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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...的glibc malloc版本。
ptmalloc原理
系统调用接口
上图是 x86_64 下 Linux 进程的默认地址空间, 对 heap 的操作, 操作系统提供了brk()系统调用，设置了Heap的上边界； 对 mmap 映射区域的操作,操作系 统 供了 mmap()和 munmap()函数。
因为系...
How to use the 'sweep' function
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85
sweep() is typically used when you operate a matrix by row or by column, and the other input of...
Declare a constant array
...stant.
The nearest you can get is:
var letter_goodness = [...]float32 {.0817, .0149, .0278, .0425, .1270, .0223, .0202, .0609, .0697, .0015, .0077, .0402, .0241, .0675, .0751, .0193, .0009, .0599, .0633, .0906, .0276, .0098, .0236, .0015, .0197, .0007 }
Note the [...] instead of []: it ensures y...
C++ compile error: has initializer but incomplete type
...
238
You need this include:
#include <sstream>
...
OSGi, Java Modularity and Jigsaw
... not guaranteed to have modularity (it slipped from Java 7, then from Java 8, and could easily slip again). Finally, the published requirements for JSR376 state that OSGi interop is required... so adopting OSGi remains a safe choice, and today the only practical choice.
– Neil ...
How to find a parent with a known class in jQuery?
...sSLaks
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How to output loop.counter in python jinja template?
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answered Aug 27 '12 at 18:08
sigisigi
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Linux: is there a read or recv from socket with timeout?
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edited Jan 22 '18 at 19:29
Quuxplusone
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What does @: (at symbol colon) mean in a Makefile?
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208
It means "don't echo this command on the output." So this rule is saying "execute the shell com...
How can I see the specific value of the sql_mode?
...rIke Walker
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