Symptoms:
1) 100% loaded one cpu core (one rtpreceiver thread configured)
2) rtp processing stopped(non empty receive queue on rtp sockets)
netstat output:
http://pastebin.com/embed_iframe.php?i=Y1d1Pu8i
Examining in GDB:
gdb log with comments:
http://pastebin.com/embed_iframe.php?i=fU4c9p4Q
so, we have strange infinite loop in PacketMem::newPacket()
(AmRtpStream.cpp)
this situation may be caused when count of used entries differ from
n_used
this can happen only when freePacket() called twice for(after) same
newPacket()
see code:
inline void PacketMem::freePacket(AmRtpPacket* p)
{
if (!p) return;
used[p-packets] = false;
n_used--;
}
if used[p-packets] already false then n_used become less than real
used_entries.
to check this theory I change code of freePacket:
inline void PacketMem::freePacket(AmRtpPacket* p)
{
if (!p) return;
int idx = p-packets;
if(used[idx]){
used[idx] = false;
n_used--;
} else {
DBG("freePacket() free already empty entry n_used = %d, idx =
%d",n_used,idx);
}
}
and got following in syslog:
sems[11753]: [/usr/src/sems/core/AmRtpStream.cpp:1159] DEBUG:
freePacket() free already empty entry n_used = 0, idx = 0
and many similar lines with n_used = 0 and different idx
after this little patch infinite loop no longer happens
I think that must to be found place where freePacket() called secondly
or apply my patch.
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