From: bgat@billgatliff.com (Bill Gatliff)
To: linux-arm-kernel@lists.infradead.org
Subject: Support Question
Date: Thu, 20 May 2010 12:18:06 -0500 [thread overview]
Message-ID: <4BF56ECE.9030303@billgatliff.com> (raw)
In-Reply-To: <AANLkTin9qYxhbKe_ZDFvPbteM6Zn1H2M5jY6mAaH_Jxu@mail.gmail.com>
On 05/19/2010 12:06 PM, Amit kumar wrote:
>
>
> Therefore I don;t have any idea from where the delay is being
> introduced. Is it a problem of OS or there is nythng else involved .
> Kindly guide me through this . I need urgent help .... any information
> abt delay is welcome.
The SPI drivers usually have a kernel thread to deal with transmissions
and chip selects. Make sure that kernel thread is on the RT scheduler,
otherwise it gets prioritized along with user applications--- which
would explain the delay you are seeing.
b.g.
--
Bill Gatliff
bgat at billgatliff.com
prev parent reply other threads:[~2010-05-20 17:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1274199223.1763.0.camel@ubuntu.ubuntu-domain>
2010-05-19 17:06 ` Support Question Amit kumar
2010-05-20 13:11 ` Nicolas Ferre
2010-05-20 17:18 ` Bill Gatliff [this message]
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