Re: [POLL] SLAB : Are the 32 and 192 bytes caches really usefull on x86_64 machines ?

Eric Dumazet
2005-12-21T13:38:27Z

Folkert van Heusden a écrit :

>
>
> size-131072 0 0 131072
> size-65536 0 0 65536
> size-32768 20 20 32768
> size-16384 8 9 16384
> size-8192 37 38 8192
> size-4096 269 269 4096
> size-2048 793 910 2048
> size-1024 564 608 1024
> size-512 702 856 512
> size-256 1485 4005 256
> size-128 1209 1350 128
> size-64 2858 3363 64
> size-32 1538 2714 64
> Intel(R) Xeon(TM) MP CPU 3.00GHz
> address sizes : 40 bits physical, 48 bits virtual
>
>
> Folkert van Heusden

Hi Folkert

Your results are interesting : size-32 seems to use objects of size 64 !

> size-32 1538 2714 64 <<HERE>>

So I guess that size-32 cache could be avoided at least for EMT (I take you
run a 64 bits kernel ?)

Eric