Re: [performance bug] kernel building regression on 64 LCPUsmachine

[Ted Ts'o]

On Wed, Jan 19, 2011 at 09:55:48AM +0800, Alex,Shi wrote:
> Shaohua and I tested kernel building performance on latest kernel. and
> found it is drop about 15% on our 64 LCPUs NHM-EX machine on ext4 file
> system. 

What kerenl version were you comparing against?  And what were you
using to benchmark this performance drop?  I'm curious what your
workload was; I'm guesisng it was some kind of mixed read/write
workload?  Were there any fsync()'s involved?

Thanks, regards,

						- Ted
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