>>>An instant later, more data arrives. How does libcurl find out? .. if
the application is using edge-triggered notifications (e.g., epoll() with
EPOLLET, or recent asio), the OS doesn't tell it that new data has arrived

This is wrong. I misread epoll's documentation. As long as we loop until we
receive EAGAIN, a subsequent call to epoll will again notify on the socket.

Yet the behavior I am seeing is a lack of notifications from epoll, causing
libcurl to wait forever to read more data on the socket.

Back to head-scratching...

--Daniel

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Received on 2015-04-23