Re: [Discuss-gnuradio] GNU Radio CVS-current vmcirbuf problems

[Berndt Josef Wulf]

On Thu, 13 Oct 2005 06:57, Eric Blossom wrote:
> On Thu, Oct 13, 2005 at 06:32:03AM +0930, Berndt Josef Wulf wrote:
> > > (1) Re sysv_shm, increase the system limits using sysctl:
> > >
> > >   http://mail-index.netbsd.org/tech-kern/2002/07/07/0003.html
> >
> > shminfo:
> >         shmmax: 268435456       (max shared memory segment size)
> >         shmmin:       1 (min shared memory segment size)
> >         shmmni:     128 (max number of shared memory identifiers)
> >         shmseg:     128 (max shared memory segments per process)
> >         shmall:   65536 (max amount of shared memory in pages)
>
> Try increasing shmmni and shmseg to 512 or 1024.
>
> > > (2) gr_vmcircbuf_mmap_shm_open might work.
> > >
> > > It requires mmap and shm_open.  mmap has been around forever, and
> > > shm_open is defined in POSIX 1003.1 (2001).  Does NetBSD implement
> > > both of these calls?  If so, our configure tests need some tweaking.
> > > Can you confirm or deny the availability of shm_open on NetBSD, and if
> > > it exits, which library it's contained in?
> >
> > mmap(2) as part of libc, but I couldn't find shm_open(?) in the hurry but
> > the following:
> >
> > shmat, shmdt (2) - map/unmap shared memory
> > shmctl (2) - shared memory control operations
> > shmget (2) - get shared memory segment
>
> These are the SysV shared memory system calls.
>
> > > (3) Fix gr_vmcircbuf_mmap_tmpfile so that it works reliably, and
> > > doesn't unmap pieces of the address space that it didn't map in.
> > >
> > > (4) Come up with some other way to get a single piece of physical
> > > memory mapped into two adjacent virtual addresses.  You may be able to
> > > use mmap with MAP_ANON and/or /dev/zero and then remap it using some
> > > kind of /proc/self/mem trick (didn't work on GNU/Linux).
> >
> > Just when I thought things have settled ready for the next release... ;-)
>
> Sorry about that!
> I suspect that increasing shmmni and shmseg will fix your problem.
>
> > Anyone with FreeBSD seeing this problem too?
> >
> > cheerio Berndt
>
> Eric

gmake check fails for ghe grvmcircbuf stuff see below. I don't quite 
understand why it barks about not finding mmap. Its supported on NetBSD and 
it should work.

gmake[3]: Entering directory 
`/usr/src/gnuradio/gr-build/gnuradio-core/src/tests'
.Testing gr_vmcircbuf_createfilemapping_factory...
gr_vmcircbuf_createfilemapping: createfilemapping is not available
....... gr_vmcircbuf_createfilemapping_factory: Doesn't work
Testing gr_vmcircbuf_sysv_shm_factory...
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
....... gr_vmcircbuf_sysv_shm_factory: Doesn't work
Testing gr_vmcircbuf_mmap_shm_open_factory...
gr_vmcircbuf_mmap_shm_open: mmap or shm_open is not available
....... gr_vmcircbuf_mmap_shm_open_factory: Doesn't work
F.........gr_vmcircbuf_createfilemapping: createfilemapping is not available
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
gr_vmcircbuf_mmap_shm_open: mmap or shm_open is not available
gr_vmcircbuf_sysconfig: unable to find a working factory!
E.gr_vmcircbuf_createfilemapping: createfilemapping is not available
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
gr_vmcircbuf_mmap_shm_open: mmap or shm_open is not available
gr_vmcircbuf_sysconfig: unable to find a working factory!
E.gr_vmcircbuf_createfilemapping: createfilemapping is not available
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
gr_vmcircbuf_mmap_shm_open: mmap or shm_open is not available
gr_vmcircbuf_sysconfig: unable to find a working factory!
E.gr_vmcircbuf_createfilemapping: createfilemapping is not available
gr_vmcircbuf_sysv_shm: shmat (1): Too many open files
gr_vmcircbuf_mmap_shm_open: mmap or shm_open is not available
gr_vmcircbuf_sysconfig: unable to find a working factory!
E................No 3DNow! support; not tested
.No 3DNow! support; not tested
.No 3DNow! support; not tested
....No 3DNow!Ext support; not tested
.No 3DNow!Ext support; not tested
.No 3DNow!Ext support; not tested
.No 3DNow! support; not tested
.No 3DNow! support; not tested
.No 3DNow! support; not tested
....No 3DNow!Ext support; not tested
.No 3DNow!Ext support; not tested
.No 3DNow!Ext support; not tested
.No 3DNow! support; not tested
.No 3DNow! support; not tested
.No 3DNow! support; not tested
....>>> gr_fir_fff: using SSE
. [generic] [SSE]
. [generic] [SSE]
. [generic] [SSE]
. [generic] [SSE]
. [generic] [SSE]
. [generic] [SSE]



!!!FAILURES!!!
Test Results:
Run:  59   Failures: 1   Errors: 4


1) test: qa_gr_vmcircbuf::test_all (F) line: 39 qa_gr_vmcircbuf.cc
equality assertion failed
- Expected: 1
- Actual  : 0


2) test: qa_gr_buffer::t0 (E)
uncaught exception of type std::runtime_error
- gr_vmcircbuf_sysconfig


3) test: qa_gr_buffer::t1 (E)
uncaught exception of type std::runtime_error
- gr_vmcircbuf_sysconfig


4) test: qa_gr_buffer::t2 (E)
uncaught exception of type std::runtime_error
- gr_vmcircbuf_sysconfig


5) test: qa_gr_buffer::t3 (E)
uncaught exception of type std::runtime_error
- gr_vmcircbuf_sysconfig


FAIL: test_all
===================
1 of 1 tests failed

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