How to increase the Xen heap

How to increase the Xen heap

[alex]

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Hi all,

I wrote some code in Xen hypervisor. It allocates an array to track the
runtime statistics. When I use _xmalloc to allocate the array from xen heap,
it fails with "No enough memory". I check the Xen heap via "xm dmesg", it
shows 9MB, while the size of the array is around 14MB. I try to reduce the
array size, it succeed without any problem and works correctly. My question
is how to increase the Xen heap because I will put other fields into array
data structure. Or can I allocate from dom heap? If that, are there some
sample code?

Thank you.

Alex

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Re: How to increase the Xen heap

[alex]

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I am using 32-bit Xen and Xen heap is limited in size.


On Tue, Aug 10, 2010 at 11:25 PM, alex <leiye.xen@gmail.com> wrote:

> Hi all,
>
> I wrote some code in Xen hypervisor. It allocates an array to track the
> runtime statistics. When I use _xmalloc to allocate the array from xen heap,
> it fails with "No enough memory". I check the Xen heap via "xm dmesg", it
> shows 9MB, while the size of the array is around 14MB. I try to reduce the
> array size, it succeed without any problem and works correctly. My question
> is how to increase the Xen heap because I will put other fields into array
> data structure. Or can I allocate from dom heap? If that, are there some
> sample code?
>
> Thank you.
>
> Alex
>

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Re: How to increase the Xen heap

[Keir Fraser]

You cannot increase the size of 32-bit Xen heap. You need to run 64-bit Xen.

 -- Keir

On 11/08/2010 07:33, "alex" <leiye.xen@gmail.com> wrote:

> I am using 32-bit Xen and Xen heap is limited in size.
> 
>  
> On Tue, Aug 10, 2010 at 11:25 PM, alex <leiye.xen@gmail.com> wrote:
>> Hi all,
>>  
>> I wrote some code in Xen hypervisor. It allocates an array to track the
>> runtime statistics. When I use _xmalloc to allocate the array from xen heap,
>> it fails with "No enough memory". I check the Xen heap via "xm dmesg", it
>> shows 9MB, while the size of the array is around 14MB. I try to reduce the
>> array size, it succeed without any problem and works correctly. My question
>> is how to increase the Xen heap because I will put other fields into array
>> data structure. Or can I allocate from dom heap? If that, are there some
>> sample code? 
>>  
>> Thank you.
>>  
>> Alex
> 
>