异常
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 402653184 bytes for Failed to commit area from 0x0000000641e00000 to 0x0000000659e00000 of length 402653184.
# An error rep…
一、输入与输出
1. 对于操作系统来讲,控制各种输入输出设备是一件复杂的事情,因为这么多设备,形状、用法、功能都不一样。因此,CPU并不直接和设备打交道,它们中间有一个叫作设备控制器(Device Control Uni…