Re: [Valgrind-users] using valgrind at specific point while running program

[Vasily G. <vas...@gm...>]

Hello, Mr. Naderan.

What particular tool would you like to use (Memcheck, Callgrind, Massif)?
If callgrind - you can switch off instrumentation at the start and then
switch it on at some particular point (or time). In any case, at first -
please test your program with:
valgrind --tool=none ./path-to-your-program
If it spends a lot of time then probably Valgrind (like Memcheck, Massif,
etc) is useless for you because of time constrains.
I mean: None - is the fastest tool of Valgrind. It doesn't detect any
errors, simply run your code.
If it runs quite fast (for you) and you want to collect only call-graph
(use Callgrind) - then you can look at parameters for Callgrind.

Vasily


On Mon, Aug 26, 2013 at 12:00 PM, Mahmood Naderan <nt_...@ya...>wrote:

> Thanks. To be honest, I didn't understand!
> It seems that with these macros, I can insert them in the specific section
> of the code. However my problem is different. There are iterative
> functions. So I want to start valgrind after, say, 0.5 hours of execution
> to see what is going on.
>
>
> Regards,
> Mahmood
>
>
>
> ----- Original Message -----
> From: Konstantin Tokarev <an...@ya...>
> To: Mahmood Naderan <nt_...@ya...>; "
> val...@li..." <
> val...@li...>
> Cc:
> Sent: Monday, August 26, 2013 12:17 PM
> Subject: Re: [Valgrind-users] using valgrind at specific point while
> running program
>
>
>
> 26.08.2013, 11:45, "Mahmood Naderan" <nt_...@ya...>:
> > I want to use valrgind at a specific time while my program is running.
> For example, when I use -O3 it will take 0.5 hours to reach the desired
> point. When I use -g -ggdb it will take nearly 2.5 hours to reach the
> desired point.
> >
> > Now if I use valgrind with -g -ggdb, the program is extremely slow and I
> can not predict when it reach the desired point.
> > What should I do?
>
> Use client requests:
>
> http://valgrind.org/docs/manual/manual-core-adv.html
>
> --
> Regards,
> Konstantin
>
>
>
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-- 
Best Regards,
Vasily