On 2018年06月26日 13:17, [email protected] wrote:
From: Tonghao Zhang <[email protected]> This patch improves the guest receive performance from host. On the handle_tx side, we poll the sock receive queue at the same time. handle_rx do that in the same way. For avoiding deadlock, change the code to lock the vq one by one and use the VHOST_NET_VQ_XX as a subclass for mutex_lock_nested. With the patch, qemu can set differently the busyloop_timeout for rx or tx queue. We set the poll-us=100us and use the iperf3 to test its throughput. The iperf3 command is shown as below. on the guest: iperf3 -s -D on the host: iperf3 -c 192.168.1.100 -i 1 -P 10 -t 10 -M 1400 * With the patch: 23.1 Gbits/sec * Without the patch: 12.7 Gbits/sec Signed-off-by: Tonghao Zhang <[email protected]>
Thanks a lot for the patch. Looks good generally, but please split this big patch into separate ones like:
patch 1: lock vqs one by one patch 2: replace magic number of lock annotation patch 3: factor out generic busy polling logic to vhost_net_busy_poll() patch 4: add rx busy polling in tx path. And please cc Michael in v3. Thanks _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
