From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: David Miller <davem@davemloft.net>
Cc: raghuram.kothakota@oracle.com, netdev@vger.kernel.org
Subject: Re: [PATCH net-next 0/2] sunvnet: Packet processing in non-interrupt context.
Date: Wed, 1 Oct 2014 16:23:15 -0400 [thread overview]
Message-ID: <20141001202315.GN17706@oracle.com> (raw)
In-Reply-To: <20141001.161508.1823792090990427608.davem@davemloft.net>
On (10/01/14 16:15), David Miller wrote:
> >
> > If I make this a NAPI driver that uses napi_gro_receive, I would
> > still have to deal with a budget, right?
>
> Absolutely, and YOU MUST, because the budget keeps one device from
> hogging the RX packet input path from other devices on a given cpu.
yes, but limiting the budget of sk_buffs read mid-way during descriptor
read is deadly to perf because of the ensuing LDC stop/start exchange -
ends up being even worse than the baseline.
Doesnt the netif_rx/process_backlog infra already do a napi_schedule,
thus avoiding the above concern?
--Sowmini
next prev parent reply other threads:[~2014-10-01 20:23 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-01 18:56 [PATCH net-next 0/2] sunvnet: Packet processing in non-interrupt context Sowmini Varadhan
2014-10-01 19:10 ` Eric Dumazet
2014-10-01 19:50 ` David Miller
2014-10-01 19:55 ` Sowmini Varadhan
2014-10-01 20:15 ` David Miller
2014-10-01 20:23 ` Sowmini Varadhan [this message]
2014-10-01 20:25 ` David Miller
2014-10-02 20:12 ` Sowmini Varadhan
2014-10-02 20:43 ` David Miller
2014-10-03 14:40 ` Sowmini Varadhan
2014-10-03 19:08 ` David Miller
2014-10-06 16:04 ` Sowmini Varadhan
2014-10-06 19:25 ` David Miller
2014-10-06 19:31 ` Sowmini Varadhan
2014-10-06 19:37 ` David Miller
2014-10-10 1:10 ` Raghuram Kothakota
2014-10-10 4:36 ` David Miller
2014-10-10 4:56 ` Raghuram Kothakota
2014-10-10 5:03 ` David Miller
2014-10-10 5:13 ` Raghuram Kothakota
2014-10-15 14:05 ` sunvnet NAPIfication Sowmini Varadhan
-- strict thread matches above, loose matches on Subject: below --
2014-10-01 20:24 [PATCH net-next 0/2] sunvnet: Packet processing in non-interrupt context Sowmini Varadhan
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