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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...ide of a jump instruction. This can be a big win, if the prediction is correct it means that the jump instruction is basically free and will take zero cycles. On the other hand if the prediction is wrong, then it means the processor pipeline needs to be flushed and it can cost several cycles. So lon...
“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...，而只需要几天甚至几小时。我在Amazon.com上进行了如下搜索：
pubdate: after 1992 and title: days and (title: learn or title: teach yourself)
(出版日期：1992年后 and 书名：天 and （书名：学会 or 书名：无师自通）)
我一共得到了248个搜索...
What is the difference between Amazon SNS and Amazon SQS?
...s to SNS.
SQS is distributed queuing system. Messages are NOT pushed to receivers. Receivers have to poll or pull messages from SQS. Messages can't be received by multiple receivers at the same time. Any one receiver can receive a message, process and delete it. Other receivers do not receive the ...
Vsphere 6 集群上 安装 oracle rac 遇到的共享磁盘故障 - 数据库(内核) - ...
...示 不能访问物理存储
第一次死机
对比互联网上搜索到的方法对比 发现SCSI总线不一样。
参考文档http://www.doc88.com/p-5416264066182.html
按照网上的方法，修改SCSI 控制1的总线为LSI Logic 并行。修改好后，开启虚拟机的电源...
Change the Target Framework for all my projects in a Visual Studio Solution
I need to change the target framework for all projects. I have many solutions with hundreds of projects.
10 Answers
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How to link godaddy domain with AWS Elastic Beanstalk environment?
...tic Beanstalk instance . I found a lot of documentation on how to link an EC2 instance with a domain on Godaddy but not for Elastic Beanstalk instance. So I ended up with this URL: www.MY_SITE.elasticbeanstalk.com
...
dd: How to calculate optimal blocksize? [closed]
...es and time that. (Remember to clear kernel buffer caches before each run: echo 3 > /proc/sys/vm/drop_caches).
However, as a rule of thumb, I've found that a large enough block size lets dd do a good job, and the differences between, say, 64 KiB and 1 MiB are minor, compared to 4 KiB versus 64 K...
How can I generate UUID in C#
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answered Dec 12 '11 at 16:45
TudorTudor
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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...据交换。ATT层： 对数据主机或客机传入的指令进行指令搜索处理，GATT层： 接收和处理主机或客机的指令信息，并将指令打包成合适的profile。GAP层： 向上提供API，向下合理分配各个层工作。
0x31 Physical Layer任何一个通信系统，...
What is the ultimate postal code and zip regex?
...retically) is create a seperate regex for every country in the world, not recommendable IMO. But you would still be missing on the validation part: Zip code 12345 may exist, but 12346 not, maybe 12344 doesn't exist either. How do you check for that with a regex?
You can't.
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