Messages in this thread | | | Date | Thu, 29 Mar 2012 18:32:22 +0200 | From | Hagen Paul Pfeifer <> | Subject | Re: [PATCH Resend] epoll: add EPOLLEXCLUSIVE support |
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* Jason Baron | 2012-03-29 11:53:24 [-0400]:
>I was trying to better understand the use-case, since at least for the >test case you posted, 'EPOLLET', already does what you want. > >Also, the 'EPOLLEXCLUSIVE' flag in your patch addresses multiple threads >blocking on *different* epoll fds. However, if multiple threads are >blocked on a single epoll fd, they will all be woken even if 'EPOLLEXCLUSIVE' >is set. Shouldn't 'EPOLLEXCLUSIVE' affect that case too?
Hey Jason,
I just wanted to address the "main use-case" (as implemented in a bunch of network server): one listen socket (say 80) is created and a epoll fd is created. The listen socket is added to the set and n threads are created afterwards. So now you have the situation that one listening socket is added to the set and all threads are awoken if a new client connects. This patch reduce the useless-all-thread-awoken-overhead by awake only one thread.
Hagen
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