Re: LMbench2.0 results

[William Lee Irwin III]

On Sat, Sep 07, 2002 at 09:20:56AM -0700, Andrew Morton wrote:
>>> The fork/exec/mmap slowdown is the rmap overhead.  I have some stuff
>>> which partialy improves it.

William Lee Irwin III wrote:
>> Hmm, Where does it enter the mmap() path? PTE instantiation is only done
>> for the VM_LOCKED case IIRC. Otherwise it should be invisible.

On Sat, Sep 07, 2002 at 04:12:49PM -0700, Andrew Morton wrote:
> Oh, is that just the mmap() call itself?

I'm not actually sure what lmbench is doing.

William Lee Irwin III wrote:
>> Perhaps testing with overcommit on would be useful.

On Sat, Sep 07, 2002 at 04:12:49PM -0700, Andrew Morton wrote:
> Well yes - the new overcommit code was a significant hit on the 16ways
> was it not?  You have some numbers on that?

I don't remember the before/after numbers, but I can collect some.

Cheers,
Bill