netdev - Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s

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Message-ID: <1384885910.8604.110.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Tue, 19 Nov 2013 10:31:50 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Willy Tarreau <w@....eu>
Cc:	Arnaud Ebalard <arno@...isbad.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	netdev@...r.kernel.org, edumazet@...gle.com,
	Cong Wang <xiyou.wangcong@...il.com>,
	linux-arm-kernel@...ts.infradead.org,
	Florian Fainelli <f.fainelli@...il.com>,
	simon.guinot@...uanux.org
Subject: Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s

On Tue, 2013-11-19 at 18:43 +0100, Willy Tarreau wrote:

> - #define MVNETA_TX_DONE_TIMER_PERIOD 10
> + #define MVNETA_TX_DONE_TIMER_PERIOD (1000/HZ)
> 

I suggested this in a prior mail :

#define MVNETA_TX_DONE_TIMER_PERIOD 1

But apparently it was triggering strange crashes...

> This can only have any effect if you run at 250 or 1000 Hz, but not at 100
> of course. It should reduce the time to first IRQ.



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