On Wed, Aug 26, 2020 at 10:42 PM Eugenio Pérez <epere...@redhat.com> wrote:
> This improves performance in case of netperf with vhost-net:
> * TCP_STREAM: From 9049.59Mbit/s to 9049.59Mbit/s (13%)
>
What's improvement ? they are the same
> * TCP_RR: From 8464.73 trans/s to 8932.703333 trans/s (5.5%)
> * UDP_RR: From 8562.08 trans/s to 9005.62/s (5.1%)
> * UDP_STREAM: No change observed (insignificant 0.1% improvement)
>
> Signed-off-by: Eugenio Pérez <epere...@redhat.com>
> ---
> hw/i386/intel_iommu.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
> index ddb828da1f..7620a1abbf 100644
> --- a/hw/i386/intel_iommu.c
> +++ b/hw/i386/intel_iommu.c
> @@ -1960,6 +1960,12 @@ static void
> vtd_iotlb_domain_invalidate(IntelIOMMUState *s, uint16_t domain_id)
> vtd_iommu_unlock(s);
>
> QLIST_FOREACH(vtd_as, &s->vtd_as_with_notifiers, next) {
> + if (vtd_as->iommu.iommu_notify_flags & IOMMU_NOTIFIER_DEVIOTLB) {
> + /* If IOMMU memory region is DEVICE IOTLB type, it does not
> make
> + * sense to send regular IOMMU notifications. */
> + continue;
> + }
> +
> if (!vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus),
> vtd_as->devfn, &ce) &&
> domain_id == vtd_get_domain_id(s, &ce)) {
> --
> 2.18.1
>
>
>
--
此致
礼
罗勇刚
Yours
sincerely,
Yonggang Luo
