[Android]GC work way on Android 4.2.2

時間 2019-11-24

標籤 android work way 4.2.2 欄目 Android 简体版

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聽說,Gingerbread以前, Android GC採用stop-the-world的方式來作垃圾收集，花費時間在100ms左右，而在Gingerbread及以後，GC採用concurrent的方式來作垃圾收集，花費時間較短，在10ms左右。下面是GC 的log，能夠看出，確實是用了concurrent的垃圾收集方式。sed

dalvikvm: GC_CONCURRENT freed 388K, 8% free 6551K/7111K, paused 19ms+2ms, total 45mstop

dalvikvm: GC_CONCURRENT freed 137K, 5% free 6949K/7239K, paused 20ms+3ms, total 53ms時間

dalvikvm: WAIT_FOR_CONCURRENT_GC blocked 15msvi

dalvikvm: GC_CONCURRENT freed 276K, 6% free 7184K/7623K, paused 17ms+2ms, total 46msco

dalvikvm: WAIT_FOR_CONCURRENT_GC blocked 13msblock

dalvikvm: GC_FOR_ALLOC freed 120K, 6% free 7311K/7751K, paused 21ms, total 21ms垃圾收集

dalvikvm: GC_CONCURRENT freed 381K, 9% free 7367K/8007K, paused 13ms+1ms, total 36ms

dalvikvm: WAIT_FOR_CONCURRENT_GC blocked 22ms

dalvikvm: GC_FOR_ALLOC freed 117K, 7% free 7487K/8007K, paused 23ms, total 24ms

dalvikvm: GC_CONCURRENT freed 614K, 10% free 8030K/8903K, paused 25ms+4ms, total 59ms

dalvikvm: GC_CONCURRENT freed 430K, 7% free 8315K/8903K, paused 18ms+14ms, total 78ms

dalvikvm: WAIT_FOR_CONCURRENT_GC blocked 2ms

dalvikvm: GC_CONCURRENT freed 185K, 4% free 8954K/9287K, paused 14ms+3ms, total 70ms

dalvikvm: WAIT_FOR_CONCURRENT_GC blocked 18ms

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