Re: [PATCH] Move some variables into the "most_readonly" section??

On Fri, 17 Jun 2005, Anton Blanchard wrote:

> > I think it would be better to first still see numbers for
> > this questionable optimizations.
> 
> Agreed, it would be nice to see some benchmark numbers.

Sorry seem to have lost track of this thread of thought.

These are optimizations that try to avoid false aliasing as
a result of the linker placing hot spots into the same cacheline. These
are not predictable per se. Some future patch may rearrange variables that 
then produce another case of false aliasing.

In order to demonstrate the effect, I would need to be allowed to put 
some hot variables into the same cacheline. And that seem to be pointless 
because we all know the outcome.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • [PATCH] Move some variables into the "most_readonly" section??
    • From: christoph <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: Andi Kleen <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: christoph <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: Andrew Morton <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: christoph <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: Andrew Morton <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: christoph <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: Andrew Morton <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: Andi Kleen <[email protected]>
  • Re: [PATCH] Move some variables into the "most_readonly" section??
    • From: Anton Blanchard <[email protected]>

• Prev by Date: Re: reiser4 merging action list
• Next by Date: Re: [DVB patch 21/51] ttusb-dec: kfree cleanup
• Previous by thread: Re: [PATCH] Move some variables into the "most_readonly" section??
• Next by thread: Re: [PATCH] Move some variables into the "most_readonly" section??
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]