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From: Jan Vrany <jan.vrany@fit.cvut.cz>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: linux-riscv@lists.infradead.org, Boris Shingarov <boris@shingarov.com>
Subject: Re: Ethernet performance issue on HiFive Unleashed with kernel 4.20
Date: Tue, 15 Jan 2019 09:20:16 +0000	[thread overview]
Message-ID: <5dbe411eecfed2a1bb60db4afd65265904111604.camel@fit.cvut.cz> (raw)
In-Reply-To: <878szneeao.fsf@igel.home>

On Mon, 2019-01-14 at 11:14 +0100, Andreas Schwab wrote:
> I have already moved to 5.0-rc1, so here is the updated config.
> 

Thabks a lot! 

I think I found the problem.. The issue  was that RX/TX rings were
for some reason too small: 

root@unleashed:~# ethtool -g eth0
Ring parameters for eth0:
Pre-set maximums:
RX:             8192
RX Mini:        0
RX Jumbo:       0
TX:             4096
Current hardware settings:
RX:             512
RX Mini:        0
RX Jumbo:       0
TX:             512

Setting them to max before bringing the interface up
seem to solve the problem:

ethtool -G eth0 rx 8192
ethtool -G eth0 tx 4096

Thanks for your help! 

Jan


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  reply	other threads:[~2019-01-15  9:20 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-11 12:12 Ethernet performance issue on HiFive Unleashed with kernel 4.20 Jan Vrany
2019-01-11 13:15 ` Andreas Schwab
2019-01-13 23:03   ` Jan Vrany
2019-01-14 10:14     ` Andreas Schwab
2019-01-15  9:20       ` Jan Vrany [this message]
2019-01-15 19:57         ` Andreas Schwab

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