From: Vincent Li <vincent.mc.li@gmail.com>
To: Harold Demure <harold.demure87@gmail.com>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] DPDK 2.2 MLX4: problem with number of TX/RX queues
Date: Thu, 11 Feb 2016 14:57:22 -0800 [thread overview]
Message-ID: <CAK3+h2yc0iyTgSyw3+QevrOXuSS7XQx+qFbDbPzXoYLJg2E3Fg@mail.gmail.com> (raw)
In-Reply-To: <CAKbMwWrtcHX=OYQ49W95MuvvAaxfNmejnvEZd_buW_W0+WN9OQ@mail.gmail.com>
On Thu, Feb 11, 2016 at 1:36 PM, Harold Demure
<harold.demure87@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
next prev parent reply other threads:[~2016-02-11 22:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-11 14:24 Non Voglio
2016-02-11 19:10 ` Vincent Li
2016-02-11 21:36 ` Harold Demure
2016-02-11 22:57 ` Vincent Li [this message]
2016-02-15 8:59 ` Olga Shern
2016-02-16 16:04 ` Harold Demure
2016-02-18 10:31 ` Gilad Berman
2016-02-19 20:01 ` Harold Demure
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