From: "Ouyang, Changchun" <changchun.ouyang@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>,
"Xie, Huawei" <huawei.xie@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2 04/24] virtio: Add support for Link State interrupt
Date: Wed, 28 Jan 2015 03:03:32 +0000 [thread overview]
Message-ID: <F52918179C57134FAEC9EA62FA2F96251198F0D1@shsmsx102.ccr.corp.intel.com> (raw)
In-Reply-To: <20150127100006.007fbf8c@uryu.home.lan>
Hi Stephen,
> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@networkplumber.org]
> Sent: Tuesday, January 27, 2015 6:00 PM
> To: Xie, Huawei
> Cc: Ouyang, Changchun; dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v2 04/24] virtio: Add support for Link State
> interrupt
>
> On Tue, 27 Jan 2015 09:04:07 +0000
> "Xie, Huawei" <huawei.xie@intel.com> wrote:
>
> > > -----Original Message-----
> > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Ouyang
> > > Changchun
> > > Sent: Tuesday, January 27, 2015 10:36 AM
> > > To: dev@dpdk.org
> > > Subject: [dpdk-dev] [PATCH v2 04/24] virtio: Add support for Link
> > > State interrupt
> > >
> > > Virtio has link state interrupt which can be used.
> > >
> > > Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> > > Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> > > ---
> > > lib/librte_pmd_virtio/virtio_ethdev.c | 78
> > > +++++++++++++++++++++++++++------
> > > --
> > > lib/librte_pmd_virtio/virtio_pci.c | 22 ++++++++++
> > > lib/librte_pmd_virtio/virtio_pci.h | 4 ++
> > > 3 files changed, 86 insertions(+), 18 deletions(-)
> > >
> > > diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c
> > > b/lib/librte_pmd_virtio/virtio_ethdev.c
> > > index 5df3b54..ef87ff8 100644
> > > --- a/lib/librte_pmd_virtio/virtio_ethdev.c
> > > +++ b/lib/librte_pmd_virtio/virtio_ethdev.c
> > > @@ -845,6 +845,34 @@ static int virtio_resource_init(struct
> > > rte_pci_device *pci_dev __rte_unused) #endif
> > >
> > > /*
> > > + * Process Virtio Config changed interrupt and call the callback
> > > + * if link state changed.
> > > + */
> > > +static void
> > > +virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
> > > + void *param)
> > > +{
> > > + struct rte_eth_dev *dev = param;
> > > + struct virtio_hw *hw =
> > > + VIRTIO_DEV_PRIVATE_TO_HW(dev->data->dev_private);
> > > + uint8_t isr;
> > > +
> > > + /* Read interrupt status which clears interrupt */
> > > + isr = vtpci_isr(hw);
> > > + PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
> > > +
> > > + if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0)
> > > + PMD_DRV_LOG(ERR, "interrupt enable failed");
> > > +
> >
> > Is it better to put rte_intr_enable after we have handled the interrupt.
> > Is there the possibility of interrupt reentrant in uio intr framework?
>
> The UIO framework handles IRQ's via posix thread that is reading fd, then
> calling this code. Therefore it is always single threaded.
Even if it is under UIO framework, and always single threaded,
How about move rte_intr_enable after the virtio_dev_link_update() and _rte_eth_dev_callback_process is called.
This make it more like interrupt handler in linux kernel.
What do you think of it?
Thanks
Changchun
next prev parent reply other threads:[~2015-01-28 3:03 UTC|newest]
Thread overview: 132+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-15 5:15 [dpdk-dev] [PATCH 00/22] Single virtio implementation Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 01/22] virtio: Rearrange resource initialization Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 02/22] virtio: Use weaker barriers Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 03/22] virtio: Allow starting with link down Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 04/22] virtio: Add support for Link State interrupt Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 05/22] ether: Add soft vlan encap/decap functions Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 06/22] virtio: Use software vlan stripping Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 07/22] virtio: Remove unnecessary adapter structure Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 08/22] virtio: Remove redundant vq_alignment Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 09/22] virtio: Fix how states are handled during initialization Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 10/22] virtio: Make vtpci_get_status local Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 11/22] virtio: Check for packet headroom at compile time Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 12/22] virtio: Move allocation before initialization Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 13/22] virtio: Add support for vlan filtering Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 14/22] virtio: Add suport for multiple mac addresses Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 15/22] virtio: Add ability to set MAC address Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 16/22] virtio: Free mbuf's with threshold Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 17/22] virtio: Use port IO to get PCI resource Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 18/22] virtio: Fix descriptor index issue Ouyang Changchun
2015-01-15 16:54 ` Stephen Hemminger
2015-01-16 0:55 ` Ouyang, Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 19/22] ether: Fix vlan strip/insert issue Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 20/22] example/vhost: Avoid inserting vlan twice Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 21/22] example/vhost: Add vlan-strip cmd line option Ouyang Changchun
2015-01-15 5:15 ` [dpdk-dev] [PATCH 22/22] virtio: Use soft vlan strip in mergeable Rx path Ouyang Changchun
2015-01-15 16:55 ` Stephen Hemminger
2015-01-16 0:56 ` Ouyang, Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 00/24] Single virtio implementation Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 01/24] virtio: Rearrange resource initialization Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 02/24] virtio: Use weaker barriers Ouyang Changchun
2015-01-27 7:03 ` Xie, Huawei
2015-01-27 9:58 ` Stephen Hemminger
2015-01-27 16:16 ` Xie, Huawei
2015-01-28 6:12 ` Ouyang, Changchun
2015-01-27 7:56 ` Xie, Huawei
2015-01-27 8:04 ` Ouyang, Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 03/24] virtio: Allow starting with link down Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 04/24] virtio: Add support for Link State interrupt Ouyang Changchun
2015-01-27 9:04 ` Xie, Huawei
2015-01-27 10:00 ` Stephen Hemminger
2015-01-28 3:03 ` Ouyang, Changchun [this message]
2015-01-28 15:11 ` Stephen Hemminger
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 05/24] ether: Add soft vlan encap/decap functions Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 06/24] virtio: Use software vlan stripping Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 07/24] virtio: Remove unnecessary adapter structure Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 08/24] virtio: Remove redundant vq_alignment Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 09/24] virtio: Fix how states are handled during initialization Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 10/24] virtio: Make vtpci_get_status local Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 11/24] virtio: Check for packet headroom at compile time Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 12/24] virtio: Move allocation before initialization Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 13/24] virtio: Add support for vlan filtering Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 14/24] virtio: Add suport for multiple mac addresses Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 15/24] virtio: Add ability to set MAC address Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 16/24] virtio: Free mbuf's with threshold Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 17/24] virtio: Use port IO to get PCI resource Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 18/24] virtio: Fix descriptor index issue Ouyang Changchun
2015-01-27 2:35 ` [dpdk-dev] [PATCH v2 19/24] ether: Fix vlan strip/insert issue Ouyang Changchun
2015-01-27 2:36 ` [dpdk-dev] [PATCH v2 20/24] example/vhost: Avoid inserting vlan twice Ouyang Changchun
2015-01-27 2:36 ` [dpdk-dev] [PATCH v2 21/24] example/vhost: Add vlan-strip cmd line option Ouyang Changchun
2015-01-27 2:36 ` [dpdk-dev] [PATCH v2 22/24] virtio: Use soft vlan strip in mergeable Rx path Ouyang Changchun
2015-01-27 2:36 ` [dpdk-dev] [PATCH v2 23/24] virtio: Fix zero copy break issue Ouyang Changchun
2015-01-27 2:36 ` [dpdk-dev] [PATCH v2 24/24] virtio: Remove hotspots Ouyang Changchun
2015-01-27 3:06 ` [dpdk-dev] [PATCH v2 00/24] Single virtio implementation Matthew Hall
2015-01-27 3:42 ` Wiles, Keith
2015-01-27 9:41 ` Matthew Hall
2015-01-27 10:02 ` Stephen Hemminger
2015-01-27 18:59 ` Matthew Hall
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 00/25] " Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 01/25] virtio: Rearrange resource initialization Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 02/25] virtio: Use weaker barriers Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 03/25] virtio: Allow starting with link down Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 04/25] virtio: Add support for Link State interrupt Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 05/25] ether: Add soft vlan encap/decap functions Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 06/25] virtio: Use software vlan stripping Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 07/25] virtio: Remove unnecessary adapter structure Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 08/25] virtio: Remove redundant vq_alignment Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 09/25] virtio: Fix how states are handled during initialization Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 10/25] virtio: Make vtpci_get_status local Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 11/25] virtio: Check for packet headroom at compile time Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 12/25] virtio: Move allocation before initialization Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 13/25] virtio: Add support for vlan filtering Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 14/25] virtio: Add suport for multiple mac addresses Ouyang Changchun
2015-01-29 7:23 ` [dpdk-dev] [PATCH v3 15/25] virtio: Add ability to set MAC address Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 16/25] virtio: Free mbuf's with threshold Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 17/25] virtio: Use port IO to get PCI resource Ouyang Changchun
2015-01-29 23:14 ` Thomas Monjalon
2015-02-04 1:31 ` Ouyang, Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 18/25] virtio: Fix descriptor index issue Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 19/25] ether: Fix vlan strip/insert issue Ouyang Changchun
2015-02-04 10:54 ` Xie, Huawei
2015-02-05 0:54 ` Ouyang, Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 20/25] example/vhost: Avoid inserting vlan twice Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 21/25] example/vhost: Add vlan-strip cmd line option Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 22/25] virtio: Use soft vlan strip in mergeable Rx path Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 23/25] virtio: Fix zero copy break issue Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 24/25] virtio: Remove hotspots Ouyang Changchun
2015-01-29 7:24 ` [dpdk-dev] [PATCH v3 25/25] virtio: Fix wmb issue Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 00/26] Single virtio implementation Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 01/26] virtio: Rearrange resource initialization Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 02/26] virtio: Use weaker barriers Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 03/26] virtio: Allow starting with link down Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 04/26] virtio: Add support for Link State interrupt Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 05/26] ether: Add soft vlan encap/decap functions Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 06/26] virtio: Use software vlan stripping Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 07/26] virtio: Remove unnecessary adapter structure Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 08/26] virtio: Remove redundant vq_alignment Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 09/26] virtio: Fix how states are handled during initialization Ouyang Changchun
2015-02-09 1:13 ` [dpdk-dev] [PATCH v4 10/26] virtio: Make vtpci_get_status local Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 11/26] virtio: Check for packet headroom at compile time Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 12/26] virtio: Move allocation before initialization Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 13/26] virtio: Add support for vlan filtering Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 14/26] virtio: Add suport for multiple mac addresses Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 15/26] virtio: Add ability to set MAC address Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 16/26] virtio: Free mbuf's with threshold Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 17/26] virtio: Use port IO to get PCI resource Ouyang Changchun
2015-02-11 4:32 ` Stephen Hemminger
2015-02-11 4:50 ` Ouyang, Changchun
2015-02-11 7:29 ` Vincent JARDIN
2015-02-11 13:50 ` Stephen Hemminger
2015-02-11 14:16 ` Thomas Monjalon
2015-02-12 0:52 ` Ouyang, Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 18/26] virtio: Fix descriptor index issue Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 19/26] ether: Fix vlan strip/insert issue Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 20/26] example/vhost: Avoid inserting vlan twice Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 21/26] example/vhost: Add vlan-strip cmd line option Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 22/26] virtio: Use soft vlan strip in mergeable Rx path Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 23/26] virtio: Fix zero copy break issue Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 24/26] virtio: Remove hotspots Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 25/26] virtio: Fix wmb issue Ouyang Changchun
2015-02-09 1:14 ` [dpdk-dev] [PATCH v4 26/26] virtio: Fix updating vring descriptor index issue Ouyang Changchun
2015-02-17 6:04 ` [dpdk-dev] [PATCH v4 00/26] Single virtio implementation Xie, Huawei
2015-02-20 18:06 ` Thomas Monjalon
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=F52918179C57134FAEC9EA62FA2F96251198F0D1@shsmsx102.ccr.corp.intel.com \
--to=changchun.ouyang@intel.com \
--cc=dev@dpdk.org \
--cc=huawei.xie@intel.com \
--cc=stephen@networkplumber.org \
/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).