The first step towards great performance is to get real hardware. You will never come close to the performance when running inside a VM.

/Peter


2013/6/20 Vincent Xia <gmangudai@gmail.com>
exactly, im doing the test on a virtual box, double the CPU from quad-core to oct-core, the test scenario is simple, making calls at a speed of 28calls per sec, play sound file at PCMU codec for 150 sec after connected, then hangup and repeat.

i've heard people stress tests FS with over 2000 concurrent calls, so i think there should be some way i can make my FS box more powerful, but things seem not gonna be easy to do.


2013/6/20 Anthony Minessale <anthony.minessale@gmail.com>
Doubled it so quick? Does that mean its a virtual or real box?
The distro, the hardware, the speed of the network, the configuration, the filesystem all matter in performance.
There is no mention to what the test is or what the frequency of calls is etc.  Short duration calls hurt more than long etc.

This is part of why we tend to shy away from load testing questions.  



On Wed, Jun 19, 2013 at 11:59 PM, S. Scott <8f27e956@gmail.com> wrote:
Vincent,

I concur with quality lan card advice, namely intel. Also, what is
your system's "clocksource0" -- both available and current.

Cheers,

—————
iThing:  Big thumbs & little keys. Please excuse typo, spelling and
grammar errors • Thought of the Day – "With all this manure, there
must be a pony in here somewhere.”

On 2013-06-19, at 23:35, William King <william.king@quentustech.com> wrote:

> Vincent,
>
> What network card hardware are you using? UDP packets on cheap
> networking cards are very sensitive to a lack of idle cpu time. I've
> seen many models of RealTek cards that will start dropping over 10% of
> all UDP packets if your CPU idle drops below ~50%. In my experience
> server grade Intel network cards are much better, but even these will
> start dropping ~5-10% of UDP packets if your CPU idle gets below 15%.
>
> Also do these calls have the media going through this box? or through an
> external media gateway?
>
> William King
> Senior Engineer
> Quentus Technologies, INC
> 1037 NE 65th St Suite 273
> Seattle, WA 98115
> Main:   (877) 211-9337
> Office: (206) 388-4772
> Cell:   (253) 686-5518
> william.king@quentustech.com
>
> On 06/19/2013 07:55 PM, Vincent Xia wrote:
>> I've doubled CPU capability, now the CPU usage at 1000 calls is around
>> 50%, but call loss is still 10-20%, maybe Brian is right, don't try more
>> than 500 calls.
>>
>>
>> 2013/6/19 Alex Lake <alex@digitalmail.com <mailto:alex@digitalmail.com>>
>>
>>    If your CPU is averaging around 80-90%, I would consider that maxed out!
>>    Can you try it on a more powerful machine?
>>>    while i was doing stress test over FS, things look pretty good as
>>>    FS is able to hold 800 concurrent calls with a call loss rate at
>>>    around 0.1%, when leveling up to 1000 concurrent calls, the call
>>>    loss soars to 10-20%, i made some modification to switch.conf like
>>>
>>>    <param name="max-sessions" value="2000"/>
>>>    <param name="sessions-per-second" value="100"/>
>>>
>>>    but things didn't get any better, the host CPU usage rate is
>>>    around 80-90%, memory usage: 10%, network load 10%, so i think
>>>    there should be someway we can make FS handle more concurrent
>>>    calls, any ideas?
>>>
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