[Freeswitch-users] Load test - performance not even matching Asterisk

Tue Oct 7 06:39:16 PDT 2008

are you doing anything with bypass_media?
We had another guy with something similar and we have not been able to nail
it down besides
he was doing a media call that shifted to bypass_media mode.

If you have a situation where it happens every time a pcap and or FS console
on debug of it happening would be nice.
It seems odd that the auto adjust code is being triggered considering the
design says that if the leg from FS1 -> C gets a packet
from some other ip than that of C that it adjusts to that.  So it would
appear that somehow one of the packets from FS2 to FS1
ends up being picked up by the rtp socket that was meant for the FS1->C
leg.  (maybe a race in the port allocator giving both legs the same rtp port
or something funny?)

say your phone is A

A -> FS1 (recv port 1000)
FS1->FS2 (recv port 1002)
FS2->C (recv port 1004)

either port 1004 is somehow getting the packet meant for 1002 which would
make no sense
or somewhere in here both boxes picked the same port or the packet is
somehow multicasting to both ports which would make no sense either.

I would like to figure it out though if you could provide the details
including the dp and all the attrs you set etc.

BTW, you can turn off RTP auto ADJ both with a channel varable and a profile
param (i forgot the name but it's on the wiki)

On Mon, Oct 6, 2008 at 9:25 PM, David Knell <dave at 3c.co.uk> wrote:

> Going back a step, to where Jon was seeing more packets than thereshould
> have been, I've just encountered a similar issue having upgraded
> to the latest, from what was probably a fairly old release - months old,
> rather than weeks.
>
> I've got two FS boxes (let's call them FS1 and FS2), each of which are
> plumbed in to carrier C.  There's an IVR service running on FS1; FS2
> bridges any calls which it gets for said IVR over to FS1.  What I've just
> had
> is:
> - calls from C to FS1 directly work fine;
> - calls from C to FS2, thence to FS1 were silent.  Looking at a capture
> from
> FS2, everything looks OK except the RTP between FS1 and FS2.  On answer,
> there's a prompt played.  What I see is three packets in a lump from FS1,
> then
> four packets sent back from FS2 to FS1, four packets in a lump from FS1,
> then
> five going back from FS2 to FS1, and so on.
>
> The lumps are 20ms apart (codec is G711 with 20ms packets) - what seems to
> be
> happening is that FS2 sends FS1 back the packets received from it unchanged
> plus an extra packet which has arrived from C in the meantime.
>
> FS2 ought to be sending these packets to C instead; it sends C nothing.
>
> I've made the problem go away by commenting out the bit in switch_rtp.c
> which
> auto-adjusts addresses (around line 1280.)
>
> All of the machines have public IPs; there's not a NAT in sight.
>
> I'll have a further look in the morning.
>
> --Dave
>
>
> %(60000,0,300) means to generate a 60 second long 300hz tone
> %(5,0,300) means a 5 ms long 300hz tone
>
> if you are just trying to send a tone you are better off with
> <action application="gentones" data="%(1000,0,300)|60"/>
>
> which only generates 1 second of audio then buffers and loops it via the
> application
> rather than allocating enough room for 60 seconds of signed linear audio
> and generating
> the whole 60 seconds into memory for no reason vs 1 second sample looped 60
> times.
>
> No matter what you do it will not effect the bandwidth used, it's a factor
> of what codec you are using.
>
>
> On Mon, Oct 6, 2008 at 4:15 AM, Jon Bruel <jbr at consiglia.dk> wrote:
>
>> Resolved: I have made further tests, and my final conclusion is that the
>> previous stated test results were screwed by the application 'gentones'.
>> This application does in some cases send more rtp than expected. If I
>> used:
>> <action application="gentones" data="%(5,0,300)"/>
>> <action application="gentones" data="%(5,0,300)"/>
>> <action application="gentones" data="%(60000,0,300)"/>
>> the expected rtp of 8600 kB/s was transmitted. If I used
>> <action application="gentones" data="%(60000,0,300)"/>
>> <action application="gentones" data="%(5,0,300)"/>
>> <action application="gentones" data="%(5,0,300)"/>.
>> the rtp was 34600 kB/s, and the memory is heavily consumed. The only
>> difference being the sequence of the gentones commands. I don't know if
>> this is the expected behaviour of 'gentones' or not, but it certainly
>> screwed up the results previously posted. /Jon
>>
>>
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>
>
>
> --
> Anthony Minessale II
>
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-- 
Anthony Minessale II

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