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Subject: Re: [gentoo-user] necessary use flgas
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<558A90E4.2090905@gmail.com> <20150624115007.GA1427@greenbeast>
From: Alan McKinnon <alan.mckinnon@gmail.com>
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On 24/06/2015 13:50, Alec Ten Harmsel wrote:
> P.P.S. Also, on 1% better performance: My professor for the compilers
> class I took used to (maybe still does) work at Google. Apparently
> Google sees a <1% increase in performance as *the best thing ever*,
> because it can save them a bunch of money in infrastructure and power.
> Apparently Google are the ultimate ricers.
Sounds like a case where Google already did the sensible optimizations
long long ago and are now hitting the diminishing returns from the long
tail. There are probably many of these and they all add up.
One thing I've learned about Google's setup - there's nothing else like
it out there and they are truly unique. Almost nothing Google does to
optimize their setup is widely applicable to anything else :-)
Take their power density. Last figures I have is they were running at 4x
the kW per square foot as anyone else with a brain. This terrifies
people who know about cooling. But, that's the setup and that's what
Google has to work with. Now suddenly, all those lots of little
improvements start to become a huge deal.
So yes, ultimate ricers. Also the ultimates in
"riding-co-close-to-the-edge-you-fall-off-the-cliff" :-)
--
Alan McKinnon
alan.mckinnon@gmail.com