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Optimize epoll to never modify the epoll mask unless it actually changed.

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This commit is contained in:
Jan Vidar Krey 2010-01-23 00:03:45 +01:00
parent 84bd2591d6
commit b2e7a2848f
1 changed files with 7 additions and 3 deletions
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10
src/network/epoll.c
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@ -186,10 +186,14 @@ void net_con_reinitialize(struct net_connection* con, net_connection_cb callback
void net_con_update(struct net_connection* con_, int events) void net_con_update(struct net_connection* con_, int events)
{ {
struct net_connection_epoll* con = (struct net_connection_epoll*) con_; struct net_connection_epoll* con = (struct net_connection_epoll*) con_;
con->ev.events = 0; int newev = 0;
if (events & NET_EVENT_READ) con->ev.events |= EPOLLIN; if (events & NET_EVENT_READ) newev |= EPOLLIN;
if (events & NET_EVENT_WRITE) con->ev.events |= EPOLLOUT; if (events & NET_EVENT_WRITE) newev |= EPOLLOUT;
if (newev == con->ev.events)
return;
con->ev.events = newev;
if (epoll_ctl(g_backend->epfd, EPOLL_CTL_MOD, con->sd, &con->ev) == -1) if (epoll_ctl(g_backend->epfd, EPOLL_CTL_MOD, con->sd, &con->ev) == -1)
{ {
LOG_TRACE("epoll_ctl() modify failed."); LOG_TRACE("epoll_ctl() modify failed.");