Hello, all ...
I'm still learning libEvent, so maybe there is something I can do to
fix this. I've a very basic C++ server based on libEvent, and i'm
having the server stream 1 MPEG2 PS (6-8mbps) file to 1 client over
HTTP. The client is VLC. While this works, the CPU usage is very
high e.g. 90+% on both my PowerBook (running OSX 10.4.6) and a (much
faster) Debian Sarge box running on a 2.4ghz P4. This CPU usage is
the server only -- the VLC client is on another machine.
The program sits inside event_dispatch() and doesn't come out until
the client disconnects. Furthermore, if I use VLC to stream the same
file over RTP, it only uses 2-4% of the CPU, not 90+%.
I'm very new to libEvent, but is there something I can do to make the
CPU usage of my libEvent-based server more inline with what VLC
uses? If I do an strace (on Linux) or a ktrace (on OSX), I see the
same calls -- epoll_ctl(), a send() which returns EAGAIN (since I
made the socket non-blocking), and that's about it. Is there a call
I can make into libEvent before I call event_dispatch() that will
make libEvent not spin so heavily on the select() / kqueue / epoll()?
Regards,
John
Falling You - exploring the beauty of voice and sound
http://www.fallingyou.com
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