[Freeswitch-users] AMD

Wed Feb 17 00:03:59 MSK 2016

Running one huge conference is actually part of the reason that I want to
go with a huge box, but your input is actually very informative as I do
intend to use multiple instance of freeswitch (using proxmox / lxc) yet
still have the ability on occasion to allocate lots of CPU to a single
instance.
You're right that multiple smaller machines will probably win in
price/performance, colo space is also a factor.
Thanks Anthony and MIchael for all the info. once I have server up and
running I will try to test the limits and report back.

On Tue, Feb 16, 2016 at 3:47 PM, Michael Giagnocavo <mgg at giagnocavo.net>
wrote:

> If you’re actually doing one huge conference so you need all calls into a
> single FS instance, ignore this message.
>
>
>
> I might be a broken record on this topic, but seriously consider running
> multiple FreeSWITCH instances and setting affinity to specific sockets or
> even groups of cores. I’d be surprised to hear a quad-socket system is
> price/perf competitive with multiple smaller boxes.
>
>
>
> At a minimum, you want to partition on NUMA nodes, otherwise every single
> memory access needs to jump through other processors. For instance, if CPU0
> wants memory that’s connected to CPU3, it needs to request it via CPU1 then
> CPU3. This is slow (a single hop introduces a ~40% penalty). After that,
> anytime threads are writing to the same part of memory, CPUs have to take
> ownership from each other’s caches. This can be as expensive as going to
> main memory (thus being as slow as having no cache) and kill perf.
>
>
>
> Presumably with enough media load, you’d want to look into how your NIC is
> delivering packets, and distribute that accordingly.
>
>
>
> On Xeon 5500 series (a while ago, on FS 1.2) we didn’t notice any real
> impact of hyperthreading either way. But keeping FS partitioned on groups
> of 4 threads (2 cores) seemed to be the best performing option. The
> increase in stability was very marked (versus one FS process across 2x
> Xeons, 16 threads).
>
>
>
> -Michael
>
>
>
> *From:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
> freeswitch-users-bounces at lists.freeswitch.org] *On Behalf Of *Abaci B
> *Sent:* Tuesday, 16 February, 2016 14:14
> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> *Subject:* Re: [Freeswitch-users] AMD
>
>
>
> is the E7-8867L (Westmere / LGA1567 / Apr/3/11) modern/new enough to be
> considered good for hyperthreading?
>
>
>
> On Tue, Feb 16, 2016 at 3:07 PM, Anthony Minessale <
> anthony.minessale at gmail.com> wrote:
>
> If you want an opinionated answer to help you decide:
>
>
>
> Always use Intel.  AMD is Intel's R&D department.  The performance is
> better and the hyperthreading on modern Intel is fine.
>
>
>
>
>
> On Tue, Feb 16, 2016 at 2:01 PM, Abaci B <abaci64 at gmail.com> wrote:
>
> I'm debating between a 4x AMD 6276 (64 cores total) and 4x Intel E7-8867L
> (40 cores/80 threads), I wish I would be able to afford both and see which
> one (AMD vs Intel) is better... so if I know that hyperthreading is
> boosting performance I would probably stick to intel as in general it's
> better and it's more cores.
>
>
>
> On Tue, Feb 16, 2016 at 2:48 PM, Michael Jerris <mike at jerris.com> wrote:
>
> Have not tested it lately, but likely still true, in regards to "I
> guess"... why not just try it and see for sure?
>
>
>
> On Feb 16, 2016, at 2:15 PM, Abaci B <abaci64 at gmail.com> wrote:
>
>
>
> I remember in the early days of FreeSWITCH it was recommended to turn off
> hyperthreading as it had a negative impact on FreeSWITCH performace, Can
> someone confirm if this has changed with newer processors or newer kernel,
> if hyperthreading boosts performance then I would guess that a 10 core xeon
> would give me at least as much performace as a 16 core AMD.
>
> Thanks
>
>
>
> On Sun, Feb 14, 2016 at 12:52 PM, Michael Jerris <mike at jerris.com> wrote:
>
> You would have to test to see, most of my experience is a couple chip
> generations back now but bang for the buck was much better with intel then
> and we saw many more weird issues on AMD boxes.
>
>
>
> On Sunday, February 14, 2016, Abaci B <abaci64 at gmail.com> wrote:
>
> Hi all,
>
> I know that in general Intel Xeon processors are recommended over AMD for
> FreeSWITCH, my question is if AMD is really bad or just not as good as
> Intel, I can get now a server with 4x AMD 6174 (48 Core total) for about
> the same price I would pay for a Dual Xeon 6 Core (12 core total), Should I
> go for the AMD which will give me 4x the amount of cores or stick to Xeon,
> my goal is to get the maximum amount of channels/calls  (doing lua IVR with
> no transcoding) and conferencing.
>
> Any help, feedback, benchmarks or personal experience would be appreciated
>
> Thanks
>
>
>
>
>
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>
> Anthony Minessale II       ♬ @anthmfs  ♬ @FreeSWITCH  ♬
>
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>
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