On Mon, Feb 15, 2010 at 12:22:56PM -0600, Mike Westerhof wrote: > So my conclusion is that I/O is not the bottleneck for my OE builds, and > that's the only area where a VM is significantly different in terms of > performance (at least how I use VMs; perhaps other builds may observe > differences).
Interesting! out of curiosity, how many threads were you using for that test? I'm using: PARALLEL_MAKE="-j4" BB_NUMBER_THREADS = "2" for builds with my 1x AMD Phenom workstation at home and I would expect even more I/O with more concurrent threads. I didn't perform any sophisticated benchmark, but when I was using tmpfs I compared build times with genlop/qlop gentoo utility which shows history of all performed builds with time it used. So I've seen significant speedup when switched from single-drive to tmpfs, then not so significant slowdown when switched from tmpfs to raid0. But then I didn't recheck diff between single-drive builds and raid0 (because versions built were usually quite different) Kind regards, -- uin:136542059 jid:[email protected] Jansa Martin sip:[email protected] JaMa _______________________________________________ Openembedded-devel mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
