I found that under Linux a single threaded process such as one using
live555 only runs on one core of a multi-core CPU. My suggestion is to
run multiple processes if possible. This will let Linux distribute the
processes to the different cores.
- Brad
On Mar 11, 2009, at 6:31 AM, Marco Amadori wrote:
On Wednesday 11 March 2009, 10:28:25, liu yang wrote:
I plan to develop an application which may support 500+ or even 1000+
rtp session simultaneously. So anybody could tell me whether
livemedia
could support such load?
BTW, I did some test based on testWAV sample program. The result is
not satisfactory, frankly speaking.
On a bigger machine (dual xeon) with 6 raid5 15K SAS disks streaming
4mbits
MPEG2 ts I found that I could not stream more than 95 streams without
artifacts on screen.
My bold analisys (on a early 2008 release of livemedia) was that the
problem
wasn't IO bound but CPU bound (95%+). Also the network (400Mbps)
wasn't
problematic since we had tried both a single gigabit and a bonding
of 4
interfaces sawing both server and router side very little load.
But I just did a quick analisys, so I could be enterely wrong or
misleaded.
FAQ told me livemedia is a single threaded framework, which all
logics
are processed in single thread sequentially.
This could be a problem (a known one) in our case since multiple
Xeon cores
and CPUs was not used. Launching another session of
live555MediaServer helper
in adding another 95 streams to our tests.. so this could be a hint
for
looking for optimization interventions. Do some profiling and if some
computation effort is really needed, parallelize the code as
possible in
order to use multiples cores/CPUs.
So do you have any insightful thoughts of where we can optimize to
enhance livemeida as a high-performance rtp streaming stack which
could undergo heavy load.
This is of real interest to me too.
--
ESC:wq
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