Re: [dpdk-dev] [PATCH 4/6] vhost: Add new command line option: rxq

["Ouyang, Changchun" <changchun.ouyang@intel.com>]

Hi Thomas,

> -----Original Message-----
> From: Ouyang, Changchun
> Sent: Saturday, May 23, 2015 9:25 AM
> To: Thomas F Herbert; dpdk >> dev@dpdk.org
> Cc: Ouyang, Changchun
> Subject: RE: [dpdk-dev] [PATCH 4/6] vhost: Add new command line option:
> rxq
> 
> Hi Thomas,
> 
> > -----Original Message-----
> > From: Thomas F Herbert [mailto:therbert@redhat.com]
> > Sent: Friday, May 22, 2015 8:51 PM
> > To: Ouyang, Changchun; dpdk >> dev@dpdk.org
> > Subject: Re: [dpdk-dev] [PATCH 4/6] vhost: Add new command line option:
> > rxq
> >
> >
> >
> > On 5/22/15 2:05 AM, Ouyang, Changchun wrote:
> > > Hi Thomas,
> > >
> > >> -----Original Message-----
> > >> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas F
> > Herbert
> > >> Sent: Friday, May 22, 2015 9:39 AM
> > >> To: dpdk >> dev@dpdk.org
> > >> Subject: Re: [dpdk-dev] [PATCH 4/6] vhost: Add new command line
> > option:
> > >> rxq
> > >>
> > >>
> > >>
> > >> On 5/21/15 3:49 AM, Ouyang Changchun wrote:
> > >>> Sample vhost need know the queue number user want to enable for
> > each
> > >>> virtio device, so add the new option '--rxq' into it.
> > >> Could you also add the new --rxq option description to
> us_vhost_usage()?
> > >
> > > Actually we have, please see below
> > True enough. However, the code calls rte_eal_init() before parsing
> > args and therefore takes rte_exit before printing usage of the non-eal
> options.

Use this command line could address your question:
vhost-switch -c 0xf -n 4 -- -help
it will go through eal  and come to helper function in vhost-switch, then you can see the usage info for vhost.

Thanks
Changchun