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Making RCU Respect Your Device's Battery Lifetime
--client
lca
--show
lca2013
--room MCC1 1599 --force
Next: 1 The future of non-volatile memory
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Author(s):
Paul McKenney
Location
MCC1
Date
jan Wed 30
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13:20
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0:45:00
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14:05
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http://lca2013.linux.org.au/schedule/30203/view_talk
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Back in the 1990s, energy efficiency was not even on the list of RCU-related concerns. Systems using RCU at that time dealt with either large quantities of heavy equipment or large financial flows, so that the energy consumption of the entire server (let alone RCU's contribution) was way down in the noise. This situation changed dramatically with the 2002 introduction of RCU into the Linux kernel. Since then, RCU's energy-efficiency code has been rewritten more than five times. The most recent rewrite was motivated by workloads where RCU was leaving tens of percent of potential energy savings on the table. This talk will give a brief overview of how energy efficiency came to RCU, the current situation, future prospects, and generally applicable lessons learned.
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