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Date: Thu, 13 Sep 2012 13:13:37 -0700
Message-ID: <CAGH67wQrHE4r=hwed=g--VckzFnOQ7szLeW5Hpbn=K6-wzib7Q@mail.gmail.com>
From: Garrett Cooper <yanegomi@gmail.com>
To: matt <sendtomatt@gmail.com>
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Cc: Achim Patzner <ap@bnc.net>, Andrey Zonov <zont@freebsd.org>,
	freebsd-current@freebsd.org
Subject: Re: mfi driver performance
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On Thu, Sep 13, 2012 at 12:54 PM, matt <sendtomatt@gmail.com> wrote:
> On 09/10/12 19:31, Garrett Cooper wrote:

...

> It seems hw.mfi.max_cmds is read only. The performance is pretty close to
> expected with no nvram or bbu on this card and commodity disks from 1.5
> years ago, as far as I'm concerned. I'd love better write performance, but
> it's probably being held back by the single platter in the mirror when it is
> writing far from its edge.

Try loader.conf:

$ grep -r hw.mfi.max_cmds /sys/dev/mfi/
/sys/dev/mfi/mfi.c:TUNABLE_INT("hw.mfi.max_cmds", &mfi_max_cmds);

Cheers,
-Garrett