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authorAlex Williamson <alex.williamson@redhat.com>2010-09-02 09:00:50 -0600
committerMichael S. Tsirkin <mst@redhat.com>2010-09-07 20:29:24 +0300
commitf0c07c7c7b4fe4f9b63c88341fd32707def5a058 (patch)
tree189a2c3e3a0a4877cf5e18c9e5968443eb3482c9 /hw/virtio-net.h
parentca736c8e748e3bf77abe401231a412b9cdccb9d3 (diff)
virtio-net: Make tx_timer timeout configurable
Add an option to make the TX mitigation timer adjustable as a device option. The 150us hard coded default used currently is reasonable, but may not be suitable for all workloads, this gives us a way to adjust it using a single binary. We can't support any random option though, so use the "x-" prefix to indicate this is a developer option. Usage: -device virtio-net-pci,x-txtimer=500000,... # .5ms timeout Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio-net.h')
-rw-r--r--hw/virtio-net.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/virtio-net.h b/hw/virtio-net.h
index 235f1a9fa8..46a2e1c57d 100644
--- a/hw/virtio-net.h
+++ b/hw/virtio-net.h
@@ -49,6 +49,11 @@
#define TX_TIMER_INTERVAL 150000 /* 150 us */
+typedef struct virtio_net_conf
+{
+ uint32_t txtimer;
+} virtio_net_conf;
+
/* Maximum packet size we can receive from tap device: header + 64k */
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))