From: David Miller <davem@davemloft.net>
To: makita.toshiaki@lab.ntt.co.jp
Cc: kvm@vger.kernel.org, mst@redhat.com, netdev@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: [PATCH v2 net-next 0/4] vhost_net: Avoid vq kicks during busyloop
Date: Wed, 04 Jul 2018 21:31:47 +0900 (KST) [thread overview]
Message-ID: <20180704.213147.556876353476580416.davem@davemloft.net> (raw)
In-Reply-To: <1530603094-2476-1-git-send-email-makita.toshiaki@lab.ntt.co.jp>
From: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Date: Tue, 3 Jul 2018 16:31:30 +0900
> Under heavy load vhost tx busypoll tend not to suppress vq kicks, which
> causes poor guest tx performance. The detailed scenario is described in
> commitlog of patch 2.
> Rx seems not to have that serious problem, but for consistency I made a
> similar change on rx to avoid rx wakeups (patch 3).
> Additionary patch 4 is to avoid rx kicks under heavy load during
> busypoll.
>
> Tx performance is greatly improved by this change. I don't see notable
> performance change on rx with this series though.
...
Series applied, thank you.
prev parent reply other threads:[~2018-07-04 12:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-03 7:31 [PATCH v2 net-next 0/4] vhost_net: Avoid vq kicks during busyloop Toshiaki Makita
2018-07-03 7:31 ` [PATCH v2 net-next 1/4] vhost_net: Rename local variables in vhost_net_rx_peek_head_len Toshiaki Makita
2018-07-03 9:03 ` Jason Wang
2018-07-03 7:31 ` [PATCH v2 net-next 2/4] vhost_net: Avoid tx vring kicks during busyloop Toshiaki Makita
2018-07-03 9:04 ` Jason Wang
2018-07-03 7:31 ` [PATCH v2 net-next 3/4] vhost_net: Avoid rx queue wake-ups during busypoll Toshiaki Makita
2018-07-03 7:31 ` [PATCH v2 net-next 4/4] vhost_net: Avoid rx vring kicks during busyloop Toshiaki Makita
[not found] ` <1530603094-2476-4-git-send-email-makita.toshiaki@lab.ntt.co.jp>
2018-07-04 3:26 ` [PATCH v2 net-next 3/4] vhost_net: Avoid rx queue wake-ups during busypoll Jason Wang
[not found] ` <1530603094-2476-5-git-send-email-makita.toshiaki@lab.ntt.co.jp>
2018-07-03 9:05 ` [PATCH v2 net-next 4/4] vhost_net: Avoid rx vring kicks during busyloop Jason Wang
2018-07-04 1:21 ` Toshiaki Makita
2018-07-04 3:26 ` Jason Wang
2018-07-04 3:27 ` Jason Wang
2018-07-04 5:35 ` [PATCH v2 net-next 0/4] vhost_net: Avoid vq " Michael S. Tsirkin
2018-07-04 12:31 ` David Miller [this message]
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