Re: Parallel copy

On Tue, Feb 18, 2020 at 06:51:29PM +0530, Amit Kapila wrote:
> On Tue, Feb 18, 2020 at 5:59 PM Ants Aasma <ants(at)cybertec(dot)at> wrote:
> >
> > On Tue, 18 Feb 2020 at 12:20, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> > > This is something similar to what I had also in mind for this idea. I
> > > had thought of handing over complete chunk (64K or whatever we
> > > decide). The one thing that slightly bothers me is that we will add
> > > some additional overhead of copying to and from shared memory which
> > > was earlier from local process memory. And, the tokenization (finding
> > > line boundaries) would be serial. I think that tokenization should be
> > > a small part of the overall work we do during the copy operation, but
> > > will do some measurements to ascertain the same.
> >
> > I don't think any extra copying is needed.
>
> I am talking about access to shared memory instead of the process
> local memory. I understand that an extra copy won't be required.

Isn't accessing shared memory from different pieces of execution what
threads were designed to do?

Best,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778

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