harmony-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alexei Fedotov" <alexei.fedo...@gmail.com>
Subject Re: [drlvm][startup][performance][classloader] mapping bootstrap jars directly into memory (HARMONY-5281)
Date Thu, 13 Mar 2008 11:01:23 GMT
Thanks, Pavel!
I believe that your idea of making a questionable option configurable
is the best way to resolve these concerns.

On Tue, Mar 11, 2008 at 4:13 PM, Pavel Pervov <pmcfirst@gmail.com> wrote:
> Xiao-Feng,
>
>  Yes, in the patch I've also added command line option to change that
>  behaviour (actually, patch _adds_ jar mapping, not _changes_ file
>  reads to mapping).
>  I made it on by default in the patch but I can change it to off before
>  committing and keep this functionality as a potential performance
>  optimization on some scenarios.
>
>  Pavel.
>
>
>
>  On 3/7/08, Xiao-Feng Li <xiaofeng.li@gmail.com> wrote:
>  > On Fri, Mar 7, 2008 at 6:42 PM, Nataly Naumova
>  > <natalya.s.naumova@gmail.com> wrote:
>  > > Tim,
>  > >
>  > >  I've measured the startup performance for simple applications, speedup
>  > >  was ~2-3% on simple graphics aplication with lots of AWT/SWING
>  > >  classes. But I think the idea is quite pretty, because of we get rid
>  > >  of a big amount of system calls, such as lseek, read etc. As we're
>  > >  working just with pointers directly.
>  >
>  > Can it be a runtime option chosen by the user?
>  >
>  > Thanks,
>  > xiaofeng
>  > >
>  > >
>  > >  On Thu, Mar 6, 2008 at 7:45 PM, Tim Ellison <t.p.ellison@gmail.com>
wrote:
>  > >  > Pavel Pervov (JIRA) wrote:
>  > >  >  > Please, note, that memory footprint of DRLVM will increase by
size of
>  > >  >  > JRE, namely, ~20 megs.
>  > >  >
>  > >  >  Eek, that's quite significant!  What's the speed-up by doing this?
>  > >  >
>  > >  >  Regards,
>  > >  >  Tim
>  > >  >
>  > >
>  > >
>  > >
>  > >  --
>  > >  Nataly Naumova,
>  > >  Intel Middleware Products Division
>  > >
>  >
>  >
>  >
>  > --
>  > http://xiao-feng.blogspot.com
>  >
>
>
>
>
> --
>  Pavel Pervov,
>  Intel Enterprise Solutions Software Division
>



-- 
With best regards,
Alexei

Mime
View raw message