partcl pmc usage.

[Geoffrey Broadwell]

On Tue, 2008-12-30 at 11:28 -0500, Will Coleda wrote:
> On Tue, Dec 30, 2008 at 11:24 AM, Will Coleda <will at coleda.com> wrote:
> >    TOTAL_MEM_ALLOC............: 8266564
> >    ACTIVE_PMCS................: 2871369
> >    ACTIVE_BUFFERS.............: 2807713
> >    TOTAL_PMCS.................: 3096542
> >    TOTAL_BUFFERS..............: 2812089
> >    TOTAL_COPIED...............: 142490896
> >    EXTENDED_PMCS..............: 6506
> 
> For comparison, here's the sole run from the script [puts hi] :
> 
>     TOTAL_MEM_ALLOC............: 4350628
>     ACTIVE_PMCS................: 13046
>     ACTIVE_BUFFERS.............: 12811
>     TOTAL_PMCS.................: 23931
>     TOTAL_BUFFERS..............: 34053
>     TOTAL_COPIED...............: 4196048
>     EXTENDED_PMCS..............: 4742

I'm surprised that the ratio of TOTAL_MEM_ALLOC between the two cases is
much smaller than any other ratio, except EXTENDED_PMCS.  Just dividing
through, it looks like PMCs only are counting for a byte or two each,
which seems way off; are you sure they are not being multiply counted?
Or does TOTAL_MEM_ALLOC only include the PMC and BUFFER bodies and not
the headers?

What *is* an EXTENDED_PMC anyway?

Also, what is the unit for TOTAL_COPIED?  Is it a count of copy
operations, or of bytes, or ...?


-'f