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How can I pair socks from a pile efficiently?
... independent. This scheme scales to arbitrary amounts of data and multiple CPUs linearly.
You don't need recursive partitioning if you can find a distribution key (hash key) that provides enough buckets that each bucket is small enough to be processed very quickly. Unfortunately, I don't think sock...
Most Useful Attributes [closed]
... Be careful with this, it bites much bigger chunk out of your CPU than ToString.
– Nikola Radosavljević
Nov 22 '11 at 0:42
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Is SHA-1 secure for password storage?
...t bigger, because storage cost is reduced. The bottleneck on N becomes the CPU power that the attacker can muster, not the size of his harddisks.
If N is large enough that the CPU-cost of hashing N passwords is ludicrous, then such an attack is not feasible, regardless of whether rainbow tables ar...
Why does pthread_cond_wait have spurious wakeups?
... The thread is doing whatever it does with the element it acquired on some CPU.
Thread 2 attempts to dequeue an element, but finds the queue to be empty when checked under the mutex, calls pthread_cond_wait, and blocks in the call awaiting signal/broadcast.
Thread 3 obtains the mutex, inserts a new ...
What RSA key length should I use for my SSL certificates?
...cated because they could be cracked given a small datacenter (thousands of CPU or hundreds of GPU, in maybe a few months). It may seem a lot but it was well within reach of any large organization or government.
2048 bits
2048 bits RSA certificates are currently the accepted norm in use.
Default ...
How do I launch the Android emulator from the command line?
...y won't work. I got error PANIC: Missing emulator engine program for 'x86' CPU.. (I'm on Linux, OpenSUSE.) After I navigated to tools and then just ran emulator -avd "{name}" - then it worked.
– pesho hristov
May 21 at 9:41
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What is the behavior of integer division?
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Truncation is how most common CPU hardware (e.g. x86) behaves, so it would be crazy to make a different choice. IDK which came first, Fortran semantics or hardware behaviour, but it's not a coincidence that those are the same, too.
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How do I get Windows to go as fast as Linux for compiling C++?
...d the "/m" switch, and it will automatically start one copy of MSBuild per CPU core.
Put your files on an SSD -- helps hugely for random I/O.
If your average file size is much greater than 4KB, consider rebuilding the filesystem with a larger cluster size that corresponds roughly to your average fil...
Linux 进程卡住了怎么办？ - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...rocess在我们使用 Linux 系统时，如果网络或者磁盘等 I O 出问题，会发现进程卡住了，即使用 kill -9 也无法杀掉进程，很多常用的调试工具，比如 strace, pstack 等也都失灵了
在我们使用 Linux 系统时，如果网络或者磁盘等 I/O 出...
Is recursion ever faster than looping?
... sub, mul, div. e.g. add m[7] m[8]
An Executing Agent: a core in a modern CPU. An "agent" is something that can execute instructions. An Agent can also be a person following the algorithm on paper.
Order of steps: a sequence of instructions: i.e.: do this first, do this after, etc. An imperative se...