Date: Tue, 3 Dec 2019 10:04:37 -0500 From: Ed Maste <emaste@freebsd.org> To: Ryan Stone <rysto32@gmail.com> Cc: freebsd-arch <freebsd-arch@freebsd.org>, freebsd-arm <freebsd-arm@freebsd.org>, Hiroki Sato <hrs@allbsd.org> Subject: Re: arm64 as Tier 1 for FreeBSD 13 Message-ID: <CAPyFy2CtYEqZ-w6SJTGiDpCpA-=7NzKmkGP7k3NAosG2xrCY8g@mail.gmail.com> In-Reply-To: <CAFMmRNxadJ1bq=h=m2B=ArRgHbnCyrMsscyPqmwGtbqudmaRfg@mail.gmail.com> References: <CAPyFy2Aa6Uj0nyQ1Y_KPLd7%2BROJ4xW5i-SpctV1sRVK_BivPHw@mail.gmail.com> <CAPyFy2D91v7SwjZOgMG0a9V%2BH6GVCF8NHKp341N8mwnCvA71cA@mail.gmail.com> <CAPyFy2BP3hFHuFJyo2M-5pc0%2BCmRiyym1TZ81P5xicR4zED1JQ@mail.gmail.com> <CAPyFy2BXWPVOJo%2BGOf83sZFrPHE80-QvdHeWrhi%2BTdj0KDnThg@mail.gmail.com> <CAFMmRNxadJ1bq=h=m2B=ArRgHbnCyrMsscyPqmwGtbqudmaRfg@mail.gmail.com>
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On Tue, 3 Dec 2019 at 12:19, Ryan Stone <rysto32@gmail.com> wrote: > > For eBPF, Sato-san is working on a JIT compiler. Depending on the how > it winds up being implemented, it may only support JIT'ing for amd64 > (one possibility being floated is an LLVM-based implementation, in > which case arm64 support is a lot easier). If arm64 has to use an > interpreter to run eBPF code rather than JIT'ing it, is that > acceptable for a tier-1 platform? I don't think that it should be a requirement for tier 1. We could argue that the feature exists on all platforms, but performance optimizations exist on only a subset. That said, if we end up with a bespoke (non-LLVM) JIT I hope we'd also add arm64.
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