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SubjectRe: [PATCH] fs: pipe/sockets/anon dentries should not have a parent
Ingo Molnar a écrit :
> * Eric Dumazet <dada1@cosmosbay.com> wrote:
>
>> Before patch, time to run 8 millions of close(socket()) calls on 8
>> CPUS was :
>>
>> real 0m27.496s
>> user 0m0.657s
>> sys 3m39.092s
>>
>> After patch :
>>
>> real 0m23.997s
>> user 0m0.682s
>> sys 3m11.193s
>
> cool :-)
>
> What would it take to get it down to:
>
>>> Cost if run one one cpu :
>>>
>>> real 0m1.561s
>>> user 0m0.092s
>>> sys 0m1.469s
>
> i guess asking for a wall-clock cost of 1.561/8 would be too much? :)
>

It might be possible, depending on the level of hackery I am allowed to inject
in fs/dcache.c and fs/inode.c :)

wall cost of 1.56 (each cpu runs one loop of one million iterations)


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