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From Egor Pasko <egor.pa...@gmail.com>
Subject Re: [testing] optimization regressions (was: Re: [result] Re: [vote] HARMONY-1363 - DRLVM fixes and additions)
Date Mon, 18 Sep 2006 05:00:57 GMT
On the 0x1E5 day of Apache Harmony Pavel Ozhdikhin wrote:
> Thanks for explaining. This is another variant of the bytecode-based
> regression tests.

This variant is also adoptable to Java-based and IR-based regression tests.

> On 15 Sep 2006 17:53:00 +0700, Egor Pasko <egor.pasko@gmail.com> wrote:
> >
> > On the 0x1E5 day of Apache Harmony Pavel Ozhdikhin wrote:
> > >  Egor,
> > >
> > > How Nullstone tests differ from what Rana proposed and Mikhail L.
> > prototyped
> > > - could you please elaborate?
> >
> > the idea is simple. You have two versions of a test. First --
> > unoptimized, second -- same algorithm, but optimized by hand with a
> > specific optimization. If the times of execution differ much, then,
> > the optimization is not done properly in the checked compiler.
> >
> > It works best with optimizations that are easy to represent in a
> > high-level language (i.e. Java), such as "load hoisting", "loop
> > unrolling", etc.
> >
> > see http://www.nullstone.com for more info
> >
> > --
> > Egor Pasko, Intel Managed Runtime Division
> >
> >
> > ---------------------------------------------------------------------
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> >
> >

-- 
Egor Pasko, Intel Managed Runtime Division


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