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

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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>
This commit is contained in:
Stefano Brivio 2021-09-09 15:32:24 +02:00
parent 3994fc8f58
commit e0530a802f
1 changed files with 1 additions and 1 deletions
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qrap.c
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@ -223,7 +223,7 @@ int main(int argc, char **argv)
if (has_dev) { if (has_dev) {
qemu_argv[qemu_argc++] = "-device"; 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); dev->name, dev->template, i, dev->template_post);
qemu_argv[qemu_argc++] = dev_str; qemu_argv[qemu_argc++] = dev_str;
} }