[Devel] nptl perf bench and profiling with pidns patchsets

[Cedric Le Goater]

Pavel Emelianov wrote:
> Cedric Le Goater wrote:
>> Pavel and all,
> 
> [snip] 
> 
>> findings are : 
>>
>> * definitely better results for suka's patchset. suka's patchset is 
>>   also getting better results with unixbench on a 2.6.22-rc1-mm1 but 
>>   the values are really dispersed. can you confirm ?
>> * suka's patchset would benefit from some optimization in init_upid() 
>>   and dup_struct_pid()  
> 
> We have found the reason why Suka's patches showed better performance.
> Some time ago I sent a letter saying that proc_flush_task() actually
> never worked with his patches - that's the main problem. After removing
> this call from my patches the results turned to those similar to my.
> 
> I'd also like to note that broken-out set of patches is not git bisect
> safe at all. The very first patch of his own OOPSes the node. Some
> subsequent patches contain misprints that break the compilation, etc.
> 
> So I ask you again - let us prepare our patches again and compare the 
> performance one more time.

OK. that's fine with me. 

I'm not exactly in a neutral zone but I have the blades ready for the 
next drop of patches. I'll torture them if you don't mind.

C.
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