Acked-by: Danny Zhou <danny.zhou at intel.com>
> -----Original Message-----
> From: Liang, Cunming
> Sent: Friday, June 05, 2015 4:20 PM
> To: dev at dpdk.org
> Cc: shemming at brocade.com; david.marchand at 6wind.com; thomas.monjalon at
> 6wind.com; Zhou, Danny; Wang, Liang-min;
> Richardson, Bruce; Liu, Yong; nhorman at tuxdriver.com; Liang, Cunming
> Subject: [PATCH v11 00/13] Interrupt mode PMD
>
> v11 changes
> - typo cleanup and check kernel style
>
> v10 changes
> - code rework to return actual error code
> - bug fix for lsc when using uio_pci_generic
>
> v9 changes
> - code rework to fix open comment
> - bug fix for igb lsc when both lsc and rxq are enabled in vfio-msix
> - new patch to turn off the feature by default so as to avoid v2.1 abi broken
>
> v8 changes
> - remove condition check for only vfio-msix
> - add multiplex intr support when only one intr vector allowed
> - lsc and rxq interrupt runtime enable decision
> - add safe event delete while the event wakeup execution happens
>
> v7 changes
> - decouple epoll event and intr operation
> - add condition check in the case intr vector is disabled
> - renaming some APIs
>
> v6 changes
> - split rte_intr_wait_rx_pkt into two APIs 'wait' and 'set'.
> - rewrite rte_intr_rx_wait/rte_intr_rx_set.
> - using vector number instead of queue_id as interrupt API params.
> - patch reorder and split.
>
> v5 changes
> - Rebase the patchset onto the HEAD
> - Isolate ethdev from EAL for new-added wait-for-rx interrupt function
> - Export wait-for-rx interrupt function for shared libraries
> - Split-off a new patch file for changed struct rte_intr_handle that
> other patches depend on, to avoid breaking git bisect
> - Change sample applicaiton to accomodate EAL function spec change
> accordingly
>
> 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. [FIXED]
> 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.
>
> Cunming Liang (13):
> eal/linux: add interrupt vectors support in intr_handle
> eal/linux: add rte_epoll_wait/ctl support
> eal/linux: add API to set rx interrupt event monitor
> eal/linux: fix comments typo on vfio msi
> eal/linux: add interrupt vectors handling on VFIO
> eal/linux: standalone intr event fd create support
> eal/linux: fix lsc read error in uio_pci_generic
> eal/bsd: dummy for new intr definition
> ethdev: add rx intr enable, disable and ctl functions
> ixgbe: enable rx queue interrupts for both PF and VF
> igb: enable rx queue interrupts for PF
> l3fwd-power: enable one-shot rx interrupt and polling/interrupt mode
> switch
> abi: fix v2.1 abi broken issue
>
> drivers/net/e1000/igb_ethdev.c | 311 ++++++++++--
> drivers/net/ixgbe/ixgbe_ethdev.c | 519
> ++++++++++++++++++++-
> drivers/net/ixgbe/ixgbe_ethdev.h | 4 +
> examples/l3fwd-power/main.c | 206 ++++++--
> lib/librte_eal/bsdapp/eal/eal_interrupts.c | 19 +
> .../bsdapp/eal/include/exec-env/rte_interrupts.h | 81 ++++
> lib/librte_eal/bsdapp/eal/rte_eal_version.map | 5 +
> lib/librte_eal/linuxapp/eal/eal_interrupts.c | 361 ++++++++++++--
> .../linuxapp/eal/include/exec-env/rte_interrupts.h | 219 +++++++++
> lib/librte_eal/linuxapp/eal/rte_eal_version.map | 8 +
> lib/librte_ether/rte_ethdev.c | 109 +++++
> lib/librte_ether/rte_ethdev.h | 132 ++++++
> lib/librte_ether/rte_ether_version.map | 4 +
> 13 files changed, 1853 insertions(+), 125 deletions(-)
>
> --
> 1.8.1.4
