I will take a look if you can give me ssh access. -Nathan
On Thu, Jan 08, 2015 at 02:29:05PM +0100, Adrian Reber wrote:
> I am trying to build OMPI git master on ppc64 (PPC970MP) and
> test/class/opal_fifo fails during make check most of the time.
>
> [adrian@bimini class]$ ./opal_fifo
> Single thread test. Time: 0 s 99714 us 99 nsec/poppush
> Atomics thread finished. Time: 0 s 347577 us 347 nsec/poppush
> Atomics thread finished. Time: 11 s 490743 us 11490 nsec/poppush
> Atomics thread finished. Time: 11 s 567542 us 11567 nsec/poppush
> Atomics thread finished. Time: 11 s 655924 us 11655 nsec/poppush
> Atomics thread finished. Time: 11 s 786925 us 11786 nsec/poppush
> Atomics thread finished. Time: 11 s 931230 us 11931 nsec/poppush
> Atomics thread finished. Time: 12 s 11617 us 12011 nsec/poppush
> Atomics thread finished. Time: 12 s 63224 us 12063 nsec/poppush
> Atomics thread finished. Time: 12 s 65844 us 12065 nsec/poppush
> Failure : fifo push/pop multi-threaded with atomics
> All threads finished. Thread count: 8 Time: 12 s 66103 us 1508 nsec/poppush
> Exhaustive atomics thread finished. Popped 11982 items. Time: 3 s 700703 us
> 308855 nsec/poppush
> Exhaustive atomics thread finished. Popped 12171 items. Time: 3 s 759974 us
> 308928 nsec/poppush
> Exhaustive atomics thread finished. Popped 11593 items. Time: 3 s 787227 us
> 326682 nsec/poppush
> Exhaustive atomics thread finished. Popped 11079 items. Time: 3 s 786468 us
> 341769 nsec/poppush
> Exhaustive atomics thread finished. Popped 16467 items. Time: 4 s 7891 us
> 243389 nsec/poppush
> Exhaustive atomics thread finished. Popped 11097 items. Time: 4 s 68897 us
> 366666 nsec/poppush
> Exhaustive atomics thread finished. Popped 25583 items. Time: 4 s 89074 us
> 159835 nsec/poppush
> Exhaustive atomics thread finished. Popped 22092 items. Time: 4 s 82373 us
> 184789 nsec/poppush
> Failure : fifo push/pop multi-threaded with atomics when there are
> insufficient items
> All threads finished. Thread count: 8 Time: 4 s 93369 us 511 nsec/poppush
> Failure : fifo pop all items
> SUPPORT: OMPI Test failed: opal_fifo_t (3 of 8 failed)
>
> I had a look at the memory barriers in opal/include/opal/sys/powerpc/atomic.h
> and from what little I remember about PPC64 those look correct:
>
> #define MB() __asm__ __volatile__ ("sync" : : : "memory")
> #define RMB() __asm__ __volatile__ ("lwsync" : : : "memory")
> #define WMB() __asm__ __volatile__ ("eieio" : : : "memory")
>
> The system is running Fedora 21 with gcc 4.9.2 and if this platform
> is still relevant I can provide SSH access to the machine
> for further debugging.
>
> Adrian
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> Link to this post:
> http://www.open-mpi.org/community/lists/devel/2015/01/16760.php
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