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TCP 的那些事儿(下) - 更多技术 - 清泛网 - 专注C/C++及内核技术

... 算法 但是上面的这个算法在重传的时候会出有一个终极问题——你是用第一次发数据的时间和ack回来的时间做RTT样本值,还是用重传的时间和ACK回来的时间做RTT样本值? 这个问题无论你选那头都是按下葫芦起了瓢。 如下图所...
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asynchronous vs non-blocking

...g whether given condition holds (socket is readable, device has more data, etc.) share | improve this answer | follow | ...
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How is the fork/join framework better than a thread pool?

...f thread pools and Fork/Join are alike: Both want to utilize the available CPU power the best they can for maximum throughput. Maximum throughput means that as many tasks as possible should be completed in a long period of time. What is needed to do that? (For the following we will assume that there...
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How can I build a small operating system on an old desktop computer? [closed]

...iles and devices, reading and writing, passing messages between processes, etc. Read up on x86 assembly (assuming you are designing this for an x86 machine). That should answer a lot of your questions with regards to moving between processor operating modes. If you've got any electronics knowledg...
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初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...务器不仅浪费了内存,而且还必须自己维护数据的不一致问题,有了Memcached插件,这些问题都不存在了,而且借助MySQL本身的复制功能,我们可以说是变相的实现了Memcached的复制,这更是意外之喜。 安装 为了让文章更具完整性...
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How dangerous is it to access an array out of bounds?

...isk), possibly bringing down the entire system. A lot of malware (viruses, etc.) exploits buffer overruns to gain unauthorized access to the system. (One historical example: I've heard that on some old systems with core memory, repeatedly accessing a single memory location in a tight loop could li...
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Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...的时候已经想到要实现与POSIX(UNIX 的国际标准)的兼容问题了。   Linux 操作系统的诞生   1981 年IBM 公司推出享誉全球的微型计算机IBM PC。在1981-1991 年间,MS-DOS 操作系统一直是微型计算机上操作系统的主宰。此时计算机...
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Scanner vs. StringTokenizer vs. String.Split

... faster than any of two viz. StringTokenizer or String.split. But the CPU utilization for all the three is nearly the same. So we also need a method which is less CPU intensive, which I am still not able to find. share...
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Under what circumstances are linked lists useful?

...od solutions to the problems here reported (eg: SkipLists, Dynamic Arrays, etc...). In this answer I've taken into account the basic data structure every programmer should know about. share | improv...
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代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

...不好恢复老版本不验证了) -------- 怀疑 kawa Scheme 生成问题,更新新版本试试。(也不容易更新) https://community.appinventor.mi ... or-d8-failed/141334