[ltt-dev] [RELEASE] Userspace RCU library 0.4.4

[ltt-dev] [RELEASE] Userspace RCU library 0.4.4

[Mathieu Desnoyers]

Hi,

The Userspace RCU library 0.4.4 (available at http://lttng.org/urcu) includes an
atomic operations fix for the 32-bit (and 64-bit) powerpc architectures, where
the 4-byte cmpxchg was using a cmpd rather than the appropriate cmpw
instruction.

It did cause illegal instruction faults on powerpc 32.

Thanks,

Mathieu

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com

[ltt-dev] [RELEASE] Userspace RCU library 0.4.4

[Jon Bernard]

* Mathieu Desnoyers <mathieu.desnoyers at efficios.com> wrote:
> Hi,
> 
> The Userspace RCU library 0.4.4 (available at http://lttng.org/urcu) includes an
> atomic operations fix for the 32-bit (and 64-bit) powerpc architectures, where
> the 4-byte cmpxchg was using a cmpd rather than the appropriate cmpw
> instruction.
> 
> It did cause illegal instruction faults on powerpc 32.

I think it would be useful to have the test scripts included in future
release tarballs so users can easily run the test suite via the check
target. I believe including runall.sh, runtests.sh, and
runtests-batch.sh from the tests subdirectory is all that would be
necessary.

Cheers

-- 
Jon

[ltt-dev] [RELEASE] Userspace RCU library 0.4.4

[Mathieu Desnoyers]

* Jon Bernard (jbernard at debian.org) wrote:
> * Mathieu Desnoyers <mathieu.desnoyers at efficios.com> wrote:
> > Hi,
> > 
> > The Userspace RCU library 0.4.4 (available at http://lttng.org/urcu) includes an
> > atomic operations fix for the 32-bit (and 64-bit) powerpc architectures, where
> > the 4-byte cmpxchg was using a cmpd rather than the appropriate cmpw
> > instruction.
> > 
> > It did cause illegal instruction faults on powerpc 32.
> 
> I think it would be useful to have the test scripts included in future
> release tarballs so users can easily run the test suite via the check
> target. I believe including runall.sh, runtests.sh, and
> runtests-batch.sh from the tests subdirectory is all that would be
> necessary.

Actually, it's in version 0.4.4 already. Only runall.sh is executed,
since it executes that other tests. I'm adding test_uatomic too for the
next release. Note that this is a really braindead uatomic ops test, as
it only checks for single-thread consistency of the operations. We
should really extend this test to multithread someday.

Thanks,

Mathieu

> 
> Cheers
> 
> -- 
> Jon
> 
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> ltt-dev mailing list
> ltt-dev at lists.casi.polymtl.ca
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> 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com

[ltt-dev] [RELEASE] Userspace RCU library 0.4.4

[Jon Bernard]

* Mathieu Desnoyers <compudj at krystal.dyndns.org> wrote:
> * Jon Bernard (jbernard at debian.org) wrote:
> > * Mathieu Desnoyers <mathieu.desnoyers at efficios.com> wrote:
> > > Hi,
> > > 
> > > The Userspace RCU library 0.4.4 (available at http://lttng.org/urcu) includes an
> > > atomic operations fix for the 32-bit (and 64-bit) powerpc architectures, where
> > > the 4-byte cmpxchg was using a cmpd rather than the appropriate cmpw
> > > instruction.
> > > 
> > > It did cause illegal instruction faults on powerpc 32.
> > 
> > I think it would be useful to have the test scripts included in future
> > release tarballs so users can easily run the test suite via the check
> > target. I believe including runall.sh, runtests.sh, and
> > runtests-batch.sh from the tests subdirectory is all that would be
> > necessary.
> 
> Actually, it's in version 0.4.4 already. Only runall.sh is executed,

I do not see them in the userspace-rcu-0.4.4 tarball. They are certainly
present in the repository, I believe the dist/release target just needs
updating to include those necessary shell scripts at release time.

-- 
Jon