On 05/10/10 08:38 AM, Ken Mandelberg wrote:
I've been testing a wimax 8 megabit connection. Against a Linux server I get
essentially full throughput of a megabyte/sec on bulk transfers. Against a
Solaris 10 sparc I get about a quarter of that.
Ping shows about 100ms of latency against both servers (they are both on the
same Lan). I've tried some tuning on sparc increasing tcp_cwnd_max,
tcp_xmit_hiwat, and tcp_recv_hiwat, but I don't see any real effect.
Is there something else to tune?
This was on Sol 10 U3. I haven't tried tuning on U6, but the default
performance is equally poor.
Out of curiosity, have you tested OpenSolaris? The results may be
different there.
Also, you should try eliminating the TCP stack to make sure that the
problem isn't with your driver or the hardware. Link level performance
numbers would be useful information to have. I'm not sure how you get
them with wimax, but perhaps just pushing a bunch of unacknowledged UDP
frames would be a start.
- Garrett
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