Xen Development for Dummies.

Xen Development for Dummies.

[Jason Long]

Hello Folks.
I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?

Tnx.

Re: Xen Development for Dummies.

[Pasi Kärkkäinen]

On Fri, Feb 06, 2015 at 06:46:23AM +0000, Jason Long wrote:
> Hello Folks.
> I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?
>

Hello,

Xen is mostly written in C language, but there are other languages being used aswell.. obviously lowlevel assembly language for some architecture specific lowlevel stuff, and some highler level languages (OCaml) for certain components (oxenstored). Also various scripting languages are used, perl, python, etc. 

Also you need to know all the usual Linux/Unix commandline (development) tools.

-- Pasi

> 
> Tnx.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel

Re: Xen Development for Dummies.

[Jason Long]

Can you tell me why Ocaml used? What is the features of this language? Why not other?
Excuse me, I'm a beginner in programming and can you show me some books or reference step by step? I'm a dummies :(

Cheers.



On Thursday, February 5, 2015 11:59 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
On Fri, Feb 06, 2015 at 06:46:23AM +0000, Jason Long wrote:
> Hello Folks.
> I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?
>

Hello,

Xen is mostly written in C language, but there are other languages being used aswell.. obviously lowlevel assembly language for some architecture specific lowlevel stuff, and some highler level languages (OCaml) for certain components (oxenstored). Also various scripting languages are used, perl, python, etc. 

Also you need to know all the usual Linux/Unix commandline (development) tools.

-- Pasi


> 
> Tnx.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

Re: Xen Development for Dummies.

[Pasi Kärkkäinen]

On Fri, Feb 06, 2015 at 10:31:09AM +0000, Jason Long wrote:
> Can you tell me why Ocaml used? What is the features of this language? Why not other?
> Excuse me, I'm a beginner in programming and can you show me some books or reference step by step? I'm a dummies :(
>

There are two different versions of xenstore-daemon (xenstored). 
The earlier one, written in C, and the newer one, written in OCaml (oxenstored).

Note that this is just one of the many components in Xen. Most Xen components are written in C.

Here you have some slides about oxenstored:
http://gazagnaire.org/pub/GH09.pdf


-- Pasi
 
> Cheers.
> 
> 
> 
> On Thursday, February 5, 2015 11:59 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> On Fri, Feb 06, 2015 at 06:46:23AM +0000, Jason Long wrote:
> > Hello Folks.
> > I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?
> >
> 
> Hello,
> 
> Xen is mostly written in C language, but there are other languages being used aswell.. obviously lowlevel assembly language for some architecture specific lowlevel stuff, and some highler level languages (OCaml) for certain components (oxenstored). Also various scripting languages are used, perl, python, etc. 
> 
> Also you need to know all the usual Linux/Unix commandline (development) tools.
> 
> -- Pasi
> 
> 
> > 
> > Tnx.
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel

Re: Xen Development for Dummies.

[Jason Long]

In your opinion, Can a normal user like me become a developer? 
I must first start learning C or Ocaml? Can you recommend a book for both to me? 
Can you tell me why developers choose Ocaml and C? and not C++ or Python?

Cheers.



On Friday, February 6, 2015 2:46 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
On Fri, Feb 06, 2015 at 10:31:09AM +0000, Jason Long wrote:
> Can you tell me why Ocaml used? What is the features of this language? Why not other?
> Excuse me, I'm a beginner in programming and can you show me some books or reference step by step? I'm a dummies :(
>

There are two different versions of xenstore-daemon (xenstored). 
The earlier one, written in C, and the newer one, written in OCaml (oxenstored).

Note that this is just one of the many components in Xen. Most Xen components are written in C.

Here you have some slides about oxenstored:
http://gazagnaire.org/pub/GH09.pdf


-- Pasi


> Cheers.
> 
> 
> 
> On Thursday, February 5, 2015 11:59 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> On Fri, Feb 06, 2015 at 06:46:23AM +0000, Jason Long wrote:
> > Hello Folks.
> > I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?
> >
> 
> Hello,
> 
> Xen is mostly written in C language, but there are other languages being used aswell.. obviously lowlevel assembly language for some architecture specific lowlevel stuff, and some highler level languages (OCaml) for certain components (oxenstored). Also various scripting languages are used, perl, python, etc. 
> 
> Also you need to know all the usual Linux/Unix commandline (development) tools.
> 
> -- Pasi
> 
> 
> > 
> > Tnx.
> > 
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xen.org
> > http://lists.xen.org/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

Re: Xen Development for Dummies.

[Pasi Kärkkäinen]

On Fri, Feb 06, 2015 at 01:35:58PM +0000, Jason Long wrote:
> In your opinion, Can a normal user like me become a developer? 
> I must first start learning C or Ocaml? Can you recommend a book for both to me? 
> Can you tell me why developers choose Ocaml and C? and not C++ or Python?
>

Xen hypervisor, like any other hypervisor, is a very low level piece of software.
Lowlevel software tends to be written in lowlevel languages, such as C and assembler.

Like said most of Xen is written in C, so you need to learn/know C.

You should first start with learning programming with C language, and the generic concepts of computer hardware,
operating systems, kernels, memory management, etc.

Something like a hypervisor, or an operating system kernel, is a quite complex beast,
so you should probably first start with something much easier and learn C properly in an easier project.
When you know C and Linux/Unix internals well you can continue working on Xen aswell.


-- Pasi
 
> Cheers.
> 
> 
> 
> On Friday, February 6, 2015 2:46 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> On Fri, Feb 06, 2015 at 10:31:09AM +0000, Jason Long wrote:
> > Can you tell me why Ocaml used? What is the features of this language? Why not other?
> > Excuse me, I'm a beginner in programming and can you show me some books or reference step by step? I'm a dummies :(
> >
> 
> There are two different versions of xenstore-daemon (xenstored). 
> The earlier one, written in C, and the newer one, written in OCaml (oxenstored).
> 
> Note that this is just one of the many components in Xen. Most Xen components are written in C.
> 
> Here you have some slides about oxenstored:
> http://gazagnaire.org/pub/GH09.pdf
> 
> 
> -- Pasi
> 
> 
> > Cheers.
> > 
> > 
> > 
> > On Thursday, February 5, 2015 11:59 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> > On Fri, Feb 06, 2015 at 06:46:23AM +0000, Jason Long wrote:
> > > Hello Folks.
> > > I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?
> > >
> > 
> > Hello,
> > 
> > Xen is mostly written in C language, but there are other languages being used aswell.. obviously lowlevel assembly language for some architecture specific lowlevel stuff, and some highler level languages (OCaml) for certain components (oxenstored). Also various scripting languages are used, perl, python, etc. 
> > 
> > Also you need to know all the usual Linux/Unix commandline (development) tools.
> > 
> > -- Pasi
> > 
> > 
> > > 
> > > Tnx.
> > > 
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@lists.xen.org
> > > http://lists.xen.org/xen-devel

Re: Xen Development for Dummies.

[Jason Long]

Thank you.
Can you answer my previous questions about Ocaml and C? Why Ocaml is unique and which part of Xen use it?
I know my questions are silly but I'm a dummies and I looked at amazon.com and found Tons of C book but which one is good?

Cheers.



On Friday, February 6, 2015 5:14 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
On Fri, Feb 06, 2015 at 01:35:58PM +0000, Jason Long wrote:
> In your opinion, Can a normal user like me become a developer? 
> I must first start learning C or Ocaml? Can you recommend a book for both to me? 
> Can you tell me why developers choose Ocaml and C? and not C++ or Python?
>

Xen hypervisor, like any other hypervisor, is a very low level piece of software.
Lowlevel software tends to be written in lowlevel languages, such as C and assembler.

Like said most of Xen is written in C, so you need to learn/know C.

You should first start with learning programming with C language, and the generic concepts of computer hardware,
operating systems, kernels, memory management, etc.

Something like a hypervisor, or an operating system kernel, is a quite complex beast,
so you should probably first start with something much easier and learn C properly in an easier project.
When you know C and Linux/Unix internals well you can continue working on Xen aswell.


-- Pasi


> Cheers.
> 
> 
> 
> On Friday, February 6, 2015 2:46 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> On Fri, Feb 06, 2015 at 10:31:09AM +0000, Jason Long wrote:
> > Can you tell me why Ocaml used? What is the features of this language? Why not other?
> > Excuse me, I'm a beginner in programming and can you show me some books or reference step by step? I'm a dummies :(
> >
> 
> There are two different versions of xenstore-daemon (xenstored). 
> The earlier one, written in C, and the newer one, written in OCaml (oxenstored).
> 
> Note that this is just one of the many components in Xen. Most Xen components are written in C.
> 
> Here you have some slides about oxenstored:
> http://gazagnaire.org/pub/GH09.pdf
> 
> 
> -- Pasi
> 
> 
> > Cheers.
> > 
> > 
> > 
> > On Thursday, February 5, 2015 11:59 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:
> > On Fri, Feb 06, 2015 at 06:46:23AM +0000, Jason Long wrote:
> > > Hello Folks.
> > > I want to become a Xen developer and I don't have any knowledge about development. Can you tell me what programming language is needed? How can I start and etc?
> > >
> > 
> > Hello,
> > 
> > Xen is mostly written in C language, but there are other languages being used aswell.. obviously lowlevel assembly language for some architecture specific lowlevel stuff, and some highler level languages (OCaml) for certain components (oxenstored). Also various scripting languages are used, perl, python, etc. 
> > 
> > Also you need to know all the usual Linux/Unix commandline (development) tools.
> > 
> > -- Pasi
> > 
> > 
> > > 
> > > Tnx.
> > > 
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@lists.xen.org
> > > http://lists.xen.org/xen-devel

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel

Re: Xen Development for Dummies.

[Razvan Cojocaru]

On 02/06/2015 09:17 PM, Jason Long wrote:
> I know my questions are silly but I'm a dummies and I looked at amazon.com and found Tons of C book but which one is good?

"The C Programming Language", by Brian W. Kernighan and Dennis M.
Ritchie: http://cm.bell-labs.com/cm/cs/cbook/


Cheers,
Razvan

Re: Xen Development for Dummies.

[Jason Long]

Can anyone tell me why Citrix Developer choose Ocaml?



On Friday, February 6, 2015 12:02 PM, Razvan Cojocaru <rcojocaru@bitdefender.com> wrote:
On 02/06/2015 09:17 PM, Jason Long wrote:
> I know my questions are silly but I'm a dummies and I looked at amazon.com and found Tons of C book but which one is good?

"The C Programming Language", by Brian W. Kernighan and Dennis M.
Ritchie: http://cm.bell-labs.com/cm/cs/cbook/



Cheers,
Razvan

Re: Xen Development for Dummies.

[Ian Campbell]

On Sat, 2015-02-07 at 09:48 +0000, Jason Long wrote:
> Can anyone tell me why Citrix Developer choose Ocaml?

They thought it was a good fit for the problem at hand. More than that
(i.e. comparisons of the relative merits of various computer languages
for beginners) I'm afraid is not on topic for this list.

xen-devel is not a forum to learn about the basics of programming or
software development. To participate effectively people are expected to
have an existing basic knowledge in many of the subject areas
surrounding computer operating systems and programming languages.

I suggest you seek out a local computer users group (e.g. LUG), speak to
an advisor at your college (or a local college if you are not a student)
or seek out a more newbie orientated mailing list.

Ian.