DPDK patches and discussions
 help / color / mirror / Atom feed
* [dpdk-dev] [PATCH v3 1/6] net/ixgbevf: unregister irq handler when other interrupts not allowed.
@ 2018-01-14 10:03 xiangxia.m.yue
  2018-01-14 10:03 ` [dpdk-dev] [PATCH v3 2/6] net/ixgbevf: set the inter-interrupt interval for EITR xiangxia.m.yue
                   ` (5 more replies)
  0 siblings, 6 replies; 9+ messages in thread
From: xiangxia.m.yue @ 2018-01-14 10:03 UTC (permalink / raw)
  To: wei.dai, beilei.xing; +Cc: dev, Tonghao Zhang

From: Tonghao Zhang <xiangxia.m.yue@gmail.com>

When 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 sometimes
"eal-intr-thread" thread will process the rx interrupt, and then
rte_epoll_wait can't get the event anymore, and the packets may be lost.

The patch 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>
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 ff19a56..0e056a2 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -5078,6 +5078,15 @@ 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( )
@@ -5120,6 +5129,12 @@ 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

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2018-01-17 14:49 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-14 10:03 [dpdk-dev] [PATCH v3 1/6] net/ixgbevf: unregister irq handler when other interrupts not allowed xiangxia.m.yue
2018-01-14 10:03 ` [dpdk-dev] [PATCH v3 2/6] net/ixgbevf: set the inter-interrupt interval for EITR xiangxia.m.yue
2018-01-14 10:03 ` [dpdk-dev] [PATCH v3 3/6] net/ixgbe: set the ITR via configuration xiangxia.m.yue
2018-01-14 10:03 ` [dpdk-dev] [PATCH v3 5/6] net/ixgbevf: save IXGBE_VTEIMS to intr->mask for performance xiangxia.m.yue
2018-01-14 10:03 ` [dpdk-dev] [PATCH v3 6/6] net/ixgbe: remove the unnecessary call rte_intr_enable xiangxia.m.yue
2018-01-15  4:57 ` [dpdk-dev] [PATCH v3 1/6] net/ixgbevf: unregister irq handler when other interrupts not allowed Dai, Wei
2018-01-15  8:57   ` Tonghao Zhang
2018-01-17  1:38     ` Tonghao Zhang
2018-01-17 14:49 ` Zhang, Helin

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).