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Convert dmesg timestamp to custom date format
...el timestamps in dmesg are derived from an uptime value kept by individual CPUs. Over time this gets out of sync with the real time clock. As a result, the most accurate conversion for recent dmesg entries will be based on the CPU clock rather than /proc/uptime. For example, on a particular CentOS 6...
Heap vs Binary Search Tree (BST)
...ata
tested on Ubuntu 19.04, GCC 8.3.0 in a Lenovo ThinkPad P51 laptop with CPU: Intel Core i7-7820HQ CPU (4 cores / 8 threads, 2.90 GHz base, 8 MB cache), RAM: 2x Samsung M471A2K43BB1-CRC (2x 16GiB, 2400 Mbps), SSD: Samsung MZVLB512HAJQ-000L7 (512GB, 3,000 MB/s)
So clearly:
heap insert time is b...
How do you attach and detach from Docker's process?
...er exec -it 91262536f7c9 bash
root@91262536f7c9:/# ps -aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 18160 1908 ? Ss+ 04:03 0:00 /bin/bash
root 15 0.0 0.0 18164 1892 ? Ss 04:03 0:00 bash
root 28 0.0 0....
Thread vs ThreadPool
...than the main thread pool. If one has a lot of tasks to perform which are CPU intensive but won't block, it may be helpful to dispatch them using a pool of application threads (one per CPU core) which is separate from the "main" threadpool, since using more threads than cores will be counterprod
JavaScript, Node.js: is Array.forEach asynchronous?
...
technically, forEach isn't "blocking", as the CPU never goes to sleep. It's synchronous and CPU-bound, which can feel like "blocking" when you expect the node app to be responsive to events.
– Dave Dopson
Aug 2 '11 at 17:58
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What is a good regular expression to match a URL? [duplicate]
... a bit more info on the comment by @RubenMartinezJr. - it does max out the CPU on Chrome and Firefox (Mac OS), but interestingly does not max out the CPU on Safari.
– rinogo
Nov 9 '17 at 14:46
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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...
What is the difference between concurrent programming and parallel programming?
...O bound but not always, e.g. concurrent garbage collectors are entirely on-CPU. The pedagogical example of a concurrent program is a web crawler. This program initiates requests for web pages and accepts the responses concurrently as the results of the downloads become available, accumulating a set ...
Java's Virtual Machine and CLR
... VM's, with no notion of "registers" like we're used to seeing in a modern CPU like the x86 or PowerPC. The evaluation of all expressions ((1 + 1) / 2) is performed by pushing operands onto the "stack" and then popping those operands off the stack whenever an instruction (add, divide, etc) needs to ...
Effective method to hide email from spam bots
...is a billion-dollar business and the spammer's aren't even using their own CPU cycles to scrape the screens. In fact, they have already read this conversation and have adjusted their methods accordingly. Anything computer readable is going to be readable by the bots. Whether it be executed by CSS o...