TCP/UDP cksum offload on hme(4)

[Pyun YongHyeon]

On Wed, Jun 16, 2004 at 11:42:58PM +0200, Herve Boulouis wrote:
 > Le 16/06/2004 ? 12:45, Pyun YongHyeon a ?crit:
 > > Hello All,
 > > 
 > >  2. The patch was tested on Ultra2(2x300MHz, FAS366). I'd like to
 > >     hear ok/nok results from PCI based sparc64 users.
 > >     The dmesg of the Ultra2 is available at:
 > >     http:///www.kr.freebsd.org/~yognari/dmesg.u2.txt
 > > 
 > >  3. I couldn't feel performance boost from the cksum offloads but
 > >     enabling it reduced system loads considerably.
 > 
 > After some very basic testing (mainly ftp transfers), your patch
 > seems to work correctly on my netra t 1125 (2*300Mhz).
 > 
 > My -current is from mid april.
 > 
Thanks for your report. Did you get some speed up by cksum offload?
Did you notice system loads changes under heavy traffic?
How about NFS over UDP transport layer?

I can't saturate the wire with/without my patch.(For TCP without
witness it was about 67Mbps. On OpenBSD I got about 93Mbps.)
I vaguely guess the reason was caused by hme's lack of
auto-negotiation.

 > -- 
 > Herve Boulouis

Regards,
Pyun YongHyeon
-- 
Pyun YongHyeon <http://www.kr.freebsd.org/~yongari>