Re: Buffered I/O slowness

[Andrew Morton]

Jesse Barnes <jbarnes@xxxxxxxxxxxx> wrote:
>
> > I'm not sure that we know what's going on yet.  I certainly don't.  The
> > above numbers look good, so what's the problem???
> 
> The numbers are ~1/3 of what the machine is capable of with direct I/O.

Are there CPU cycles to spare?  If you have just one CPU copying 1GB/sec
out of pagecache, maybe it is pegged?
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