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Revert "virtio-devices: net: Improve throughput with virtio features"

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This reverts commit 58d25b3cccff967aa10a56f8f87692ca946aad7d.

This change introduced a regression when running iperf with the guest
running as the server:

marvin:~/src/cloud-hypervisor ((58d25b3c...))$ iperf  -c 192.168.249.2
------------------------------------------------------------
Client connecting to 192.168.249.2, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  1] local 192.168.249.1 port 47078 connected with 192.168.249.2 port 5001
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-10.40 sec  14.0 MBytes  11.3 Mbits/sec
marvin:~/src/cloud-hypervisor ((58d25b3c...))$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
[  1] local 192.168.249.1 port 5001 connected with 192.168.249.2 port 42866
[ ID] Interval       Transfer     Bandwidth
[  1] 0.00-10.01 sec  51.2 GBytes  44.0 Gbits/sec

Fixes: #3450

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-12-12 11:11:11 +00:00
parent 7444c3a0c5
commit 4959434219
1 changed files with 1 additions and 5 deletions
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6
virtio-devices/src/net.rs
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@ -34,9 +34,7 @@ use std::{collections::HashMap, convert::TryInto};
use versionize::{VersionMap, Versionize, VersionizeResult};
use versionize_derive::Versionize;
use virtio_bindings::bindings::virtio_net::*;
use virtio_bindings::bindings::virtio_ring::{
VIRTIO_RING_F_EVENT_IDX, VIRTIO_RING_F_INDIRECT_DESC,
};
use virtio_bindings::bindings::virtio_ring::VIRTIO_RING_F_EVENT_IDX;
use virtio_queue::Queue;
use vm_memory::{ByteValued, GuestMemoryAtomic};
use vm_migration::VersionMapped;
@ -400,9 +398,7 @@ impl Net {
| 1 << VIRTIO_NET_F_HOST_TSO4
| 1 << VIRTIO_NET_F_HOST_TSO6
| 1 << VIRTIO_NET_F_HOST_UFO
| 1 << VIRTIO_NET_F_MRG_RXBUF
| 1 << VIRTIO_RING_F_EVENT_IDX
| 1 << VIRTIO_RING_F_INDIRECT_DESC
| 1 << VIRTIO_F_VERSION_1;
if iommu {