Date: Sun, 20 Aug 2017 08:55:08 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 221029] AMD Ryzen: strange compilation failures using poudriere or plain buildkernel/buildworld Message-ID: <bug-221029-8-wcWlL8CVjv@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-221029-8@https.bugs.freebsd.org/bugzilla/> References: <bug-221029-8@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D221029 --- Comment #81 from Mark Millard <markmi@dsl-only.net> --- (In reply to Don Lewis from comment #80) FYI for my tests: So far with kern.sched.steal_idle=3D0 I've never had lang/ghc fail to build. So far with kern.sched.steal_idle=3D1 I've always had lang/ghc fail to build --before it even started using ghc-stage1. (I monitored via top.) These failures do seem random for at what point of the lang/ghc build hat the failure happens. (Builds that work take vastly longer to complete as well.) I've done a half dozen build attempts or so each way over those two alternatives (so far). lang/ghc builds failed for kern.sched.steal_idle=3D1 every time that I've tried it, even when poudriere was configured to avoid parallel builds (including and avoiding ALLOW_MAKE_JOBS) and lang/ghc was the only thing being built, prerequisites already in place. System-wide memory bandwidth usage being high does not seem to be important to having the lang/ghc builds fail. Most of the failure examples are for CPU temperatures under 40 DegC. Only for hot days in contexts without air conditioning have I seen as high as 44 DegC for the Ryzen PC. (Liquid cooled, two 360 mm radiators, ten 120 mm fans, low end graphics card, and so on: all biased to keeping temperatures down.) Die temperature does not seem to be important to having the lang/ghc builds fail. (It is too preliminary to depend on yet but so far the kern.sched.steal_idle=3D0 "poudriere bulk -a" has had no SIGSEGV or SIGBUS like failures for any ports, unlike when I'd tried with kern.sched.steal_idle=3D1 .) I do not expect the kern.sched.steal_idle=3D0 results to be luck at this point (up to any kern.sched.balance=3D1 contribution if involved). --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-221029-8-wcWlL8CVjv>