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Date:      Tue, 07 Mar 2017 10:55:44 +0000
From:      Andrew Gierth <andrew@tao11.riddles.org.uk>
To:        Mark Millard <markmi@dsl-only.net>
Cc:        Warner Losh <imp@bsdimp.com>, "freebsd-arm\@freebsd.org" <freebsd-arm@freebsd.org>
Subject:   Re: Is CPUTYPE=cortex-A7 supposed to work?
Message-ID:  <87k281e5y7.fsf@news-spur.riddles.org.uk>
In-Reply-To: <3056BE0A-6441-4878-905D-741C61BDC47C@dsl-only.net> (Mark Millard's message of "Sun, 5 Mar 2017 20:26:49 -0800")
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> <3056BE0A-6441-4878-905D-741C61BDC47C@dsl-only.net>

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>>>>> "Mark" == Mark Millard <markmi@dsl-only.net> writes:

 Mark> I'm currently sticking with some known failures in the base
 Mark> system: openssl speed failures. (A signal based program crash
 Mark> without X11 involved could be interesting.)

I've been continuing to look at git, as being the simplest test case I
have on hand.

I have determined that the sha1 failures occur only if the NEON-enabled
SHA1 block function is interrupted by a signal. This explains why it
fails in git (which is using SIGALRM to set a "display progress" flag)
but not in standalone SHA1 tests; I believe openssl speed also uses
SIGALRM to time tests.

-- 
Andrew.



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