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Windows启动过程 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...依赖这些驱动，下表列出了初始的系统驱:
然后再设置CPU的寄存器的值，等等。这些任务完成后，ntldr把系统控制权交给进程ntoskrnl.exe (NT OS Kernel),它的使命就完成了。
NTOSKRNL是主要负责启动以下OS服务（此时你能看到的Windows XP...
tinygrad：不到1000行代码的深度学习框架，天才黑客开源GitHub 2.3k+ stars...
...ad.tensor import Tensor(Tensor.ones(4,4).cuda() + Tensor.ones(4,4).cuda()).cpu()
其实我们当然不会用这样的框架来真正训练网络，但是1000行的代码量我们倒是可以稍微啃一下，对理解深度学习框架内部原理还是非常有帮助的，希望感兴趣的小伙...
How do I check which version of NumPy I'm using?
...t 13 2017, 12:02:49)
[GCC 7.2.0]
Platform: linux-x86_64
AMD/Intel CPU? True
VML available? False
Number of threads used by default: 8 (out of 48 detected cores)
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NVIDIA vs AMD: GPGPU performance
... same value ($) cards.
In both cases, speeds were ~10x-30x comparing to a CPU.
I didn't test CUDA, but I doubt it could solve my random memory fetch problems magically. Nowadays, CUDA and OpenCL are more or less the same, and I see more future on OpenCL than on CUDA. The main reason is that Intel ...
When is assembly faster than C?
... uint64_t for 32x32 => 64-bit multiplies fails to optimize on a 64-bit CPU, so you need intrinsics or __int128 for efficient code on 64-bit systems.
_umul128 on Windows 32 bits: MSVC doesn't always do a good job when multiplying 32-bit integers cast to 64, so intrinsics helped a lot.
C does...
How does Java handle integer underflows and overflows and how would you check for it?
...r absolute value than the computer can actually represent in memory on its CPU. So underflow does not apply to Java Integers. @BalusC
– Jingguo Yao
Oct 14 '18 at 15:10
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Image comparison - fast algorithm
... it would require an array of 1 million 64-bit hash values (8 MB). On some CPUs this fits in the L2/L3 cache! In practical usage I have seen a corei7 compare at over 1 Giga-hamm/sec, it is only a question of memory bandwidth to the CPU. A 1 Billion-image database is practical on a 64-bit CPU (8GB RA...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...ligible. It was devised in a time when servers had a tiny fraction of the CPU performance of today's computers.
Benefits of utf8mb4_unicode_ci over utf8mb4_general_ci
utf8mb4_unicode_ci, which uses the Unicode rules for sorting and comparison, employs a fairly complex algorithm for correct sortin...
asynchronous vs non-blocking
...ng (you can say that most of time this loop does something nonsense but in CPU's eyes, X is running, which means that X is non-blocking) whereas X and Y are synchronous because X can't continue to do any other things(X can't jump out of the loop) until it gets the book from Y.
Normally in this case,...
Microsecond timing in JavaScript
...lps me invalidate results that has probably been too adversely affected by CPU fluctuations).
It's become so accurate in some GPU accelerated browsers on i7 quad-core systems (when the browser window is the only window), that I've found I wished I could access a 0.1ms precision timer in JavaScript,...