netdev - Re: Regarding bottlenecks for high speed packet generation

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Message-ID: <CADAe=+LSeTWTnDk3o46EiLMQqJ6q93yVP_D3J2Ufcfy-_cv6RA@mail.gmail.com>
Date:	Fri, 26 Oct 2012 11:42:28 +0530
From:	Ajith Adapa <adapa.ajith@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	danborkmann@...earbox.net, netdev@...r.kernel.org
Subject: Re: Regarding bottlenecks for high speed packet generation

> >
> > But does NAPI comes into picture in case of transmission of packets ?
>
> Reclaim of TX descriptors occurs via NAPI.

You mean for every packet sent by the NIC card it drops a interrupt to
reclaim the TX buffers used ?
I am not able to understand why does NIC has to interrupt back instead
of freeing the memory in background.

Might be it does add some bottleneck in my case of transmitting traffic bursts.

Regards,
Ajith
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