On Thu, Feb 11, 2016 at 1:36 PM, Harold Demure
<harold.demure87 at gmail.com> wrote:
> Hello Vincent,
> Thank you for your reply. I followed the same reasoning as you did,
> looking at the source code earlier today.
>
> Can you send me a link that explains how to change RX for my NIC?
> I have been looking around for that, and also performed the steps in the
> DPDK official guide for MLX4, but apparently nothing changed (at least, the
> error was still there).
>
I am DPDK newbie too and no MLX4 nic to play with, I think you need to
find out how to enable RSS for MLX4
librte_pmd_mlx4/Makefile has some clue about RSS:
mlx4_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
$Q $(RM) -f -- '$@'
$Q sh -- '$<' '$@' \
RSS_SUPPORT \
infiniband/verbs.h \
enum IBV_EXP_DEVICE_UD_RSS $(AUTOCONF_OUTPUT)
maybe you can find the mlx4_autoconf.h and see if you have RSS_SUPPORT in it?
librte_pmd_mlx4/mlx4.c has:
#ifdef RSS_SUPPORT
if (ibv_exp_query_device(ctx, &exp_device_attr)) {
INFO("experimental ibv_exp_query_device");
goto port_error;
}
if ((exp_device_attr.exp_device_cap_flags &
IBV_EXP_DEVICE_QPG) &&
(exp_device_attr.exp_device_cap_flags &
IBV_EXP_DEVICE_UD_RSS) &&
(exp_device_attr.comp_mask &
IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ) &&
(exp_device_attr.max_rss_tbl_sz > 0)) {
priv->hw_qpg = 1;
priv->hw_rss = 1;
//<======================================
priv->max_rss_tbl_sz = exp_device_attr.max_rss_tbl_sz;
} else {
priv->hw_qpg = 0;
priv->hw_rss = 0;
priv->max_rss_tbl_sz = 0;
}
priv->hw_tss = !!(exp_device_attr.exp_device_cap_flags &
IBV_EXP_DEVICE_UD_TSS);
DEBUG("device flags: %s%s%s",
(priv->hw_qpg ? "IBV_DEVICE_QPG " : ""),
(priv->hw_tss ? "IBV_DEVICE_TSS " : ""),
(priv->hw_rss ? "IBV_DEVICE_RSS " : ""));
if (priv->hw_rss)
DEBUG("maximum RSS indirection table size: %u",
exp_device_attr.max_rss_tbl_sz);
#endif /* RSS_SUPPORT */
make sure you meet MLX4 library dependencies that has
ibv_exp_query_device to query mlx4 properly to make sure priv->hw_rss
= 1 ?
after you enabled RSS, then figure out how to enable multiple RX
queues or maybe it will be enabled automatically.
or you can ask MLX4 community
