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Apache Spark: The number of cores vs. the number of executors
...acities,
yarn.nodemanager.resource.memory-mb and
yarn.nodemanager.resource.cpu-vcores, should probably be set to 63 *
1024 = 64512 (megabytes) and 15 respectively. We avoid allocating 100%
of the resources to YARN containers because the node needs some
resources to run the OS and Hadoop daemons. In ...
Compiling with g++ using multiple cores
...ge projects quicker (for example 4 source files at a time for a multi-core CPU)?
8 Answers
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Volatile vs. Interlocked vs. lock
...at all. The point of volatile is that multiple threads running on multiple CPUs can and will cache data and re-order instructions.
If it is not volatile, and CPU A increments a value, then CPU B may not actually see that incremented value until some time later, which may cause problems.
If it is vol...
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）
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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
低效程序员的7个坏习惯 - 创意 - 清泛网 - 专注C/C++及内核技术
...le的Charles解释道，“低效的工程师会错误地表征用户体验问题为其他人的问题。”
遗憾的是，似乎很多软件工程师都持有这种态度，这也是为什么企业要寻求能够移情和了解他人问题的代码战士。 “雇主正在竭力寻找那些拥有...
Generating a unique machine id
...FirmwareTables and GetSystemFirmwareTable.
IIRC, the "unique id" from the CPUID instruction is deprecated from P3 and newer.
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c++ volatile关键字简析 - C/C++ - 清泛网 - 专注C/C++及内核技术
c++ volatile关键字简析volatile防范冲突，提高效率。降低CPU Cache Line锁冲突的几率。不同于普通变量在于：CPU缓存中有值的话，也得从内存中重新加载到缓存（普通变量不会）；即认为寄存器值不可靠， volatile 防范冲突，提高效...
C++字符串截断时中文的处理问题（中文被截断怎么处理？） - c++1y / stl - ...
// 防止后台错误消息中汉字双字节被截断出现乱码
if (pRspMsg->RspMsg.buf[pRspMsg->RspMsg.Length() - 2] & 0x80)
pRspMsg->RspMsg.buf[pRspMsg->RspMsg.Length() - 2] = 0;
一个字节和0x80与运算（& 0x80 ）是否...
Echarts透明背景及兼容问题 - 用户反馈 - 清泛IT社区，为创新赋能！
用户反馈wxbit导入失败：高德地图，启动画面等导致。
Echart是自己导入及实现的，背景透明没有效果，最终WebViewPlus拓展解决了。
方法一:
var option={
backgroundColor:'rgba(128, 128, 128, 0.1)' //rgba设置透明度0.1
}
方法二:
va...
How efficient can Meteor be while sharing a huge collection among many clients?
...onnection to its
client and updates its server-side in-memory copy.
Total CPU cost is the cost to diff one Mongo query, plus the cost of
1,000 merge boxes checking their clients' state and constructing a new
DDP message payload. The only data that flows over the wire is a single
JSON object sent t...