[Serusers] Performance tuning

[zeusng]

Can anyone give me a realistic test case for measuring SER performance? I've
been using sipsak to stress my SER server but am not able to interpret the
result.

Here are some sipsak were run:

[siptest at sipuat siptest]$ sipsak -U -I -e 10000 -s sip:40 at mysip.test -r 5060
-n 800 -z -vv 
[siptest at sipuat siptest]$ sipsak -U -I -e 50000 -s sip:30 at mysip.test -r 5060
-n 2 -z -vv 
[siptest at sipuat siptest]$ sipsak -U -I -e 10000 -s sip:40 at mysip.test -r 5060
-n 150 -z -vv 
[siptest at sipuat siptest]$ sipsak -U -I -e 10000 -s sip:40 at mysip.test -r 5060
-n 50 -z -vv 

One of the result as follow:

All usrloc tests completed successful.
received last message 109125.023 ms after first request (test duration).
biggest delay between request and response was 46082.422 ms
10 retransmission(s) received from server.
9 time(s) the timeout of 5000 ms exceeded and request was retransmitted.

I guess a delay of 46s (46082.422ms) is definitely not acceptable. What
should I set for -n to be comparable to real world traffic.

And what kind of result should I expect.


Side issue:

During my stress test, I experience the same problem Andres reported last
Nov.
udp_rcv_loop:recvfrom:[11] Resource temporarily unavailable

After I modify some kernel (Fedora Core 1, Linux 2.4.22) parameters, the
problem seems to go away. Anyone happy to prove the case?

# echo "8388608" > /proc/sys/net/core/rmem_max
# echo "8388608" > /proc/sys/net/core/wmem_max
# echo "8388608" > /proc/sys/net/core/rmem_default
# echo "8388608" > /proc/sys/net/core/wmem_default

Zeus


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