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SubjectRe: [RFC PATCH 0/3] Sharing MSIX irq for tx/rx queue pairs
On Fri, Dec 26, 2014 at 10:53:42AM +0800, Jason Wang wrote:
> Hi all:
>
> This series try to share MSIX irq for each tx/rx queue pair. This is
> done through:
>
> - introducing virtio pci channel which are group of virtqueues that
> sharing a single MSIX irq (Patch 1)
> - expose channel setting to virtio core api (Patch 2)
> - try to use channel setting in virtio-net (Patch 3)
>
> For the transport that does not support channel, channel paramters
> were simply ignored. For devices that does not use channel, it can
> simply pass NULL or zero to virito core.
>
> With the patch, 1 MSIX irq were saved for each TX/RX queue pair.
>
> Please review.

How does this sharing affect performance?


> Thanks
>
> Jason Wang (3):
> virtio-pci: introduce channels
> virtio: let vp_find_vqs accept channel setting paramters
> virtio-net: using single MSIX irq for each TX/RX queue pair
>
> drivers/block/virtio_blk.c | 3 +-
> drivers/char/virtio_console.c | 3 +-
> drivers/lguest/lguest_device.c | 5 +-
> drivers/misc/mic/card/mic_virtio.c | 5 +-
> drivers/net/caif/caif_virtio.c | 3 +-
> drivers/net/virtio_net.c | 26 ++++-
> drivers/remoteproc/remoteproc_virtio.c | 5 +-
> drivers/rpmsg/virtio_rpmsg_bus.c | 3 +-
> drivers/s390/kvm/kvm_virtio.c | 5 +-
> drivers/s390/kvm/virtio_ccw.c | 5 +-
> drivers/scsi/virtio_scsi.c | 3 +-
> drivers/virtio/virtio_balloon.c | 3 +-
> drivers/virtio/virtio_mmio.c | 5 +-
> drivers/virtio/virtio_pci_common.c | 207 ++++++++++++++++++++-------------
> drivers/virtio/virtio_pci_common.h | 19 ++-
> include/linux/virtio_config.h | 8 +-
> 16 files changed, 208 insertions(+), 100 deletions(-)
>
> --
> 1.8.3.1


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