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Re: glibc 2.2.2 test-double failure

To: Jakub Jelinek <jakub at redhat dot com>
Subject: Re: glibc 2.2.2 test-double failure
From: "H . J . Lu" <hjl at valinux dot com>
Date: Fri, 16 Feb 2001 17:28:07 -0800
Cc: Ulrich Drepper <drepper at cygnus dot com>,Glibc hackers <libc-hacker at sources dot redhat dot com>
References: <20010216202728.P768@sunsite.ms.mff.cuni.cz> <m34rxu4e5n.fsf@otr.mynet.cygnus.com> <20010217011907.R768@sunsite.ms.mff.cuni.cz>

On Sat, Feb 17, 2001 at 01:19:08AM +0100, Jakub Jelinek wrote:
> On Fri, Feb 16, 2001 at 11:32:36AM -0800, Ulrich Drepper wrote:
> > Jakub Jelinek <jakub@redhat.com> writes:
> > 
> > > I've done make check of 2.2.2 on various platforms, alpha & alphaev6
> > > succeeded, ia64 failed with the usual ex5, ex9, ex10 thread tests needing to
> > > be killed (it is 4way ia64 FYI),
> > 
> > I don't see this on a UP.
> 
> It looks like both gnupro-1117 and gcc-2.96-75 miscompile spinlock.c at -O2
> or -O3 and when things and the first time threads contend on a spinlock they
> can go into endless loop.
> Don't know more details yet.

I used -O2. It works fine. Is that SMP related or a hardware bug?

-- 
H.J. Lu (hjl@valinux.com)

Follow-Ups:
- Re: glibc 2.2.2 test-double failure
  - From: Jakub Jelinek

References:
- glibc 2.2.2 test-double failure
  - From: Jakub Jelinek
- Re: glibc 2.2.2 test-double failure
  - From: Ulrich Drepper
- Re: glibc 2.2.2 test-double failure
  - From: Jakub Jelinek

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