I agree that we should drop support for non-SSE2. It mattered 7 years ago (see https://bugzilla.mozilla.org/show_bug.cgi?id=500277) but it really doesn't matter now.
We do need to avoid updating these users to a build that will crash, and do the same "unsupported" messaging we're doing for old versions of MacOS. Gregory, will you own that? You will probably need to add CPU feature detection to the update URL/params for 47, or use some kind of system addon to shunt these users off the main update path. --BDS On Fri, May 6, 2016 at 10:10 AM, Mike Hoye <mh...@mozilla.com> wrote: > On 2016-05-06 12:26 AM, Gregory Szorc wrote: > >> FWIW, the crashes we've seen so far are from incorrectly emitted movss >> instructions. This instruction is part of the original SSE instruction >> set, >> which was initially unveiled by Intel on the Pentium 3 in 1999 and later >> by >> AMD on the Duron and Athlon XP in 2000-2001. I'm not sure why we still >> need >> Firefox to run on processors manufactured in the 90s. >> > Per an IRC conversation with chutten, Firefox users on CPUs that do not > support SSE are 0.015% of our user base. (compared to 0.4% for no-SSE2). A > third of those are on otherwise-unsupported configurations (pre-SP3 XP, > etc), this work provides continuity of support to 0.01% of our users. > > - mhoye > > > 09:59 <chutten> So, to put it clearly and precisely, of the Firefox > Population in release and beta who are reporting at least base telemetry > collection on machines running supported configurations, only 0.01% cannot > definitively say they have SSE. > 10:00 <chutten> (according to a 1% random sample as stored in the > longitudinal dataset) > > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
