Rick Jones <rick.jones2@hp.com> writes:

> Alex Vinokur <alexvn@users.sourceforge.net> wrote:
>> HP-UX B.11.23 ia64
>
>> How can we know if the TCP checksum is done by HW (the used NIC) or
>> by software?
>
> That would I suspect be via some lanadmin command.

Assuming "latest technology" form HP, the suggested command should be "nwmgr
-g --st -c btlan" (or so).

As an interesting note: While HP docs say that lanadmin and comparables are
considered obsolete, their current VLAN configuration script still uses
lanadmin instead of nwmgr. ;-)

>
> More broadly, a while back, HP-UX stopped enabling CKO (ChecKsum
> Offload) on 1G links by default. It will enable it on 10G links by
> default. The last time I checked IB, none of the IB links out there
> even offered CKO, but that may have changed, although I don't know if
> that would have been reflected in the offerings for the Integrity
> servers running HP-UX.
>
> Also, if you were to use caliper <http://www.hp.com/go/caliper> to
> profile the system you could see or not see the checksum routines
> being called and consuming non-epsilon quantities of CPU time.
>
> rick jones
> --
> denial, anger, bargaining, depression, acceptance, rebirth...
> where do you want to be today?
> these opinions are mine, all mine; HP might not want them anyway...
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