Re: [PATCH v2] proc: speedup /proc/stat handling
From: Eric Dumazet
Date: Wed Jan 25 2012 - 00:29:35 EST
Le mardi 24 janvier 2012 Ã 17:27 -0800, Andrew Morton a Ãcrit :
> I had a fiddle on an 8-way x86_64 machine. I'm unable to demonstrate
> any improvement for either of
>
> time (for i in $(seq 1000); do; cat /proc/self/stat > /dev/null; done)
> time (for i in $(seq 1000); do; cat /proc/1/stat > /dev/null; done)
>
> oh well.
What size is /proc/stat ?
wc -c /proc/stat
If under 4096, there is no problem with existing code.
I had the problem on a 16-way machine.
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