How could I allocate a huge memory in rtdm driver?

孙世龙 sunshilong369 at
Mon Apr 13 11:07:42 CEST 2020

Hi Meng,

    Thanks a lot for your reply.
     I will follow your advice not to throw out multi questions at once
any more.

     I have some industry PCs in hand which allready installed xenoami. I
use vmware to verify my code.
     It's more convenient to use word etc on windows while ubuntu installed
in vmwareis used for coding.

     The huge memory to be allocated will be used to store high
definitionvideo to be processed later .Though many image
processing algorithmsrequire contiguous memory, I do not need
contiguous memory indeed.

     Best regards.
Meng, Fino <fino.meng at> 于2020年4月13日周一 下午4:19写道:

> > From: Xenomai <xenomai-bounces at> On Behalf Of ??? via
> > Xenomai
> > Sent: Monday, April 13, 2020 3:21 PM
> > To: xenomai <xenomai at>
> > Subject: How could I allocate a huge memory in rtdm driver?
> >
> > Hi,
> >      I am using xenomai 3.1.
> >
> >      How could I allocate a huge memory which may be larger then 50MB in
> > rtdm driver?
> >
> >      I have tried rtdm_malloc function,but it returns NULL.
> >
> >     To provide the operating system a large amount of free memory, I do
> this
> > test when the ubuntu is started at once in vmware.
> >
> >     Best regards.
> Hi Shilong,
> Which kind of application u want to do? If u throw out multi questions at
> once, we may hard to catch,
> Run a ubuntu in vmware cannot get correct real-time performance,
> And a normal PC mainboard's BIOS usually cannot match real-time profile
> also.
> we can recommend some Industry PC module available on market if u want to
> test,
> BR / Fino (孟祥夫)
> Intel – IOTG Developer Enabling

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