Re: [PATCH RT 00/02] SLOB optimizations

[Steven Rostedt]

On Tue, 20 Dec 2005, Ingo Molnar wrote:
> > Tests:
> > =====
>
> could you also post the output of 'size mm/slob.o', with and without
> these patches, with CONFIG_EMBEDDED and CONFIG_CC_OPTIMIZE_FOR_SIZE
> enabled? (and with all debugging options disabled) Both the UP and the
> SMP overhead would be interesting to see.
>

Well, there is definitely a hit there:

rt (slob new):
size mm/slob.o
   text    data     bss     dec     hex filename
   2051     112     233    2396     95c mm/slob.o

without
size mm/slob.o
   text    data     bss     dec     hex filename
   1331     120       8    1459     5b3 mm/slob.o

rt smp (slob new)
size mm/slob.o
   text    data     bss     dec     hex filename
   2297     120     233    2650     a5a mm/slob.o

without
size mm/slob.o
   text    data     bss     dec     hex filename
   1573     140       8    1721     6b9 mm/slob.o


So, should this be a third memory managment system?  A fast_slob?


Just for kicks here's slab.o:

rt:
size mm/slab.o
   text    data     bss     dec     hex filename
   8896     556     144    9596    257c mm/slab.o

rt smp:
size mm/slab.o
   text    data     bss     dec     hex filename
   9679     640      84   10403    28a3 mm/slab.o

So there's still a great improvement on that (maybe not the bss though).

-- Steve

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