LWN.net Logo

Video is available on youtube

Video is available on youtube

Posted Sep 23, 2008 13:24 UTC (Tue) by kjp (subscriber, #39639)
In reply to: Video is available on youtube by arjan
Parent article: LPC: Booting Linux in five seconds

*mind blows*

How much does Readahead help the SSD?


(Log in to post comments)

Benefit of sReadAhead on SSD

Posted Sep 23, 2008 14:49 UTC (Tue) by jreiser (subscriber, #11027) [Link]

A little less than 3 seconds (75MB of data at 25MB/s). The CPU and the SSD are both always busy from t=1.02 to t=4 seconds. The transfer latency is almost completely hidden, whereas before there was little overlap. Compare the bootcharts.

Video is available on youtube

Posted Sep 23, 2008 21:41 UTC (Tue) by arjan (subscriber, #36785) [Link]

it helps a little over 2 seconds; might sound little but remember that this is for a 4 second userspace part of the boot...

Copyright © 2013, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds