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Date:      Tue, 14 Jun 2016 20:52:09 +0200
From:      Ilya Bakulin <ilya@bakulin.de>
To:        Russell Haley <russ.haley@gmail.com>, Gergely Imreh <imrehg@gmail.com>
Cc:        FreeBSD ARM <freebsd-arm@freebsd.org>
Subject:   Re: RPi2 i/o blocking and SD card performance
Message-ID:  <29c90ef2-f014-fd45-fa9b-55a933d0aad0@bakulin.de>
In-Reply-To: <CABx9NuQVgCkT3u_jfLA=iML4nnCRRGLfrcUO%2BTRXbD2B9ChRqA@mail.gmail.com>
References:  <CAJ3iQcoc5nVSFz3JKMG_Y9Q9k4PFizmp2rf3vfA7nv=u_12nBQ@mail.gmail.com> <CABx9NuQVgCkT3u_jfLA=iML4nnCRRGLfrcUO%2BTRXbD2B9ChRqA@mail.gmail.com>

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From: Ilya Bakulin <ilya@bakulin.de>
To: Russell Haley <russ.haley@gmail.com>, Gergely Imreh <imrehg@gmail.com>
Cc: FreeBSD ARM <freebsd-arm@freebsd.org>
Message-ID: <29c90ef2-f014-fd45-fa9b-55a933d0aad0@bakulin.de>
Subject: Re: RPi2 i/o blocking and SD card performance
References: <CAJ3iQcoc5nVSFz3JKMG_Y9Q9k4PFizmp2rf3vfA7nv=u_12nBQ@mail.gmail.com>
 <CABx9NuQVgCkT3u_jfLA=iML4nnCRRGLfrcUO+TRXbD2B9ChRqA@mail.gmail.com>
In-Reply-To: <CABx9NuQVgCkT3u_jfLA=iML4nnCRRGLfrcUO+TRXbD2B9ChRqA@mail.gmail.com>

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On 09/06/16 20:57, Russell Haley wrote:

> On Thu, Jun 9, 2016 at 2:37 AM, Gergely Imreh <imrehg@gmail.com> wrote:=

>> Hi,
>>
>> I've been testing FreeBSD 11.0-CURRENT on a RaspberryPi2. I'm relative=
ly
>> new to FreeBSD, and wondering if there's any advice for improving the
>> performance a bit.
>>
>> I wonder if the new CAM based SDIO subsystem is any faster?
>>
>>
It should be, in theory. In practice, I haven't measured that yet.
The new stack is still missing support for high-speed cards.
Although it's trivial to switch both the stack and the card to HS mode
from the userland via camcontrol.

I just haven't had time to do such tests, and in general work on the
stack during the last three months due to ENOTIME.

--
Ilya



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