qrap: Set x-txburst as temporary workaround for virtio-net TX stall

Flooding a virtio-net interface connected to a socket back-end results
in a TX stall I'm still debugging. The stall goes away by setting a
higher value for x-txburst (256 by default).

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/qrap.c b/qrap.c
index 7df5a40..1be1be7 100644
--- a/qrap.c
+++ b/qrap.c
@@ -223,7 +223,7 @@ int main(int argc, char **argv)
 
 	if (has_dev) {
 		qemu_argv[qemu_argc++] = "-device";
-		snprintf(dev_str, ARG_MAX, "%s,%s%x%s,netdev=hostnet0",
+		snprintf(dev_str, ARG_MAX, "%s,%s%x%s,netdev=hostnet0,x-txburst=4096",
 			 dev->name, dev->template, i, dev->template_post);
 		qemu_argv[qemu_argc++] = dev_str;
 	}