Memory Barriers for (Ubuntu) Linux (i686) Post: 302430614

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Special Forums UNIX and Linux Applications High Performance Computing Memory Barriers for (Ubuntu) Linux (i686) Post 302430614 by gorga on Friday 18th of June 2010 06:27:48 AM

06-18-2010

Registered User

Quote:

Originally Posted by fpmurphy

Huh? NPTL is a 1:1 threading model. NGPT is an M:N threading model. Of course the kernel is involved.

I was referring to the older GNU Portable Threads...

GNU Pth - The GNU Portable Threads

"Pth doesn't require any kernel support, but can NOT benefit from multiprocessor machines."

Hmm...

"In practice, this is no problem, because multiprocessor systems are rare, and portability is almost more important than highest concurrency."

(Written some time ago I presume)

You're referring to Next Generation Posix Threads developed by IBM though. I'm not sure but wasn't this abandoned in favour of simpler 1:1 threading in NPTL? But anyway, I needed something with more control than was on offer with something featuring a standard posix api.

gorga

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LEARN ABOUT CENTOS

pth-config

PTH-CONFIG(1)						       GNU Portable Threads						     PTH-CONFIG(1)

NAME

       pth-config - Pth library build utility

VERSION

       GNU Pth 2.0.7 (08-Jun-2006)

SYNOPSIS

       pth-config [--help] [--version] [--all] [--prefix] [--exec-prefix] [--bindir] [--libdir] [--includedir] [--mandir] [--datadir] [--acdir]
       [--cflags] [--ldflags] [--libs]

DESCRIPTION

       The pth-config program is a little helper utility for easy configuring and building applications based on the pth(3) library.  It can be
       used to query the C compiler and linker flags which are required to correctly compile and link the application against the pth(3) library.

OPTIONS

       pth-config accepts the following options:

       --help
	   Prints the short usage information.

       --version
	   Prints the version number and date of the installed pth(3) library.

       --all
	   Forces the output of all flags, that is, including extra flags which are not Pth specific.

       --prefix
	   Prints the installation prefix of architecture independent files

       --exec-prefix
	   Prints the installation prefix of architecture dependent files.

       --bindir
	   Prints the installation directory of binaries.

       --libdir
	   Prints the installation directory of libraries.

       --includedir
	   Prints the installation directory of include headers.

       --mandir
	   Prints the installation directory of manual pages.

       --datadir
	   Prints the installation directory of shared data.

       --acdir
	   Prints the installation directory of autoconf data.

       --cflags
	   Prints the C compiler flags which are needed to compile the pth(3)-based application. The output is usually added to the "CFLAGS" vari-
	   able of the applications "Makefile".

       --ldflags
	   Prints the linker flags ("-L") which are needed to link the application with the pth(3) library. The output is usually added to the
	   "LDFLAGS" variable of the applications "Makefile".

       --libs
	   Prints the library flags ("-l") which are needed to link the application with the pth(3) library. The output is usually added to the
	   "LIBS" variable of the applications "Makefile".

EXAMPLE

	CC	= cc
	CFLAGS	= -O `pth-config --cflags`
	LDFLAGS = `pth-config --ldflags`
	LIBS	= -lm `pth-config --libs`

	all: foo
	foo: foo.o
	    $(CC) $(LDFLAGS) -o foo foo.o $(LIBS)
	foo.o: foo.c
	    $(CC) $(CFLAGS) -c foo.c

SEE ALSO

       pth(3), cc(1).

AUTHOR

	Ralf S. Engelschall
	rse@engelschall.com
	www.engelschall.com

08-Jun-2006							   GNU Pth 2.0.7						     PTH-CONFIG(1)