鐨勪俊鎭?幏鍙朚emory鐨勬?婚噺銆?br>ActivityManager. getMemoryInfo(ActivityManager.MemoryInfo)鑾峰彇褰撳墠鐨勫彲鐢∕emory閲忋??/p>
聽
涓夈?侀?氳繃Android绯荤粺鎻愪緵鐨凴untime绫伙紝鎵ц?adb 鍛戒护(top,procrank,ps...绛夊懡浠?鏌ヨ?
閫氳繃瀵规墽琛岀粨鏋滅殑鏍囧噯鎺у埗鍙拌緭鍑鸿繘琛岃В鏋愩?傝繖鏍峰ぇ澶х殑鎵╁睍浜咥ndroid鏌ヨ?鍔熻兘.渚嬪?锛?br>final Process m_process = Runtime.getRuntime().exec("/system/bin/top -n 1");
final StringBuilder sbread = new StringBuilder();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(m_process.getInputStream()), 8192);
# procrank
Runtime.getRuntime().exec("/system/xbin/procrank");
鍐呭瓨鑰楃敤锛歏SS/RSS/PSS/USS
Terms
鈥?VSS - Virtual Set Size 铏氭嫙鑰楃敤鍐呭瓨锛堝寘鍚?叡浜?簱鍗犵敤鐨勫唴瀛橈級
鈥?RSS - Resident Set Size 瀹為檯浣跨敤鐗╃悊鍐呭瓨锛堝寘鍚?叡浜?簱鍗犵敤鐨勫唴瀛橈級
鈥?PSS - Proportional Set Size 瀹為檯浣跨敤鐨勭墿鐞嗗唴瀛橈紙姣斾緥鍒嗛厤鍏变韩搴撳崰鐢ㄧ殑鍐呭瓨锛?br>鈥?USS - Unique Set Size 杩涚▼鐙?嚜鍗犵敤鐨勭墿鐞嗗唴瀛橈紙涓嶅寘鍚?叡浜?簱鍗犵敤鐨勫唴瀛橈級
涓?鑸?潵璇村唴瀛樺崰鐢ㄥぇ灏忔湁濡備笅瑙勫緥锛歏SS >= RSS >= PSS >= USS
USS is the total private memory for a process, i.e. that memory that is completely unique to that process.USS is an extremely useful number because it indicates the true incremental cost of running a particular process. When a process is killed, the USS is the total memory that is actually returned to the system. USS is the best number to watch when initially suspicious of memory leaks in a process.