[dpdk-dev,1/5] net/ixgbevf: unregister irq handler when other interrupts not allowed.
Checks
Commit Message
When we bind the ixgbe VF (e.g 82599 card) to igb_uio and enable the
rx-interrupt, there will be more than one epoll_wait on intr_handle.fd.
One is in "eal-intr-thread" thread, and the others are in the thread
which call the "rte_epoll_wait". The problem is that sometiems
"eal-intr-thread" thread will process the rx interrupt, and then
rte_epoll_wait can't get the event any more, and the packets may be lost.
We should unregister the status interrupt handler in "eal-intr-thread"
thread and the ixgbe pf is in the same case.
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
---
drivers/net/ixgbe/ixgbe_ethdev.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
Comments
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Tonghao Zhang
> Sent: Friday, January 5, 2018 10:11 PM
> To: dev@dpdk.org
> Cc: Tonghao Zhang <xiangxia.m.yue@gmail.com>
> Subject: [dpdk-dev] [PATCH 1/5] net/ixgbevf: unregister irq handler when
> other interrupts not allowed.
>
> When we bind the ixgbe VF (e.g 82599 card) to igb_uio and enable the rx-
> interrupt, there will be more than one epoll_wait on intr_handle.fd.
> One is in "eal-intr-thread" thread, and the others are in the thread which call
> the "rte_epoll_wait". The problem is that sometiems "eal-intr-thread"
> thread will process the rx interrupt, and then rte_epoll_wait can't get the
> event any more, and the packets may be lost.
>
> We should unregister the status interrupt handler in "eal-intr-thread"
> thread and the ixgbe pf is in the same case.
>
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
The patch looks OK for me, the commit log can be reworded, for example, "we" can be removed.
Apart from that:
Acked-by: Beilei Xing <beilei.xing@intel.com>
> ---
> drivers/net/ixgbe/ixgbe_ethdev.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> b/drivers/net/ixgbe/ixgbe_ethdev.c
> index 43e0132..e67389f 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -5049,6 +5049,15 @@ static int
> ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
> }
> ixgbevf_configure_msix(dev);
>
> + if (!rte_intr_allow_others(intr_handle)) {
> + rte_intr_callback_unregister(intr_handle,
> + ixgbevf_dev_interrupt_handler,
> + dev);
> + if (dev->data->dev_conf.intr_conf.lsc != 0)
> + PMD_INIT_LOG(INFO, "lsc won't enable because of"
> + " no intr multiplex");
> + }
> +
> /* When a VF port is bound to VFIO-PCI, only miscellaneous interrupt
> * is mapped to VFIO vector 0 in eth_ixgbevf_dev_init( ).
> * If previous VFIO interrupt mapping setting in
> eth_ixgbevf_dev_init( ) @@ -5091,6 +5100,12 @@ static int
> ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
>
> ixgbe_dev_clear_queues(dev);
>
> + if (!rte_intr_allow_others(intr_handle))
> + /* resume to the default handler */
> + rte_intr_callback_register(intr_handle,
> + ixgbevf_dev_interrupt_handler,
> + (void *)dev);
> +
> /* Clean datapath event and queue/vec mapping */
> rte_intr_efd_disable(intr_handle);
> if (intr_handle->intr_vec != NULL) {
> --
> 1.8.3.1
On Thu, Jan 11, 2018 at 2:55 PM, Xing, Beilei <beilei.xing@intel.com> wrote:
>
>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Tonghao Zhang
>> Sent: Friday, January 5, 2018 10:11 PM
>> To: dev@dpdk.org
>> Cc: Tonghao Zhang <xiangxia.m.yue@gmail.com>
>> Subject: [dpdk-dev] [PATCH 1/5] net/ixgbevf: unregister irq handler when
>> other interrupts not allowed.
>>
>> When we bind the ixgbe VF (e.g 82599 card) to igb_uio and enable the rx-
>> interrupt, there will be more than one epoll_wait on intr_handle.fd.
>> One is in "eal-intr-thread" thread, and the others are in the thread which call
>> the "rte_epoll_wait". The problem is that sometiems "eal-intr-thread"
>> thread will process the rx interrupt, and then rte_epoll_wait can't get the
>> event any more, and the packets may be lost.
>>
>> We should unregister the status interrupt handler in "eal-intr-thread"
>> thread and the ixgbe pf is in the same case.
>>
>> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
>
> The patch looks OK for me, the commit log can be reworded, for example, "we" can be removed.
Yes
> Apart from that:
> Acked-by: Beilei Xing <beilei.xing@intel.com>
Thanks for your reviews. I will repost v2
>
>> ---
>> drivers/net/ixgbe/ixgbe_ethdev.c | 15 +++++++++++++++
>> 1 file changed, 15 insertions(+)
>>
>> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
>> b/drivers/net/ixgbe/ixgbe_ethdev.c
>> index 43e0132..e67389f 100644
>> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
>> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
>> @@ -5049,6 +5049,15 @@ static int
>> ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
>> }
>> ixgbevf_configure_msix(dev);
>>
>> + if (!rte_intr_allow_others(intr_handle)) {
>> + rte_intr_callback_unregister(intr_handle,
>> + ixgbevf_dev_interrupt_handler,
>> + dev);
>> + if (dev->data->dev_conf.intr_conf.lsc != 0)
>> + PMD_INIT_LOG(INFO, "lsc won't enable because of"
>> + " no intr multiplex");
>> + }
>> +
>> /* When a VF port is bound to VFIO-PCI, only miscellaneous interrupt
>> * is mapped to VFIO vector 0 in eth_ixgbevf_dev_init( ).
>> * If previous VFIO interrupt mapping setting in
>> eth_ixgbevf_dev_init( ) @@ -5091,6 +5100,12 @@ static int
>> ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
>>
>> ixgbe_dev_clear_queues(dev);
>>
>> + if (!rte_intr_allow_others(intr_handle))
>> + /* resume to the default handler */
>> + rte_intr_callback_register(intr_handle,
>> + ixgbevf_dev_interrupt_handler,
>> + (void *)dev);
>> +
>> /* Clean datapath event and queue/vec mapping */
>> rte_intr_efd_disable(intr_handle);
>> if (intr_handle->intr_vec != NULL) {
>> --
>> 1.8.3.1
>
@@ -5049,6 +5049,15 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
}
ixgbevf_configure_msix(dev);
+ if (!rte_intr_allow_others(intr_handle)) {
+ rte_intr_callback_unregister(intr_handle,
+ ixgbevf_dev_interrupt_handler,
+ dev);
+ if (dev->data->dev_conf.intr_conf.lsc != 0)
+ PMD_INIT_LOG(INFO, "lsc won't enable because of"
+ " no intr multiplex");
+ }
+
/* When a VF port is bound to VFIO-PCI, only miscellaneous interrupt
* is mapped to VFIO vector 0 in eth_ixgbevf_dev_init( ).
* If previous VFIO interrupt mapping setting in eth_ixgbevf_dev_init( )
@@ -5091,6 +5100,12 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
ixgbe_dev_clear_queues(dev);
+ if (!rte_intr_allow_others(intr_handle))
+ /* resume to the default handler */
+ rte_intr_callback_register(intr_handle,
+ ixgbevf_dev_interrupt_handler,
+ (void *)dev);
+
/* Clean datapath event and queue/vec mapping */
rte_intr_efd_disable(intr_handle);
if (intr_handle->intr_vec != NULL) {