Do not inject IRQ when guest suppress it.
This can reduce IRQ injection further and bumps
host to guest bandwitdh to 6178.78 Mbps(cpu 63.96%).
Signed-off-by: Asias He <asias.hejun@xxxxxxxxx>
---
tools/kvm/virtio/core.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/virtio/core.c b/tools/kvm/virtio/core.c
index 0734984..2b3503d 100644
--- a/tools/kvm/virtio/core.c
+++ b/tools/kvm/virtio/core.c
@@ -60,6 +60,9 @@ u16 virt_queue__get_iov(struct virt_queue *queue, struct iovec iov[], u16 *out,
void virt_queue__trigger_irq(struct virt_queue *vq, int irq, u8 *isr, struct kvm *kvm)
{
+ if (vq->vring.avail->flags & VRING_AVAIL_F_NO_INTERRUPT)
+ return;
+
if (*isr == VIRTIO_IRQ_LOW) {
*isr = VIRTIO_IRQ_HIGH;
kvm__irq_line(kvm, irq, VIRTIO_IRQ_HIGH);
--
1.7.4.4
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
