[Xenomai] x86 xenomai-2.6.4 linux-3.10.32 with i915 enble and CONFIG_PCI_MSI enble

[Xenomai] x86 xenomai-2.6.4 linux-3.10.32 with i915 enble and CONFIG_PCI_MSI enble

[eric]

Hi Gilles：
            I have a proble with  Intel(R) Atom(TM) CPU  E3827  @ 1.74GHz . We have fpga on pcie and fpga give  250us interrupt signal to our task . The  interrupt type is   MSI  .The proble is when we start gpu test glxgears the task  latency just 15us when we start without glxgears the latency is about 120us  . We tested a week‘s  time always the same situation. We don’t know why？ Thanks！！！






                                                                                                                                                                    eric

Re: [Xenomai] x86 xenomai-2.6.4 linux-3.10.32 with i915 enble and CONFIG_PCI_MSI enble

[Gilles Chanteperdrix]

On Tue, Aug 11, 2015 at 04:47:26PM +0800, eric wrote:
> Spam detection software, running on the system "sd-51317.xenomai.org", has
> identified this incoming email as possible spam.  The original message
> has been attached to this so you can view it (if it isn't spam) or label
> similar future email.  If you have any questions, see
> the administrator of that system for details.
> 
> Content preview:  Hi Gilles£º I have a proble with Intel(R) Atom(TM) CPU E3827
>    @ 1.74GHz . We have fpga on pcie and fpga give 250us interrupt signal to
>   our task . The interrupt type is MSI .The proble is when we start gpu test
>    glxgears the task latency just 15us when we start without glxgears the latency
>    is about 120us . We tested a week¡®s time always the same situation. We don¡¯t
>    know why£¿ Thanks£¡£¡£¡ [...] 
> 
> Content analysis details:   (5.0 points, 4.3 required)
> 
>  pts rule name              description
> ---- ---------------------- --------------------------------------------------
>  0.5 RCVD_IN_DNSWL_NONE     RBL: Sender listed at http://www.dnswl.org/, no
>                             trust
>                             [220.181.13.63 listed in list.dnswl.org]
>  0.0 FREEMAIL_FROM          Sender email is commonly abused enduser mail provider
>                             (ericvic[at]163.com)
> -0.1 SPF_PASS               SPF: sender matches SPF record
> -0.2 RP_MATCHES_RCVD        Envelope sender domain matches handover relay domain
>  2.0 HTML_MESSAGE           BODY: HTML included in message
>  3.0 BAYES_50               BODY: Bayes spam probability is 40 to 60%
>                             [score: 0.4259]
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> Date: Tue, 11 Aug 2015 16:47:26 +0800 (CST)
> From: eric <ericvic@163.com>
> To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>,
>  xenomai@xenomai.org
> Subject: x86 xenomai-2.6.4 linux-3.10.32  with i915 enble  and
>  CONFIG_PCI_MSI enble
> X-Mailer: Coremail Webmail Server Version SP_ntes V3.5 build
>  20150803(72677.7612) Copyright (c) 2002-2015 www.mailtech.cn 163com
> 
> Hi Gilles：I have a proble with Intel(R) Atom(TM) CPU E3827 @
>             1.74GHz . We have fpga on pcie and fpga give 250us
>             interrupt signal to our task . The interrupt type is
>             MSI .The proble is when we start gpu test glxgears the
>             task latency just 15us when we start without glxgears
>             the latency is about 120us . We tested a week‘s time
>             always the same situation. We don’t know why？
>             Thanks！！！

Hi, I do not answer for free to private support requests. If you
want support for free, then please use the mailing list. If you are
looking for consulting, then let us first agree on what you are
looking for exactly.

-- 
					    Gilles.
https://click-hack.org

Re: [Xenomai] x86 xenomai-2.6.4 linux-3.10.32 with i915 enble and CONFIG_PCI_MSI enble

[Gilles Chanteperdrix]

On Tue, Aug 11, 2015 at 09:44:57PM +0200, Gilles Chanteperdrix wrote:
> On Tue, Aug 11, 2015 at 04:47:26PM +0800, eric wrote:
> > Hi Gilles：I have a proble with Intel(R) Atom(TM) CPU E3827 @
> >             1.74GHz . We have fpga on pcie and fpga give 250us
> >             interrupt signal to our task . The interrupt type is
> >             MSI .The proble is when we start gpu test glxgears the
> >             task latency just 15us when we start without glxgears
> >             the latency is about 120us . We tested a week‘s time
> >             always the same situation. We don’t know why？
> >             Thanks！！！
> 
> Hi, I do not answer for free to private support requests. If you
> want support for free, then please use the mailing list. If you are
> looking for consulting, then let us first agree on what you are
> looking for exactly.

Sorry, you actually used the list. Seems like I just made a fool of
myself.

The answer is to use the I-pipe trace.

-- 
					    Gilles.
https://click-hack.org