I we have a basic twisted server that we have doing nothing but dropping received bits on the floor, and sending back a static response.<br><br>We have tested it on a Solaris 10 on a Sun T1000 ( 8 cores ) and on Solaris 8 on a Sun V210.
<br>We did initial load testing on a Dell 2850 ( 2 Hyperthreaded P4&#39;s ) using&nbsp; Red Hat WS 3 (Taroon Update 4) / (&nbsp; Linux 2.4.21-27.ELsmp )<br><br>The Solaris boxes are all showing latency 5 times what we are seeing on the Dell 2850 with 1/5 as many clients to boot.
<br><br>On the Dell 2850 ( linux thinks it is a quad processor box ) our Twisted server is more Network I/O bound than CPU bound until we get to around 800 - 900 clients, latency is manageable all the way up to about 1400 clients, at which time they start getting progressively worse.
<br><br>All the Sparc boxes start out CPU bound at about 200 clients and latencies are way worse than Linux with 1400 clients.<br><br>The only Solaris 10 x86 box we have to test on is so old it is almost impossible to compare to even the Dell 2850. :-(
<br><br>We are using Python 2.4.4 and Twisted 2.4.0 using the poll reactor in all cases.<br><br>Anyone have any idea why we are seeing such poor performance on Solaris?<br>Is it the Sparc hardware?<br>