Am 21.10.18 um 19:07 schrieb Joel Sherrill: > Hi > > I am in the middle of reconfiguring my old (~2013 i7) laptop as an email > and remote workstation for home. Between helping students and doing two > Kick Starts in the past 6 weeks, VM configuration, disk space > expectations, and time required to build the tools seem to be a topic > that needs to be addressed. Under-configured VMs don't finish building > or take a LONG time. > > I am proposing that I gather performance and configuraton notes for > building SPARC tools after downloading source on a few configurations: > > + Laptop 2013 i7: Centos on VM > + Laptop 2013 i7: MSYS2 > + Laptop 2013 i7: Cygwin > + Laptop 2017 i7: Same three > + 8 core Xeon Centos native > + 12 core i7 Fedora native > > One the 2017 7th generation i7, differences in VM configuration can > result in the build time for sparc tools almost tripling. > > Does this sound useful or confusing? I know it is potentially somewhat > volatile information. But my old 3rd generation i7 CPU benchmark results > are comparable to an i5 that is much newer. Plus my old i7 has an SSD > which many newer i3/i5 laptops do not. > > Feedback appreciated. > > --joel >
Hello Joel, in my experience, the biggest difference in the build time is the number of cores (in a VM or on a real machine). The processor generation didn't seem to have that much influence. But I never measured exact numbers. It might would be a good idea to add some rough numbers somewhere (maybe in the RSB-manual) so that a new user knows that he has to expect for example roughly 4 to 6 hours on a single core or about 1/2 to 3/4 of an hour on a 8 core Linux system. It might could be interesting to have some rough numbers for other commonly used systems too (like MSYS2, Cygwin, FreeBSD or MacOS). I don't think that it is useful to compare processor generations. That would be an information that would have to be updated on a regular basis to have any use. I would only add some (few) examples. If you find any big influences beneath number of cores (you mentioned VM settings), it might would be worth adding a general section with tips for speeding up the build process. Best regards Christian _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
