Messages in this thread | | | Date | Wed, 25 Jan 2012 17:04:16 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH v2] proc: speedup /proc/stat handling |
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On Wed, 25 Jan 2012 06:29:32 +0100 Eric Dumazet <eric.dumazet@gmail.com> wrote:
> Le mardi 24 janvier 2012 __ 17:27 -0800, Andrew Morton a __crit : > > > 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 ?
About 40mm, but it depends on the font size.
> wc -c /proc/stat > > If under 4096, there is no problem with existing code.
akpm2:/home/akpm> wc -c /proc/stat 2800 /proc/stat
> I had the problem on a 16-way machine.
OK..
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