netdev - Re: significant napi_gro

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Message-ID: <53345A6C.5080008@redhat.com>
Date:	Thu, 27 Mar 2014 18:05:48 +0100
From:	Michal Schmidt <mschmidt@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	netdev@...r.kernel.org, Jerry Chu <hkchu@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: significant napi_gro_frags() slowdown

Dne 27.3.2014 17:47, Eric Dumazet napsal:
> On Thu, 2014-03-27 at 17:39 +0100, Michal Schmidt wrote:
>> I received a report about a performance regression on a simple workload
>> of receiving a single TCP stream using a be2net NIC. Previously the
>> reporter was able to reach more than 9 Gb/s, but now he sees less than 7
>> Gb/s.
>
> Yeah, we are aware of this, and we had some discussions, but not yet got
> a fix.
>
> Are you running a 64 or 32bit kernel BTW ?

Both my reporter and I are running 64bit kernels.

Thanks,
Michal

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