On 19/02/2015 13:48, Zhou Danny wrote:
> v4 changes
> - Export interrupt enable/disable functions for shared libraries
> - Adjust position of new-added structure fields and functions to
> avoid breaking ABI
>
> v3 changes
> - Add return value for interrupt enable/disable functions
> - Move spinlok from PMD to L3fwd-power
> - Remove unnecessary variables in e1000_mac_info
> - Fix miscelleous review comments
>
> v2 changes
> - Fix compilation issue in Makefile for missed header file.
> - Consolidate internal and community review comments of v1 patch set.
>
> The patch series introduce low-latency one-shot rx interrupt into DPDK with
> polling and interrupt mode switch control example.
>
> DPDK userspace interrupt notification and handling mechanism is based on UIO
> with below limitation:
> 1) It is designed to handle LSC interrupt only with inefficient suspended
> pthread wakeup procedure (e.g. UIO wakes up LSC interrupt handling thread
> which then wakes up DPDK polling thread). In this way, it introduces
> non-deterministic wakeup latency for DPDK polling thread as well as packet
> latency if it is used to handle Rx interrupt.
> 2) UIO only supports a single interrupt vector which has to been shared by
> LSC interrupt and interrupts assigned to dedicated rx queues.
>
> This patchset includes below features:
> 1) Enable one-shot rx queue interrupt in ixgbe PMD(PF & VF) and igb PMD(PF
> only).
> 2) Build on top of the VFIO mechanism instead of UIO, so it could support
> up to 64 interrupt vectors for rx queue interrupts.
> 3) Have 1 DPDK polling thread handle per Rx queue interrupt with a dedicated
> VFIO eventfd, which eliminates non-deterministic pthread wakeup latency in
> user space.
> 4) Demonstrate interrupts control APIs and userspace NAIP-like
> polling/interrupt
> switch algorithms in L3fwd-power example.
>
> Known limitations:
> 1) It does not work for UIO due to a single interrupt eventfd shared by LSC
> and rx queue interrupt handlers causes a mess.
> 2) LSC interrupt is not supported by VF driver, so it is by default disabled
> in L3fwd-power now. Feel free to turn in on if you want to support both LSC
> and rx queue interrupts on a PF.
>
> Danny Zhou (5):
> ethdev: add rx interrupt enable/disable functions
> ixgbe: enable rx queue interrupts for both PF and VF
> igb: enable rx queue interrupts for PF
> eal: add per rx queue interrupt handling based on VFIO
> l3fwd-power: enable one-shot rx interrupt and polling/interrupt mode
> switch
>
> examples/l3fwd-power/main.c | 153 ++++++---
> lib/librte_eal/common/include/rte_eal.h | 12 +
> lib/librte_eal/linuxapp/eal/Makefile | 1 +
> lib/librte_eal/linuxapp/eal/eal_interrupts.c | 190 ++++++++---
> lib/librte_eal/linuxapp/eal/eal_pci_vfio.c | 12 +-
> .../linuxapp/eal/include/exec-env/rte_interrupts.h | 4 +
> lib/librte_ether/rte_ethdev.c | 43 +++
> lib/librte_ether/rte_ethdev.h | 59 ++++
> lib/librte_ether/rte_ether_version.map | 2 +
> lib/librte_pmd_e1000/e1000_ethdev.h | 3 +
> lib/librte_pmd_e1000/igb_ethdev.c | 228 +++++++++++--
> lib/librte_pmd_ixgbe/ixgbe_ethdev.c | 365
> ++++++++++++++++++++-
> lib/librte_pmd_ixgbe/ixgbe_ethdev.h | 6 +
> 13 files changed, 964 insertions(+), 114 deletions(-)
>
Series
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy at intel.com>
