Typedef C++, couldn't resolve its meaning
- by metdos
I read this typedef line in a C++ book, but I couldn't resolve its meaning:
typedef Shape* (*CreateShapeCallBack)();
Now, CreateShapeCallBack stands for what, any idea?
Thanks.
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Concurrent processes do not utilize all available CPU
- by metdos
I run some processes on an EC2 cc2.8xlarge instance which has 32 virtual processors. For some type of processes, when I run 16 processes on parallel, all of them use 100% of CPU cycles. But for other type of processes, they are not using 100% CPU and they finish considerably slower than a single thread. There is no time spend on IO and all data is served from memory. Do you have any idea about the reason of this problem?Read the article
