Thanks George. I assume we need this in 1.4.2 and 1.5, right?
On Feb 17, 2010, at 6:15 PM, George Bosilca wrote:
> I usually prefer the expanded notation:
>
> unsigned char ret;
> __asm__ __volatile__ (
> "lock; cmpxchgl %3,%4 \n\t"
>
I usually prefer the expanded notation:
unsigned char ret;
__asm__ __volatile__ (
"lock; cmpxchgl %3,%4 \n\t"
" sete %0 \n\t"
: "=qm" (ret), "=a" (oldval), "=m" (*addr)
On Wed, 2010-02-10 at 08:42 -0700, Barrett, Brian W wrote:
> Adding the memory and cc will certainly do no harm, and someone tried to
> remove them as an optimization. I wouldn't change the input and output lines
> - the differences are mainly syntactic sugar.
Gcc actually didn't like the
Adding the memory and cc will certainly do no harm, and someone tried to remove
them as an optimization. I wouldn't change the input and output lines - the
differences are mainly syntactic sugar.
Brian
On Feb 10, 2010, at 7:04 AM, Ake Sandgren wrote:
> On Wed, 2010-02-10 at 08:21 -0500, Jeff
On Wed, 2010-02-10 at 08:21 -0500, Jeff Squyres wrote:
> On Feb 10, 2010, at 7:47 AM, Ake Sandgren wrote:
>
> > According to people who knows asm statements fairly well (compiler
> > developers), it should be
>
> > static inline int opal_atomic_cmpset_32( volatile int32_t *addr,
> >
On Feb 10, 2010, at 7:47 AM, Ake Sandgren wrote:
> According to people who knows asm statements fairly well (compiler
> developers), it should be
> static inline int opal_atomic_cmpset_32( volatile int32_t *addr,
> int32_t oldval, int32_t newval)
> {
>
On Tue, 2010-02-09 at 14:44 -0800, Mostyn Lewis wrote:
> The old opal_atomic_cmpset_32 worked:
>
> static inline int opal_atomic_cmpset_32( volatile int32_t *addr,
> unsigned char ret;
> __asm__ __volatile__ (
> SMPLOCK "cmpxchgl %1,%2 \n\t"
>
Jeff Squyres wrote:
Iain did the genius for the new assembly. Iain -- can you respond?
Iain is on vacation right now so he probably want be able to respond
until next week.
--td
On Feb 9, 2010, at 5:44 PM, Mostyn Lewis wrote:
The old opal_atomic_cmpset_32 worked:
static inline int
Well, I am by no means an expert on the GNU-style asm directives. I
believe someone else (George Bosilca?) tweaked what I had suggested.
That being said, I think the memory "clobber" is harmless.
Iain
On Feb 9, 2010, at 5:51 PM, Jeff Squyres wrote:
Iain did the genius for the new
Iain did the genius for the new assembly. Iain -- can you respond?
On Feb 9, 2010, at 5:44 PM, Mostyn Lewis wrote:
> The old opal_atomic_cmpset_32 worked:
>
> static inline int opal_atomic_cmpset_32( volatile int32_t *addr,
> unsigned char ret;
> __asm__ __volatile__ (
>
The old opal_atomic_cmpset_32 worked:
static inline int opal_atomic_cmpset_32( volatile int32_t *addr,
unsigned char ret;
__asm__ __volatile__ (
SMPLOCK "cmpxchgl %1,%2 \n\t"
"sete %0 \n\t"
: "=qm"
On Tue, 2010-02-09 at 13:42 -0500, Jeff Squyres wrote:
> Perhaps someone with a pathscale compiler support contract can investigate
> this with them.
>
> Have them contact us if they want/need help understanding our atomics; we're
> happy to explain, etc. (the atomics are fairly localized to a
Perhaps someone with a pathscale compiler support contract can investigate this
with them.
Have them contact us if they want/need help understanding our atomics; we're
happy to explain, etc. (the atomics are fairly localized to a small part of
OMPI).
On Feb 9, 2010, at 11:42 AM, Mostyn
All,
FWIW, Pathscale is dying in the new atomics in 1.4.1 (and svn trunk) - actually
looping -
from gdb:
opal_progress_event_users_decrement () at
../.././opal/include/opal/sys/atomic_impl.h:61
61 } while (0 == opal_atomic_cmpset_32(addr, oldval, oldval - delta));
Current language:
On Tue, 2010-02-09 at 08:49 -0500, Jeff Squyres wrote:
> FWIW, I have had terrible luck with the patschale compiler over the years.
> Repeated attempts to get support from them -- even when I was a paying
> customer -- resulted in no help (e.g., a pathCC bug with the OMPI C++
> bindings that I
FWIW, I have had terrible luck with the patschale compiler over the years.
Repeated attempts to get support from them -- even when I was a paying customer
-- resulted in no help (e.g., a pathCC bug with the OMPI C++ bindings that I
filed years ago was never resolved).
Is this compiler even
Hello,
It does work with version 1.4. This is the hello world that hangs with
1.4.1:
#include
#include
int main(int argc, char **argv)
{
int node, size;
MPI_Init(,);
MPI_Comm_rank(MPI_COMM_WORLD, );
MPI_Comm_size(MPI_COMM_WORLD, );
printf("Hello World from Node %d of %d.\n", node,
1 - Do you have problems with openmpi 1.4 too? (I don't, haven't built
1.4.1 yet)
2 - There is a bug in the pathscale compiler with -fPIC and -g that
generates incorrect dwarf2 data so debuggers get really confused and
will have BIG problems debugging the code. I'm chasing them to get a
fix...
3 -
I'm afraid I don't have any clues offhand. We *have* had problems with the
Pathscale compiler in the past that were never resolved by their support crew.
However, they were of the "variables weren't initialized and the process
generally aborts" kind of failure, not a "persistent hang" kind of
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