harmony-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mikhail Fursov" <mike.fur...@gmail.com>
Subject Re: [DRLVM][GC] (HARMONY-2398) patch for GCv5 alloc helper inlining
Date Tue, 05 Dec 2006 12:35:48 GMT
If you compare performance of allocation - allocation fast path helper code
is all you need.
And we need to check performance not with microtests, but use real
benchmarks. Microtests can hide cache misses in our example.

On 12/5/06, Ivan Volosyuk <ivan.volosyuk@gmail.com> wrote:
>
> Helper code is equal. GC code is not. Lets compare apples with oranges.
> --
> Ivan
>
> On 12/5/06, Mikhail Fursov <mike.fursov@gmail.com> wrote:
> > The helpers code is equal, except this load. So if we have different
> > performance -> this extra memory access is the cause.
> >
> > On 12/5/06, Ivan Volosyuk <ivan.volosyuk@gmail.com> wrote:
> > >
> > > I think in order to do this comparison, other conditions should be
> > > equal. Comparing helper with 1 dependent load in gc_cc and helper with
> > > 2 dependent loads in gc_v5 makes no sense to me.
>



-- 
Mikhail Fursov

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message