* Eric Dumazet <[EMAIL PROTECTED]> wrote:
> Ingo Molnar a écrit :
>> * Eric Dumazet <[EMAIL PROTECTED]> 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 :)
I think being able to open+close sockets in a scalable way is an
undisputed prime-time workload on Linux. The numbers you showed look
horrible.
Once you can show how much faster it could go via hacks, it should
only be a matter of time to achieve that safely and cleanly.
> wall cost of 1.56 (each cpu runs one loop of one million iterations)
(indeed.)
Ingo
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