Hi Mike,
Thanks for reporting the issue and providing the patch. In general we can't
accept patches unless you send us a contribution agreement (see
http://open-vm-tools.sourceforge.net/contribute.php), but I'll let the people
responsible for vmxnet3 know about the issue.
On 08/10/2011 03:55 AM, Mike wrote:
> Good day.
>
> While trying to test vmxnet3s's LSO functionality under
> Illumos (it is an OpenSolaris-based OS), I noticed, that
> throughput was dramatically slow - about 200-300 Kbits/Sec.
> Investigation led me to the fact that HW_LSO flag is resolved
> in a wrong way in '
>
> Here is the patch that fixes the problem:
>
>
> @@ -103,13 +103,19 @@ vmxnet3_tx_prepare_offload(vmxnet3_softc_t *dp,
> mblk_t *mp)
> {
> int ret = 0;
> - uint32_t start, stuff, value, flags;
> + uint32_t start, stuff, value, flags, lsoflags, mss;
>
> ol->om = VMXNET3_OM_NONE;
> ol->hlen = 0;
> ol->msscof = 0;
>
> hcksum_retrieve(mp, NULL, NULL, &start, &stuff, NULL, &value,
> &flags);
> +
> + mac_lso_get(mp, &mss, &lsoflags);
> + if (lsoflags & HW_LSO) {
> + flags |= HW_LSO;
> + }
> +
--
- Marcelo
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