On 11/03/2010 10:47 AM, marius zbihlei wrote:
On 11/02/2010 07:42 PM, Henning Westerholt wrote:
On Sunday 24 October 2010, Juha Heinanen wrote:
[..]
yes, i just had forgotten to call force_send_socket() in one particular
case and therefore got the send errors.
i have not used mhomed=1 because of the performance warning on the wiki
page. it that warning still valid?
Hello Marius,
you did some tests in the past after your improvement(s). Do you think the
performance warning is still valid? Otherwise we should remove it.
Thanks and regards,
Henning
Hello all,
Surely the performance has increased a lot(I don't recall the numbers
exactly but it was a big improvement).
Replying to myself,
I found the numbers I worked on last year. With a rate of 5000 calls/s a
K proxy with the original mhomed implementation had aboud 75-80% CPU
load. With the newest patched mhomed implementation, the load decrease
to about 65%. With 6000 calls/s without the patch the load went up to
100% and a lot of retransmits were generated(thus the load increased via
a avalanche effect), but with the patch the load was about 85-90% so
fewer retransmits were generated. I don't recall the exact cfg, and your
results may very accordingly depending on setup/HW (for example I used a
Quad Core Xeon with 4 GB RAM and a Gigabit Ethernet running a stable 2.6
kernel and Kamailio 1.5).
I must stress the fact that you must first test mhomed before deploying.
I have heard reports (not yet confirmed) that for certain
implementations it behaves badly. I haven't yet managed to
confirm/infirm these reports but I am currently looking into it so you
wait 2-3 days I can get back to you with some findings. When I have
tested mhomed everything went OK.
Marius
Before deploying mhomed in
production I strongly recommend testing the mhomed=1 parameter in a
environment closest to your network setup for at least a couple of days
before rolling into production.
Marius
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