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

Folkert van Heusden
2005-12-21T13:20:51Z

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> > (x86_64 : PAGE_SIZE = 4096, L1_CACHE_BYTES = 64)
> > On my machines, I can say that the 32 and 192 sizes could be avoided in favor
> > in spending less cpu cycles in __find_general_cachep()
> > Could some of you post the result of the following command on your machines :
> > # grep "size-" /proc/slabinfo |grep -v DMA|cut -c1-40
> size-131072 0 0 131072
> size-65536 3 3 65536
> size-32768 0 0 32768
> size-16384 3 3 16384
> size-8192 28 28 8192
> size-4096 184 184 4096
> size-2048 272 272 2048
> size-1024 300 300 1024
> size-512 275 376 512
> size-256 717 720 256
> size-192 1120 1220 192
> size-64 7720 8568 64
> size-128 45019 65830 128
> size-32 1627 3333 32

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

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