[yocto] Recommended Hardware for building
Denys Dmytriyenko
denis at denix.org
Tue Oct 7 16:53:25 PDT 2014
On Thu, Oct 02, 2014 at 11:04:43AM +0100, Burton, Ross wrote:
> On 2 October 2014 10:36, Oliver Novakovic <Oliver.Novakovic at alpine.de> wrote:
> > Can anyone recommend a reasonable performant hardware setup to use ?
> >
> > What should be considered ? Are there any pitfalls ? What about bottlenecks
> > in the build system ?
> >
> > Specifically:
> >
> > How many cores are recommended ? And how much cache is necessary ?
> > How much of the main memory does Yocto really use ? Is 32 GB sufficient or
> > should I go for 64 ?
> >
> > Does it make sense to use two SSDs as Raid0 to get builds faster ?
>
> As much of everything as you can afford. :) The build isn't heavy in
> any particular metric, so don't sacrifice RAM for SSDs for example.
>
> RAID 0 over SSD would be nice and fast, but I prefer having a good
> amount of RAM and a tuned ext4 (no journal, long commit delay) so data
> doesn't actually hit the disk as frequently. Keeping the actual build
> directories on a separate disk is good for performance and not causing
> data loss when you lose a disk.
>
> There are people that have 64GB in machines and then set TMPDIR to a
> tmpfs. Surprisingly this isn't that much faster (5% or so), but it's
> a lot easier on the hardware and power consumption.
That's how I roll - after I lost few SSD drives by constantly building and
rebuilding stuff, I ended up shoving 64GB of RAM into my gear and building
into RAM-based tmpfs. Of course, there are size limits to what can be built in
one go, but there are workarounds and ways to serialize builds...
--
Denys
More information about the yocto
mailing list