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why tx_queue_size must be 256 for non-vhost-user tap nic
From
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yue
Subject
:
why tx_queue_size must be 256 for non-vhost-user tap nic
Date
:
Thu, 30 Dec 2021 19:52:37 +0800 (CST)
Hi, all:
I tried to test the effort of nic queue's ring-size, but nic' tx vring-size is always 256. finally i found the code.
could you tell why ?
thanks
-----
n->net_conf.tx_queue_size = MIN(virtio_net_max_tx_queue_size(n),
n->net_conf.tx_queue_size);
n->net_conf.tx_queue_size is 256 if peer->info->type != NET_CLIENT_DRIVER_VHOST_USER.
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