Posted Aug 30, 2010 21:59 UTC (Mon) by giraffedata
In reply to: sreadahead
Parent article: LinuxCon: A tale of two bootcharts
The main advantage is to never have to do iowait but always have the data you need at hand. Eg doing 10 seconds of disk reads and 15 seconds of CPU time in 15 seconds rather than in 25 seconds.
OK, I forgot about that. So I take it sreadahead runs in parallel with other boot processes?
But just based on what I've seen and heard my disk drive do during painfully slow boots, I'll bet the CPU time is dwarfed by the seek time, so overlapping CPU and disk time wouldn't buy a whole lot.
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