From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: no hugepage with UIO poll-mode driver
Date: Wed, 25 Nov 2015 10:08:59 +0000
Message-ID: <20151125100859.GA3496@bricha3-MOBL3>
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To: Younghwan Go <yhwan@ndsl.kaist.edu>
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On Wed, Nov 25, 2015 at 03:39:17PM +0900, Younghwan Go wrote:
> Hi Jianfeng,
>=20
> Thanks for the email. rte mempool was successfully created without any
> error. Now the next problem is that rte_eth_rx_burst() is always return=
ing 0
> as if there was no packet to receive... Do you have any suggestion on w=
hat
> might be causing this issue? In the meantime, I will be digging through
> ixgbe driver code to see what's going on.
>=20
> Thank you,
> Younghwan
>=20

The problem is that with --no-huge we don't have the physical address of =
the memory
to write to the network card. That's what it's marked as for testing only=
.

/Bruce

> 2015-11-25 =EC=98=A4=ED=9B=84 3:19=EC=97=90 Tan, Jianfeng =EC=9D=B4(=EA=
=B0=80) =EC=93=B4 =EA=B8=80:
> >Hi Younghwan
> >When you specify --no-huge, by default, only 64M memory is used. Can y=
ou use -m 1024 to
> >Mmap 1G memory to have a try?
> >
> >Jianfeng
> >
> >>-----Original Message-----
> >>From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Younghwan Go
> >>Sent: Wednesday, November 25, 2015 1:46 PM
> >>To: dev@dpdk.org
> >>Subject: [dpdk-dev] no hugepage with UIO poll-mode driver
> >>
> >>Hello,
> >>
> >>I'm trying to create rte mempool with my own memory scheme (shared
> >>virtual memory between CPU & GPU) other than using hugepage. I'm usin=
g
> >>IGB UIO module with Ethernet 10G 2P X520 Adapter NIC.
> >>
> >>I first tried to disable hugepage by inserting "--no-huge" option, bu=
t it gave
> >>an error at rte_mempool_create function. Then I found in rte_eal.h fi=
le that
> >>said "no-huge mode cannot be used with UIO poll-mode drivers like
> >>igb/ixgbe".
> >>
> >>Is there a way to switch DPDK code to not use hugepage with ixgbe dri=
ver or
> >>is it not possible to do so?
> >>
> >>Thank you,
> >>Younghwan
>=20