From: "Yan, Zhirun" <zhirun.yan@intel.com>
To: Kevin Traynor <ktraynor@redhat.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"Zhang, Qi Z" <qi.z.zhang@intel.com>
Subject: Re: [dpdk-dev] [PATCH v1] net/i40e: support request any number of queues
Date: Thu, 17 Jan 2019 07:26:46 +0000 [thread overview]
Message-ID: <2F9759EBFF61914290A3BA61BDBE2C860B9FB268@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <1c8bba3d-b205-c629-73de-6dca2dfc998f@redhat.com>
> -----Original Message-----
> From: Kevin Traynor [mailto:ktraynor@redhat.com]
> Sent: Wednesday, January 16, 2019 1:34 AM
> To: Yan, Zhirun <zhirun.yan@intel.com>; dev@dpdk.org; Zhang, Qi Z
> <qi.z.zhang@intel.com>
> Subject: Re: [dpdk-dev] [PATCH v1] net/i40e: support request any number of
> queues
>
> On 01/15/2019 02:57 PM, Zhirun Yan wrote:
> > Before this patch, VF must request a specific queues(1/2/4/8/16) with
> > DPDK PF. This patch align the number of requested queues to next power
> > of 2. So VF can request any number queues from 1 to 16.
> >
> > Signed-off-by: Zhirun Yan <zhirun.yan@intel.com>
> > ---
> > drivers/net/i40e/i40e_pf.c | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c
> > index 092e0d3e9..d110dffb7 100644
> > --- a/drivers/net/i40e/i40e_pf.c
> > +++ b/drivers/net/i40e/i40e_pf.c
> > @@ -1271,7 +1271,10 @@
> i40e_pf_host_process_cmd_request_queues(struct i40e_pf_vf *vf, uint8_t
> *msg)
> > } else {
> > i40e_vc_notify_vf_reset(vf);
> > vf->vsi->nb_qps = req_pairs;
> > - pf->vf_nb_qps = req_pairs;
> > + if (rte_is_power_of_2(req_pairs))
> > + pf->vf_nb_qps = req_pairs;
> > + else
> > + pf->vf_nb_qps = i40e_align_floor(req_pairs) << 1;
>
> Shouldn't you do this before you validate against the number of free queue
> pairs? or it is somehow handled
Before PF alloc queue to VF, PF will check the queue number in i40e_res_pool_alloc().
Suppose there are 15 queues left in PF, this part will check 12 as a valid value if request 12 queues,
But PF will refuse to alloc 16 queue.
>
> > i40e_pf_host_process_cmd_reset_vf(vf);
> >
> > return 0;
> >
next prev parent reply other threads:[~2019-01-17 7:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-15 14:57 Zhirun Yan
2019-01-15 11:05 ` Zhang, Qi Z
2019-01-15 17:33 ` Kevin Traynor
2019-01-17 7:26 ` Yan, Zhirun [this message]
2019-03-05 16:19 ` Kevin Traynor
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2F9759EBFF61914290A3BA61BDBE2C860B9FB268@SHSMSX101.ccr.corp.intel.com \
--to=zhirun.yan@intel.com \
--cc=dev@dpdk.org \
--cc=ktraynor@redhat.com \
--cc=qi.z.zhang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).