Re: [Valgrind-users] multiple cores being used?

[Philippe W. <phi...@sk...>]

On Tue, 2013-04-23 at 13:08 -0700, Brian Budge wrote:


>         Some prototyping was done of a non serialised valgrind.
>         See https://bugs.kde.org/show_bug.cgi?id=301830
>         and the MTV branch in svn.
>         This prototype is not usable in its current state: only the
>         none tool was used. There are still many thread unsafe things.
>         The performance of the memcheck data structures is a.o. a
>         difficult
>         problem to look at.
>         
>         Philippe
>         
>         
> Hi Philippe -
> 
> 
> I can definitely understand  that :)  I wasn't really suggesting that
> it should do so (though, of course, any performance improvement would
> be great).  I was more just confused that memcheck was using so many
> cores concurrently.
Yes, it is not very understandable, unless you have a lot
of threads, with many of them executing (heavy) system calls.
(but I am still amazed that you could obtain something like 1000%
of cpu).

Philippe