Date: Sun, 5 Mar 2017 20:26:49 -0800 From: Mark Millard <markmi@dsl-only.net> To: Andrew Gierth <andrew@tao11.riddles.org.uk>, Warner Losh <imp@bsdimp.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: Is CPUTYPE=cortex-A7 supposed to work? Message-ID: <3056BE0A-6441-4878-905D-741C61BDC47C@dsl-only.net> In-Reply-To: <8760jnfvwp.fsf@news-spur.riddles.org.uk> References: <871suc3nv8.fsf@news-spur.riddles.org.uk> <CANCZdfq4EwH%2B_9FVNai8s6Y-gdTjHJ8dNkJwSrnF%2BSAkdwvYdg@mail.gmail.com> <87tw7820fc.fsf@news-spur.riddles.org.uk> <644D1F49-BF5D-409D-BFC4-4F7E6E73085B@dsl-only.net> <87lgsk1udz.fsf@news-spur.riddles.org.uk> <9677298B-5A5E-44BF-928E-28DDDADB310A@dsl-only.net> <87h93814rb.fsf@news-spur.riddles.org.uk> <70AE704A-C9FF-4742-88E9-147CD5B77BE8@dsl-only.net> <87tw77iwx6.fsf@news-spur.riddles.org.uk> <8760jnfvwp.fsf@news-spur.riddles.org.uk>
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On 2017-Mar-5, at 10:14 AM, Andrew Gierth <andrew@tao11.riddles.org.uk> = wrote: >>>>>> "Andrew" =3D=3D Andrew Gierth <andrew@tao11.riddles.org.uk> = writes: >=20 > Andrew> emacs-25.1,3 built with x11 support and running in graphical > Andrew> mode is unstable; crashes randomly either with a mutex > Andrew> assertion (enqueue_mutex complaining that the mutex is already > Andrew> owned) or with SEGV. Running in text mode, it doesn't crash, > Andrew> but hitting pagedown in some buffers (where there are many > Andrew> similar lines) _reliably_ produces incorrect display output in > Andrew> which some characters are displaced by 4: >=20 > Extra bonus strangeness: recompiling just emacs without cortex-a7 does > not fix either of these, so it's not an issue with miscompiling any of > the emacs code. This is consistent with my experimentation with git. >=20 > --=20 > Andrew. I'm currently sticking with some known failures in the base system: openssl speed failures. (A signal based program crash without X11 involved could be interesting.) Disabling the use of NEON via a hack removes the "openssl speed" problem. With: /usr/src/crypto/openssl/crypto/armcap.c : . . . void OPENSSL_cpuid_setup(void) { . . . } else if (sigsetjmp(ill_jmp, 1) =3D=3D 0) { _armv7_neon_probe(); #ifndef DISABLE_HACK_THAT_AVOIDS_NEON OPENSSL_armcap_P |=3D ARMV7_NEON; #endif . . . "openssl speed" completes normally. This can also be done from gdb by setting OPENSSL_armcap_P after the: OPENSSL_armcap_P |=3D ARMV7_NEON; executes in order to turn off the bit. =3D=3D=3D Mark Millard markmi at dsl-only.net
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