On 17/02/2023 10:41:37+0100, Alexander Kanavin wrote: > On the other hand, I'm yet to hear an actual case of a broken build > due to non-ECC. It's not impossible, but it seems exceedingly rare. > You're far more likely to spend 100x as much time on logical errors or > out-of-resources problems.
It actually happened in one of our build, were we had a bitflip in the final binary which was then not working as expected. We also had multiple cases of headers/source file corruption after the tarball is extracted but usually those are either caught by the compiler or don't matter at all. > > Alex > > On Fri, 17 Feb 2023 at 09:31, Yoann Congal <[email protected]> wrote: > > > > Hi! > > > > Le ven. 17 févr. 2023 à 06:08, <[email protected]> a écrit : > >> > >> Is there generally suggested advice regarding the importance of ECC on the > >> build computer? I'm very new to Yocto so I'm not sure if there is a chance > >> the final build image could experience some corruption due to flipped bits > >> in RAM or if I'm totally overthinking this. > > > > > > Last time I checked. The ECC vs non-ECC price difference was not worth the > > time you may spend in case of a RAM bitflip. > > Here, we put ECC RAM in our build systems and I guess it's quite the > > industry standard. > > > >> It is also possible that Yocto does some kind of CRC checking of its own > >> that makes this a non-issue. Any guidance would be appreciated. Thank you! > > > > > > Yocto does source integrity checks (the stuff it downloads from the > > internet) but it can't do much more after that. > > > > I've yet to debug a RAM bitflip but I guess it may trigger any kind of > > weird behavior which may be hard to debug and time consuming. > > > > My advice is : keep your time and sanity, use ECC RAM. > > > > Regards, > > -- > > Yoann Congal > > Smile ECS - Expert technique > > > > > > > > > -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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