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Subject: Re: [OMPI devel] Migrate OpenMPI to the VxWorks
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2010-06-04 08:20:26


Maybe gettimeofday() be replaced with opal_gettimeofday(), which could do the Right Thing on different platforms...?

Also, for fork/exec, I think that should be mostly limited to orte/odls/default, right? If so, perhaps the right thing to do is to clone that plugin and adapt it for you platform.

 
On Jun 4, 2010, at 1:43 AM, $)AUE>' wrote:

> Hi Castain ,
>
> Your last mail to me is really helpful . I met most of the issues
> listed and fixed them as the off-list solution or mine .
> Also as the openmpi code changed there are some other issues (almost
> the missing function ) that are not reported .For example , the
> gettimeofday posix function is not implemented by vxworks library ,I
> just wrote a small library for those function. Until now I have
> successfully compiled the libopen-rte.a and libopen-pal.a , but now
> I stuck
> at the problem of fork and exec ,which is not available in the
> vxworks. It is not possible to implement the fork and exec by myself.I
> have to read through the code using the fork ,then substitute them
> with rtpspawn() . It is a challenging work.I really want to know how
> Brian Barrett deals with the fork() and exec() .
>
> Thanks
>
> Jing
>
> 2010/3/18 Ralph Castain <rhc_at_[hidden]>:
> > Hi Jing
> > Someone else took a look at this off-list a few years ago. It was mostly a
> > problem with the build system (some flags are different) and header file
> > names. I don't believe the port was ever completed though.
> > I have appended the results of that conversation - the last message
> > contained a list of the issues. You would need to update that to the trunk
> > of course as the code has changed considerably since that discussion took
> > place. Brian Barrett subsequently created a first-cut at fixing some of
> > these, but that appears to have been lost in the years since it was done -
> > and wouldn't really be current anyway.
> > I would be happy to assist as I can.
> > Ralph
> >
> > 1. configure issues with "checking prefix for global symbol labels"
> >
> > 1a. VxWorks assembler (CCAS=asppc) generates a.out by default (vs.
> >
> > conftest.o that we need subsequently)
> >
> > there is this fragment to determine the way to assemble conftest.s:
> >
> > if test "$CC" = "$CCAS" ; then
> >
> > ompi_assemble="$CCAS $CCASFLAGS -c conftest.s >conftest.out 2>&1"
> >
> > else
> >
> > ompi_assemble="$CCAS $CCASFLAGS conftest.s >conftest.out 2>&1"
> >
> > fi
> >
> > The subsequent link fails because conftest.o does not exist:
> >
> > ompi_link="$CC $CFLAGS conftest_c.$OBJEXT conftest.$OBJEXT -o conftest >
> > conftest.link 2>&1"
> >
> > To work around the problem, I did not set CCAS. This gives me the first
> >
> > invocation that includes the -c argument to CC=ccppc, generating
> >
> > conftest.o output.
> >
> >
> > 1b. linker fails because LDFLAGS are not passed
> >
> > The same linker command line caused problems because $CFLAGS were passed
> >
> > to the linker
> >
> > ompi_link="$CC $CFLAGS conftest_c.$OBJEXT conftest.$OBJEXT -o conftest >
> > conftest.link 2>&1"
> >
> > In my environment, I set CC/CFLAGS/LDFLAGS as follows:
> >
> > CC=ccppc
> >
> > CFLAGS=-ggdb3 -std=c99 -pedantic -mrtp -msoft-float -mstrict-align
> >
> > -mregnames -fno-builtin -fexceptions'
> >
> > LDFLAGS=-mrtp -msoft-float -Wl,--start-group -Wl,--end-group
> >
> > -L/amd/raptor/root/opt/WindRiver/vxworks-6.3/target/usr/lib/ppc/PPC32/sfcommon
> >
> > The linker flags are not passed because the ompi_link
> >
> > [xp-kcain1:build_vxworks] ccppc -ggdb3 -std=c99 -pedantic -mrtp
> >
> > -msoft-float -mstrict-align -mregnames -fno-builtin -fexceptions -o
> >
> > hello hello.c
> >
> > /amd/raptor/root/opt/WindRiver/gnu/3.4.4-vxworks-6.3/x86-linux2/bin/../lib/gcc/powerpc-wrs-vxworks/3.4.4/../../../../powerpc-wrs-vxworks/bin/ld:
> >
> >
> > cannot find -lc_internal
> >
> > collect2: ld returned 1 exit status
> >
> >
> > 2. OPAL atomics asm.c:
> >
> > int versus int32_t (refer to email with Brian Barrett
> >
> > 3. OPAL event/event.c: sys/time.h and timercmp() macros not defined by
> >
> > VxWorks
> >
> > refer to workaround in event.c using #ifdef MCS_VXWORKS
> >
> > 4. OPAL event/event.c: pipe() syscall not found
> >
> > workaround:
> >
> > #ifdef HAVE_UNISTD_H
> >
> > #include <unistd.h>
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <ioLib.h> /* for pipe() */
> >
> > #endif
> >
> > #endif
> >
> > 5. OPAL event/signal.c
> >
> > static sig_atomic_t opal_evsigcaught[NSIG];
> >
> > NSIG is not defined
> >
> > but _NSIGS is
> >
> > In Linux, NSIG is defined with -D__USE_MISC
> >
> > So I added this code fragment to signal.c:
> >
> > /* VxWorks signal.h defines _NSIGS, not NSIG */
> >
> > #ifdef MCS_VXWORKS
> >
> > #define NSIG (_NSIGS+1)
> >
> > #endif
> >
> >
> > 6. OPAL event/signal.c: no socketpair()
> >
> > workaround: use pipe():
> >
> > #ifdef HAVE_UNISTD_H
> >
> > #include <unistd.h>
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <ioLib.h> /* for pipe() */
> >
> > #endif
> >
> > #endif
> >
> > and later in void opal_evsignal_init(sigset_t *evsigmask)
> >
> > #ifdef MCS_VXWORKS
> >
> > if (pipe(ev_signal_pair) == -1)
> >
> > event_err(1, "%s: pipe", __func__);
> >
> > #else
> >
> > if (socketpair(AF_UNIX, SOCK_STREAM, 0, ev_signal_pair) == -1)
> >
> > event_err(1, "%s: socketpair", __func__);
> >
> > #endif
> >
> > 7. OPAL util/basename.c: #if HAVE_DIRNAME problem
> >
> > ../../../opal/util/basename.c:23:5: warning: "HAVE_DIRNAME" is not defined
> >
> > ../../../opal/util/basename.c: In function `opal_dirname':
> >
> > problem: HAVE_DIRNAME is not defined in opal_config.h so the #if
> >
> > HAVE_DIRNAME will fail at preprocessor/compile time
> >
> > workaround:
> >
> > change #if HAVE_DIRNAME to #if defined(HAVE_DIRNAME)
> >
> >
> > 8. OPAL util/basename.c: strncopy_s and _strdup
> >
> > ../../../opal/util/basename.c: In function `opal_dirname':
> >
> > ../../../opal/util/basename.c:153: error: implicit declaration of
> >
> > function `strncpy_s'
> >
> > ../../../opal/util/basename.c:160: error: implicit declaration of
> >
> > function `_strdup'
> >
> > #ifdef MCS_VXWORKS
> >
> > strncpy( ret, filename, p - filename);
> >
> > #else
> >
> > strncpy_s( ret, (p - filename + 1), filename, p - filename );
> >
> > #endif
> >
> > #ifdef MCS_VXWORKS
> >
> > return strdup(".");
> >
> > #else
> >
> > return _strdup(".");
> >
> > #endif
> >
> >
> >
> > 9. opal/util/if.c: socket() prototype not found in vxworks headers
> >
> > #ifdef HAVE_SYS_SOCKET_H
> >
> > #include <sys/socket.h>
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <sockLib.h>
> >
> > #endif
> >
> > #endif
> >
> > 10. opal/util/if.c: ioctl()
> >
> > #ifdef HAVE_SYS_IOCTL_H
> >
> > #include <sys/ioctl.h>
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <ioLib.h>
> >
> > #endif
> >
> > #endif
> >
> > 11. opal/util/os_path.c: MAXPATHLEN change to PATH_MAX
> >
> > #ifdef MCS_VXWORKS
> >
> > if (total_length > PATH_MAX) { /* path length is too long - reject
> >
> > it */
> >
> > return(NULL);
> >
> > #else
> >
> > if (total_length > MAXPATHLEN) { /* path length is too long -
> >
> > reject it */
> >
> > return(NULL);
> >
> > #endif
> >
> >
> > 12. opal/util/output.c: gethostname()
> >
> > include <hostLib.h>
> >
> > 13. opal/util/output.c: MAXPATHLEN
> >
> > same fix as os_path.c above
> >
> > 14. opal/util/output.c: closelog/openlog/syslog
> >
> > manually turned off HAVE_SYSLOG_H in opal_config.h
> >
> > then got a patch from Jeff Squyres that avoids syslog
> >
> > 15. opal/util/opal_pty.c
> >
> > complains about mismatched prototype of opal_openpty() between this
> >
> > source file and opal_pty.h
> >
> > workaround: manually edit build_vxworks_ppc/opal/include/opal_config.h,
> >
> > use the following line (change 1 to 0):
> >
> > #define OMPI_ENABLE_PTY_SUPPORT 0
> >
> > 16. opal/util/stacktrace.c
> >
> > FPE_FLTINV not present in signal.h
> >
> > workaround: edit opal_config.h to turn off
> >
> > OMPI_WANT_PRETTY_PRINT_STACKTRACE (this can be explicitly configured out
> >
> > but I don't want to reconfigure because I hacked #15 above)
> >
> > 17. opal/mca/base/mca_base_open.c
> >
> > gethostname() -- same as opal/util/output.c, must include hostLib.h
> >
> > 18. opal_progress.c
> >
> > from opal/event/event.h (that I modified earlier)
> >
> > cannot find #include <sys/_timeradd.h>
> >
> > It is in opal/event/compat/sys
> >
> > workaround: change event.h to include the definitions that are present
> >
> > in _timeradd.h instead of including it.
> >
> > 19. Link errors for opal_wrapper
> >
> > strcasecmp
> >
> > strncasecmp
> >
> > I rolled my own in mca_base_open.c (temporary fix, since we may come across
> > this problem elsewhere in the code).
> >
> > 20. dss_internal.h uses a type 'uint'
> >
> > Not sure if it's depending on something in the headers, or something it
> >
> > defined on its own.
> >
> > I changed it to be just like the header I found somewhere under Linux
> > /usr/include:
> >
> > #ifdef MCS_VXWORKS
> >
> > typedef unsigned int uint;
> >
> > #endif
> >
> > 21. struct iovec definition needed
> >
> > orte/mca/iof/base/iof_base_fragment.h:45: warning: array type has
> >
> > incomplete element type
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <net/uio.h>
> >
> > #endif
> >
> > not sure if this is right, or if I should include something like
> >
> > <netBufLib.h> or <ioLib.h>
> >
> >
> > 22. iof_base_setup.c
> >
> > struct termios not understood
> >
> > can only find termios.h header in 'diab' area and I'm not using that
> >
> > compiler.
> >
> > a variable usepty is set to 0 already when OMPI_ENABLE_PTY_SUPPORT is 0.
> >
> > So, why are we compiling this fragment of code at all? I hacked the file
> >
> > so that the struct termios code will not get compiled.
> >
> > 23. oob_base_send/recv.c, oob_base_send/recv_nb.c. struct iovec not known.
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <net/uio.h>
> >
> > #endif
> >
> > 24. orte/mca/rmgr/base/rmgr_base_check_context.c:58: error:
> >
> > `MAXHOSTNAMELEN' undeclared (first use in this function)
> >
> > #ifdef MCS_VXWORKS
> >
> > #define MAXHOSTNAMELEN 64
> >
> > #endif
> >
> > 25. orte/mca/rmgr/base/rmgr_base_check_context.c:58:
> >
> > gethostname()
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <hostLib.h>
> >
> > #endif
> >
> > 26. orte/mca/iof/proxy/iof_proxy.h:135: warning: array type has
> >
> > incomplete element type
> >
> > ../../../../../orte/mca/iof/proxy/iof_proxy.h:135: error: field
> >
> > `proxy_iov' has incomplete type
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <net/uio.h>
> >
> > #endif
> >
> > 27. /orte/mca/iof/svc/iof_svc.h:147: warning: array type has incomplete
> >
> > element type
> >
> > ../../../../../orte/mca/iof/svc/iof_svc.h:147: error: field `svc_iov'
> >
> > has incomplete type
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <net/uio.h>
> >
> > #endif
> >
> > 28. ../../../../../orte/mca/oob/tcp/oob_tcp_msg.h:66: warning: array
> >
> > type has incomplete element type
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp_msg.h:66: error: field `msg_iov'
> >
> > has incomplete type
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp_msg.h: In function
> >
> > `mca_oob_tcp_msg_iov_alloc':
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp_msg.h:196: error: invalid
> >
> > application of `sizeof' to incomplete type `iovec'
> >
> >
> > 29. ../../../../../orte/mca/oob/tcp/oob_tcp.c:344: error: implicit
> >
> > declaration of function `accept'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c: In function
> >
> > `mca_oob_tcp_create_listen':
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:383: error: implicit
> >
> > declaration of function `socket'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:399: error: implicit
> >
> > declaration of function `bind'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:407: error: implicit
> >
> > declaration of function `getsockname'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:415: error: implicit
> >
> > declaration of function `listen'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c: In function
> >
> > `mca_oob_tcp_listen_thread':
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:459: error: implicit
> >
> > declaration of function `bzero'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c: In function
> >
> > `mca_oob_tcp_recv_probe':
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:696: error: implicit
> >
> > declaration of function `send'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c: In function
> >
> > `mca_oob_tcp_recv_handler':
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:795: error: implicit
> >
> > declaration of function `recv'
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c: In function `mca_oob_tcp_init':
> >
> > ../../../../../orte/mca/oob/tcp/oob_tcp.c:1087: error: implicit
> >
> > declaration of function `usleep'
> >
> > This gets rid of most (except bzero and usleep)
> >
> > #ifdef MCS_VXWORKS
> >
> > #include <sockLib.h>
> >
> > #endif
> >
> > Trying to reconfigure the package so CFLAGS will not include -pedantic.
> >
> > This is because $WIND_HOME/vxworks-6.3/target/h/string.h has protos for
> >
> > bzero, but only when #if _EXTENSION_WRS is true. So turn off
> >
> > -ansi/-pedantic gets this? In my dreams?
> >
> > On Mar 17, 2010, at 9:54 PM, $)AUE>' wrote:
> >
> > Hello all,
> >
> >
> >
> > In order to add some real-time feature to the OpenMPI for some research ,I
> > need a OpenMPI version running on VxWorks. But after going through the
> > Open-MPI website ,I can't found any indication that it supports VxWorks .
> >
> >
> >
> > Follow the thread posted by Ralph Castain ,
> > http://www.open-mpi.org/community/lists/users/2006/06/1371.php .
> > I read some paper about the OpenRTE ,like "Creating a transparent,
> > distributed, and resilient computing environment: the OpenRTE project" and
> > "The Open Run-Time Environment (OpenRTE):A Transparent Multi-cluster
> > Environment for High-Performance Computing"which is written by Ralph H.
> > Castain $)G!& Jeffrey M. Squyres and others .
> >
> >
> >
> > Now I have a basic understanding of the OpenRTE , however ,there is too few
> > document of the OpenRTE describing the implement of the OpenRTE . I don't
> > know
> > where and how to begin the migration . Any advice will be appreciated.
> >
> >
> >
> >
> >
> > Thanks
> >
> >
> >
> > Jing Zhang
> >
> > _______________________________________________
> > devel mailing list
> > devel_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/devel
> >
> > _______________________________________________
> > devel mailing list
> > devel_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/devel
> >
>
>
>
> --
> $)AUE>'
>
>
> _______________________________________________
> devel mailing list
> devel_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/devel

-- 
Jeff Squyres
jsquyres_at_[hidden]
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