Re: [POLL] SLAB : Are the 32 and 192 bytes caches really usefull onx86_64 machines ?

[Folkert van Heusden]

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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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